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A garden hose having an internal diameter of 0.750 in. ( 1.9050 cm ) is connected to a lawn sprinkler that consists merely of an enclosure with 27 holes, each 0.050 in. ( 0.1270 cm ) in diameter. If the water in the hose has a speed of 3.00 ft/s ( 91.440 cm/s ), at what speed does it leave the sprinkler holes?
If wind blows at 32 m/s over a house, what is the net force on the roof if its area is 238 m2 and is flat
A 0.954-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. What is the average current supplied to the car\'s motor
The larger the mass of a star, the shorter its Main Sequence lifetime becomes. Estimat the Main Sequence lifetime of a star with a mass of 6 Msolar
In a test explosion, a detonating hydrogen bomb briefly achieves a temperature of 10 million degrees Kelvin
A charge of +1.80 mC is located at x = 0, y = 0 and a charge of -4.09 mC is located at x = 0, y = 3.16 m. What is the electric potential due to these charges at a point with coordinates x = 4.09 m, y = 0.
A 48.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.44 102 m/s from the top of a cliff 152 m above level ground, How much work has been done on the projectile by air friction
At a distance d (d > L) under the point of suspension there is an infinite plane conductor. Find the frequency of the pendulum, for small amplitudes. You can neglect gravity. What criterion determines that that is valid
Then, calculate the exact number of protons and express the answer in scientific notation with the correct number of significant digits.
Determine the force acting on an electron moving at 2.5 x 10^5 meters per second when it enters a magnetic field perpendicular to its direction of motion
A sinusoidal wave traveling in the positive x-direction has a wavelength of 11 cm, a frequency of 13 Hz, and an amplitude of 19 cm. The part of the wave that is at the origin at t = 0 has a vertical displacement of 6 cm.
Two cars of collide in a glancing collision and stick together. Before the colli- sion the first car (mass of 500 kg) is moving with velocity 25 m/s at an angle of 30%u25E6 North of East, Determine the momentum of each car in a suitable Cartesian c..
A jogger accelerates from rest to 2.12 m/s in 3.34 s. A car accelerates from 24.1 to 38.6 m/s also in 3.34 s. Find the magnitude of the acceleration of the jogger
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