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The boiling point of liquid nitrogen is 77.3 K at atmospheric pressure. What is this temperature on the Celsius scale? What is this temperature on the Fahrenheit scale?
A standing observer perceives a train whistle to have a frequency of 300 Hz. calculate the frequency of the sound waves emitted from the train
To determine the specific heat of an object, a student heats it to 100 degrees C in boiling water. If the final temperature is 23.8 degrees, what is the specific heat of the object
An asteroid is discovered heading straight toward Earth at 15km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 min, after which the asteroid is moving at 29degree to its original path at a..
One recent study has shown that x rays with a wavelength of 0.0034 nm can produce mutations in human cells. (a) Calculate the energy in eV of a photon of radiation with this wavelength. eV (b) Assuming that the bond energy holding together a water mo..
A sinusoidal current i= Icoswt has an rms value of I rms = 2.20 A. What is the current amplitude, What is the rectified average current
A 5.0-kg object with a speed of 4.0 m/s collides head on with a 10-kg object moving toward it with a speed of 3.0 m/s. what is the post-collision speed of the 5.0-kg object
A horizontal mass-spring system has low friction, spring stiffness 250 N/m, and mass 0.370 kg. The system is released with an initial compression of the spring of 10.8 cm, What is the maximum speed during the motion
A mass (3kg) on a string lies on a horizontal frictionless surface tied to a central point. How fast can the mass move around the circle without breaking the string
An 81 mm focal-length lens is used to focus an image on the film of a camera. How far ahead of the film should the lens be if the object to be photographed is 10.0m away
A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. Find the total sound intensity that the man hears when he is at his initial position halfway between the speakers
A ball of mass 1.7 kg hangs at the end of a string 1.2 m in length from the ceiling of a room. The height of the room is 4.0 m. What is the gravitational potential energy of the ball relative to the ceiling
Estimate the Doppler shift for a radio wave reflected from an airplane moving directly toward you at a speed of 298 m/s. Assume the radio wave has a frequency of 8.9 106 Hz
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