Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Textbook Question
Chapter 8, Problem 14A
Why is the Pelton Wheel an improvement over paddle wheels with flat blades?
Expert Solution & Answer
To determine
To Explain: Pelton wheel is an improvement over wheel with flat blades.
Explanation of Solution
Introduction:
Applying impulse on any object causes vector change in the linear momentum of that object in the same direction.
The curved Pelton wheel is more efficient because it makes incoming water bounce back over the impact with the paddle, which causes the increase in impulse.
Conclusion:
Hence, Pelton wheel causes increase in impulse which make it efficient as compare to the flat blades.
Chapter 8 Solutions
Conceptual Physics: The High School Physics Program
Ch. 8 - Distinguish between mass and momentum. Which is...Ch. 8 - a. Which has the greater mass, a heavy truck at...Ch. 8 - Distinguish between force and impulse.Ch. 8 - Distinguish between impact and impulse. Which...Ch. 8 - When the force of impact on an object is extended...Ch. 8 - Distinguish between impulse and momentum. Which is...Ch. 8 - Does impulse equal momentum, or a change in...Ch. 8 - For a constant force, suppose the duration of...Ch. 8 - In a car crash, why is it advantageous for an...Ch. 8 - If the time of impact in a collision is extended...
Ch. 8 - Why is it advantageous for a boxer to ride with...Ch. 8 - Visualize yourself on a skateboard. a. When you...Ch. 8 - Why is more impulse delivered during a collision...Ch. 8 - Why is the Pelton Wheel an improvement over paddle...Ch. 8 - In terms of momentum conservation, why does a...Ch. 8 - What does it mean to say that momentum is...Ch. 8 - Distinguish between an elastic and an inelastic...Ch. 8 - Imagine that you are hovering next to the space...Ch. 8 - Is momentum conserved for colliding objects that...Ch. 8 - The balls have different masses and speeds. Rank...Ch. 8 - Below are before-and-after pictures of a cars...Ch. 8 - Jogging Jake runs along a train flatcar that moves...Ch. 8 - Rick pushes crates starting at rest across a floor...Ch. 8 - Calculate the momentum of a 10-kg bowling ball...Ch. 8 - Calculate the momentum of a 50-kg carton that...Ch. 8 - Calculate the impulse when an average force of 10...Ch. 8 - Calculate the impulse when an average force of 10...Ch. 8 - A lunar vehicle is tested on Earth at a speed of...Ch. 8 - When you ride a bicycle at full speed and the bike...Ch. 8 - Can Andrew produce a net impulse on an automobile...Ch. 8 - Brian tries to jump from his canoe to the dock. He...Ch. 8 - Jason throws a ball horizontally while standing on...Ch. 8 - The example in the previous question can be...Ch. 8 - In the previous chapter, rocket propulsion was...Ch. 8 - In terms of impulse and momentum, why are air bags...Ch. 8 - Prob. 36ACh. 8 - When jumping from a significant height, why is it...Ch. 8 - In terms of impulse and momentum, why are nylon...Ch. 8 - Would it be a dangerous mistake for a bungee...Ch. 8 - When catching a foul ball at a baseball game, why...Ch. 8 - Why would it be a poor idea to have the back of...Ch. 8 - Prob. 42ACh. 8 - Why is it difficult for a firefighter to hold a...Ch. 8 - You cant throw a raw egg against a wall without...Ch. 8 - Why can Muhammad exert a greater punching force...Ch. 8 - Why do 6-ounce boxing gloves hit harder than...Ch. 8 - Suppose you roll a bowling ball into a pillow and...Ch. 8 - If you topple from your treehouse, you'll...Ch. 8 - If a fully loaded shopping cart and an empty one...Ch. 8 - A bug and the windshield of a fast-moving car...Ch. 8 - What difference in recoil would you expect in...Ch. 8 - A group of playful astronauts, each with a bag...Ch. 8 - A proton from an accelerator strikes an atom. An...Ch. 8 - Using units, show that kgm/s is equivalent to Ns.Ch. 8 - A 1000-kg car moving at 20 m/s slams into a...Ch. 8 - A car with a mass of 1000 kg moves at 20 m/s. What...Ch. 8 - A 2-kg blob of putty moving at 3 m/s slams into a...Ch. 8 - A 1-kg dart moving horizontally at 10 m/s strikes...Ch. 8 - Assume an 8-kg bowling ball moving at 2 m/s...Ch. 8 - Brakes are applied in bringing a 1200-kg car...Ch. 8 - A 20.0-kg mass moving at a speed of 3.0 m/s is...Ch. 8 - A 1-kg ostrich egg is thrown at 2 m/s at a bed...Ch. 8 - A railroad diesel engine weighs four times as much...Ch. 8 - A comic-strip superhero meets an asteroid in outer...Ch. 8 - A 5-kg fish swimming I m/s swallows an...
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