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Two electrically charged pith balls, each having a mass of 0.15 g, are suspended from light threads of equal length. Determine the magnitude of the horizontal repulsive force, F, acting on each ball if the measured distance between them is . r = 200 m
Your average speed on the first half of a car trip is 75.0 km/h. How fast do you have to drive on the second half of the trip to achieve an average speed of 83.0 km/h for the whole trip
If water at 15°C is flowing through a 3cm diameter pipe with a velocity of 50 cm-1, calculate the Reynolds number. Is the flow turbulent or laminar?
A car's starter motor draws 59A from the car's battery during startup. If the startup time is 3.5s, How many electrons pass a given location in the circuit during that time
the working substance of an engine is 1.00 mol of a diatomic ideal gas. the engine operates in a cycle consisting of
The radius of a black hole is approximately 3 km times the mass of the black hole in solar mass units. If a galactic black hole has a mass of 1 million solar masses what is its diameter in A.U.s? For an accretion disk 10 times the radius of this blac..
If the coefficient of static friction between the coffee cup and the roof of the car is 0.29, what is the maximum acceleration the car can have without causing the cup to slide? Ignore the effects of air resistance
.5 kg glider, attached to the end of the ideal spring with force constant k=450 N/m, undergoes SHM with amplitude of 0.04 m. Compute: The maximum speed of the glider; The total mechanical energy of the glider
A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. find the magnitude of the pulling force exerted by his wife
Monochromatic light is incident on a soap fil (n=1.4) from air (n=1.0). What is the appearance of the film in reflected light as the thickness of the film approaches zero
A simple pendulum has period T on the surface of Earth. When taken to planet X, the same planet has period 2T. If the radius of planet X is half the radius of Earth, what is the mass of planet X, relative to mass of the planet Earth?
Four objects are situated along the y axis as follows: a 2.73 kg object is at +2.37 m, a 1.86 kg object is at +3.50 m, a 2.46 kg object is at the origin, and a 3.68 kg object is at -0.610 m. Where is the center of gravity of this system?
In a baseball game, the catcher stops a 35 m/s pitch. How much net work is done on the baseball as it is caught? what average force did the mitt exert on the ball
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