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The circumference of the moon's orbit around the earth is 2.415275282*106km. The orbital period of the moon is about 27.32 days. Calculate the average orbital speed in m/s of the moon.
A boy 11.0m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. How far from the tree will the dog catch the ball
The coefficient of performance of a refrigerator is 3.4. The compressor uses 20 J of energy per cycle. How much heat energy is exhausted per cycle
A juvenile elephant has a mass of 300kg. He wishes to fly using his very large ears. find the total surface area of his two ears
An elevator has mass 550kg , not including passengers. The elevator is designed to ascend, at constant speed, What is the maximum number of passengers that can ride in the elevator
For gas storage, thick metal cylinders whith an internal volume of 25 litres are used; typical cylinders can safely maintain a pressure of 180 atm. how many moles of gas can such a cylinder hold
a uniform, upward electric field of magnitude 1.60 x 103 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. How far horizontally from the left edge will the electron strike
A certain laser emits light in a narrow band of wavelengths centered at 632.7 nm and with a ''wavelength width'', What is the corresponding ''frequency width'' in hertz for the emission
A sound wave is traveling in seawater, where the adiabatic bulk modulus and density are 2.3 109 Pa and 1025 kg/m3, respectively. What would be the beat frequency heard by an underwater swimmer
A solid cylinder of radius r1 = 3.0 cm, length h1 = 6.0 cm, emissivity 0.87, and temperature 35°C is suspended in an environment of temperature 64°C. What is the cylinder's net thermal radiation transfer rate
If a spaceship orbits an asteroid with a radius of 800m, find the asteroid's moment of inertia in orbit
A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. What is the temperature of the helium
An injured monkey sits perched on a tree branch 3.0 m above the ground, what is minimum speed the tranquilizer dart must leave the gun to still hit the monkey
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