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A football is kicked straight up into the air; it hits the ground 3.4s later. What was the greatest height reached by the ball? Assume it is kicked from ground level. With what speed did it leave the kicker's foot?
A quarter-pound hamburger with all the fixings has a mass 210g . The food energy of the hamburger is 2.4MJ. What is the energy equivalent of the mass of the hamburger
A small but measurable current of 1.1 10-10A exists in a copper wire whose diameter is 3.1 mm. Assume the current is uniform. Calculate the current density
A gob of clay, mass 217 g, falls from rest a distance 50 cm before striking and sticking to the edge of a wheel free to rotate about a horizontal axis through its center.
You're carrying a 4.0-m-long, 25 poles to a construction site when you choose to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force should you exert to keep pole motionles..
An RLC circuit is set up with a 350 mH inductor, a 6.8 mF capacitor and a 550 W resistor. Sketch the phasor diagram for this circuit
A 640-g hollow ball 19cm in diameter is suspended by a wire and is undergoing torsional oscillations at a frequency of 0.78 Hz
The acceleration of gravity is 9.81 m/s^2. Assuming that air resistance is simply a constant 96 N force on the person during the fall, identify the person's velocity just before hitting the net. Answer in units of m/s.
An electric motor rotating a workshop grinding wheel at a rate of 9.90 x 10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
Estimate the particle density necessary for bose-Einstein condensation of a hydrogen gas to occur at 100 nK. find the ratio of the thermal wavelength to the atom spacing
A converging lens and a diverging lens, separated by a distance of 30.0 cm, are used in combination. Calculate the focal length of the diverging lens
A 0.200-kilogram piece of aluminum at 100 °C is immersed in 0.85 kg of water at 15 °C. what is the temperature of the metal and water
A horizontal 790-N merry-go-round of radius 1.20 m is started from rest by a constant horizontal force of 45 N, Find the kinetic energy of the merry-go-round after 5.0 s
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