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An object of mass m undergoes an elastic collision with anidentical object that is at rest. The collision is not head-on. Show that the angle between the velocities of the two objects after the collision is 90o.
A carpenter is driving a nail into a board. The 1.25 kg hammer moves at 8.85 m/s when it strikes the nail. find the increase in temperature of the nail after 3 blows from the hammer
A microscope with a magnification of 1000 using a converging lens with a focal distance of 1.5 cm for the objective. The tube length given to you is 30 cm long. What should the focal distance of the eyepiece be if you want the eyes to be relaxed whil..
A Styrofoam box has a surface areaof 0.84 m2 and a wallthickness of 2.0 cm. find what is the thermal conductivity of the Styrofoam
A water tower supplies water through the plumbing in a house. A 2.54-cm-diameter faucet in the house can fill a cylindrical container with a diameter of 48 cm and a height of 32 cm in 12 s. How high above the faucet is the top of the water in the t..
Displacement d1 is in the yz plane 58.4° from the positive direction of the y axis, has a positive z component of 5.99 m, find the angle between d1 and d2
Four identical charges (+2.1 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A 750 g aluminum pan is removed from the stove and plunged into a sink filled with 10.0 liters of water at 20.0° C. What was the original temperature of the pan
the data represents the resistance R of a thermistor in Ohms as a function of tempeature T in kelvin make a graph of the natural logarithm of the resistance ln(R) versus the inverse of the temperature, 1/T and determine the constants Ro and B in R..
Consider the posiblity of making a LED from diamond by constructing a pn junction from a diamond doped with boron and a diamond doped with phosphorus. Estimate the wavelength of the light emitted.
A high-voltage transmission line with a resistance of 0.255 ?/km carries a current of 1.40 kA. The line is at a potential of 600 kV at the power station and carries the current to a city located 157 km from the power station. What is the power los..
A 0.35 kg cart traveling at 0.6 m/s to the right collides with a stationary 0.55 kg cart. After the collision the second cart (.55kg) is traveling to the right at 0.32 m/s, What is the speed and direction of the first(.35kg) cart
A converging lens with focal length of 11.8 cm is placed in contact with a diverging lens with a focal length of 21.1 cm. What is the focal length of the combination
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