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A concave mirror forms an image on a screen twice as large as the object. Both the object and the screen are then moved to produce an image on the screen that is three times the size of the object. If the screen is moved 75 cm in the process, how far is the object moved?
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
A 1700 kg car travelling at a speed of 15m/s skids to a halt on wet concrete where f_k =.5. How long is the cars skid marks.
A car with a mass of 1600 kg is initially traveling at 72 m/s. Find the energy required to stop the car
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction, Find the direction of the third force acting on the object
An ideal monatomic gas is contained in a vessel of constant volume 0.340 m3. The initial temperature and pressure of the gas are 300 K and 5.00 atm, Find the specific heat of the gas
A thin layer of fluid to be identified by its index of refraction is poured into a very shallow container. what are the possible values for the index of refraction
A 1200 kg boat is traveling at 80 km/h when its engine is shut off. The magnitude of the frictional force fk between boat, Find the time required for the boat to slow down to 40 km/h
A farmer planted a field of Bt 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 22 ears in 1/1000 of an acre. He determines that each ear has about 700 kernels on average. He also knows that the bushel contains abou..
A 140 g ball moving at 0.35 m/s in the + x-direction is subject to a 0.20 N force in the - y-direction for 2.0 s, Find the magnitude of the ball's momentum change
A radio antenna broadcasts a 1.0 MHz radio wave with 29kW of power. What is the wave's intensity 33km from the antenna
When diving for prey, bald eagles can reach speeds of 200 mph (322 km/h). Suppose a 6.0kg eagle flying horizontally at 322 km/h suddenly grasps, What's the eagle's speed just after grasping the rabbit
When a 24 Ohm resisotr is connected across a 12 Volt Battery, a current of 482 ma flows. What is the power delivered by the emf of the battery
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