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A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. To hose needs to supply 250 kg( about 60 gallons ) of water per minute and the water needs to leave the hose at speed of 12.0 m/s. A water pump supplies the energy to move the water.
a) How much work is done per minute in lifting the water from the ground?
b) How much work is done per minute creating the kinetic energy it has when leaving the hose?
c) what must be the pump's power output?
An artillery shell is fired with an initial velocity of 300 m/s at 51.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 47.0 s after firing. Illustrate what are the x and y coordinates of the shell where it explodes, re..
What is the magnitude of the average force of the bat on the ball throughout the ball-bat contact.
A vertical containery with base area measuring 14.0 cm by 17.0 cm is being filled with identical pieces of candy, each witha volume of 46.0 mm3 and a mass of 0.0208 g.
An athlete starts at point A and runs at a constant speed of 7.00 m/s around a round track 250 m in diameter? Find the x component of this runner's average velocity between points A and B.
What is the direction of this velocity. What is the magnitude of the velocity.
A typical red blood cell subtends an angle of only 1.91E-5 rad while viewed at a person's near-point distance of 25cm. Assume a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance o..
A carbon dioxide laser emits a sinusoidal electromagnetic wave that travels in vacuum in the negative x-direction, Write vector equations for E and B as functions of time and position
suppose that the gold ions carry one elementary unit of positive charge.
Two identical point charges are fixed distance from one another. If one of their charges was doubled an the other was halved, how would the electric force be affected.
compute how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
After going through a bad break-up with your significant other you end up drinking half a case of beer. The next day you decide the cloud of despair must be fought with exercise. How much longer will it take you to burn off the calories of the bee..
What is speed of the wind what is coefficient of static friction
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