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A 972 kg car is going 20 m/s and the driver has to slam on his brakes to prevent an accident. Assume that a total of 23.2 kg of iron in the brake pads and rotors absorb the heat produced by the friction between the brake pads and rotors. After the car has stopped, what is the change in temperature of the brake pads and rotors.
A planet orbits a star, in a year of length 2.77 x 107 s, in a nearly circular orbit of radius 3.38 x 1011 m. determine the angular speed of the planet
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil.
A 3000 flask is initially open while in a room containing air at 1 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, flask is opened and air is allowed to esc..
A diverging lens has a focal length of 71.5 cm. A real object is placed 30.9 cm in front of the lens. How far is the image located from the lens
If 11.6 g of gold is deposited on the negative electrode of an electrolytic cell in a period of 3.03 hours, then what is the current through the cell during this period
The immediate environment of a reactor contains a large flux of 10 MeV gamma rays. Resolve the thickness of lead required to reduce the intensity by a factor of 1012. Assume the mass absorption coefficient of Pb for 10 MeV photons is m/r = 0.06 cm..
A car rounds a banked curve. The radius of curvature of the road is R .the banking angle is a. the coefficient static friction is f.
A Wheatstone bridge is connected to a nine volt battery and is balanced when R1 = 6.3 k?, R2 = 3.3 k?, and R3 = 9.7354 k?
Two boats start together and race across a 64-km-wide lake and back. Boat A goes across at 64 km/h and returns at 64 km/h. Boat B goes across at 32 km/h, and its crew, realizing how far behind it is getting, returns at 96 km/h. Turnaround times ar..
A drinking fountain shoots water out from a height of 3.5cm above its basin. Determine the time a single drop spends in the air
A 3.0 m tall, 64 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
A 8.85- g bullet from a 9-mm pistol has a velocity of 376.0 m/s. what was the velocity of the bullet as it emerged from the block
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