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a frictionless pendulum of length 3 m swings with an amplitude of10 degrees. At its max. displacement, the potential energy of thependulum is 10 J. What is the kinetic energy of the pendulum whenits potential energy is 5 J?
A distant galaxy is simultaneously rotating and receding from the earth. As drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.8 x 10^6 m/s.
Two wires, one of gold and the other of tungsten, are heated from 18 degrees C to the same final temperature. what is the percentage increase in the resistance of the tungsten wire
You are designing a precision mercury thermometer based on the thermal expansion of mercury, Determine the initial volume of mercury that allows this change, Find the radius of a spherical bulb that contains this volume of mercury
An elevator's cable snaps and its emergency brakes start gripping at the secondary line in order to slow its descent. How fast is the elevator going after falling 3 stories
A right triangle has a hypotenuse of length 17 cm and a leg of length 15 cm. What is the length of the other leg
2.0 g of helium at an initial temperature of 300 K interacts thermally with 8.0 g of oxygen at an initial temperature of 600K. What is the initial thermal energy of each
A steel wire of length 1.97m with circular cross section must stretch no more than 0.270cm, What minimum diameter dmin is required for the wire
A buzzer generates a sound by vibrating with a frequency of 440 Hz in air. If this buzzer is placed under water, What frequency would a fish hear
During a physics experiment, helium gas is cooled to a temperature of 19.0K at a pressure of 6.00×10?2atm. find the rms speed of the atoms
Consider a series RLC circuit where R = 957 ? and C = 5.25 ?F. However, the inductance L of the inductor is unknown. What is the inductance of the inductor in millihenrys
q1. youngs double-slit experiment is performed with 570 nm light and a distance of 2.00 m between the slits and the
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
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