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The intensity level of an orchestra is 82 dB. A single violin achieves a level of 70 dB. How does the intensity of the sound of the full orchestra compare with that of the violin’s sound? In other words, find the ratio.
a hiker throws a stone from the upper edge of a vertical cliff. the stone's initial velocity is 25m/s directed at 40 degrees. with the face of the cliff. whats the height of the cliff?
A 0.20 kg billiard ball is thrown at a 45 degree angle upwards from the edge of a 12.192 meters tall building. What was the speed of the ball when it was launched
A grandfather clock has a weight at the bottom of the pendulum that can be moved up or down. If the clock is running slow, what should you do to adjust the time properly?
A 2.0 cm x 2.0 cm parallel-plate capacitor has a 3.0 mm spacing.The electric field strength inside the capacitor is 1.1 x105 V/m. How much charge is on each plate
Compute the force that acts on a square access hatch at the bottom of the tank that measures 0.25m by 0.25m.
With what minimum speed must you toss a 100 g ball II str aig ht up to just barely hit the I O-m-high ceiling of the gymnasium, With what speed does the ball hit the floor
A lightbulb has a resistance of 230?when operating with a potential difference of 180V across it. What is the current in the lightbulb?
6.95-kg bowling ball moving at 10.0 m/s collides with a 1.60-kg bowling pin, Calculate the final velocity (magnitude and direction) of the bowling ball
One kilogram of dry air is warmed from 20ºC to 70ºC under a constant pressure of 1atm. Calculate the change in internal energy
A police siren has a frequency of 550 Hz as the police car approaches you and a frequency of 450 Hz after it has passed you and receding, What is the true frequency of the police siren
A ball of mass 0.5 kg flies through the air at low speed, so that air resistance is negligible. What is the net force acting on the ball while it is in motion
A 0.600 kg ball falls directly down onto concrete, hitting it with a speed of 13.5 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
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