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Water ripples are produced by making a cork oscillate up and down at a frequency of 5 Hz. The peaks of the ripples are 0.03 meters apart. What is the period of the water ripples?
A rocket, away from all gravitational forces, accelerates upward at an acceleration of 12.8m/s^2. On its main deck is a crate with a mass of 81.6kg. How many forces act on the crate
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an open window that has area 0.300 m2. At the window, How much energy does this wave carry through the window
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the speed of the ball 0.8 seconds after it was kicked, What is the maximum height the ball goes above the ground
A migrating bird is initially flying south at 10 m/s. To avoid hitting a high-rise building, What is the bird's average acceleration during this 2 s interval
A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.793 m and 2.97 kg, what is its rotational kinetic energy
An inductor used in a dc power supply has an inductance of 13.0 H and a resistance of 230 Omega. It carries a current of 0.210 A. What is the energy stored in the magnetic field? At what rate is thermal energy developed in the inductor? Does your rep..
A 60kg student carrying a 5.0kg school bag walks up to flights of stairs in 30 seconds to reach the library. How much power did the student generate
a parachutist with a camera descends in free fall At a speed of 14m/s. What is the velocity of the camera just before it hits the ground
If 5.0 ´ 1021 electrons pass through a 20-W resistor in 10 min, what is the potential difference across the resistor
A 300-kg elevator is raised with a constant speed through a vertical distance of 100 m in two minutes. What is the useful output power of the hoist
A 12-V battery causes a current of 0.80A through a resistor, How many joules of energy does the battery lose in a minute
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