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An engine moves a boat throughthe water at a constant speed of 15 m/s. Theengine must exert a force of 6.0 kN to balance the force that the water exerts against the hull. What power does the engine develop?
You may solve this problem using either tabulated values from the tables or constant specific heats. Calculate the rate of heat addition
To charged dust particles exert a force of 3.2 * 10-2N on each other. What will be the force if they are moved so they are only 1/8 as far apart?
A certain lightbulb has a tungsten filament with a resistance of 20.5 ? when at 20.0°C and 136 ? when hot. Find the temperature of the hot filament
A patient has a near point of 45.0 cm and far point of 85.0 cm. Calculate the power lens needed to correct the patient's far point
A disk rotates about its central axis starting from rest at t = 0 and accelerates with constant angular acceleration. what is the time required to complete 64 revolutions
a uniform solid sphere of radius 0.491 m and mass 14.0 kg turns counterclockwise about a vertical axis through its
A line of charge with uniform density of 32.0 nC/m lies along the line y = -15.0 cm, Find the electric field it creates at the origin
Ball 1, with a mass of 120g and traveling at 15m/s , collides head on with ball 2, which has a mass of 330g and is initially at rest. What are the final velocities of each ball if the collision is perfectly inelastic? (Vfx)1? (Vfx)2
Waves on a 10 meter rope travel at 20 m/s. You shake the rope back and forth until you get a standing wave with a single antinode, What is the wavelength and frequency of each standing wave
A box is hanging from a chain having a mass of 60 kg. The box has a mass of 78 kg. Find the tension in the top of chain and the bottom of the chain.
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
A plucked guitar string produces a sound wave of frequency 440 Hz. (a) What is the wavelength of the sound wave (assume the speed of sound in air is 340 m/s)? (b) How much time elapses between the impacts of two adjacent compression on your eardru..
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