If you went to Mars, would you have to wear a space suit? Explain why or why not
What will be an ideal response?
Liquid water cannot survive on the surface of Mars because the air pressure is too low. Any liquid water would immediately boil away; and if you stepped out of a spaceship on Mars without your spacesuit, your body heat would make your blood boil. A further problem is that Mars has no ozone layer to protect its atmosphere from ultraviolet radiation.
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Radioactive Decay: One material used in nuclear bombs is 239Pu, with a half-life of 24,000 years. How long must we wait for a buried stockpile of this substance to decay to 1/1000 of its original activity?
A. 1,200,000 years B. 240,000 years C. 150,000 years D. 82,000 years E. 1500 years
Light travels at a speed of 300,000 km/s. About how far is a light-year?
A) 10 million meters B) 10 billion km C) 300,000 km D) 10 million km E) 10 trillion km
Spherical Mirrors: An object that is 4.00 cm tall is placed 9.0 cm in front of a concave mirror having a focal length of 12.0 cm. What is the location of its image in relation to the mirror and what are its characteristics?
A. 54 cm on the other side of mirror, real, 6.00 times bigger B. 10 cm on the other side of mirror, virtual, 10.0 times bigger C. 18 cm on the same side of mirror, virtual, 2.25 times bigger D. 12 cm on the same side of mirror, real, 6.00 times bigger E. 54 cm on the other side of mirror, virtual, 6.00 times bigger
Where the optic nerve penetrates the eye
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |