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A microwave oven generates a sound level of 37.3 dB when consuming 1.6 kW of power. Estimate the fraction of this power that is converted into the energy of sound waves. Assume the dimensions of the oven are 51.4 cm by 41.2 cm by 40.5 cm and the sound level is uniform over the outer surface.
Air at atmospheric pressure (101 KPa) is to be compressed to one-sixth of its original volume. At what pressure will the air be if its temperature is unchanged?
2 protons, each with charge q=1.602E-19 C, are fixed in space. They form a spherical nucleus with diameter 1E-15 m. Find electric potential energy for the electron in orbit
A circular-motion addict of mass 90 kg rides a Ferris wheel around in a verticalcircle of radius 10 m at a constant speed of 6.3 m/s. What is the period of the motion?
A solid disk of mass m1 = 9.3 kg and radius R = 0.23 m is rotating with a constant angular velocity of ? = 33 rad/s. find the initial angular momentum of the rod and disk system
A rod 20 cm long moves in a plane perpendicular to a magnetic field of 0.065 T. The velocity of the rod is perpendicular to its length. Find the speed of the rod if the potential difference between the ends is 6.9 V. ____________ m/s
You're carrying a 4.0-m-long, 25 poles to a construction site when you choose to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force should you exert to keep pole motionles..
A 3.10 kg steel ball strikes a wall with a speed of 10 m/s at an angle of 60 ° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.190 s, what is the average force exerted on the ball by th..
A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10×104 m/s2, what was the initial velocity of the ball
Estimate the boiling point of a 0.6 molal solution of NaCl in water, What is the osmotic pressure of a 100 mL of toluene solution that contains a total of .005 moles of a polymer dissolved in it at 25°C
A soccer ball is kicked with an initial speed of 30 m/s at an angle of 25 degrees with respect to the horizontal. Find the maximum height reached by the ball
The force component along the displacement varies with the magnitude of the displacement, as shown in the graph. Find the work done by the force in the interval from 0 to 0.1 m
An AC generator is to have a maximum output of 318 V. Each coil has an area of 0.145 m2 and a resistance of 15.7 ?, Find the maximum current induced in the coil
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