A cylindrical tank has a height 8 m and a radius 2 m. Suppose the water tank is halffull of water. Determine the work required to empty the tank by pumping the water to the top of the tank. Use 1000 kg/m3 for the density of water and 9.8 m/s2 for the acceleration due to gravity.

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?