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King Arthur's knights fire cannonball from the top of the castle wall. The cannonball is fired at a speed of 55 m/s and an angle of 29o above the horizontal. A cannonball that was accidentally dropped hits the moat below in 1.6 second.
A. Find how far from the castle wall does the ball hit the ground?
B. Find the cannonball maximum height above the ground?
What is the total negative charge, in coulombs, of all the electrons in a small 1.05g sphere of carbon? One mole of C is 12.0g, and each atom contains 6 protons and 6 electrons.
Calculate the moment of inertia of a skater given the following information. THe 65 kg skater is approximated as a cylinder that has a .110 m radius
A sealed container of volume 0.10 m3 holds a sample of 3.0 × 1024 atoms of helium gas in equilibrium. What is the average kinetic energy of the helium atoms
A five kilogram block and a four kilogram block are placed at either end of a compressed spring. what is the velocity of the other block
for distant stars astronomers estimate the distance by comparing the intensity of light coming from these stars with
A hot air balloon is a bit like a bubble in water. It rises in air when the mass of relatively cool surrounding air displaced by the balloon is greater than the mass of the balloon and the gondola that hangs below it.
a basket ball player is 10.0 m from the basket. the height of the basket is 3.05 m. if he shoots the ball at an angle
One kilowatt-hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour, Determine the number of joules of energy in one kilowatt-hour
Two vectors A and B have the similar magnitude of 100 N (they represent forces of equal strength). What is the magnitude of the resultant vector of A and B if they are parallel and pointing in opposite directions.
A satellite in Earth orbit has a mass of 92 kg and is at an altitude of 2.04 106 m. (Assume that U = 0 as r ? infinity.) (a) What is the potential energy of the satellite–Earth system? J (b) What is the magnitude of the gravitational force exerted..
A car is traveling down around a banked curve in the road. The curve has a radius of 300 m and is banked at an angle of10.0o. (a) At what speed is no friction required?
A photon with a wavelength of 5.70e-11 m is scattered by a loosely bound electron in a metallic target and exits at an angle of 135° from its original direction. What is the wavelength of the scattered photon?
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