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a superball with mass equal to 50 grams is dropped from a height of 1.5m . It collides with a table, then bounces up to a height of 1m . The duration of the collision (the time during which the superball is in contact with the table) is 15ms . In this problem, take the positive y direction to be upward, and use for the magnitude of the acceleration due to gravity 9.8. Neglect air resistance. Find the y component of the momentum of the ball immediately before the collision?
A thin glass rod is submerged in oil. What is the critical angle for light traveling inside the rod? what is the refractive index of oil and glass
A car crashes into a wall at 25 m/s and its contents are brought to rest in 0.1s. display that the average force exerted on a 75-kg test dummy by the seat belt is more than 18,000 N.
A gymnast with mass m1 = 43 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 108 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
A charge Q is located inside a rectangular box. The electric flux through each of the six surfaces of the box is, What is Q
Calculate the intensity distribution
A point charge Q is located at the center of a very thin, spherical metal shell. what is the electric potential of the shell
Each of two small non-conducting spheres is charged positively, the combined charge being 40 mC. Determine the magnitude of the smaller of the two charges
assume you would enter a vacuum chamber (on Earth), that is, a chamber with no air in it. Inside this chamber, if you dropped a hammer and a feather from the same height at the same time, both would hit the bottom at the same time.
A car is driven 125.0 km west and then 65.0 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
What is the force of gravity between two 1000-kg cars separated by a distance of 25m on a interstate
you are a fighter pilot in your jet. you are moving at 1000 km/h when you go into a climb in order to avoid a HUGE UFO. What is the radius of the circular arc
a heat engine operates between a hih temp reservoir at 610K and low temp reservoir at 320K. find the net change in entropy as a result of this cycle
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