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1. At what separation is the electrostatic force between a +14.8 µC point charge and a +16.4 µC point charge equal in magnitude to 2.68 N?
A pole vaulter vaults over the bar and falls onto thick padding. He lands with a speed of 9.8m/s; the padding then brings him to a stop in a time of 0.40s. What is the average force on his body due to the padding during that time interval? Express..
Two balls are on a frictionless horizontal tabletop. Ball X initially moves at 10 meters per second, which angle and at what velocity will ball y move
When laser light of wavelength 633.4nm passes through a diffraction grating, the first bright spots occur at 17.8 degrees from the central maximum. At what angles do the third bright spots occur
A wedge of mass M and angle a slides freely on a horizontal plane. A particle of mass m moves freely on the wedge. Determine the motion of the particle as well as that of the wedge.
A girl pulls a sled with a force of 15 N over a distance of 3 m. What is the kinetic energy of the sled after she pulls it
Light of wavelength 600nm is incedent normally on a surface of area 4 cm^2. Determine the radiation pressure exerted upon the surface
A rescue plane spots a survivor 182 m directly below and releases an emergency kit with a parachute. how far away from the survivor will it hit the waves
What is the derivative of the transverse unit VECTOR, e(theta in subscript), with respect to time? i.e., de(theta)/dt? Derive the answer using the radial and transverse (polar) coordinate system.
The space shuttle is in a 250km -high circular orbit. It needs to reach a 700km -high circular orbit to catch the Hubble Space Telescope for repairs. How much energy is required to boost it to the new orbit
A box is being lowereed down a wall at a constant speed. A hand is pushing on the edge of the box with a 50N of force at a 45 degree angle with respect to the horizontal. The box weighs 40N. Find the coefficient of kinetic friction between the ..
Consider a one-dimensional random walk, on each step of which the state moves randomly to the left or to the right with equal probability. Show that after T steps of size , the state is likely to have moved only a distance about .
Venus has a mass of 4.0869*10^24 kg and a radius of 6,052 km. Calculate the acceleration due to gravity on Venus
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