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A 1/2 in (inside) diameter garden hose is used to fill a round swimming pool 5.42 meter in diameter. Find how many days will it take to fill the pool to a depth of 1 meter if water issues from the hose at a speed of 0.394 meter per second?
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
radiation from a star reaches a planet's surface at an average rate of 2700 w/m^2, Find the force exerted on a roof that has dimensions 10x20 m
Two identical small insulating balls are suspended by separate 0.23-m threads that are attached to a common point on the ceiling, Determine the charge on each ball
If you are designing a lander for Venus in the shape of a hemisphere 2.6m in diameter, how many newtons of inward force must it be prepared to withstand due to the Venusian atmosphere
An automobile club plans to race a 700kg car at the local racetrack. The car needs to be able to travel around several 155m radius curves at 87km/h.
A car drives horizontally off a 86m -high cliff at a speed of 29m/s . Ignore air resistance. How long will it take the car to hit the ground
Particles of charge +75, +48, and - 85 are placed in aline.The center one is 0.35m µC from each of the others. Calculate the net force on each charge due to the other two
How to compute the average force
Object A has a position as a function of time given by A(t) = (3.00 m/s)t + (1.00 m/s2)t2, What is the distance between object A and object B at time t = 4s?
A professor's office door is 0.99 m wide, 2.2 m high, 4.2 cm thick; has a mass of 27 kg, and pivots on frictionless hinges. what is its angular acceleration immediately afterward
Two sinusoidal waves of the same period, with amplitudes of 5.5 and 7.5 mm, travel in the same direction along a stretched string; What is the phase constant of the other wave
A leopard seal jumps onto an uphill ice flow at 7 m/s. The ice is flat but sloped at 30o to the horizontal. Determine how long is it before the seal slides back into the water
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