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A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. If the observer hears the sound of the cannon fire 2.47 seconds after he sees the cannon ball pass over his head, how far is the cannon from the observer? The temperature on this day is 14.99 C.
A balloon of volume 2.7 m^3 contains argon gas at a pressure of 2.4 10^5 Pa and room temperature (20°C). What is the total internal energy of the gas?
When spiking a volleyball, a player changes the velocity of the ball from 4.0m/s to -28m/s along a certain direction. what is the mass of the volleyball
From a cliff that is 9.4 m above a lake, a young woman (mass 44 kg) jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wavelength.
How numerous atoms does each hand contain
He+ is a helum atom with one electron missing. Treating this like a hydrogen arom, what is the first excited state of this atom
a reseacher wishes to estimate with 95 confidence the percentage of adults who support abolsihing the penny. his
In a 30.0 s interval, 540 hailstones strike a glass window of area 0.600 m2 at an angle of 45.0° to the window surface. Find the pressure on the window
A 45 g golf ball is pushed up a 30° ramp. The ball starts from rest and the length of the surface of the ramp is 5 m. What was the magnitude of the pushing force
an astronaut on the moon weighs only one sixth of what he weighs on earth. explain why period does not depend on the mass of pendulum
We have an RC circuit with a 1.0 mega Faraday capacitor, a 20 kilo-ohms resistor, amd a 9.0 volt battery. what is the voltage between the plates of the capacitor
A 80 kg football player stand at the end of a uniform 8m, 50kg diving board supported as shown. Determine the forces exerted by the two supports.
The range of human hearing is roughly from twenty hertz to twenty kilohertz. what are the lengths of the longest and shortest pipes
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