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1. A spring oriented vertically is attached to a hard horizontal surface as in the figure below. The spring has a force constant of 1.37 kN/m. How much is the spring compressed when a object of mass m = 2.95 kg is placed on top of the spring and the system is at rest?
2. A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 107 g and rises to a maximum height of 45.0 cm, estimate the force constant of the spring.
NASA has attempted to use the concept of motional EMF to produce energy for satellites in orbit. what is the equivalent resistance of the electrical system of the satellite
7.5 mol of helium are in a 18 L cylinder. The pressure gauge on the cylinder reads 67psi, What are the temperature of the gas in Celsius and the average kinetic energy of a helium atom
A student's car stalls right in front of a speed bump while she is on her way to physics class, If is 12.7°, what is the size of the force pulling the car in lbs
A ball is thrown at an angle of 52.5 degree above the horizontal at a speed of 8.2 m/s. What is the vertical component of the ball's velocity
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. what is the current in the solution
A uniform rod of length 0.790 m and mass 14.50 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45-kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
Determine the normal force exerted by the road on the car, the normal force exerted by the car on the 73-kg driver, and the car speed at which the normal force on driver equals zero.
Calculate the hydrostatic difference in blood pressure between the brain and the foot in a person of height 1.75 m
Place a 2kg textbook against a vertical wall and press on it with a force of 40 N. determine the acceleration of the textbook
Determine the amount by which the star's thermal radiation increases the entropy of the universe each second. Assume that the star is a perfect blackbody, and that the average temperature of the rest of the universe is 2.73 K. Do not consider ther..
Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium
An object with a mass of m = 5.3 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.255 m and mass of M = 3.00 kg, Determine the speed with which the object hits the floor
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