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A 2.3-kg cart is rolling along a frictionless, horizontal track towards a 1.6-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is +5.8 m/s, and the second cart's velocity is -2.0 m/s. (a) What is the total momentum of the system of the two carts at this instant? (b) What was the velocity of the first cart when the second cart was still at rest?
A right triangle has a hypotenuse of length 2.90 m, and one of its angles is 38.0°. What are the lengths of the following sides. a: the side opposite the 38.0° angle b: the side adjacent to the 38.0° angle
At a distance of several kilometers from a radio transmitter, the electric field of the emitted radio wave has a magnitude of 0.12 V/m at one instant of time
In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, find the magnitude of the impulse on him from the snow
A 1.23-kg box slides up an incline plane with a speed of 8.6 m/s. how long will it take for the box to come to rest
A square loop of wire with dimensions L x L lies in the xy plane, moving along the x direction with a speed v. Find the induced emf as the loop moves from one region to the next
A paperweight, when weighed in air, has a weight of W = 7.3 N. When completely immersed in water, Find the volume of the paperweight
An electromagnetic plane wave at a certain location has an electric field pointed up which is given as a function of time as E = 54 V/m × sin (6x106 Hz × t). What is the Poynting vector at this location for this wave as a function of time
A machine shop has 100 equally noisy machines that together produce an intensity level of 90db. If the intensity level must be reduced to 80db, how many machines must be turned off
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. how many photons does the laser emit at 532nm in 3 minutes
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 2.32 m/s. Ignore frictional losses. What is the translational speed of the frozen juice can when it reaches the bottom
When a certain photoelectric material is illuminated with red light (?=715) and then blue light (?=400), calculate the work function of the material
The rms speed of a sample of gas is increased by 3 percent. What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant?
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