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1.) A 14kg motor is mounted on rubber feet. The motor can be pulled aside a distance of .5cmby a force of 200N.
(a) Find the spring constant for the sideways motion of the motor.
(b) What is the natural frequency for sideways vibration of the motor?
(c) The motor is to rotate the drum of an electric dryer by means of a belt connected to a pulley. If the driven pulley is to rotate at 9 rev/s, is trouble likely to result? Why?
2.) A heavy weight hangs at the end of a 140m cable. A worker strikes the top of the cable sideways, the pulse hits the weight after a time of 4 s.
(a) With about what frequency must he vibrate the top end if the rope is to resonate in its fundamental?
(b) It's first overtone?
(c) Why is your answer only approximate?
consider a horizontal parallel plate capactor where the size of the plates is much larger than the spacing between the
A baseball player hits a home run and the ball lands in the left field seats, 7.6 meter above the point at which the ball was hit. Determine the initial velocity of the ball when the ball leaves the bat
Monochromatic light falling on two slits 1.9×10?2mm apart produces the fifth-order fringe at an 8.9? angle
A satellite of mass 190 kg is placed into Earth orbit at a height of 600 km above the surface. how long does the satellite take to complete one orbit
Two converging lens of 15 cm focal length each are separated by 38 cm. If an object is placed 40cm in front of the first lens, find the magnification of the lens system
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An electron gun in an old television picture tube is a device that uses an electric field to accelerate electrons. What magnitude of electric field is needed to accelerate an electron from rest to a speed of 4.0x10^7 m/s in a distance of .01m.
A thin gold ring of radius 1.02 cm carries a uniform charge per unit length of 1.02e-14 C/m. Find the electric field on the axis of the ring 1.09 cm from the center magnitude.
A trough is 10 meters long, 3 meters wide, and 1 meters deep. Find the amount of work in joules required to empty the trough by pumping the water over the top
A 5.06 10-5 H solenoid is constructed by wrapping 63 turns of wire around a cylinder with a cross-sectional area of 9.70 10-4 m2 , Determine the change in the length of the solenoid
If 7.50 kg of ice at -5.00°C is added to 12.0 kg of water at 15°C, compute the final temperature. T = 0 C, How much ice remains, if any
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