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Police lieutenants, examining the scene of an accident involvingtwo cars, measure the skid marks of one of the cars, which nearlycame to a stop before colliding, to be 76m long. The coefficient of kinetic friction between rubber and the pavement is about 0.60. Estimate the initial speed of that car assuming a level road.
an l-r-c circuit has an inductance of 0.480 h a capacitance of 2.60times10-5 f and a resistance of r.a what is the
A pair of closely spaced square conducting plates measure12 cm on a side. The electric field energydensity between the plates is 4.3kJ/m3. What is the charge on the plates?
Suppose you wish to survey 16000 square degrees of the sky to some limiting brightness as fast as possible, but necessarily within some budgetary constraints. Further suppose that the cost of telescopes ~ (diameter of the primary mirror)2.5 and th..
A transformer steps up the 120 V rms AC power line voltage to 23 kV rms for a TV picture tube. what is the secondary current
A solid sphere with a radius of 75 mm rolls (without slipping#) down from rest along an inclined plane that is 5 m long. What angle does the plane make with the horizontal
a rocket initially at rest on the ground accelerates straight upward from rest with constant acceleration 29.4 ms2. the
A spy satellite was launched into a circular orbit with a height of 318 km above the surface of the Earth. Determine its orbital speed and period
A parachutist with a camera descends in free fall at a speed of 11 m/s. The parachutist releases the camera at an altitude of 100 m. How long does it take the camera to reach the ground
Calculate the absorbed dose in Gy to the skin of a person which receives 1500 ergs/gm of beta radiation from a cloud of radioactive krypton-85 gas.
The ropes in the figure are each wrapped around a cylinder, and the two cylinders are fastened together. What is the angular acceleration of the cylinders
A copper block is removed from a 310 C oven and dropped into 1.10 kg of water at 20.5 C. What is the mass of the copper block
A 6 kg bowling ball with a radius of 12 cm rolls in a straight line past you at a speed of 3 m/s. What are the components of the ball's total angular momentum about your position
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