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A laser beam is directed from air (n = 1.0) into an unknown liquid. The angle of incidence is measured to be 60° and the angle of refraction is measured to be 45°. What is the index of refraction of the unknown liquid?
A person who weighs 684 N steps onto a spring scale in bathroom, and the spring compresses by 0.518 cm. (a) What is the spring constant? (b) What is the weight of another person who compresses spring by 0.328 cm.
A copper-bottomed kettle, its bottom 24 cm in diameter and 3.0 mm thick, sits on a burner. What is the temperature of the bottom surface of the kettle
An ideal gas expands isothermally, performing 4.36 multiplied by 103 J of work in the process. Calculate the change in internal energy of the gas
A wheel with c=4/9, a mass of 43.8kg, and a rim radius of 31.1cm is mounted vertically on a horizontal axis. Find the angular acceleration of the wheel
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 56 dB by an observer 10 km away. What is the average power generated by the horn
The disk in a hard drive in a desktop computer rotates at 7200 rpm. The disk has a diameter of 5.1 in (13 cm). What is the acceleration of this point on the disk
An electron is released to accelerate from point 1 to point 2 in a potential region. The electric potentials at these points are V1 = -35 V and V2 = +200 V. Calculate the change in potential energy of this electron
A cylinder which is in a horizontal position contains an unknown noble gas at 4.63 × 104 Pa and is sealed with a massless piston. calculate the change in internal energy of the system
A 170 g ball attached to a spring with spring constant 2.1 N/m oscillates horizontally on a frictionless table. Its velocity is 22 cm/s when xo= 4.3 cm. What is the ball's position when the acceleration is maximum
Consider a heat pump which is used to cool down a home during the summer. Its coefficient of performance in cooling mode is 4.14. at what rate does it remove heat from the home
A 15.0 g bullet is fired at a muzzle velocity of 3250 m/s from a high powered rifle with a mass of 4.75 kg and barrel of lenght 75.0 cm. How long is the bullet in the barrel
A thick-shelled hollow metal sphere contains in its cavity 2.0 nC of charge. What is the flux emanating from the outer surface
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