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A plane mirror:
a) Produces both real and virtual imagesb) Always produces a virtual imagec) Always produces a real image
An electrical resistor has a voltage drop of 5.00 V when 0.300 A of current flows. At what rate (W) is heat dissipated
A freezer is used to freeze 2.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0°C. Determine the change in the entropy of the freezer
An iron disk has a radius of 0.445 m and a mass of 367 kg. The disk is mounted on its axis so that it is free to spin. If the torque is applied at the edge of the disk, how much force is required
Water flows at 0.990 m/s from a hot water heater, through a 450-kPa pressure regulator. What's the flow speed in this pipe
Three ships leave a spacestation at nearly the same time. As seen by a spacestation observer, Find the speed and direction of ships 2 and 3
The strongest person in the world lifted th read end of his car a mass of 615 kg a verticle distance of .24 meters. How much work did he do to life the car
A cylindrical log of uniform density and radius R = 30.0 cm floats so that the vertical distance from the water line to the top of the log is d = 12.0 cm
A certain metal with atomic mass 2.6 × 10?25 kg has an interatomic bond with length 2.5 × 10?10 m and stiffness 45 N/m. What is the speed of sound in a rod made of this metal
The prong of a tuning fork moves back and forth when it is set into vibration. what are the maximum velocity and the maximum acceleration of the prong
A 60 kg barrel is lifted 2.0 m in the air using a pulley system with a mechanical advantage of 3. How much work does the person do lifting the barrel
A cannon tilted up at a 28? angle fires a cannon ball at 70m/s from atop a 22m -high fortress wall. What is the ball's impact speed on the ground below
Suppose that you start with 1.41 mg of a pure radioactive substance and 2.30 h later determine that only 0.252 mg of the substance remains
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