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A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K, what is the specific heat of the substance?
A wheel spins on its axis with a angular velocity of 2 rad/s. Find how long will it take to get the angular velocity up to 8 rad/s
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is twenty-eight times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites
Calculate the cross-section for the scattering of a 10MeV α-particle by a gold nucleus (Z=79, A=197) through an angle greater than 10, 20, and 30 degrees.
Two sinusoidal waves, identical except for phase, travel in thesame direction along a string producing a net wavey'(x, t) = (4.0 mm) sin(24x - 4.0t + 0.800 rad), What is the phase difference between them
An amusement ride consists of a car moving in a vertical circleon the end of a rigid boom. The radius of the circle is 10 meter.The combined weight of the car and riders is 5.0 kNewton. At thetop of the circle the car has a speed of 5.0 m/s.
For safety, the National Electrical Code limits the allowable amount of current which such a wire may carry. Find how much power would be dissipated in the wire, when carrying the maximum allowable current
A single-turn circular loop of radius 8.00 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7G directed at 70 below the horizontal north direction. Find out the current in the loop.
A pail of water is rotated in a vertical circle of radius 0.70 m. What is the minimum speed of the pail at the top of the circle ifno water is to spill out
An explorer is caught in a whiteout (in which the snowfall is thus thick that the ground cannot be distinguished from the sky) while returning to base camp. Obtain how far must he now travel to reach base camp
A parallel-plate capacitor has 2 cm x 2 cm electrodes with surface densities +- (plus and minus) 1 x 10-6 C/m2. By what distance has the proton been deflected sideways when it reaches the far edge of the capacitor
The water comes out of the heads at an angle of 35o to the horizontal and covers a radius of 7.0 m. What is the velocity of the water coming out of each sprinkler head
A charge of 0.43 C is spread uniformly throughout a 36 cm rod of radius 7 mm. What are the volume and linear charge densities?
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