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A roller coaster reaches the top of the steepest hill with a speed of 4.0 km/h . It then descends the hill, which is at an average angle of 42 and is 45.0 m long. Estimate its speed when it reaches the bottom.
What is linear charge density of the insulating shell
A certain automobile engine is performing work at the rate of 28300 W (38 hp) with an efficiency of 23%. At what rate is heat being expelled by the engine
If you touch the terminal of a battery, What current will pass through your body if you touch the two terminals of a 9.0 V battery with your two hands
A hot air balloon has just lifted off and is rising at the constant rate of 1.70 m/s. How high is the passenger when the camera reaches her
a plane locked on cruise control flying due east at 300ms but its resultant velocity is 300.66ms at 3.8 south of east.
In a piston cylinder assembly , the pressure and the tempreture of air are 200 KPa and the 500 c initially. The piston cross-sectional area is 0.2 m^2.The air is now cooled. what is the pressure in the cylinder
Lonnie pitches a baseball of mass .20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60-m/s. If the bat is in contact with the ball for .050 s, what is the impulse experienced..
consider the earth/atmosphere/ionosphere as an equivalent RC circuit with a total resistance of 230 ohm and a total capacitance of 2.9F. how long does this amount of discharge take in hours
a 9.40-l container holds a mixture of two gases at 33 degc. the partial pressures of gas a and gas b respectively are
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, Find the expressions for the electric field inside the sphere
A stone thrown horizontally from a height of 5.87 m hits the ground at a distance of 13.90 m. Calculate the initial speed of the stone
A stone is thrown horizontally from the roof of a tall building with a speed of 23.3 m/s. how far from the building will the stone land
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