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If a negative was introduced and moved from a positive equipotential line toward a negative equipotential line, would the work be positive or negative? Explain please.
A nonconducting solid sphere of radius 8.40 cm has a uniform volume charge density. The magnitude of the electric field at 16.8 cm from the sphere's center is 2.21 103 N/C.
A capacitor is used as energy storge device. the material between the plates of the capacitor has a certain resistance leading to a gradual slef-discharge. What is the fraction of the initial energy lost in the first hour
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, What is the distance between the two aircraft
assume the roller coaster (h1 = 34 m, h2 = 10 m, h3 = 20) passes point A with a speed of 2.00 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point B? The distance traveled is 45m.
A pitcher throws a 0.140 kg baseball, and it approaches the bat at a speed of 30.0 m/s. The bat does Wnc = 60.0 J of work on the ball in hitting it. determine the speed of the ball after the ball leaves the bat
Imagine two Einstein solids in thermal contact. A has 300 atoms and B has 200 atoms, and qtotal = 100, how many macrostates are there
A generator consists of one thousand loops of wire, each enclosing an area 90.cm^2, rotating 50. times per second in a uniform field of 0.15T. Determine the value of effectvie output voltage
A hare and a tortoise compete in a race over a straight course 1.40 km long. The tortoise crawls at a speed of 0.280 m/s toward the finish line. For how long in time was the hare stationary
The cooling circuit of an air conditioning system is a heat exchanger and the outside air passes. The air flow is 40 cubic meters / min, enters a40 ° C, 1.1bar, and exits at 20 ° C, 1 bar.The R-12 enters the tubes with a quality of 40% and 10 º C ..
Two metal spheres are separated by a distance of 1.1 cm and a power supply maintains a constant potential difference of 830 V between them. what is the distance between the spheres
compute the energy level vales such that lasing population inversion occurs between n=2 and n=3 energy level of the lyman series.b) determine the absorption wavelength and the lasing wavelength
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 52.0 m/s, What is the work done on the ball by the racket
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