A lava flow radiometrically dated at 300 million years lies just below sedimentary layer A and just above sedimentary layer B. What can be said of the ages of beds A and B?
Layer A is younger than 300 million years, whereas layer B is older than 300 million years.
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Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space
They have identical speeds of 0.600c. The satellites collide and stick together. What is the rest mass of the combined object after the collision? A) 200 kg B) 225 kg C) 250 kg D) 275 kg E) 300 kg
The weak force that acts between an electron and a quark is caused by the exchange of
a. photons. b. gluons. c. gravitons. d. W+, W–, or Z0 bosons.
The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D
Earth's axis is tilted by ________ degrees relative to the Celestial Equator.
A. 25 B. 23.5 C. 66.5 D. 11 E. 32.5