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A 221 kilogram log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.3 degree with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.909, and the log has an acceleration of 0.831 m/s2. Compute what the tension in rope.
The eye is a multiple lens system, but can be thought of as a single lens system for the purpose of this discussion. What is the effective focal length of the eye
a physicist has developed a device that generates a beam of alpha particles each of which is a helium nucleus
a variable capacitor in a circuit with a 120v, 60-Hz source initially has a capacitance of .25uf. The capacitance is then increased to .4uf. What is the percentage change in the current in the circuit
The middle C string on a piano is under a tension of 908 N. The period and wavelength of a wave on this string are 3.82 ms and 1.17 m, Find the linear density of the string
A hydrogen atom is in the 2s state. Determine the principal quantum number and the energy of the state
A 0.23kg block oscillates between two 19N/m springs. What's the oscillation period
question apparent weight a 550-n physics student stands on a bathroom scale in an 850-kg including the student elevator
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 45:1. Find the power consumed by the air filter
a charge q1 5 nc is placed at x 0 and another charge q2 -2 nc is placed at x 2 .0 cm. where should a third positive
A ball m=1kg rolling without slipping on a flat surface with v=.1m/s strikes the wall after which v=.08m/s. What is the amount of heat generated due to impact?
One goal of the Russian space program is to illuminate dark northern cities by sunlight reflected to the Earth from a 200 m diameter mirrored surface in orbit. Some smaller prototypes have already been constructed and put into orbit.
An advertisement shows a 1239 kg car slowly pulling at constant speed a large passenger airplane to demonstrate the power of its newly-designed 79.7 hp (horsepower) engine. How much work is performed by the car on the airplane during this time
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