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Q. An 80- quarterback jumps straight up in the air right before throwing a 0.430- football horizontally at 15. How fast will he be moving backward just after releasing the ball? How fast, will the quarterback be moving backward just after releasing the ball?
Q. Under favourable circumstances the human eye can detect 1.0e-18 J of electromagnetic energy. How many 600-nm photons does this represent?
An object with a net charge of 22 µC is placed in a uniform electric field of 600 N/C, directed vertically. What is the mass of object if it floats in this electric field.
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
Two charged dust particles exert a force of 4.20 x 10^-2 N on each other. What would be the force if they are moved so they are only one-eight as far apart.
The escape speed from a very small asteroid is only 26 m/s. If you throw a rock away from the asteroid at a speed of 39 m/s, what will be its final speed.
Find out the speed of a 56.7 kg thrill seeker at the bottom of the slide, assume no friction. If the thrill seeker has a speed of 24.1 m/s at the bottom, find out the change in mechanical energy due to friction.
A stone is projected at a cliff of height h with an initial speed of 45.0 m/s directed at an angle θ0 = 66.0° above the horizontal. The stone strikes at A, 5.37 s after launching. Find out (a) height h of the cliff, (b) speed of the stone just before..
For a damped oscillator with a mass of 350 g, a spring constant 59.00 N/m and a damping coefficient of 89 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 30 cycles.
Imagine there has been a drastic rise in food-borne illness in the city in which you live. The public lacks the knowledge about proper food safety to stop these problems and they also do not know how to find precise nutritional information to educ..
A 7 kg bowling ball moves at 2.15 m/s. How fast should a 2.40 g Ping-Pong ball move so that the two balls have the same kinetic energy.
find out the initial velocity of the ball. How fast will the electron be moving when it is very far away.
If the translation rms speed of the water vapor molecules in air is 703 m/s, what is the translational rms speed of the carbon dioxide molecules in the same air? Both gases are at the same temperature.
A curve of radius 35 m is banked for a design speed of 64 km/h. If the coefficient of static friction is 0.34 (wet pavement), at what range of speeds can a car safely make curve.
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