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Determine the force of friction between a wooden block and the surface o which it is resting
How far apart must two protons be if the magnitude of the electrostatic force acting on either one is equal to the proton's weight at earth's surface?
In each cycle, 420 J of heat energy is rejected to the low temperature reservoir. In each cycle, how much mechanical work W is performed by the engine?
A 200.0 g copper block absorbs 2.34 × 103 J of heat to raise its temperature by 30.0 K. What is the specific heat of copper?
What is the displacement of the string as a function of x at time T/4, where T is the period of oscillation of the string?
A step-up transformer has 340 turns on its primary coil and 90,000 turns on its secondary coil. The EMF of the generator to which the primary circuit is attached is 55.0 V. What is the EMF in the se
A 0.420-kg ball is dropped from rest at a point 1.30 m above the floor. The ball rebounds straight upward to a height of 0.580 m. What are the magnitude and direction of the impulse of the net forc
The radius of the hydrogen atom is 5.49 × 10-11 m, estimate the speed of the orbiting electron (in m/s) using Newtonian physics.
A 305 kg sailboat has an acceleration of 0.48 m/s2 at an angle of 63° north of east. Find the magnitude and direction of the net force that acts on the sailboat.
How many times does the flash of the gunshot travel the round-trip distance between the mirrors before the echo of the gunshot is heard?
An AC generator has a peak voltage of 56 V at a frequency of 906 Hz. What is the RMS voltage of the generator?
If you place it in clear soybean oil, you may not be able to see it. What does this tell you about the speed of light in the oil and in the glass?
A horizontal spring-mass system has low friction, spring stiffness 240 N/m, and mass 0.4 kg. The system is released with an initial compression of the spring of 9 cm and an initial speed of the mass
When she plucks the rope, a wave propogates at 18 m/s. this is too slow, and she desires to increase the wave speed to 30 m/s. what mass should she use?
Suppose too that the bullets rebound straight back with no change in speed. What is the magnitude of the average force on Superman's chest from the stream of bullets?
What is the distance delta y between the two points that you observe? Assume that the plates have length d , and use e and m for the charge and the mass of the electrons, respectively.
A small rock moves in water, and the force exerted on it by the water is given by equation . The terminal speed of the rock is measured and found to be 1.9 . The rock is projected upward at an init
A 100 kg chesterfield is pushed up a frictionless ramp at a constant speed by a delivery person. If the ramp is inclined at 25.5? to the horizontal, what horizontal force must the delivery person appl
A spring with a spring constant of 2.2E2 N/m is attached to a 1.8 kg mass and then set in motion. What is the period of the mass-spring system?
The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 7.0 kg. Find the moment of inertia of the system about the z axis.
Two satellites orbit the Earth, with satellite 1 at a greater altitude than satellite 2. Why does satellite 2 have a greater orbital speed? Calculate the orbital speed of a satellite that orbits at
The resonant frequency of a series RCL circuit is 10.5 kHz. The inductance and capacitance of the circuit are each quadrupled. What is the new resonant frequency?
Find the orbital speed of a satellite in a geosynchronous circular orbit 3.65×107 m above the surface of the Earth.
Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 4.5° angle with the vertical.
A parallel-plate capacitor has an area of 2.0cm^2, and the plates are separated by 2.0mm. a) What is the capacitance?