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An airplane must have a velocity of 50 m/s in order to take off What must be the airplane acceleration if it is in to take off from a runway 50cm long?
A common belief is that a hole in a jet plane can suck a person out. On an episode of the popular TV series Myth Busters, hosts Adam and Jaime attempted to find whether this is possible. Obtain the force exerted on such a window as the plane flies ..
A 120-V motor has mechanical power output of 3.00 hp. It is 88.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
The resistance and the magnitude of the current depend on the path that the current takes. The drawing shows three situations in which the current takes different paths through a piece of material. Each of the rectangular pieces is made from a mat..
a train travels due south at 30 ms relative to the ground in a rain that is blown toward the south by the wind. the
You are standing 1.9m from a 130W- lightbulb. If the pupil of your eye is a circle 5.0mm in diameter, how much energy enters your eye per second
A bomb at rest explodes, breaking into three pieces. Two of the pieces have equal mass and fly off at 60° to one another with the speed of 100 m/s. What are the magnitude and the direction of the third piece
A girl of mass m is taking a picnic lunch to her grandmother. She ties a rope of length R to a tree branch over a creek, What is the minimum breaking tension for the rope
particle 1 with mass 6.0 u and charge 4e and particle 2 with mass 8.0 u and charge 6e have the same kinetic energy and
Three uniform sticks, each of mass , are placed on the floor as follows: stick 1 lies along the axis from = 0 to = 2.0 , stick 2 lies along the axis from = 0 to = 2.0 , stick 3 lies along the axis from = 2.0 to =4.0 .
An object at rest explodes into three pieces. Two of them are equal in mass and break off at an angle of 88.7° to each other, both by a speed of 33.4 m/s. The last piece has 4 times as much mass as each of the other pieces. What is the magnitude of t..
A 2.0 µF capacitor and a 4.0 µF capacitor are connected in parallel across a 270 V potential difference. Calculate the total energy in joules stored in the capacitors
A steel bar is clamped at both ends. The bar is 20 m long. Draw the fundamental, and the second and third harmonics of the standing wave. Determine what are the three wavelengths
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