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A bomb, initially at rest, explodes into several pieces.
(a) Is linear momentum of the system (the bomb before the explosion, the pieces after the explosion) conserved?
(b) Is kinetic energy of the system conserved?
The length L of a closed tube is 0.8004 m. the temperature inthe lab room is 23.3 C. What is the fundamental frequency for the experimental setup
A 96 kg man walks along a 50 kg horizontal plank which is 4 m long. The plank is attached to a hinge mounted to one wall, and the far end is supported by a vertical wire which is attached to an anchor in the ceiling. The wire can just barely support ..
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. Assume that air friction will shorten the range by 34.1%. How far will the projectile travel in the horizontal direction, R?
What would be the electric current intercepted by the total surface area of the planet?
The gravitational potential energy U(r)of a mass mdue to a mass density ρ(r)satisfies ∇^2 U= 4πGmρ, whereGis the gravitational constant. If the earth is considered to be a uniform sphere of mass M, radius R, show that thegravitational potential en..
In a football game, a receiver is standing still, having justcaught a pass. Before he can move, a tackler, running at a velocityof +3.77 m/s, grabs him. The tackler holds onto the receiver, andthe two move off together with a velocity of +1.64 m/s. T..
A solar cell generates a potential difference of 0.400 V when a 150.0 ? resistor is connected across it, What is the emf of the cell
A cluster of galaxies has a radius of about 5.2 million light-years (4.9×10^22) and an intracluster medium with a temperature of (6.5×10^7) K. Estimate the mass of the cluster. Give the answer in both kilograms and solar masses. Suppose combined l..
question a 65-kg person jumps from a window to a fire net 18m below which stretches the net 1.1m. assume that the net
A torque of 175 lb ft is needed to free a large rusted on nut. The length of the wrench is 1.10 ft. What force, in pounds, must be applied to free it?
The frequency of a pendulum is 39 percent less when onthe surface of Mars than when on the earth's surface. Use this factto calculate the acceleration of gravity on Mars.
Initially, the translational rms speed of a molecule of an ideal gas is 460 m/s. The pressure and volume of this gas are kept constant, find the final translational rms speed of the molecules
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