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Some people will pay a higher price for brand-name goods. For example, some people buy Rolls-Royces and Rolex watches to impress others. Does knowingly paying higher prices for certain items just to be a "snob" violate the law of demand?
A 400 g baseball thrown with a velocity of 40 m/s is hit straight back at the pitcher with a velocity of -50m/s. What is the change in momentum of the ball? What is the impulse exerted on the ball by the bat?
Assuming that solar panels currently sell for about $2.50 per watt of peak output power and that Xcel energy currently bills customers for electricity at about $0.10 per kilo-watt hour, how long will it take a solar panel installation to pay for itse..
A square, 0.80 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. The axis is perpendicular to the plane of the square. A force of 15.6 N lies in this plane and is applied to the square. What ..
One object is at rest, and another is moving. The two collide ina one-dimensional, completely inelastic collision. In other words,they stick together after the collision and move off with a commonvelocity. Momentum is conserved.
question1a 25mw jet engine produces a sound level of 120db threshold of pain at a distance of 100m from the engine
Assume 1 kilogram of water at 100oC is mixed with 1 kilogram of water at 0oC. Find the total change in entropy of the mixture
q1. an alpha particle helium nucleus is travelling along the positive x-axis at 1250 ms when it enters a cylindrical
A bat and ball approach one another each with the same speed of 1.50 m/s, collide. Determine the speed of the ball after the collision
a vector A has a magnitude of 40.0 m and points in a direction 20.0 degrees below the positive x axis. find the magnitude and direction of the vector C
A 840-kg drag race car acceleratesfrom rest to 105 km/h in 0.80 seconds. What is the change in momentum of the car
Determine the force per unit length between two long, straight, parallel conducting wires separated by 10cm and carrying currents of 4A and 8A in the same direction
When a ceiling fan rotating with an angular speed of2.70 {\rm rad/s} is turned off, a frictional torque of0.140 {\rm N \cdot m} slows it to a stop in 25.5 {\rm s}. What is the moment of inertia of the fan
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