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A boy throws a ball at an angle of 45 degrees from ground. Wind is blowing in horizontally opposite side. The ball comes back in the hands of the boy. What is the trajectory of the ball?
A uniform conducting rod of length 28 cm has a potential difference across its ends equal to 13 mV (millivolts). What is the magnitude of the electric field inside the conductor
A train slows from 40m/s to 10m/s in 3 seconds . If its mass is 50000kg what was the change in momentum? What was the train's impulse
A string passing over a pulley has a 3.90 kilogram mass hanging from one end and a 2.60 kilogram mass hanging from the other end. determine what would be the acceleration of the two masses
Assume that a cloudy parcel has T = 275 K, wl = 1.5 g/kg. The background atmosphere has T = 274 K, and a relative humidity of 0.6. Assume a total pressure p = 600 hPa. What is the total density of the air in the cloud (due to dry air, water vapor..
Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.
An astronomical telescope uses an objective power +2.00 D. If the length of the telescope is 52 cm, what is the focal length of the eyepiece
A football player with a mass of 89 kg and a speed of 2.1 m/s collides head-on with a player from the opposing team whose mass is 120 kg. Find the speed of the second player
a wire carrying a current is placed in a uniform magnetic field. When a current of 3.7A flows in the wire there is a force of 0,075N on each 18cm of wire in the field
Explain how much distance is between you and the deer when you come to a stop? What is the maximum speed you could have and still not hit the deer?
A cacher catches a 145 g baseball traveling horizontally at 34 m/s, How large an impulse does the ball give it to the catcher
A diatomic molecule is excited to its first rotational energy level, corresponding to J = 1. what is the angular speed of the molecule about its center of mass
A meter stick is supported on a fulcrum at the 21 cm mark. A 0.80 kg object is hung from the zero end of the meter stick, What is the mass of the meter stick
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