A car headlight and an interior dome light use the same voltage, but the headlight consumes much more power because

a. its resistance is lower.
b. the current in it is larger.
c. it uses energy faster.
d. all of the above

d

Physics & Space Science

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Briefly explain how Uranus and Neptune were discovered

What will be an ideal response?

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Physics & Space Science

One major difference between Young's double slit interference experiment with light and Jonsson's similar experiment with electrons is that

A. the electrons exhibited an interference pattern only characteristic of particles and the light exhibited an interference pattern only characteristic of waves. B. the light must be at low intensity to produce the interference pattern while the electrons could be propelled onto the slits at very high frequency and still produce the pattern. C.the wavelengths of the electrons were much smaller than that of light and therefore the slits for the electron experiment were much more difficult to produce. D. For the electrons, the slit widths could be larger than for those of photons because of the electrons' larger momenta.

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Physics & Space Science

At what speed would an astronaut need to travel so that he would age 4.20 years while traveling a distance of 4.20 ly as measured by a stationary observer?

A. 1.00 c B. This cannot be done. C. 1.00 c/2 D. .707 c E. .750 c

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Physics & Space Science

A 2000 kg car is traveling on a banked curved icy road without sliding. The velocity of the car is 32.0 m/s and the road is banked at an angle of 20.0 degrees. The radius of curvature of the road is

A. 125 m. B. 210 m. C. 287 m. D. 310 m. E. 350 m.

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Physics & Space Science