The acceleration of gravity on the moon is only one-sixth of that on Earth. If you hit a baseball on the moon with the same effort (and at the speed and angle) that you would on Earth, the ball would travel
A) one-sixth as far.
B) 36 times as far.
C) the same distance away.
D) 6 times as far.
E) as far.
D
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The limiting angle of resolution for the eye is 1.4 × 10-4 rad. What is the minimum separation between two point sources of light that the eye can distinguish if they are at a distance of 40 m from the observer?
A) 2.8 × 10-3 m B) 5.6 × 10-3 m C) 1.4 × 10-3 m D) 8.4 × 10-3 m E) 4.7 × 10-3 m
Thin Films: A 360-nm thick oil film floats on the surface of a pool of water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. When the surface of the oil is illuminated from above at normal incidence with white light, what is the wavelength of light between 400 nm to 800 nm wavelength that is most weakly reflected?
A. 520 nm B. 540 nm C. 560 nm D. 580 nm E. 600 nm
What is the meaning of the expression ?F = 0?
What will be an ideal response?
Explain how "forbidden" lines appear in spectra of emission nebulae
What will be an ideal response?