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In a crash test a car of mass 1,864 kg collides head on with a wall with speed 12.96 m/s in the -ve x direction. The collision lasts for 0.062 s. The car then bounces off the wall in the +ve x direction with speed 1.07 m/s. What is the average net force exerted on the car by the wall?
The displacement of a wave traveling in the positive x-direction is D(x,t)=(3.5cm)sin(2.7x?122t), where xis in m and t is in s. What is the frequency of this wave
Compute the force that acts on a square access hatch at the bottom of the tank that measures 0.25m by 0.25m.
A block of ice of mass 0.8 kg and initial temperature T = 0 C is placed in a sealed insulated container full of Helium gas, What is the mass of the liquid water
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 503nm, What is the intensity in (W/m^2) delivered to a rod
An air molecule is moving at a velocity of 444 m/s. How various meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
A rock climber stands on top of a 53{\rm m} -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0{\rm s} apart, What is the speed of the first stone as it hits the water
Water discharges from a horizontal pipe at the rate of 5.00 x 10-3 m3/s. At point A in the pipe where the cross-sectional area is 2.00 x 10-3 m2, What is the velocity of the water at point A
Two particles with charges +6e and -2e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 4.92 x 10-10 m apart. What is EPEfinal - EPEinitial, which is the change in the electric potent..
The nucleus of an atom of radium (mass 3.77 X 10-25 kg) suddenly ejects an alpha particle (mass 6.68 X 10-27 kg) of an energy of 7.26 X 10-16 J. What is the velocity of recoil of the nucleus
You have three resistors with values 3.7?, 2.8?, 5.1?, and a battery of 3.6V. You begin by connecting the three resistors in parallel, What is the magnitude of the current in the 2.8 resistor
how much tension must a cable withstand if it is used to accelerate a 20.0 kg car vertically upward at 0.70 m/s^2
A certain type of molecule has an excited energy states, plus the minimum energy ground state. what is the energy of the ground state
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