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Two firecrackers explode at the same place in a rest frame with a time separation of 20 s in that frame.
Find the time between explosions according to classical physics, as measured in a frame moving with a speed 0.7 c with respect to the rest frame.
An induced emf of 12V is produced when a 350 loop coil, ofradius 4.2cm , is placed perpendictular to a megnetic fieldand turn 90deg in 0.08s. Calculate the intensity of the magnetic field
A man is pulling his box that has a mass of 22 kg. What is the work done on the luggage by the lady, What is the power exerted on the box by the man
A monkey shows symptoms of being under the influence of too much physics. Specifically, What is the final angular speed of the monkey's head
It is desired to construct a solenoid that will have a resistance of 5.60 (at 20°C) and produce a magnetic field of 4.00 multiplied by 10-2 T at its center when it carries a current of 3.60 A. calculate the length the solenoid should have
suppose after the ball reaches the ground ,it bounces back straight upwards at the speed of half of the speed that it hits the ground, calculate the maximum height that the ball bounces
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.58 m, Calculate the power emitted by the human body
A patient walks across a force platform and the forces exerted by the patients foot during a step is recorded. What is the direction of the resultant force
A 100kg box slides down a ramp that has 60.0degrees slope. The coefficient of kinetic friction between the box and the ramp is 0.250. What is the work done by the gravitational force
We compared two cases: single phase delivery (call the wasted power P1), and 2-phase delivery (P2), Find the ratio P1/P2 when load 1 = 3.1 A, load 2 = 7.4 A, and each delivery wire has a resistance of 0.25 ohm
Design an audio amplifier using a JFET and a 20-volt power supply. The amplifier is to have a gain of 50
A 28.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
A solenoid of length 5.0 cm and diameter 0.87 cm is wound with 162 turns per cm. The current is decreasing at a rate of 38.0 A/s. What is the induced emf in the entire solenoid
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