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A 0.45 V potential difference is maintained across a 1.3m length of tungsten wire that has a cross-sectional area of0.67 mm2 and the resistivity of the tungsten is 5.6 ×10−8 · m. What is the current in the wire?
An astronaut travels to the nearest start system. 10 light years away, and returns at a speed of 0.5c. How much has the astronaut aged relative to those people remaining on Earth?
q1. illustrate how the device equipped with an ultrasonic speaker a microphone and a precision timer might be used to
An AC generator supplies an rms voltage of 115 V at 50.0 Hz. It is connected in series with a 0.500 H inductor, What is the rms current through the resistor
The electric field inside a 28.41-cm-long copper wire is 0.021 V/m. What is the potential difference between the end of the wire
A wave has an amplitude of 0.25 m, a frequency of 5 Hz and a wavespeed of 4 m/s.a. Write the displacement equation for the wave
An incandescent lightbulb emits 97 W of radiation. If the filament is at a temperature of 2818 K, what is the area of the filament
A half-Atwood machine consists of a block of mass 4.0 kg on a table, connected by a string that passes over a pulley to a hanging mass of 5.0 kg. how fast is it moving after the hanging block has fallen 2.0m
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. what is the density of the liquid
A solid disk with m=60.0kg and a diameter of 48.0cm is to be turned from rest through 12.0 revolutions in 6.00s. Calculate the torque required to accomplish this
A ball is thrown upward from a platform 4.0 m high with a speed of 23 m/s at an angle of 37 o from the horizontal. What is the magnitude of its velocity when it hits the ground?
A 89.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.53 rad/s. Find the angular velocity of the platform with its load
question1a boat crosses a river of width 228 m in that the current has a uniform speed of 1.97 ms. the pilot maintains
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