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A model rocket with mass 1.67kg starts from rest on the ground and accelerates upward with engine force 46.8N . From launch until the rocket reaches a height of 106m , find the work done by the rocket engine.
Find the final velocity of the two balls if the ball with velocity v2i = ?21.4 cm/s has a mass equal to half that of the ball with initial velocity v1i = +25.8 cm/s
A 3.5 g ping-pong ball rubbed against a wool jacket acquires a net positive charge of 1.5muC. Estimate the fraction of the ball's electrons that have been removed
A billiard ball moving at 5 m/s strikes a stationary ball of the same mass. After the collision, find the struck ball's velocity (magnitude and direction) after the collision
A 100 m tall water tower holds a huge amount of water, so that the water level in the tower remains approximately constant even when some water flows out through a faucet at the bottom of the tower.
In a movie, Tarzan evades his captors by hiding underwater for many minutes while breathing through a long, thin reed. calculate the deepest he could have been
An electrical generating plant operates a boiler at a temperature of 220 C, What is the maximum theoretical efficency of the plant
A high speed photograph of club hitting a golf ball is shown in the figure below. find the average force exerted on the ball by the club
A 0.575 kg mass falls from a height of 3.95 m. If all of the energy of this mass could be converted to visible light of wavelength 5.29E-7 m
Calculate the per capita energy use for China and India. The populations of each country should be obtained from reliable sources. Express your final answer in units of kcal per day per person.
Two locomotives approach each other on parallel tracks. Each has a speed of v = 95 km/h with respect to the ground. how long will it be before they reach each other
An airplane propeller is 2.18 m in length (from tip to tip) with mass 97.0 kg and is rotating at 2600 rpm (rev/min) about an axis through its center. What would its angular speed have to be
An underwater scuba diver sees the Sun at an apparent angle of 42.0° from the vertical. What is actual direction of the Sun
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