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If the distance to a point source of sound is doubled, by what multiplicative factor does the intensity change?
The bullet becomes embedded in the block. If bullet-block system compresses the spring by a highest of 88.0 cm, what was the speed of the bullet at impact with the block.
A water heater consisting of a metal coil that is connected across the terminals of a 12-V power supply is able to heat 220 mL of water from room temperature (20°C) to boiling point in 50 s. What is the resistance of the coil? (When entering units, u..
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
A very thin wire, which follows a semicircular curve C of radius R, lies in the upper half of the x-y plane with its center at the origin. There is a constant current I flowing counter clockwise, starting upward from the end of the wire on the pos..
What is the coefficient of kinetic friction between the table and floor.
The electric field midway between two equal but opposite point charges is 939N/, What is the direction of the electric field, Calculate the magnitude of the electric field
When blue light of wavelength 465 nm illuminates a diffraction grating, it produces a 1st order utmost but no 2nd order maximum.
A glass bead (diamter of about 2 mm) has a total charge of +10 nC. A proton is located at a distance of 6 cm from the center of the glass bead. What is the magnitude of the force experienced by the proton
An experiment requires sound intensity 1.55 W/m2 at the distance of 3.61 m in any direction from a speaker. What total sound power is required
The simple harmonic motion of a 300 g mass on a spring is described by y = 20 cm sin(1.2566t). At t = 1/8 s what is the total energy
A baseball outfielder throws a 0.150-kg baseball at a speed of 40.4 m/s, What is the kinetic energy of the baseball at the highest point of its trajectory
A 0.280 kg ball is dropped from rest at a point 1.35m above the floor. The ball rebounds straight upward to a height of 0.780 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the flo..
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