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A loose sun roof panel on an automobile is resting in place and is air-tight, but is unattached to the car because it is being repaired. The driver forgets, and drives onto the highway with the windows closed. If the rectangular sunroof panel has dimensions 40.0cm x 70.0cm, and a mass of 10.0kg, how fast must the driver travel on the highway for the roof to come off and fly away?
A 10-kg box is stationary on the ground and pushed by a downward force of 30 N. Calculate the supporting normal force acted on the box from the ground
The space shuttle is in a 250 km high circular orbit. it needs to reach 610 km high circular orbit to catch the hubble space telesope for repairs. how much energy is required to boost it to the new orbit
A 0.4 guitar string is vibrating in its fundamental frequency. The maximum acceleration of a point at the middle of the string is 8400m/s^2 amd the maximum velocity of that point is 3.80m/s. What is the amplitude of the wave? what is the wave speed..
a soccer ball is kicked at an angle of 62 degrees to the horizontal with an initial speed of 18 ms. assume for the
A dentist's drill starts from rest. After 2.70 s of constant angular acceleration it turns at a rate of 3.0 104 rev/min, Find the drill's angular acceleration
generator has a terminal voltage of 115 V when it delivers 18.0 A, alculate the emf (e m f) and the internal resistance (r) of the generator
a concrete block with a specific weight of 23.6 knm3 is suspended by a rope in a solution with a specific gravity of
You are a professional frontier re-enactor who specializes in making lead shot. To do this you put 1.3 kg of ice into 1.3 kg of water, both at 0 C, into an insulated bucket.
A point source is 180 cm below the surface of a body of a liquid (n = 1.33 ). Find the diameter (in meters) of the largest circle at the surface through which light can emerge from the liquid into the air
A 18.60 kg piece of zinc at 75 degrees Celsius is placed in a container of water. The water has a mass of 20 kg and has a temperature of 10.10 degrees Celsius before the zinc is added. What is the final temperature of water and zinc.
A 3.1 kg bundle starts up a 30° incline with 178 J of kinetic energy. How far will it slide up the incline if the coefficient of kinetic friction between bundle and incline is 0.30
question how many electrons must be removed from each of two 4.6-kg copper spheres to make the electric force of
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