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A submarine of mass 2.1x 103 kg and initially at rest firesa torpedo of mass 260 kg. The torpedo hasan initial speed of 100.1 m/s. What is the initial recoil speed of the submarine in m/s? Neglect the dragforce of the water.
Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 1.5hr at a speed of 5.0 km/hr
An auto race is held on a circular track. A car completes onelap in a time of 21.5 seconds, with an average tangential speeed of38.1 m/s. What is the radius of the track
Two points in a rectangular coordinate system have the coordinates (4.7, 2.5) and (-2.5, 4.7), Determine the distance between these points
A horizontal water main with a cross-sectional area of 208 cm2 necks down to a pipe of area 45.0 cm2. Determine the flow rate through the system
At the instant a traffic light turns green a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. Determine the speed the car when it passes the truck
A ball of mass m is tied to a vertical (Cyclinder) post of radius R. The mass slides on a frictionless, What is the angular momentum of the ball after the string has wrapped once around the post
If an electron-positron pair with a total kinetic energy of 3.50 MeV is produced, find the frequency of the photon that produced the pair
The pilot of an aircraft wishes to fly due west in a 37.70 km/h wind blowing toward the south. The speed of the aircraft in the absence of the wind is 191 km/h.
Sam, who's mass is 79 kg, takes off across level snow in his jet powered skis. The skis have a thrust of 204 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately the skis run out of fuel after only 13 s.
Calculate the cost of running the light bulb you used in lab at 12 volts for one year. Calculate the cost of a MacBook pro labtop to be left on for one year
A man pushes on a piano with mass 180 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 20.0^circ above horizontal floor. Overlook any friction acting on the piano.
question1batman whorsquos mass is 110 kg is holding on to free end of a 5.08 m rope other end of which is fixed to a
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