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A 270 N sphere 0.20 m in radius rolls,without slipping 6.0 m down a ramp that is inclined at 31° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts fromrest?
rad/s
A motor may be modeled as a series RL circuit. A particular motor operates from an ordinary 60-Hz wall outlet with Erms= 115 V. what is the inductive reactance of the circuit
Two cars collide at an intersection. Car A, with a mass of 2000kg , is going from west to east, How fast was car A going just before the collision
an antelope moving with constant acceleration covers thedistance between two points 70.0m apart in 7.00s. its speed as itpasses the second point is 15m/s. what is its speed at the frist point
Two spaceships approach each other, each moving with the same speed as measured by an observer on the Earth. find the speed of each spaceship as measured on Earth
Ice has formed on a shallow pond, and a steady state has been reached, with the air above the ice at -3.5°C and the bottom of the pond at 4.0°C. how thick is the ice
A 21 kg solid door is 220 cm tall, 94 cm wide. What is the door's moment of inertia for rotation about the vertical axis inside the door, 17 cm from one edge.
A railroad car of mass 2.3 104 kg moving at 3.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car, How much kinetic energy is lost in the collision
A stone is thrown from the top of a cliff 150 m above the ground, What is the speed (magnitude of velocity) of the stone when it hits the ground
Suppose the distance from the lens system of the eye (cornea + lens) to the retina is 18 mm. What must the power of the lens be when looking at distant objects
Calculate the mass flow rate (in grams per second) of blood (? = 1.0 g/cm3) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 30 cm/s
If the final angles are measured to have the values ?=10° and f= 8°, calculate the final speeds for the two pucks
When two identical ions are separated by a distance of 8.3×10?10m , the electrostatic force each exerts on the other is 5.4×10?9N How many electrons are missing from each ion
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