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The crate shown is held against wedge B by a spring. The spring is 96.0% of its original uncompressed length l=2.75m, and the spring constant is given as k=1450N/m. The coefficient of static friction at all contacting surfaces is?s=0.150. The mass of the crate is m=28.0kg .
The angle is ? 15.0?.Neglect the mass of the wedge. Assume the crate only moves in they direction and that wedge A cannot move.
Consider a model of a hydrogen atom in which an electron is in a circular orbit of radius = 5.79×10?11 around a stationary proton. What is the speed of the electron in its orbit?
When B-10 is bombarded by neutrons, a neutron can be absorbedand an alpha particle emitted. If the B-10 target isstationary the kinetic energy of the reaction products is equal to Kinetic energy of incident neutron
Two point charges of equal mass start from rest. What is the distance between the charges and How long will it take the charges to move
A 50 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 2.4 m. What speed does he need at the bottom
A positive charge q is placed at the origin. Identical charges Q are located at ±a on the x-axis. If the charge q is dispaced at a small distance x (much smaller than a) in either direction along the x-axis, find the period of SHM.
A gas at a temperature of 382 K, a pressure of 197 kPa and occupying a fixed volume of 0.38 m3, is heated so that the temperature of the gas rises by 34 K. What is the pressure of the heated gas? Give your answer in pascals.
A 120-N child is in a swing that is attached to ropes 2.20 m long. Find out the gravitational potential energy associated with the child relative to her lowest position at the following times.
A particle with a mass of 4.10 × 10-20 kg is oscillating with simple harmonic motion with a period of 2.9 × 10-5 s and a maximum speed of 2.3 × 103 m/s.
if a drage car had a constant acceleration throughout a quarter mile (402 m) race, what would be the top speed reached
Two automobiles are equipped with the same single frequency horn. What is the frequency the horns emit
Two insulated wires, each 2.94 m long, are taped together to form a two-wire unit that is 2.94 m long. One wire carries a current of 8.36 A, What is the current I
Two particles with Q1 = 50 µC and Q2 = 79 µC are initially separated by a distance of 2.4 m, What is the change in the electric potential energy
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