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A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 degree relative to the normal. If the index of refraction of water and glass are 1.33 and 1.5, correspondingly, find at what angle does the light leave the glass (relative to its normal)?
Two objects are connected by a light string that passes over a frictionless pulley, Find the magnitude of the accelerations of the objects
A small piece of dust ofmass m = 2.3 µg travels through an electric aircleaner in which the electric field is 567 N/C. The electric force on the dust particle is equal to the weight of the particle.
A 640-g hollow ball 21cm in diameter is suspended by a wire and is undergoing torsional oscillations at a frequency of 0.78 Hz
a 3.50 kg penguin runs onto a huge sheet of frictionless arctic ice. at t 0 it is at x 0 and y 0 with an initial
Suppose a beam of 5.0 eV protons strikes a potential energy barrier of height 5.5 eV and thickness 0.59 nm, How long would you have to wait-on average-for one proton to be transmitted
A person pushes horizontally with a force of 170 N on a 60 kg crateto move it across a level floor. The coefficient of kineticfriction is 0.25. (a) What is the magnitude of the frictionalforce? (b) What is the magnitude of the crate'sacceleration?
Explain the relationship between the wave speed, frequency and wavelength? Find the relationship between wave speed and physical parameters of the string system? Explain how are the two expressions related
A potential difference V is applied to a wire of cross section A, length L, and resistivity ?. You want to change the applied potential difference, What should be the new values of L and A in terms of the old values
suppose that sound is emitted uniformly in all directions by a public address system. the intensity at a location 25 m
A person ofmass 75 kg stands at the center of a rotating merry-go-roundplatform of radius 2.8 m and moment of inertia 1300 kgm2. Calculate the rotational kinetic energy of the system
a piece of wire is stretched from length l1 to a length of l2 step a and then from length l2 to length l3 step ba write
a 9900 linecm grating reveals that a beam of light contains three different wavelengths. if the light had been
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