What is the composition of the lunar regolith?
A. olivine and silicon dioxide
B. silicon dioxide and anorthosite
C. anorthosite and basalt
D. basalt and olivine
Answer: C
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What do you think would happen to life on Earth if Earth was hit by a large (1 km or bigger) asteroid or comet?
What will be an ideal response?
Why does a golf ball hit on the Moon travel farther than one hit on Earth? (Neglect air resistance and bad golfers.)
A. The Moon is physically smaller than Earth, so the golf ball only looks like it travels farther. B. The mass of the ball is lower on the Moon, so it is accelerated more easily there. C. The surface gravity is lower on the Moon, so the golf club can be accelerated more easily there. D. The surface gravity is lower on the Moon, so the acceleration of gravity is lower.
Acids give what ions in aqueous solutions?
a. SO42- b. Cl- c. OH- d. H+
The focal lengths of the objective and the eyepiece of a microscope are 0.50 cm and 2.0 cm, respectively, and their separation adjusted for minimum eyestrain (with the final image at the viewer's far point) is 6.0 cm
The near point of the person using the microscope is 25 cm and the far point is infinity. (a) If the microscope is focused on a small object, what is the distance between the object and the objective lens? (b) If the microscope is focused on a small object, what is its final magnification?