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A three-legged wooden bar stool made out of solid Douglas firhas legs that are 2.5 cm in diameter. When a 70 kg man sits on thestool, by what percent does the length of the legs decrease? Assume, for simplicity, that the stool's legs are vertical and that each bears the same load.
Suppose that a NASCAR race car is moving tothe right with a constant velocity of +97 m/s. What is the averageacceleration of the car? Twelve seconds later,the car is halfway around the track and traveling in the oppositedirection with the same speed...
An initially stationary 2.0 kg object accelerates horizontally and uniformly to a speed of 9 m/s in 3.3 s. What is the instantaneous power due to that force at the end of the interval
How many moles of gas are in a balloon with a volume of 5.07 liters at a temperature of 298 K and a pressure of 1.11 atm
the tuner of a radio circuit is formed by a resistance of 400 ohms a 0.5 mh coil and a variable capacitor. if the
The angular momentum of a flywheel having a rotational inertia of 0.148 kg·m^2 about its central axis decreases from 6.70 to 0.560 kg·m^2/s in 3.50 s. How much work is done on the wheel
A 10.00kg box on a smooth, frictionless, horizontal surface experiences a downward force of 30n at an angle of 40 degrees to the horizontal. The box moves 1.50 m to the right. What was the work done by gravity.
a cable with 17.0 n of tension pulls straight up on a 1.10 kg block that is initially at rest. what is the blocks speed
Astronauts discover a planet orbiting another star. The mass of the star is 8.10 x 10^30 kg, what is the force exerted by the star on the planet
A wire carrying a 29.0 A current passes between the poles of a strong magnet perpendicular to its field and experiences a 2.17 N force on the 4.00 cm of wire in the field
An electric ceiling fan with blades of diameter 0.760m is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s. Through how many revolutions has the blade turned in this time interval
A golfer takes two putts to get his ball into the hole once he is on the green. What displacement would have been needed to get the ball into the hole on the first putt
question a carnot engine whose high-temperature reservoir is at 580 k takes in 520 j of heat at this temperature in
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