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A stationary motion detector sends sound waves of frequency0.135 MHz toward a truck approaching at a speed of 49.2 m/s. What is the frequency of the waves reflected back to the detector? (Takethe speed of sound to be 343 m/s.)
A 9.0-V battery is connected to a bulb whose resistance is 2.7Ω. How many electrons leave the battery per minute
A merry-go-round starts from rest and reaches the angular speed of 4 rpm in the first two minutes. What would be the angular acceleration of the merry-go-round in rpm/min
A railroad flatcar of weight 7840 N can roll without friction along a straight horizontal track. What is the change in velocity of the car
An asteroid is headed towards a starbase. To try and avoid a collision, an explosive device is planted on the asteroid, Does the other piece of the asteroid hit the starbase
Consider two dipoles, p1, oriented along z at the origin, and p2 oriented along x at a distance r in the x-y plane. Given that the torque on a dipole in a field E can be written N=p cross E, find the torque on each dipole about its centre.
A student is ice fishing in Colorado on a frozen lake over spring break. He cuts a circular hole in the ice that has a diameter of 0.50 m. Find the mass of the ice cut out to make the hole
A 3.00-kg block starts from rest at the top of a 35.0° incline and slides 2.00 m down the incline in 1.50 s. Find the acceleration of the block. Find the coefficient of kinetic friction between the block and the incline.
Explain the physics fundamental process that causes the scope ,rod, pith ball, etc to discharge when you touch it. what is conservative force according to the text book of Giancoli
An oscillating LC circuit has a current amplitude of 8.00 mA, a potential amplitude of 250 mV, and a capacitance of 215 nF. What is the maximum energy stored in the capacitor
the magnetic field perpendicular to a circular coil of 5 turns and diameter 20cm changes from +1.85 T to -.25 T in 30 ms. Find the change in magnetic flux and induced emf
The syringe must be heated to high temperatures to sterilize it. When the syringe is at its maximum temperature, the number of oxygen molecules is 6.5 x 1019, what is the rms speed of the oxygen molecules
A ball is thrown horizontally from a height of 16.2 m and hits the ground with a speed that is three times its initial speed. What was the initial speed?
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