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Question1

Protons and electrons can be given extremely high energies in particle accelerators. What is wavelength in meters of an electron (mass = 9.11 x 10-31 kg) that has been accelerated to 99 percent of speed of light? In what region of the electromagnetic spectrum is this wavelength?

Question2

Two equal positive point charges q1=q2=2.0C are located at x=0,y=0.30m and x=0,y=-0.30m, respectively. What are magnitude and direction of the total (net) electric force that these charges exert on a third point charge Q=4.0C at x=6,y=8?

Question3

A layer of benzene (n = 1.50) 2.60 cm deep floats on water (n = 1.33) that is 6.50 cm deep. What is the apparent distance from the upper benzene surface to bottom of the water layer when it is viewed at normal incidence?

1) 3.45 cm

2) 6.62 cm

3) 66.2 cm

4) 345 cm

5) 662 cm

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