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A driver involved in an accident claims he was going only 42 MPH. When police tested his car, they found that when his brakes were applied at 42 MPH, the car skidded 160 feet before coming to a stop. However, the driver's skid marks at the accident scene measured 210 feet. Assuming the same constant deceleration, determine the speed he was actually travelling just prior to the accident?
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 7.70 cm. If the cork is 13.5 m from shore, how long does it take a ripple passing the cork to reach the shore? _____s
A 2.50-kg block slides on a horizontal surface with coefficient of kinetic friction 0.310. It is moving at 5.45 m/s, Find the distance of compression
Two small spheres of equal mass m are suspended from strings of length L. When the two spheres are each given an equal charge q they separate by a distance x, swinging out an angle theta from the vertical
A 199.9 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
An open-topped freight car with mass 24000 is coasting without friction along a level track. Since the rain is falling downward, how is it able to affect the horizontal motion of the car
At what angle should the road be banked. The charge on the inner shell is 4.59 x 10- 8 C and that on the outer shell is 2.15 x 10- 8 C. Find out the electric field (in N/C) (a) at r = 12.7 cm and (b) at r = 37.3 cm.
13 cars in a circle at a boom box competition produce a 110 dB sound level at the center of the circle. What is the average sound level produced there by each
A venturi is constructed of a 9.0 cm diameter pipe with a 2.0 cm diameter throat. What is the pressure in the throat
Suppose a star with radius 8.30 108 m has a peak wavelength of 684 nm in the spectrum of its emitted radiation. Find the energy of a photon with this wavelength.
An object is 5 cm from an equi-convex lens of focal length f=15 cm, What is the position of the image
A projectile of 1.04-kg mass approaches a stationary body of 5.24 kg at 15.0 m/s, What is the speed of the 5.24-kg body after the collision
A bicyclist is traveling at a speed of 20 m/s as he approaches the bottom of hill. Determine the vertical height of the hill
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