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In the final part of its life cycle a particular rotating spherical star expands to four times its normal diameter. Assume the mass remains constant, the mass is uniformly distributed before the expansion and the mass is uniformly distributed after the expansion. How is the period of rotation affected?
A sphere with radius 0.15m has density p that decreases with distance r from the center of the sphere according to p= 2.75*10^3 kg/m^3 - (9.5*10^3kg/m^4)r
An anchor shoots an arrow with a velocity of 45 m/s at the angle of 50 degrees with the horizontal.An assistant standing on the level ground 150 m downrange from the launch point throws an apple straight up into the air at th right time and speed ..
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
The magnetic field between the poles of an electromagnet is 2.17 T. A coil of wire is placed in this region so that the field is parallel to the axis of the coil. How many turns are there in the coil
In a 1.32T magnetic field directed vertically upward, a particle having a charge of magnitude 8.00?C and initially moving northward at 4.78km/s is deflected toward the east. What is the sign of the charge of this particle
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground when he slows down.
A 4kg cart is initially moving at 3m/s on a frictionless track. It then hits an incline and stops 2m later. what is the net work done on the cart
when jim abd rob ride bicycles, jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If rob takes 5.7 minutes to react the top, how much earlier s..
An air-track glider is attached to a spring. The glider is pulled to the right and released from rest at. It then oscillates with a period of 1.5 and the maximum speed of 32.
q1. in a head-on collision a car stops in 0.27 from a speed of 12. the driver has a mass of 76 and is fortunately
A 7.00 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. What is the force in each rope when the window washer stands 1.00 m from one end
q1. an audience of 2750 fills a concert hall of volume 35000 m3. if there were no ventilation by how much would
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