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You have a ball on a wire that is twirled in a circular orbit with a radius of 3.8 m, and the centripetal force acting on the ball, that has a mass of 60 kg, is 355 N. What is the speed of the ball in orbit? Hint: this is a problem in which you must solve the force equation for the velocity.
A penny of mass 3.1g rests on a small 20g block supported by a spinning disk. The coefficients of friction between the block and disk are 0.75 (static) and 0.64 (kinetic).
Find out the angular velocity
A silt of width a is illuminated bymonochromatic light of wavelength 650nm at normal incidence. Calculate the value of a , when the first minimum falls at an angle of diffracction 30 degree
A high diver of mass 50.0 kg jumps off a board 10.0 m above the water. what average force did the water exert on her
Suppose you have a circuit consisting of a resistance R = 54 ?, an inductor with L = 36.4 mH and internal resistance r = 30 ?, What is the frequency of the damped oscillations of this circuit
An astronaut on the Mars attaches a small brass ball to a 1.00- length of string and makes a simple pendulum. She times 13 complete swings in a time of 35.4 seconds. From this measurement she calculates the acceleration due to gravity on the Mars.
find the arrow's initial speed? How long did it take for the arrow to first reach a height of 17.5 m above its launch point.
A cell membrane is composed of lipid molecules and approximately 10.48 nm thick. If the dielectric constant of the lipid is k = 5, what is the approximate capacitance of a spherical cell that has a diameter of 10.48 mu m?
In an ice show a 65.0 kg skater leaps into the air and is caught by an initially stationary 85.0 kg skater. How much kinetic energy is lost?
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 3.0L in the warm store at 74?F. By how much has the volume decreased
How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than as the car is stationary? The speed of sound is 343 m/s.
Consider a dry air parcel at -12 degrees celsius and 450mb that descends adiabatically down to the surface where p=1000mb, Calculate the potential temperature at the surface
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