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A key falls from a bridge that is 49 m above the water. It falls directly into a model boat, moving with constant velocity , that is 14 m from the point of impact when the key is released. What is the speed of the boat?
A 2.9cm --diameter parallel-plate capacitor has a 1.6mm spacing. The electric field strength inside the capacitor is 8.0×104 V/m. How much charge is on each plate
A block of unknown mass is attached to a spring of spring constant 6.1 N/m and undergoes simple harmonic motion with an amplitude of 9.5 cm. Calculate the mass of the block
In the final part of its life cycle a particular rotating spherical star expands to four times its normal diameter. How is the period of rotation affected
A 75-kg man is riding in a 75-kg cart at 1.0 m/s. He jumps off in such a way as to land on the ground with no horizontal velocity
A ray of light strikes the midpoint of one face of an equiangular (60°-60°-60°) glass prism (n = 1.5) at an angle of incidence of 32.5°. Trace the path of the light ray through the glass, and find the angles of incidence and refraction at each surfa..
An ice skater is gliding horizontally across the ice with an initial velocity of +7.77 m/s. How much time elapses before her velocity is reduced to +3.00 m/s
Calculate the irradiance on earth due to radiation from the sun
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
A 48 kg cart is moving across a frictionless floor at 1.5 m/s. A 68 kg boy, riding in the cart, jumps off the cart so that he hits the floor with zero velocity. What is the velocity of the cart after the boy jumped
questionsome of properties of a diatomic molecule no can be described in terms of a effortless model in which two atoms
The position of a particle moving along an x axis is given by x = 14.0t2 - 3.00t3, where x is in meters and t is in seconds. find the maximum positive velocity reached by the particle
A fish at a depth of 30 m is neutrally buoyant, What fraction of the original number of air molecules that were in the air bladder remains when the fish is at the surface
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