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Your car's fuel efficiency is e = 26 miles per gallon. The fuel pump pulls fuel from the tank at the same speed vat which the car itself moves (so if the car is moving 1 mile per hour, the fuel moves through the pump at 1 miles per hour). The fuel pump pulls fuel at speed v through a hose with cross-sectional area A.
What is the cross-sectional area of the hose in square inches? What is it in square millimeters? (1 gallon =231 in3. You need to find the volume of fuel pumped per time in terms of v and A Fuel efficiency is distance traveled per fuel pumped, which is equal to speed v divided by fuel pumped per time. The time dependence cancels out. Fuel efficiency has units distance per volume.)
Your pet bats, Joe, Bob and Curly love coffee. unfortunately, after their Saturday morning cups of coffee, you are horrified to learn that the coffee is laced with radioactive isotope Y. Opening the window to let in some air 1 day later, two of your ..
A space station has a diameter of 1000 ft (300 m) and to rotate at a rate sufficient to cause occupants in the outer rings to experience a centripetal force roughly equal to the gravitational force of the moon
A hydrogen atom in the ground state absorbs a 13.06eV photon. find the wavelength of the photon emitted in this quantum jump
a square plate of copper with 54.0 cm sides has no net charge and is placed in a region of uniform electric field of
During a wicked thunderstorm, Sam sees two bolts of lightning simultaneously strike two points 5.66 m apart. how far apart do the two lightning bolts strike
A wire has a resistance of 60.0 ohms, and is bent into a square loop with sides of length 15.0 cm. The loop is perpendicular to a magnetic field which is changing at a rate of 4.000e-3 T/s. What is the current induced in the wire?
A 3.1 kg dog stands on a 15.00 kg flatboat at distance D = 6.1 m from the shore. It walks 2.00 m along the boat toward shore and then stops. Assume no friction between the boat and the water, find how far the dog is then from the shore.
A tennis player hits a ball 2.0 m above the ground. The ball leaves his racquet with a speed of 23.0 m/s at an angle 5.5 degrees above the horizontal. By how much does the ball clear the net
A 1.10 kg hollowball with a radius of 0.134 m, filled with air, is released fromrest at depth of 2.16 m in a pool of water. What is the work done by the net vertical force on the ball as the ball moves from the bottom of thepool to the surface
A 61.0kg skater moving initially at 3.78m/s on rough horizontal ice comes to rest uniformly in 3.24s due to friction from the ice
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
A research submarine has a 10-cm-diameter window that is 8.5cm thick. What is the submarine's maximum safe depth in salt water
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