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An aluminum block slides along a horizontal surface. The block has an initial speed of 11.0 m/s and an initial temperature of 10.7degrees C. The block eventually slides to rest due to friction. Assuming all the initial kinetic energy is converted to heat energy and all this energy stays in the block, what is the final temperature of the block? (Note: The specific heat of aluminium is 900 J/kg . K)
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. at what angle would this highway be directed
Unpolarized white light is incident on a po- larizer and then falls on an analyzer whose TA makes an angle of %u03B8 = 33.8%u25E6 with the polarizer, What is the fraction of the original light transmitted through both the polarizer and analyzer
What is the speed of a wave on a string that has a mass of 9.6 kg and a length of 7.2 m while a 7.0 kg mass is hanging from the end?
If the phase angle for a block-spring system in SHM is pi/6 rad and the block's position is given by x = xm cos(wt + pi). what is the ratio of the kinetic energy to the potential enery at time t = 0
The Youngs Modulus for copper is 130 Gpa. What is the strain in the the copper wire under a stress of 120Mpa
A steel wire of length 1.97 with circular cross section must stretch no more than 0.260 when a tensile (stretching) force of 400 is applied to each end of the wire. What is the minimum diameter necessary.
A proton is at the origin and an electron is at the point x = 0.45nm , y = 0.35nm. Find the electric force on the proton
A 7.8 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.63 T pointing up. What is the average induced emf in the coil
At its highest temperature, a space heater has a resistance of 19.5 ohm, find the average power output of the space heater
What are the velocities of the two people after the snowball is exchanged. What is the greatest kinetic energy of the electrons removed from the cathode by this light.
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. what are the underwater angles of refraction for the blue and red components of the light
find its velocity after the explosion. The man pulls the boy up to the tree limb C by walking backward at a constant speed of 1.1 m/s. find out the speed at which the boy is being lifted at the instant x_A = 4 {rm m}.
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