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A rock of mass 48 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 258 N. What is the magnitude of the acceleration of the rock?
The speed of a sound in a container of hydrogen is 201K is 1220m/s. what would be the speed of sound if the temperature were raised to 405K? suppose that hydrogen behaves like an ideal gas.
The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain by the block and tackle pulley system. What is the work done..
At what angle should a curve of radius 155m be banked, so cars can travel safely at 26m/s without relying on friction.
What is the total force on an object if 47.2 pounds upward, and 59.3 lb to the right are acting on it? answer sketching the diagram and show mathematical calculation.
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
After thermal equilibrium has been reached, the system has a change in temperature measured as 0.020 oC. explain the entering speed of the bullet.
Two loudspeakers are placed at either end of a gymnasium, both pointing towards each other. The sound emitted by the speakers is in phase and are of frequency of 256 Hz.
Draw a motion diagram for the train. Assume that the train is moving toward the right and starts to slow down at t = 0. The separation of each dot represents an elapsed time of one second.
What is the potential energy of this group of charges. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the acceleration of crate.
Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 3.3 m/s..
What are the total displacement and angle of displacement
A force vector has a magnitude of 590 newtons and points at an angle 44o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
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