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A train travels due south at 30 m/s (relative to the ground) in a rain that is blown toward the south by the wind. The path of each raindrop makes an angle of 69° with the vertical, as measured by an observer stationary on the ground. An observer on the train, however, sees the drops fall perfectly vertically. Determine the speed of the raindrops relative to the ground.
A 120 m long copper wire (resistivity 1.68e-8 Ohm*m) has resistance 6 Ohm. What is the diameter of the wire
What is speed of the second train, which travels faster
A vertical tube that is closed at the upper end and open at the lower end contains an air pocket. The open end of the tube is under the water of a lake. What is the volume of the air pocket under these conditions
Jane ( 50 kg) and John ( 30 kg ) sit at opposite ends of a 5.0 m long boat (20 kg). Jane is on the left, John is on the right. When they trade sides, how far and in what direction does the boat move relative to where Jane was origin
A lady is pulling her luggage that has a mass of 24 kg. What is the total power exerted on the luggage by the lady
A factory worker pushes a 30.0kg crate a distance of 4.4 m along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. What is the total work done on the crate
Matthew holds a 50 lbs dumbbell in his hand with his elbow flexed at 90 degrees. His forearm is parallel with the ground. What is the torque created by the dumbbell about the elbow joint
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
A block is given an initial velocity of 7.0 m/s up a frictionless 24 degree incline. find the block's acceleration as it slides up the plane
A particle moving along a 2-d x-y plane has its velocity described by the functions: Vx=2t^2, what is the acceleration of the particle
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, What is the speed and direction of the third piece
Assume that Newton's law of universal gravitation can be applied to these two students and find the gravitational force (in Newtons) that one student exerts on the other when they are separated by 0.493 m. Consider entering the answer using scient..
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