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The volume control on a stereo amplifier is adjusted so the sound intensity level increases from 23 to 61 dB. What is the ratio of the final sound intensity to the original sound intensity?
Transverse waves with a speed of 43.0 m/s are to be produced on a stretched string. A 5.40-m length of string with a total mass of 0.0600 kg is used. (a) What is the required tension in the string? N (b) Calculate the wave speed in the string if the ..
Your adventurous friend Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. WHat is her height above the river at her lowest point
question1the distance between an object and its image is fixed at 40.0 cm. a converging lens of focal length f 6.53 cm
a box slides down a rough 50o incline with a coefficient of kinetic friction between the box and incline of 0.8. at a
A UFO lowers a 278kg stairway of length 5.29 m from under its belly until it is fully extended at an angle of 54 degree. What is the tension in the cable
A particular engine has a power output of 4.00 kW and an efficiency of 22.0%. Assume the engine expels 8500 J of energy in each cycle. Find the energy absorbed in each cycle
Two isotropic point sources of light (S1 andS2) are separated by a distance d = 250μm along a yaxis and emit in phase at wavelength 841nm and at the sameamplitude. A light detector is located at point P at coordinatexp on the x axis.
A solid, insulating sphere of radius a = 2 cm has a total charge Q = 10 nC which is uniformly distributed. Using Gauss's Law decide the magnitude of the electric field at a point inside sphere which is 1 cm from its center.
What is the angle of incidence in air of a light ray whose angle of refraction in glass is half the angle of incidence? Assume the refractive index of glass is 1.50
The blood flow speed through an aorta with a radius of 1.00 cm is 0.365 m/s, If aorta constricts to a radius of 0.800 cm, how much does blood flow speed increase
A person drops a cylindrical steel bar (Y = 2.00 × 1011 Pa) from a height of 3.30 m (distance between the floor and the bottom of the vertically oriented bar). what is the maximum compression of the bar
At each of the designated points, rotate the given vector to indicate the direction of the force exerted by the water on either the inside of fishbowl (for points A and B) or the outside of the goldfish (for points C, D, and E).
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