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A sound wave, traveling at 357 meter per second, is emitted by the foghorn of a tugboat. An echo is heard 1.73 second later. Determine how far away is the reflecting object?
Answer in units of m
A man enters a tall tower, needing to know its height. If this pendulum is taken to the Moon, where the free-fallacceleration is 1.67 m/s2, what is the period there
the current density in a 2.8 μm thick x 75 μm wide gold long film is 750,000 A/m^2. The current flows along the length of the film. Calculate what is the current in the film
A 0.052 kg mass oscillates on a spring with a frequency of 8.2 Hz and an amplitude of 0.025 m. What is the maximum acceleration during an oscillation
An earth satellite moves in a circular orbit with an orbital speed of 6300. Find the time of one revolution of the satellite
A transformer with a turns ratio (secondary:primary) of 1:81 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. What is the voltage supplied to the recharger? V
A Martian leaves Mars in a spaceship that is heading to Venus. On the way, the spaceship passes earth with a speed v = 0.86c relative to it. What is the time of the trip (in seconds) as measured by the Martian
An image of a 5 centimeter tall object is formed on a screen 20 centimeter away from a thin lens. Obtain how far away from the lens is the object
A 0.800 m long solenoid is formed by wrapping 740 turns of wire around a hollow cylinder with a radius of 0.160 m. calculate the energy stored in the field
intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave. the frequency of
A house has a floor area of 200 m2 and an outsidewall that has an area of 50.0 m2. The earth's magneticfield here has a horizontal component of 2.65E-5 T that points duenorth and a vertical component of 4.22E-5 T that points straightdown, toward t..
A sledge loaded with bricks has a total mass of 17.0 kg and is pulled at constant speed by a rope. What is the increase in internal energy in the sledge and the surface due to friction
At the instant the car begins to accelerate, a truck with a constant velocity of 21 m/s passes in the next lane. Explain how far will the car travel before it overtakes the truck?
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