Minimum coefficient of static friction based problem
A girl stands on a rotating merry-go-round, 2.3 m from its center. If the girl has a speed of 2.2 m/s, what is the minimum coefficient of static friction between her feet and the merry-go-round that will prevent her from slipping?
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What is the probability of a spinner with 4 even colors landing on the same color 5 or fewer times in 10 spins?
Heat loss from the nozzle per unit mass of steam are estimated to be 1.2 Btu/lbm. Determine the exit temperature of the steam.
(a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to make one revolution?
Kinetic and potential energy changes from the intlet to exit can be neglected. Determine the compressor power, in hp, and the volumetric flow rate at the exit in units of ft^3/min.
find the apparent weight of a 54-kg person in the roller coaster as it passes over the top of the hill. The apparent weight is how heavy the person feels, which is determined in this case by the normal force.
A 10 cubic foot tank is initially evacuated and is then filled from a supply line which contains R-22 at 100 psi, 100 F. Assuming no significant heat transfer.
The atmospheric sulfur dioxide (SO2) concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume that the dissolution of SO2 does not affect its pressure.
R-22, flowing steadily at 70 lbm/hr, enters the expansion valve of a refrigeration system as a saturated liquid at 183.09 psia. At the exit of the valve, the pressure is 31.162 psia.
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