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Description
Exercises for the Feynman Lectures on Physics (New Millennium)Combined into one volume for the first time, the updated and clarified Exercises for the Feynman Lectures on Physics provides comprehensive, hands on practice in all the most important areas of physics from Newtonian mechanics through the theory of relativity and quantum mechanics. A perfect complement to The Feynman Lectures on Physics, these exercises have all been assigned in Caltech's mandatory two year introductory physics course, either when
Combined into one volume for the first time, the updated and clarified Exercises for the Feynman Lectures on Physics provides comprehensive, hands-on practice in all the most important areas of physics -- from Newtonian mechanics through the theory of relativity and quantum mechanics. A perfect complement to The Feynman Lectures on Physics, these exercises have all been assigned in Caltech's mandatory two-year introductory physics course, either when Richard Feynman was teaching it, or during the nearly two decades that followed when The Feynman Lectures on Physics was used as the textbook. With this modern, easy-to-use volume, students of physics will have a chance to apply what they have learned in the Lectures and to enhance and reinforce the concepts taught by the inimitable Richard Feynman.Shipping Notes
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4.5 ★★★★★
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Product Reviews
★★★★★ 5
Lightweight Fabric with a Bit of Stretch
Color: Black, Size: Medium, Color: Black, Size: Medium
I'm a fan of any fabric that has a small percentage of Spandex in the blend -- like these pants. (Along with mostly polyester and viscose.) It's not noticeably stretchy but the comfort is there. The fabric is very light and smooth -- and the stripes make a nice design statement. (They're giving me "gangster" vibes. Ha!)
I have a 32" waist and the Medium fits me perfectly (with a little room to spare). I do have to hem the bottoms since I'm on the short side, but they taper nicely down the leg. There's an "adjustable waist" mentioned in the headline description, but I don't see anything resembling an adjustable waist on the pants. Just a hook and button closure. (Maybe I'm missing something?) I'm happy to add these to my wardrobe.
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Reviewed in the United States on May 30, 2025
★★★★★ 5
Second Best Bifold I’ve Owned
Color: Black
I’ve gone through a lot of wallets over the years (cheap ones, expensive ones, slim cardholders, you name it), and this Timberland bifold with the attached flip pocket is easily the best all-around wallet I’ve ever carried.
The leather is excellent: full-grain, soft right out of the box, and it’s aged beautifully in just a few months with a rich patina that actually looks better with every scratch and scuff. Build quality is top-notch: tight, even stitching, no loose threads, and the edges are finished cleanly. Four months of daily front-pocket carry and it still looks practically new.
Layout is perfect for me. Six card slots plus the two slip pockets behind them handle everything I need (10 cards + a few folded bills) without getting bulky. The attached flip ID window is a game-changer; I keep my driver’s license and work badge there and can show either in seconds without opening the wallet. Cash fits easily in the full-length bill compartment.
It’s genuinely slim for a traditional leather bifold, sits comfortably in both front and back pockets, and never feels like a brick. The embossed Timberland logo is subtle and classy.
At this point I can’t imagine switching to anything else. It’s durable, functional, looks sharp, and was a fraction of the price of some “luxury” wallets that didn’t last half as long. If you want a classic leather bifold that actually delivers, this is it. 100% recommended; already planning to buy another as a backup.
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Reviewed in the United States on December 6, 2025
★★★★★ 5
Rugged Timberland Quality—The Best Bifold for "Double ID" Needs
Color: Black (Sportz)
Design & Capacity:
I’ve been using this wallet for two weeks, and it’s a powerhouse for organization. The attached flip pocket is a game-changer for me because I have to carry both a driver's license and a work security badge. The two ID windows let me show both without digging through card slots.
Genuine Leather: Looks and smells premium; will likely weather nicely with age.
The Slimness Factor:
Timberland calls this a "slimfold," and while it is thinner than a traditional trifold, the flip-out pocket does add some depth. With 6 cards and 5 bills, it measures about 0.75 inches thick. It fits comfortably in my back pocket, but it might be a bit much for a front-pocket-only user.
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Reviewed in the United States on February 5, 2026
★★★★★ 5
Wanting a standard nice wallet. Get this
Color: Black, Color: Black
Your standard wallet. Nothing to complain about. Does what it’s supposed to and I have no complaints. The fit is amazing. Holds at least 17 20 dollar bills and over. Durability is also amazing to say the least. Doesn’t rip at all, with a lot of money in it. Its thickness ties in with how much money you can fit in it, so I won’t go into that category. Overall what you see is what you get. A standard, nice, durable wallet that sticks into your pants.
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Reviewed in the United States on March 26, 2026
★★★★★ 4
High Quality but with tiny holes
Color: Navy (Blix)
There were two very tine holes on top of the wallet unfortunately. Otherwise the product nice snd high quality. I like it a lot but unfortunately I returned it back. That is the reason I gave 4 starts.
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Reviewed in the United States on June 27, 2025
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