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A skateboarder of mass 60.1 kg is riding her 3.89-kg skateboard at a speed of 5.21 m/s. She jumps backward off her skateboard, sending the skateboard forward at a speed of 7.53 m/s. At what speed is the skateboarder moving when her feet hit the ground?
How many kilograms of water at 100.0 C could be converted to steam by the addition of 1.13 x 10^7 joules of thermal energy.
The air inside a bicycle tire pump has 243 joules of work done on it as 66.5 joules of heat is conducted away from it
A person with a black belt in karate has a fist that has a mass of 0.70 kg. What is the magnitude of the average net force
he triceps muscle in the back of the upper arm extends the forearm. What is the moment of inertia of the boxer's forearm
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.3 m, What is the speed of the ball in orbit
A biology student uses a simple magnifier to examine the structural features of an insect's wing. The wing is held 3.60 cm in front of the lens, What angular magnification is achieved
An object is placed 2.0 cm from a converging lens with focal length 1.5 cm. Determine the location of the final image
Four wires meet at a junction. In two of the wires currents I1 = 1.55 A and I2 = 2.15 A enter the junction. Find the current in the fourth wire and indicate its direction
A string with a mass of 31 g and a length of 2 m is stretched under a tension of 67 N. How much power must be supplied to the string to generate a traveling wave that has a frequency of 51 Hz and an amplitude of 4 cm?
A projectile is fired vertically from Earth's surface with an initial speed of 9.6 km/s. Neglecting air drag, how far above the surface of Earth will it go
A wire is made of a material with a resistivity of 4.84004 × 10 ?8 ? · m. evaluate the resistance of the wire
Flying due east, the plane flies with the rotation of the Earth, while flying due west, it flies against the rotation. Will the flight times be the same? Different? Why?
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