Helsinki Bay

I am in cool Helsinki, arriving yesterday from Munich. 

Helsinki is becoming a favorite destination and I meet with a group of Finns who want money to invest in Russia and Eastern Europe. I learn about this region (there have been three wars between the states in modern times - but the young carry no baggage) and consider the private equity opportunities. 

I do recall that last year the Kremlin repatriated (stole) ownership of Royal Dutch Shell's Sakhalin-2 project following years of Western investment; today it is announced that the TNK-BP joint venture is under pressure as Board members denied visas. Not very subtle dude. Political risk to be weighted against today's energy pricing which converts Russia's resources to the high street: consumerism thrives and Russia retakes its place in the world - all very visible at the G8 (at least Bush does not have a cute nick name for Medvedev- remember Putey-Poot? - November cannot come fast enough, oh brother). 

Interestingly the majority of foreign, private capital into Russia arrived in the early 1990s from Americans - including foundations and endowments - to stamp out Communism for good. These funds disappeared forever in the 1997-98 Russian crisis. 

Now the Russians lecture America on its busted domestic policies that destabilise the world. Sigh. This evening I am greeted by the kids loud bath tub squeals and their demand for presents. Good to be home (photo from WWW).

Omaha Swimming

Qwest Center Pool

Here's a cool photograph of the Qwest Center where the US trials have taken place this week (photo from the swim foundation). Phelps wins the 100-meter butterfly last night, beating five-year rival and former world record holder Ian Crocker. His time of 50.89 would have beat Mark Spitz by over three seconds or at least two body lengths. 

Still, it is just ho-hum for Phelps, who leaves this week with two world records, a U.S. open record and the chance to go for eight gold medals at the Beijing. Says the humble Spitz on Phelps winning seven: "It would be like the second moon walking." On eight: "First man on mars." 

Over-looked this week perhaps is Katie Hoff, who quietly(?) takes five races to Asia herself. While she did not break Janet Evans's 15-year 800-meter freestyle record yesterday finishing in 8:20.81 vs 8:16.22 (my best time in this event BTW was 8:35 in '85), Hoff did re-establish her World Record in the 400 I.M. earlier with a time of 4:31.12. 

Not surprisingly, she trains with Phelps at North Baltimore Aquatic Club. Could she nip Mark Spitz's seven-gold record while everybody focused on the men? Will be fun to find out next month.

It's a wet day - Wimbledon final, of course - and we without our car. We're shuffle around town in a town car from swim practice to party to Kew Garden where we meet Dakota and Dana, who is two weeks away from child #2. Dana joined a trust six months ago to establish their private equity program and she is off to a great start.

The kids find lengthy branches at Kew and immediately dream of Harry Potter, their flying apparatus named "Bullet" (Madeleine) and "Light Speed." We race about an old Robinia pseudoacacia.

Islington

Sonnet and I are in Islington last night for Anthony's 33rd birthday (the kid is sooo young). Aggie babysits. The party is at a way cool bar, and the theme is to dress like we did ten years ago - pictured (I think). This BTW is when Anthony arrived in London. Interestingly I learn that he came to London from Australia via NY and Paris, where he arrived with a dime to his name and could barely make the distance from the airport to the youth hostel (I comment encouragingly: "you were living by your wits" - yes, we were drinking and my clever comment doesn't sound particularly clever now). From there, Ant befriended another Aussie - and presto! - he's a waiter. Today he works for a software company and heads up the UK business (says his profile: "Not cool enough to be a bartender. Too cool to be a geek." I might argue with the first statement). So before the par-tay Sonnet and I have dinner at a romantic Frenchie - Islington being one of the coolest neighborhoods in London there is great people watching. It is young and scruffy - unshaved lads, sexy little outfits and striving yuf and slacker dudes. Sonnet and I looked at flats in this area before settling in leafy Maida Vale- part of us wishes we had been on the edgier part of town, so fun to visit now. And of course we are the oldest couple at the party, if not the bar. Ah, well.

Torres

Eitan rips open the sports pages and screams: "Berbatoff might go to Manchester United!" and yes, we know it is Sunday morning. The boy is also pretty happy about the full-size poster of Torres which, no doubt, will be plastered on his wall. This morning Madeleine and I go for an early morning walk to have a coffee and hot-chocolate at Cafe Nero. London is dead at this Sunday hour, and we swap playground gossip and talk about favorite bands (Duran Duran, Arctic Monkey, Killers . .. .). She asks me why we cannot say certain words like "the 'fu' word." Sonnet explained once that it is an ugly expression for something beautiful, which I think the right response. I add that is is forceful and meant to make people feel bad. Or angry. She nods knowingly but the kids has a lot to understand. At Nero, she leans back in her chair, hands behind head, and comments: "It's good to be a kid."

Five

Dara Torres proves there is Olympic life after 40: she wins the womens 100-meter freestyle and qualifies for her fifth games. Bravo. (photo from Getty Images).
In case one forgets, here is nine years ago:
"At 32, Torres is finding her current comeback to be a bit more challenging than her last. However, Torres is driven by a unique incentive: If she qualifies for Sydney she will become the first American --male or female -- to swim in four Olympics (only eight non-U.S. swimmers have accomplished that feat). "We're going to take it one day at a time and see where it leads," says [coach Richard] Quick. Hopefully, for Torres it'll lead to a pool down under. "

Eitan has a party where, amongst other things, the kids will see "Kung Fu Panda" (don't ask). Madeleine wants to go too, of course. Eitan's natural reply - no way! - nets wails of hurt and anger from her. Thems are the breaks.

Madeleine continues to bandage herself with medic wrap, to take care of her "really really really bad arm-pain." She's got the stuff around her knee ("knee pain dad") and write ("ouch there too"). In addition she slings her elbow and informs the breakfast table that she will wear the apparatus during football: "see, I can score more goals" and she runs around the living room proving to us how. At the football pitch moments later, the kids square off and charge! they run at each other like the blood thirsty little gladiators they are. Madeleine is pretty tough, but not the best player on the pitch: she does not yet have the eye of the tiger like, say, her brother. She shouts "ball!" but doesn't quite know what to do when it arrives. This will come, Dear Reader, this will come.

On the walk home I ask Madeleine to squeeze my hand when I say something she does not like: Eitan going to Kung Fu Panda - squeeze. Being bossed around by Eitan - squeeze. By me - squeeze squeeze. Baby sitters - squeeze, unless Aggie. School - no squeeze (good!). Kumon- no squeeze. Broccoli - squeeze. Vegetables - squeeze. And so it goes....

Dimple

Madeleine shows me her dimple at The Plough, a neighborhood public house which recently re-opened following refurbishment. At the table next to ours is the school secretary and several teachers including Madeleine's teacher. This ads a certain, ahem, frisson as Madeleine wants to interrupt their, er, drinking. Sonnet is with Eitan at swim practice.

Speaking of swimming, the USA trials have been a blow out for US and World records. Of considerable note to me and the old-timers reading this is 41 year-old Darre Torres who yesterday posted the third fastest time in the preliminaries with a time of 54.57 (in 1984 the Gold winning time was 55.92 by Carrie Steinseifer and Nancy Hogshead - great name for a female sprint swimmer). If Torres qualifies today or the weekend in the 50, it will be her fifth Olympics. Heroes Michael Phelps and Katie Hoff and Natalie Coughlin steal the show.

Happy 4th!

Madeleine at arts & crafts. She works on a bust. My photo from a blackberry so sorry for the poor quality.

Yesterday I return from Copenhagen where I am with Mike. We meet some investors and take in the good weather while sitting by the water - little mermaid! - and contemplate investments and life, which is good. Returning to Heathrow I discover my car key lost - the only one I have BTW (as Sonnet says: "I'm glad it was you." I agree). What a nuissance - despite databases, vehicle identification numbers and technology, I am required to go the dealer in person to order a new key. Once the key arrives in three days, I must bring the car to the dealer for new programming. To do so, the car must be towed. It now sits in the business park, racking up £40 a day. Sigh.

Eitan and Madeleine have sports day at school. While both are excited, Eitan is especially excited. He goes to bed at 7PM and eats an extra bowl off cereal. He sets his alarm at 4:35AM for some reason then can't go back to sleep. In short: the boy is amped. The trials are for years one and two, and the parents - about 300 of us - gather on the main lawn and watch the teachers and Head Teacher prepare the sports. By coincidence Eitan is in the first-heat and all the kids chant: "Eitan! Eitan! Eitan!" (much to my surprise, BTW). The School Deputy blows a whistle and the kids race about 70 yards down a marked stretch to break the tape. Eitan wins his race and content with himself. Madeleine also proves a fierce competitor, placing second to an uncorrected false-start (not that we parents are noticing). Following the speed work comes the obstacle course: jumps, hoops, ropes and water cups, which are skipped, balanced and bounced. It's all good fun, and I'm smart enough to duck out before the parent races (Sonnet's is dragged in by Madeleine).

All American

Mike and Gretchen with their family in front of that famous palace in Kensington. They arrived at the same time as us and kids same age; they returned to the US one year ago. Transition behind them, they now holiday in London and we picnic in Hyde Park.

Everybody a-twitter about Andy Murray's today match against Spaniard Nadal, who bids to be the third man to win the French Open and Wimbledon in the same year. Murray has exploded onto the seen and a country places its high-hopes upon his shoulders. No one can remember the last time a Brit won the thing and Tim Henman, a world Top Ten, let us down every year he played. Fans over-night on the grounds in an apparently festive scene with BBQs, tents and cheer (as reported by Radio 4). Also on Radio 4 this morning - in one of the more enjoyable interviews I've heard - is the Jelly Competition as part of the London Festival of Architecture, which is on until 20 July. The idea, Dear Reader, is to connect architecture and food which one interviewee notes "began with pastry." Amen.

Derain

Here is the London Bridge by Andre Derain who, with Matisse, founded Fauvism (the expression stems from what they called themselves: les fauves, or "the wild beasts"). As here, Derain put forward portraits of London that were radically different from anything done by previous painters of the city such as Monet or Whistler. Here is how Picasso's girlfriend describes him: "Slim, elegant, with a lively colour and enamelled black hair. With an English chic, somewhat striking. Fancy waistcoats, ties in crude colours, red and green. Always a pipe in his mouth, phlegmatic, mocking, cold, an arguer." Is there a doubt that they shagged?

The MOMA used to have a no-photagraphy rule, which holds true in most European museums. The reason, of course, is to avoid copy right infringement and boost gift-shop sales. Snappers snap away and why not? It helps one remember favorites and makes for a nice screen saver sometimes.

KT - SF Chronicle

Madeleine watches Pokomon, which for the life of me I don't understand. While she sees action or whatever, I see cheap aneme and plotless silliness. I ask her to explain the fascination - fat chance: "shush dad! It's a kids thing."

Katie is interviewed in by the San Francisco chronicle Monday (below). For the interview, she excuses herself from our roof-deck conversation and politely takes a reporter's call. Any typical day.

"When it comes to the opinion pages of some of the most influential American newspapers, it's far too often a man's world. One reason for the disparity is obvious: Women are still breaking through glass ceilings in business, government and academia.

But another possible reason could be found a half hour into a recent daylong opinion-writing seminar for women in San Francisco, led by author and Op-Ed Project founder Catherine Orenstein. Orenstein went around the room and asked the six assembled women, ranging in age from early 30s to mid-60s, to finish the sentence, "I'm an expert in ..."

Read the full article

Andy Murray, Britain's #1 ranked tennis player, keeps the country on knife's edge in last night's 3 hour, 58 minute win against Frenchman Richard Gasquest. At one point Murray is down two sets to nil and the third a tie-breaker. Me- I split when Murray looks lost to meet a friend at the neighborhood pub. Of course I miss the action and maybe the most exciting match of the tournament. Damn.

Cinq-à-sept

Eitan before last night's game. The last thing he says, as I tuck him into bed: "I cannot believe Spain won" as he drifts off into a perfect sleep (granted two hours past bedtime). Wouldn't it be nice to be seven and able to switch loyalties so readily? For the boy, it went England (who did not qualify) then Portugal (knocked out by Russia) and Spain - who win it all. This would be like me bouncing Cal for the Trojans. Mon dieu.

The French have this cool thing called cinq à sept (five to seven), or the time between work and family. Its a myth that Frenchmen use it to rendezvous with their mistresses - but again, there is always some truth to these things. My experience in France is for shopping or drink - happy hour, sort of - but above all, it is selfish time. The British work to hard - and are no way elegant enough - to pull something like this off.

Sonnet off early and I awake to find both kids fully dressed staring at me: "Dad's face is red in the morning" Madeleine observes. "It is always red" says Eitan. "Especially if he is angry." Monday morning, Dear Reader. Monday morning,

Double Decker

The Airbus 380, also known as the "SuperJumbo," made its first commercial voyage in October 2007 from Singapore to Sydney (I take this photo at Heathrow last week). Development cost: €11 billion mostly from government grants - no wonder Boeing bitched. The A380's upper deck extends along almost the entire length of the fuselage, and its width is equivalent to that of a widebody aircraft. This allows a cabin with 50% more floor space than the 747 "Jumbo" and provides seating for 525 people in standard three-class set up or up to 853 people in all-economy, which would suck. The plane has a flight range of 8,200 nautical miles or sufficient from New York to Hong Kong. It's cruising speed is Mach 0.85 (about 900 km/h or 560 mph at cruise altitude). As I fly Virgin Atlantic, I ask the gate staff when Richard is going to buy one? and they are clearly jealous of Singapore. Do not worry - it is coming. As of 2008, 192 orders placed and five deliveries - delays caused a management departure at owner EADS and a insider-dealing investigations. The beast impresses.

"There is the tradition of good old Europe that has made this possible,"
Gerhard Schröder

Eitan makes a Spanish flag for tonight. On the backside, he pastes a few trading cards and vital player stats. He informs me of the cheer: es-pan-yol followed by three forceful thumps (or claps).

Eitan's Spain wins the European Cup, defeating Germany one-nil. Torres, who plays for Liverpool, scores the only goal.

Upper West

Katie in action

Mid-morning Wednesday we buy the papers, make our calls or emails and I overhear my sister discuss The Op-Ed Project which is something she clearly loves. It has momentum and every woman I meet wants to be involved somehow and has something to contribute - a sure sign she is onto something good. A best thing about Katie's life is that everything is generally within two blocks: greasy diner, pedicure, Korean fruit & vedg, yoga, coffee ... the park nearby for running and best friends all within walking distance. I can see why hard to leave NY once sorted. In London and yesterday, I shuffle the kids to swimming, football and performance class while sonnet at CHODA. Afterwards we nap - a forced activity for the sprogues - who wants to sleep on a beautiful Saturday? Eitan and I have a deal for the German-Spain Euro Cup final Sunday: as a week night, he sleeps extra-time. The boy does not complain and will watch the game with Joe-Y-H and others at Joe's house with friends, several German. Eitan roots for Spain BTW as Torres plays for Manchester United and Fabregas the lead scorer for Arsenal. It's like watching the NFL and rooting against a city because you hate the airport - it's personal. Eitan and his gang know more about their players then, well, anything. I cannot keep up with the sponge who has stats on anybody playing tonight. Including the bench.

Madeleine does her homework which is to describe her summer. She asks: "are we going to Vermont? Paris? That Hotel?" She also remembers "the sprinklers."

I pay Madeleine five-p every time she reads "a" instead of saying "ah" while completing "The Treasure Chest."

At the hardware: I give in and buy the kids alarm-clocks (not sure where my mind was on that one). Eitan's goes off at 6:05AM this morning, yes Sunday. Madeleine upset because hers not first. God.

4AM

Adam on the Lower West Side.

I'm in New York the first-half last week to visit Tim and Kitty, who had their baby five weeks ago. Not all babies are cute and this one is way cute. I forget how remarkable a newborn, and to see her on the bed struggling to understand her limbs brings back memories - none, of course, being about exhaustion or nappies. Eitan and Madeleine's early years, despite struggling with a wack job business partner and the telecoms Internet boom-bust, were great times. You really learn about your marriage, I'll say. Sonnet and I were at first afraid (terrified) of leaving Eitan alone and so he slept with us... for about three weeks until Sonnet put the Kibosh on that one and he got his own room. Nearly immediately he began sleeping through the night. Madeleine, on the other hand, kept us awake for months, refusing to seed the battle for hunger or comfort. Remarkable first impressions, Dear Sir. Today Madeleine confirms her Tom-Boy status and we do the checklist: climbs trees? Check. Likes sports? Check. Hates Barbie? Check. Jeans or a dress? Jeans, of course.

Back to the moment: it is 4AM and I'm still on West Coast time as I blog now. Sonnet and I have dinner earlier with Sonnet's colleague Malissa who is the senior curator at the de Young Museum in San Francisco. She celebrate her 50th in Europe+London to attend the CHODA conference, which Sonnet chairs. Years ago, Sonnet was an intern at the de Young and so Malissa recommended the Courdault Art Institute and wrote Sonnet's key recommendation (Malissa an alum). In large part our being in Britain is due to her, God bless. Malissa knows everybody in the dress-fashion-design world and boy is their catching up a conversation. While Sonnet away, Malissa tells me that she and everybody are thrilled Sonnet has achieved: "she makes us all look good." Amen, brother.

The OP

The Pacific at Point Lobos. No Californian is far from the ocean and the luckiest live by it. Stinson, near Berkeley, is a fine example and was an excuse to cut high school many a spring day. The beach located next Muir Woods and a popular day-trip from San Francisco (or the East Bay). Because it is Northern California, the fog sometimes a problem but on a glorious day - who cares? Sonnet and I went to Stinson on our second date BTW. It is surfable, but not a classic break and there are sharks: In 2002, a surfer was attacked by a 12-15 foot-long great white and while the dude survived, he received more than 100 stitches to close his wounds. The attack was the second at Stinson since '98, and the 13th in Marin County since '52. The surf off Stinson is within an area known as the Red Triangle, where there have been an unusually high number of shark attacks. Hmm I wonder if there is some kinda connection with nearby Farallon Islands where the Great Whites migrate every year to feed and mate?

Classic Norcal surfing breaks abound and the best are, just perhaps, 3 and 4 mile points or the same distances from the Santa Cruz light house. To reach the break, a surfer dude must park his car by the HW1 then walk a mile or two through lettuce or cabbage fields to get to a rocky cliff. From there, it is a downward scramble, with board and wet suit, to the ocean. There is no beach nor launch pad. The water is black and cold - 62 degrees in winter - and massive kelp beds reach from the below. Often in fog and with unnatural seaweeds touching the body, it is easy to let the mind wander: shark. Sea lions swim underneath can scare one witless (seen in white flashes). But on a good swell the hassle is worth it - there is no better way to goof than riding those waves.

Into The Light

Laurance before tying the knot. The services at Clint Eastwood's lodge overlooking the valley and the OP. Laurance remains on his feet throughout.

Eitan upset about missing the second half of the Russia v. Spain Eurocup match (past bedtime). He awakes this morning in a foul mood, tired and grumpy. Sonnet is out the door for the Choda Conference she chairs this year, leaving me with the kids (Madeleine re Eitan conspiratorially: "he sure is whinging dad. Are you going to punish him?") All he needs is a hug, which I give him, and he instantly shifts to a better mood. If life were always so simple. The cup final, to be played Sunday, is between Germany and Spain who defeat the Russians 3-nil. We are pulling for Spain all the way given several players in the Premiere League and Eitan knows them and their stats (thank you, trading cards). On the school playground we sort out the match, which will be watched with a few other boys at Joe Y-H's houses Sunday evening. When I tell him this, Eitan excited enough to almost blow his cover and give me a kiss, before he pulls back and races off to the classroom.

CVL

I'm behind in my blog and to my fearless ten readers I say: regrets. Pictured: Carmel Valley Lodge where we stay last week.

Wednesday Moe and Grace greet me at SFO post trans-Atlantic and we drive to CV via Salinas (pop 140,061), a town BTW that remains, steadfastly, in the 1950s. There are franchises which I assumed long-gone like Weinerschnitzel ($5 for five chili dogs), Carvel's ice cream (Dairy Queen too, of course) and a Photo Mat booth in the grocery parking lot for drive-by and drop-off (good God who still develops film?). It is Steinbeck country, Moe points out, and easy to imagine without water. With water, it is one of the most fertile lands in America with lettuce, brussel-sprouts and various greens planted next to sand and dirt (no turtle for the Joads to run over, however). We listen to King Lear along the way (a CD purchased in London) as Sonnet and I will see the play at The Globe. Katie arrives from Stanford's Office of the Presidency where she forms a partnership with The Op-Ed Project. She is fired up.

Moe

Here is Moe, with the usual gleam in his eye, in Carmel Valley where our family re-unions last week. From this, we may surmise that Moe was - and is - a wise-ass. Of many examples, I recall college when he mailed me $1 for every letter home. I got the point.

Growing up we spent a a good summer's week each year in Carmel Valley even locating a local swim club - the Barracudas - so Katie and I could train away. No doubt this is a lovely part of California and while Carmel gets the fog and cool Pacific weather, the valley is sheltered and easily 15 degrees warmer. Last week temps are 105 in the shade. CV Village (median family income: $85,191) has excellent coffee and a good walking destination. Clint Eastwood is still around, I am told, and famously Carmel's mayor (pop 4,000) in 1986. Apparently Clint wanted a golf course, got pissed off by the small-town bureaucracy, ran last-minute and received 73% of the vote. He bailed after one term and who can blame him? Maybe he wanted a fall-back to Every Which Way But Loose when he co-starred with an orangutan. Clint's restaurant, the Hogs Breath Inn, we enjoyed in the '70s and early '80s and remains today more-or-less unchanged - Katie finds it and sends me a pic on her mobile. Cool.

I'm here for Laurance's wedding and the kiddos in school so Sonnet and them remain in London. They'll get theirs when we split Britain for the summer next month.

Madeleine's Rock Collection

Madeleine shows me her rock collection - pictured - and asks my favorite? I tell her the hard one (I can never resist). And how did she find the rocks, Dear Sir? "It's cuz I'm doing digging club." And when I ask, ahem, the obvious question - what does one do in digging club? - she replies matter-of-factly: "we do lots of digging." Madeleine teaches the other kids - Nicki, Jonathan, Max and Billy - "how to dig properly." And how does one do that? "They have to get really far down for it to be proper digging" (she makes a scooping motion). "You have to do it slowly so you can get more dirt." And there, my friend, you have it.

Mass

Eitan asks me how to measure mass. As I consider his question I realise that I have no idea how to even describe mass. Here is Arthur's follow-up:

"

OK, but this is not an easy one...

My thought is that you keep this answer "alive" over a period of time with Eitan because it's something that may take a while for him to truly grasp. Point out the concept when you see examples of it around you in the world.

Technically, mass is the reluctance of an object to move. More technically, it's the reluctance to CHANGE speed. If you start something moving or stop it moving, either way, how hard you have to push is aconsequence of its mass. The problem with this definition is that on earth, most of the time when we move or stop something, we are dealing with a lot of friction that gets in the way of seeing what's going on. For example, it is entirely possible for an ant to push a car. The car
would just speed up very, very slowly because of its large mass and the weak push from the ant. In real life, the friction in the tires and wheel bearings and so on make it impossible for an ant to move a car.

Even a single person has trouble getting much motion going. If you leave out friction, the greater the mass of an object, the harder you need to push to get a result. Twice the mass and you need to push twice as hard for the same change of speed. You may recall that there have been instances of astronauts manhandling satellites orbiting right next to the shuttle. The satellites may weigh a ton or more and it takes a very great effort to move them, but the astronauts can do so. I raise this example because in space, there's no friction.

On earth, one example that occurs to me is really heavy metal doors that some office buildings sometimes have. If you can find one that doesn't have a spring closure (The doors at Seymour center come to mind), you can see for yourself how hard it is to get them moving and then how hard
It is to stop them once they are moving. Maybe you can see a bit of a difference in the doors in your house. The front door is probably pretty solid. Compare that to interior doors, particularly if you can find one that is flimsy and hollow.

Here's something you could try if you have two skate boards. On a really smooth floor (definitely not on carpet), you and Eitan stand facing each other each on a skate board. Now push yourselves apart (push against each other) and you should see that because you are more massive, you move less than Eitan who is less massive. The moral is that for one push you shared, Eitan moved more than you did because of the difference in mass. You can also do this next time you're ice skating and probably get even better results.

Now for the clincher. It turns out that mass is proportional to weight. It's not sort-of or approximately proportional. It's exactly proportional. I remember reading some musings by Einstein in which he
pointed out that no one had ever really questioned why the pull of the earth is exactly proportional to mass (you have to ponder this a moment.

An object that has twice the mass is tugged on by the earth EXACTLY twice as hard - it has twice the weight - with the result that all objects fall towards the earth under the pull of gravity at the same
speed regardless of their mass. A bus and a coin fall at the same speed. The earth pulls on the bus much harder than it pulls on the coin (you can weigh them to see the difference in the earth's pull). Somehow the earth magically determines the mass of the objects (their reluctance to move) and adjusts the tug of gravity by just the right amount to get them moving at the same speed.) Einstein had to develop the theory of general relativity to fully explain this.

So the point of that last paragraph is to point out that you can exactly measure the mass of an object simply by weighing it! But you have to do it on earth. If you do it on the moon you will get a different weight because the pull of the moon's gravity is much less. Of course you can still use the weight on the moon to determine mass, but you need to take into account the weaker gravity.

Phew!

"