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A key falls from a bridge that is 52 mabove the water. It falls directly into a model boat, moving withconstant velocity, that was 13 m from thepoint of impact when the key was released. What is the speed of the boat?
if an acoustic wave from an echo sounder on a ship take .30 seconds to reach the sea-floor and reflected wave returns to the boat in .30seconds how deep is the water.
What will be the acceleration of three of these objects glued together if they are pulled by two rubber bands
One of the most efficient engines ever built is a coal-fired steamturbine in the Ohio valley, driving an electric generator as itoperates between 1870°C and 430°C. What is its maximum theoretical efficiency
consider an atomic nucleus to be equivalent to a one-dimentional infinite potential well. what is the wavelength of the emitted light
a runner with a mass of 60kg accelerates from 0 to 9 ms in 3 s. fin a runner with a mass of 60kg accelerates from 0 to
Each of the plates of a parallel plate capacitor has an area of 10.6cm^2 and a plate separaton difference of 2mm. Calculate the charge on the capacator
The water is near freezing in temperature. Typically a human can only swim in such water for about 5 minutes before hypothermia sets in. Calculate the time the explorer spends in the water if the river is 87.3 feet wide
A 8.7 kg freight car is coasting at a speed of 38.8 m/s along a straight track when it strikes a 13.5 kg stationary freight car and couples to it. What will be their combined speed after impact
you are serving as a technical consultant for a locally produced cartoon. in one episode two criminals shifty and lefty
Lead has a critical temperature of 7. 2 K and a critical field at 4. 2 K of 430 A/cm. (a) What is the critical field at T = 1 K? (b) At 4. 2 K, how much current can a 1-mm-diameter lead wire carry without resistance?
A mass-spring system oscillates with an amplitude of 4.40 cm. If the spring constant is 237 N/m and the mass is 411 g, Determine the maximum speed of the object
A 1130 kg car traveling initially with a speed of 25.60 m/s in an easterly direction crashes into the back of a 9 550 kg truck moving in the same direction at 20.0 m/s. What was the velocity of the truck right after the collision
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