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Description
Six Not-So-Easy Pieces: Einstein's Relativity, Symmetry, and Space-TimeNo twentieth century American scientist is better known to a wider spectrum of people than Richard P. Feynman (1918 1988) physicist, teacher, author, and cultural icon. His autobiographies and biographies have been read and enjoyed by millions of readers around the world, while his wit and eccentricities have made him the subject of TV specials and even a theatrical film. The spectacular reception of the book and audio versions of Feynman's Six Easy
No twentieth-century American scientist is better known to a wider spectrum of people than Richard P. Feynman (1918-1988) -- physicist, teacher, author, and cultural icon. His autobiographies and biographies have been read and enjoyed by millions of readers around the world, while his wit and eccentricities have made him the subject of TV specials and even a theatrical film. The spectacular reception of the book and audio versions of Feynman's Six Easy Pieces (published in 1995) resulted in a worldwide clamor for "More Feynman More Feynman " The outcome is these six additional lectures, drawn from the celebrated three-volume Lectures on Physics. Though slightly more challenging than the first six, these lectures are more focused, delving into the most revolutionary discovery in twentieth-century physics: Einstein's Theory of Relativity. No single breakthrough in twentieth-century physics (with the possible exception of quantum mechanics) changed our view of the world more than that of Einstein's discovery of relativity. The notions that the flow of time is not a constant, that the mass of an object depends on its velocity, and that the speed of light is a constant no matter what the motion of the observer, at first seemed shocking to scientists and laymen alike. But, as Feynman shows so clearly and so entertainingly in the lectures chosen for this volume, these crazy notions are no mere dry principles of physics, but are things of beauty and elegance. No one -- not even Einstein himself -- explained these difficult, anti-intuitive concepts more clearly, or with more verve and gusto, than Richard Feynman.Binding Type: Paperback
Publisher: Basic Books
Published: 03/22/2011
ISBN: 9780465025268
Pages: 184
Weight: 0.35lbs
Size: 8.10h x 5.40w x 0.50d
Review Citations: Library Journal 03/01/2013 pg. 44
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4.1 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Well made and great fun for our Pittie
Size: 4.5"
My pittie loves these! They are way thicker than others. He has learned how to chew on the spikes. Seems like a good teeth cleaning too. Yes, the squeaker breaks! That is a great thing!! With his active chewing, that sound was driving us crazy after a while.
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Reviewed in the United States on February 19, 2026
★★★★★ 5
"Durable Fun: Pweituoet Heavy Duty Squeaky Dog Balls for Aggressive Chewers"
Size: 4.5"
Product Review:
The Pweituoet 4.5” Heavy Duty Squeaky Dog Balls have been a hit with my dog, proving to be both durable and entertaining.
Durability:
These dog balls are impressively tough. My dog is an aggressive chewer, and most toys don’t last long, but these balls have held up exceptionally well. The heavy-duty material and spiked design are perfect for dogs who love to chew, providing both durability and safety.
Entertainment:
The built-in squeaker adds an extra layer of fun. It captures my dog’s attention immediately, and the squeak keeps him engaged for longer play sessions. The spikes also make the ball easy for him to grip and carry around.
Size:
The 4.5” size is ideal for medium to large dogs. It’s large enough to avoid being a choking hazard but still easy for my dog to pick up and play with. The size and weight are just right for games of fetch, too.
Value:
Given the durability and how much my dog enjoys these balls, they offer great value for the price. They’ve lasted much longer than other toys we’ve tried, making them a worthwhile investment for any dog owner with a tough chewer.
Overall Verdict:
The Pweituoet Heavy Duty Squeaky Dog Balls are an excellent choice for medium to large dogs, especially those who are aggressive chewers. They’re durable, fun, and well-sized, making them a great addition to your dog’s toy collection. Highly recommended!
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Reviewed in the United States on August 10, 2024
★★★★★ 5
Actually stands up to use
Size: 4.5", Size: 4.5"
I have a pitbull who is a toy destroyer. All those toys, even the ones that say tough enough for destroyers, never hold up. THESE BALLS ARE AWESOME! I bought the 2 pack of the 4.5 inch balls and they lasted a year. I literally am writing this review after ordering a new set. These are well worth the money and Ghost (my dog) loves them. Hes a 103lbs pitbull and his life mission is cuddles and destroying his toys... and these lasting a year of everyday use is friggin awesome. Both toys failed in the same way eventually. They gave out in a circle around the "squeker".
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Reviewed in the United States on September 14, 2024
★★★★★ 3
Neutral
Size: 4.5"
She chewed it up in less than 10 minutes. This is not for heavy chewers but dogs that like to actually play with their toys it would be great!!! I gave it a 3 because it worked for my other dog who likes to play🤘
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Durable Fun for Chew-Happy Dogs
Size: Medium, Style: Squeaker
This dog ball has been a hit with my dogs, despite their tendency to chew through toys. These balls hold up surprisingly well given his chewing habits, which is why I keep coming back to them. They provide endless fun with their squeaky feature, keeping my dogs engaged and active.
One thing I really like is their durability. While my dogs do eventually chew them up, they last a significant amount of time compared to other toys we've tried. The squeaker adds an extra layer of excitement, making playtime even more enjoyable for my dog. However, if your dog is an aggressive chewer, be prepared for some wear, tear, and replacement over time.
The squeaker balls are worth it for the durability and entertainment they provide with the current price tag. They withstand a good amount of chewing, making them a reliable choice for medium breeds that love to play and chew. Just remember that they will not last forever.
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Reviewed in the United States on July 6, 2024