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Problem: The sun is 24 degrees above the horizon. It makes a 60m long shadow of a tall tree.
Part A: What is the height of the tree?
I need help to calculate the height of the tree.
a small solid disk of mass m and radius r rolls without slipping down a ramp. if it starts from rest at the top of the
How fast should the platform move, v_p, for the person to detect a beat frequency of 7.00 Hz ? Take the speed of sound to be 344 m/s. Express your answer numerically in meters per second.
a cylindrical container with a cross-sectional area of 62.2 cm2 holds a fluid of density 786 kgm3. at the bottom of the
An LC circuit consists of a 3.4-µF capacitor and a coil with a self-inductance 0.080 H and no appreciable resistance. Determine what will be this maximum current
a volleyball spiked so that its incoming velocity of +4.0m/sis changed to an outgoing velocity of -21m/s. The mass of thevolleyball is 0.35 kg. what impulse does the player apply to the ball
A penny of mass 3.10 g rests on a small 22.40 g block supported by a spinning disk of radius 11 cm. The coefficients of friction between block and disk are 0.715 (static) and 0.64 (kinetic) while those for the penny and block are 0.564 (static) an..
A golf club strikes a 0.047-kg golf ball in order to launch it from the tee. With what speed does the ball leave the club
A man with a mass of 100kg is standing on a uniform plank of mass 50kg. At the man's new position, what is the force the right support exerts on the plank
Larger animals use proportionately less energy than smalleranimals; that is, What resting power does this correspond to
A simple pendulum has a period of 2.5 s. (a) What is its period if its length is made four times larger? (b) What is its period if the mass of the suspended bob is made two times larger?
A river has a steady speed of 0.500 m/s. A student swimsupstream a distance of 1.00 km and swims back to the startingpoint. how long does the trip take
A vibrating source generates a harmonic wave on a string underconstant tension. If the power delivered to the string is doubled, by what factor does the speed change
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