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Q. At one point in a pipeline, the water's speed is 3.00m/s and the gauge pressure is 4.00×10^4 Pa. Find the gauge pressure at a second point in the line 11.0m lower than the first if the pipe diameter at the second point is twice that at the first.
Q. Two pellets, each with charge 3 microcoulomb (1 microcoulomb = 0.000001 coulombs), are located 0.5 m appart. What is the electrical force between the charges?
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
A 10 runaway grocery cart runs into the spring with spring constant 230 and compresses it by 65. What was the speed of the cart right before it hit the spring.
A 2100 kg car moving east at 10 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35 ° north of east and at a speed of 5.03 m/s. Find the speed of the 3000 kg car before th..
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field.
The front 1.20 m of a 1600 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision.
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
Five equal negative point charges -q are placed symmetrically around a circle of radius R as shown. Use a rough approximation to express the magnitude of electric field E at a point on the positive x axis a distance R from the center of the circle..
How many kilocalories of heat are produced when the brakes are used to bring a 930 kg car to rest from a speed of 102 km/h.
This is because of the average release of about 0.03 J per kilogram each year. Show that at 500 C increase in temperature for a thermally insulated chunk of granite takes about 13.3 million years. (Assume that the specific heat of capacity c of g..
A uniform-density 8 kg disk of radius 0.27 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 39 N by a distance of 0.7 m. Now ..
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