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A skier of mass 70 kg is pulled up a slope by a motor drivencable.
(a) How much work is required to pull him 60m up a 30 degreeslope (assumed frictionless) at a constant speed of 2.0 m/s ?
(b) What power must a motor have to perform this task?
The critical angle for total internal reflection for glycerine surrounded by air is 42.9°. Calculate the index of refraction of the substance
A student has two ramps, both of which are at an angle 32°. Ramp 1 is frictionless and ramp 2 has friction. The student also has two blocks, one for each ramp.
A simple magnifying glass can focus sunlight enough to heat up paper or dry grass and start a fire. what is the intensity of the image of the Sun
An isolated conductor of arbitrary shape has a net charge of +1.20×10-5 C. Inside the conductor is a cavity within which is a point charge q = +3.60×10-6 C.
That is the sound from the organ bounces back and forth off the church walls many times before the sound inentsity decays away completely. If the reverberation time is 10s and the church has the approximate shape
During a game of football, the ball is kicked by the punter with a speed of 20m/s at an angle of 40 degrees above the horizontal. A player on the other team, standing 50m away, starts running to catch the ball immediately after it is kicked. ASsu..
A vector has an x-component of -21.5 units and a y-component of 35.0 units. Find the magnitude and direction of the vector
A ray of light passing through air is incident on a piece of quartz (n=1.46) at an angle of 25 degrees. Calculate the deviation d of the ray as it emerges back into the air
provide step by step process used to reach solutions.a 5600 kg mass car is taking a turn at 72 ms. if the frictional
Determine the magnitude of the force on an electron traveling 4.15×105m/s horizontally to the east in a vertically upward magnetic field of strength 0.37T
One solenoid is centered inside another. The outer one has a length of 47.0cm and contains 6600 coils, compute the emf induced in the inner solenoid
A 2.0 cm tall candle flame is 1.8 cm from a wall. You happen to have a lens with a focal length of 36 cm . 1. How many places can you put the lens
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