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A firefighter directs a horizontal stream of water toward a fire at an angle of 40° measured from the horizontal.
The fire hydrant and hose deliver 91 gallons per minute (1 gal/min = 6.31 cross 10-5 m3/s), and the nozzle projects the water with a speed of 7.3 m/s.
How much horizontal force must the firefighter exert on the hose to keep it stationary?
Find the total capacity, total charge and the voltage across C1 and C2 given C1= 15nF and C2= 25nF are connected in parallel across a 200 volt supply
In a 1-D elastic collision between two pucks on a frictionless air-hockey table, the pre-collision velocity of puck A is v to the right, What is the velocity of each puck after collision
in an 8-ounce glass of water estimate the available d-d fusion energy. for how long could this energy provide the
A 1800 kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
In some places, insect "zappers", with their blue lights, are afamiliar sight on summer nights. These devices use a high voltageto electrocute insects. One such device uses an ac voltage of 4310V, which is obtained from a secondary 120 V outlet by me..
A transformer consists of two coils of wire wound on a common toroidal iron core. What is the induced emf in the second coil
What is the coefficient of kinetic friction between sled and incline? (Enter 0 if sled does not move.)
question a 25g bullet pierces a sand bag 27cm thick. if the initial bullet velocity was 64 ms and it emerged from the
An aluminum wire with a cross-sectional area of 3.9 x 10^(-6) m^2 carries a current of 1.9 A. Find the drift speed of the electrons in the wire
A 0.013 kilogram ball is shot from the plunger of a pinball machine. Because of a centripetal force of 0.027 Newton, Calculate what is the speed of the ball
A 501g mass oscillates with an amplitude of 11.0cm on a spring whose spring constant is 23.0N/m, determine the period and max speed
An acorn falls into a still pond and bobs in the water making a ripple in the pond. It takes 4.00 seconds for the acorn to complete 6.00 full cycles of vertical motion in the water. You too notice that the distance among wave peaks is 15.0 cm. Find t..
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