The wavelength of a periodic wave is 0.750 m. If the frequency is 365 Hz, then what is the angular frequency, of the wave?

A.

B.

C.

D.

E.


D.

Physics & Space Science

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From lowest energy to highest energy, which of the following correctly orders the different regions of electromagnetic radiation?

A) infrared, visible light, ultraviolet, x-rays, gamma rays, radio B) radio, infrared, visible light, ultraviolet, x-rays, gamma rays C) visible light, infrared, x-rays, ultraviolet, gamma rays, radio D) gamma rays, x-rays, visible light, ultraviolet, infrared, radio E) radio, x-rays, visible light, ultraviolet, infrared, gamma rays

Physics & Space Science

A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the z axis from z = 0 to z = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?

a. 1.0 N b. 5.0 N c. 2.0 N d. 3.6 N e. 3.0 N

Physics & Space Science

Consider three galaxies, Alpha, Beta and Gamma. An astronomer in Beta sees each of the other two galaxies moving away from her in opposite directions at 0.70c. At what speed would an observer in Alpha see the galaxy Beta moving?

A) 0.82c B) 0.70c C) 0.94c D) 0.35c E) 0.57c

Physics & Space Science

What is the steady state rate of heat flow through a pane of glass that is 40.0 cm by 30.0 cm with a thickness of 4.00 mm when the outside temperature of the glass is -10.0°C

and its inside temperature is 25.0°C? The thermal conductivity of glass is 0.105 W/(m?K), the specific heat of glass is 0.180 cal/(g?°C), and 1 cal = 4.190 J. A) 24.2 W B) 3.81 W C) 18.6 W D) 47.3 W E) 110 W

Physics & Space Science