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A football is kicked with a speed of 20m/s at an angle of 40 degrees to the horizontal
a] how long is the football in the air?
b] how far does the football travel horizontally before if hits the ground
c] what is the final velocity
What is the gas pressure? Give your answer in atm. The gas then undergoes an isothermal compression until the pressure is 3.1atm, What is the final temperature of the gas
A novice skier, starting from rest, slides down a frictionless 35° incline whose vertical height is 118 m. Explain how fast is she going when she reaches the bottom? Illustrate what was the initial speed of the arrow?
An aluminum wire with a diameter of 0.105 mm has a uniform electric field of 0.295 V/m imposed along its entire length, What is the drift speed of the conduction electrons
A 0.2kg aluminum plate, initially at 20C, slides down at a 15.00 m long surface, incline at a 30 degree angle to the horizontal. The force of kinetic friction exactly balances the component of gravity down the plane so that the plane.
Assume that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision.
Radiation can supplement the energy needs of a home's water heater, Find what volume of water can be heated per hour from a temperature of 16.0oC to a temperature 61.0oC
A child slides across a floor in a pair of rubber-soled shoes. Thefriction force acting on each foot is 20.0 N. The footprint area ofeach shoe sole is 14 cm2, and the thickness of eachsole is 5 mm. Find the horizontal distance by which the upper a..
A 460-Hz tuning fork causes resonance in the tube depicted in the figure below when the length L of the air column above the water is 18.3 and 55.8 cm, Find the speed of sound in air
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?
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?
Suppose there are two concentric thin walled conducting spheres, the inner one of radius 10 cm and the outer one of radius 12 cm. If the inner one has a charge of 2.2 C and the outer one has -2.2 C, what is the E field at a point 11 cm from the ce..
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle. The magnitude of each of the charges is 4.0 µC, and the lengths of the sides of the triangle are 4.4..
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