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Alissa, who has a mass of 60 kg, can run up a flight of stairs in 12 seconds. If the vertical height of the stairs is 15 meters, a) how much work does she do? b) How much horsepower does she exert?
A 2.33 k? resistor is in series with a 1.80 ?F capacitor in an AC circuit. The rms voltages across the two are the same. What fraction of the source voltage are each of the rms voltages?
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 2.20 mm. Calculate the surface charge density
A car of mass 1450 kg traveling at 26 m/s is at the foot of a hill that rises 140 m in 2.4 km. Find the average power delivered by the car's engine
If you did an experiment and measured g to be 9.3 m/s2, and the accepted value is 9.81 m/s2, what was your percent error
A ball of mass m traveling horizontally with velocity v strikes a massive vertical wall and rebounds back along its original direction with no change in speed. What is the magnitude of the impulse delivered by the wall to the ball?
Find the final velocity of the two balls if the ball with velocity v2i = ?20.9 cm/s has a mass equal to half that of the ball with initial velocity v1i = +32.1 cm/s. (Indicate the direction with the sign of your answer.)
Two charged particles areprojected in the same direction into a magnetic field perpendicularto their velocities. If the particles are deflected in oppositedirections, what can be said about them?
A 900 kg car enters an unbanked curve with a radius oof 75.0 m. The coefficient of static friction between the tires and roadbed iis .20. what is the maximum speed with which the car can safely negotiate
Find the magnitude of the potential difference between two points located 1.1m apart in a uniform 630 N/C electric field
A car slows down uniformly from a speed of 30.0m/s to rest in 7.80s. How far did it travel in that time
A 2000kg car traveling at a speed of 12m/s skids to a halt on wet concrete where ?k = 0.50. How long are the skid marks
a vertical concrete dam is built in the ravine between two hills. The face of the dam slopes equally on both sides at an angle of 45.0o to the horizontal. Find the horizontal force on the dam just due to the water
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