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A 0.5-kg rubber ball is dropped from rest a height H = 19.6 m above the surface of the Earth. It strikes the sidewalk below and rebounds up to a maximum height of 4.9 m. If the magnitude of the average force the sidewalk exerts on the ball during the collision is 73.5 N, how long (in s) was the ball in contact with the sidewalk?
A car's outside rear-view mirror is convex, with focal length -1.2m. What is it's apparent height, and what is its apparent location
A positive point charge Q1 = 2.8×10?5C is fixed at the origin of coordinates, and a negative charge Q2 = ?5.5×10?6C is fixed to the xaxis at x=+1.5m. Find the location of the place(s) along the x axis
Two 2.0-cm-diameter insulating spheres have a 6.00cm space between them. find the electric field strength at the midpoint between the two spheres
a person of mass 50 kg has a wavelength of 4.42 x 10^-36 m when running. how fast is she running
Two polarizing sheets are placed together with their transmission axes crossed so that no light is transmitted. A third sheet is inserted among them with its transmission axis at an angle of 38.0° with respect to the axis of the first sheet. Discover..
describe why pluto was demoted from the planet status. be sure to describe what class of planetoid it is considered now
A hot-air balloon plus cargo has a mass of 283 kg and a volume of 825 m3. What is the density of the hot air in the balloon
A 12 m long bar, when heated from 20 °C to 70 °C, becomes 12.008 m long. Calculate the linear expansion coefficient of that bar
A roller coaster starts from rest at the top of an 18m hill. The car travels to the bottom of the hill and continues up the next hill that is 10.0m high
hobbes pushes calvin on a sled which is traveling at a constant velocity on a flat field. the coeficient of kinetic
Which of following statements is correct
The drawing shows two situations in which charges are placed on thex and y axes. They are all located at the samedistance of 2.3 cm from the origin O. For each of the situations inthe drawing, determine the magnitude of the net electric field atthe o..
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