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1. A 1100kg automobile travels at 80km/h .
Part A What is its kinetic energy?
Part B What net work would be required to bring it to a stop?
If 20 grams of hot water at 80 C is poured into a cavity in a very large block of ice at 0 C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temperature.
A 230g baseball is pitched at 42m/s spinning at 40rad/s . You can treat the baseball as a uniform solid sphere of radius 4.0cm
A resistor with resistance 14M? is connected in series with a capacitor with capacitance 1.0?F and a battery with emf 13.5.0V. what is the time constant
Calculate the flow rate in cubic centimeters per second in an aorta of radius 60 cm if the average blood velocity in it is 0.81 cm/s
A trapeze artist swings in simple harmonic motion with a period of 4.2s. The acceleration of gravity is 9.81m/s2. Compute the length of the cables supporting the trapeze.
What is the potential energy of the elevator
A point charge with q1 = +1.9 C is located at x = ?3.0 m, y = 0, and a second point charge with q2 = +6.5 C is at x = +1.0 m, y = +2.0 m. (a) What is the force exerted by q1 on q2? magnitude N direction ° counterclockwise from the +x-axis (b) What..
At its Ames Research Center, NASA uses its large "20-G" centrifuge to test the effects of very large accelerations (hypergravity) on test pilots and astronauts. In this device, an arm 8.84m long rotates about one end in a horizontal plane, and the..
A copper ball with a radius of 1.5cm is heated until its diameter has increased by 0.17mm .Assuming an initial temperature of 21?C
Calculating plants maximum possible thermal and actual efficiency.
An electron is shot upward directly perpendicular to the lower plate of a parallel plate capacitor. Its initial velocity is 3.0 x 104 m/s. What must be the potential of the upper plate if the electron stops just before reaching it? The lower plate..
A copper rod (length=2 m, radius=3×10-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a "spring," and the object oscillates vertically with small amplitude. Ignoring the rod's mass, determ..
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