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A 0.76- air cart is attached to a spring and allowed to oscillate. If the displacement of the air cart from equilibrium is x= (10.0cm) cos [(2.00s^-1)t+ pi], find the maximum kinetic energy of the cart. Find the maximum force exerted on it by the spring?
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
A top spinning at 4.00 rev/s comes to a stop in 64.0 seconds. Assume that the top slows down at a constant rate. How many revolutions does it make before coming to a stop
An ice-cube tray contains 0.332 kg of water at 18.5C. How much heat must be removed from the water to cool it to 0 degreesC and freeze it? Express your answer in joules
A cannon is rigidly attached to a carriage, which can move along horizontal rails, but is connected to a post by a large spring, Find the maximum force the spring exerts on the carriage
A 120 V space heater has two power settings. The equivalent resistance at the two settings are 19 ? and a 37 ?, After making a guess, determine the power at the low setting
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 4.88 s after the stone is dropped. How deep is the hole?
A 52.5 g Super Ball travelling at 30 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with wall for 3.25 ms, what is the magnitude of the average acceleration of ball during t..
You are arguing over a cell phone while trailing an unmarked police car by 26.0 m; both your car and the police car are traveling at 120 km/h. what is your speed (in km/h) when you hit the police car
A roller coaster car mass 988 kg is about to roll down a track with a circular loop at the bottom. at what speed does the car reach the top of the loop
Three blocks, each of mass 9 kg are on a frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction, What is the magnitude of the force on block A from the hand
Sam, whose mass is 74 kg, straps on his skis and starts down a 67-m-high, 20 ^\circ frictionless slope. Find Sam's speed at the bottom using work and energy
The rms speed of a sample of gas is increased by 3 percent. What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant?
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