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Question: A sound wave enters from a warm room at 23°C to chilly room at 2°C. If the frequency of the sound is 1500 Hz,
A. What is the difference in the wavelength of the wave between two rooms?
7400 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.33, How much input heat does the second engine require
The average speed of a nitrogen molecule in air is about 6.70*10^2 m/s, and its mass is about 4.68*10^-26 kg. What average force does the molecule exert on the wall
A thin film of polystyrene is used as an antireflective coating for fabulite, What is the minimum thickness of film required, Assume that the wavelength of the light in air is 510 nanometers
A young hockey player stands at rest on the ice holding a 1.3 kilogram helmet. Calculate the mass of the hockey player
A child slides down a slide with the 29 degree incline, and at the bottom her speed is precisely half of what it would have been if the slide had been frictionless. Compute the coefficient of sliding between the child and the slide.
a battery has an emf and an internal resistance r. when the battery is connected to a 25omega resistor the current
A cameraman on a pickup truck is traveling westward at 24 km/h while he videotapes a cheetah that is moving westward 25 km/h faster than the truck. Abruptly, the cheetah stops, turns, and then run at 42 km/h eastward, as gauged by a suddenly nervous ..
The ball rebounds straight upward to a height of 3.20 m. Taking the negative direction to be downward, illustrate what is the impulse of the net force applied to the ball during the collision with the floor?
A skier starts from rest at the top of a friction less incline, of height 20.0 m. Evaluate the horizontal distance the skier travels before coming to rest if the incline also has a coefficient of kinetic friction equal to 0.210
two objects are identical and small enough that their sizes can be ignored relative to the distance between them which
A 1.00 V potential difference is maintained across a 9.0 resistor for a period of 16.0 s. What total charge passes through the wire in this time interval
A plane, diving with constant speed at an angle of 52.0 degree with the vertical, releases a projectile at an altitude of 790 meter. Compute how far did the projectile travel horizontally during its flight
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