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A 47.1 kilogram girl is standing on a 162 kilogram plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.49 meter per second relative to the ice surface in the direction of the positive x-axis.
Determine the velocity of the plank relative to ice surface?
Find the velocity of the girl relative to the plank?
a rock is dropped into a deep hole and 2.5 s later the sound of striking the bottom is heard. if the speed of sound is
A nerve fiber (axon) may be approximate as a long cylinder. what is the resistance of a 0.3-m long fiber
Two spherical objects with a mass of 8.99 kilogram each are located at a distance of 3.15 meter apart. Obtain how many electrons need to leave each object thus that the net force between them becomes zero
The Flux of the E-Field is a scalar. If the net charge enclosed by a Gaussian Surface is zero, then byGauss' Law, the E-Field is zero at all points on the surface.
A car of mass m is initially moving with a velocity v. Find the time that it takes for the car to come to rest
In an American football game, a 90.4 kilogram fullback running east with a speed of 5.07 m/s is tackled by a 94.0 kilogram opponent running north with a speed of 2.99 m/s. Obtain the mechanical energy lost as a result of the collision
A sphere that is a perfect blackbody radiator has a radius of 0.140 m and is at 250°C in a room where the temperature is 27°C. find the net rate at which the sphere radiates energy.
A wire 30 centimeter long with an east-west orientation carries a current of 3 Amp eastward. evaluate the direction and magnitude of the magnetic field
the phone lines to an airline reservation system are occupied 40 of the time. assume theevents that the lines are
A 2.5 kOHM and a .5kOHM resistor are connected in parallel; this combination is connected in series with a .583kOHM resistor. find the maximum voltage that can be applied by the battery
If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.
A 30.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 21.0 m. What force does the seat exert on the child
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