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A sonar generator on a submarine on the ocean surface produces periodic ultrasonic waves at a frequency of 2.50 MHz. The wavelength of the waves in seawater is 4.80 X 10^-4m. When the generator is directed downward, an echo reflected from the ocean floor is received 10 s later. How deep is the ocean floor?
What is diameter of the circle
A sudden gust of wind gives the boat an acceleration a, What is the boat's direction 6.4s later when the gust subsides
You are traveling on an airplane. The velocity of the plane with respect to the air is 110 m/s due east, What is the heading of the plane with respect to the ground
establish linear speed of the dragster.
A cylindrical container 2.00 tall contains mercury to a certain depth; the rest of the cylinder is filled with water. If the pressure at the bottom of cylinder is two atmospheres, what is the depth.
A fully equipped astronaut has a mass of 140 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
Find out that the value of the gravitational field strength
In a local bar, a customer slides an empty beer mug down the counter for a refill. What was the direction of the mug's velocity just before it hit the floor
A star is moving away from the Earth at the speed of 200 km/s. What will be the wavelength of a spectral line that would have the wavelength of 500 nm if the star were at rest.
A positively charged rod is brought close to one end of an uncharged metal rod but does not actually touch it. What type of charge does the end of the metal rod closest to the positively charged rod acquire?
A 200-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
For a damped oscillator with a mass of 380g, the spring constant 120 N/m and a damping coefficient of 76 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 28 cycles.
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