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Think about how oscillations relate to energy and forces. We know that when amass is hung vertically we can balance forces such that the spring force up is equal in magnitude to the force of gravity down and the mass is stationary. Yet when we release the mass from the position where the spring is unstretched, the mass oscillates. Explain why the mass oscillates around the equilibrium position and does not stop given that the net force at the equilibrium position is zero.
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. Calculate the wave speed in the string
The lenses of a particular set of binoculars have a coating with index of refraction n = 1.38, and the glass itself has n = 1.52. what is the minimum thickness of the coating
A piano string having a mass per unit length equal to 5.02g/m is under a tension of 1330N. Find the speed that a wave travels on the string
It takes a force of 85.0 N to compressthe spring of a toy popgun 0.203 m to"load" a 0.153 kg ball. With what speed will the ball leave the gun
Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. how many TOTAL number of maxima can be seen
An ideal refrigerator does 160 J of work to remove 570 J of heat from its cold compartment during each cycle. What is the refrigerator's coefficient of performance
An ideal transformer has 400 turns on its primary and 18 turns on its secondary. what is the power output
If all of the water's potential energy is converted to kinetic energy at the bottom of the falls and the kinetic energy goes to heat the water
A 72.0-kg man is riding an escalatorin a shopping mall. What is the work done on the manby each of the gravitational force
An object is located 70 cm from a concave mirror with a focal length of 15 cm. What is the image distance? Is the image real or virtual?
A beam of unpolarized light is sent through two polarizing sheets placed one on top of the other. What must be the angle between the polarizing directions
A 1.50*10^3-kg car starts from rest and accelerates uniformly to 19.1 m/s in 12.0 s. Find the instantaneous power output of the engine at t = 12.0 s, just before the car stops accelerating
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