Eight coulombs of charge flow past the center of a wire in 5 seconds. What is th

Question

Eight coulombs of charge flow past the center of a wire in 5 seconds. What is the value of the current in the wire? Write down the expression (equation) for power in terms of electric current Two bar magnets are lined up so that the North pole of one magnet faces the South pole of the other magnet. The magnets will repel. (True/False) The United Nations exploration team on Mars sends hack signals to Earth via radio waves. The signals travel at the speed of: a) light, b) sound, c) a high speed jet plane. You wish to determine the direction of the magnetic field lines at a point in space. so at that point you place a. a) charge. b)mass. c) compass, d) scale. The definition of average acceleration is that a certain quantity changes in time. What is that quantity? According to the Law of Reflection, when light reflects off of a mirror. " The angle of reflection is equal to the..." (You may make a diagram if this will help.) A rose looks red because the rose: a) reflects red light only, b) absorbs red light only, c) is transparent to red light only. White light is composed of light of all colors. (True/False) The index of refraction of water is 1.333. If the speed of light in vacuum is 300.000 km/see, what is the speed of light in water? Other than a magnet, (or the Earth itself) what will produce a magnetic field in the laboratory? (respond with a physical quantity, not with a device or a particle or a wave) The electromagnetic spectrum includes many different kinds of waves. These waves are all different because they have different: a) speeds, b) colors, c) amplitudes, d) wavelengths. A light ray going from air to glass changes direction because: a) glass has a gravitational attraction for light, b) magnetic forces in glass affect light rays, c) light goes slower in glass than in air. Cell phones use microwaves (EM waves). Can a cell phone next to your head cause brain cancer? a) definitely no. b) definitely yes, c) it is unknown if it does or doesn't. In a rainbow what is it that separates sunlight into the various colors? a) different air densities. b)thc Sun. c) water droplets, d) layers of hot and cold air.

Explanation / Answer

36) 8/5=1.6amp

37)power= I^2*R

38)false

39)a

40)c

41)Velocity

42)angle of incidence

43)a

44)true

45)300000/1.333

46)electric current

47)d

48)c

49)a

50)c

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