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A massless, rigid board is placed across two bathroom scales that are separated by a distance of 1.74 m. A person lies on the board. The scale under his head reads 474 N, and the scale under his feet reads 327 N.
(a) Find the weight of the person.
(b) Locate the center of gravity of the person relative to the scale beneath his head.
If the contact time between bat and ball is 2.80×10?3s , calculate the average force between the ball and bat during contact
At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire?
At a point P, the path lengths from two point sound wave sources have a difference of 1/4 l. What is the phase difference between the sound waves at poiunt P
Two capacitors, C1 = 4.0mF and C2 = 9.0mF , are in series, Find the potential difference across second capacitor and Find the charge stored on the second capacitor
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.30 kg wrench from 3.50 m above the ground, What is the mass of the planet
What is the period of oscillation of the scale? State your reply numerically in seconds.
A series RCL circuit contains a 4.99-µF capacitor and a generator whose voltage is 11.6 V. At a resonant frequency of 1.20 kHz the power delivered to the circuit is 24.1 W. Find the value of the inductance
A charge of -2.95 µC is fixed at the center of a compass, What are the magnitude and direction of the net electrostatic force acting on the charge at the center
A parallel beam of light containing red (660 nm) and blue (470 nm) wavelengths goes from polystyrene to water, What is the angle between the two colors in water
A rectangular loop of wire with width 0.4 cm and length 0.6 cm is oriented with the normal to the face of the loop, Find the magnetic flux through the loop
A 5 m x 12 m swimming pool slopes linearly from a 1.20 m depth at one end to a 3.40 m depth at the other. What is the mass of water in pool.
A certain laser emits light in a narrow band of wavelengths centered at 632.7 nm and with a ''wavelength width'', What is the corresponding ''frequency width'' in hertz for the emission
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