1.Star A is 100 light years from Earth. It is 25 times brighter than star B, an

Question

1.Star A is 100 light years from Earth. It is 25 times brighter than star B, an identical star. How much further is star B than star A from the Earth?

a.50 light years from earth
b.500 light years from earth
c.1000 light years from earth

2.A wave has a period of p s. What is its angular velocity, (w)?

a. p rad/s
b. 2 rad/s
c. 2p rad/s


3.What will happen to the frequency of a mass-spring oscillating system if the amplitude of its oscillation is doubled?

a. nothing
b. it doubles
c. it quadruples
d. it decreases by one-fourth


4.What did geophysicist conclude about the Earth's core based on the evidence that longitudinal waves are detected diametrically across the Earth, but not transverse waves?

a.The earth's core is vibrating
b.The earth's core is empty
c.The earth's core is molten
d.The earth's core has sharp edges

Explanation / Answer

1. b.500 light years from earth 2. b. 2 rad/s 3. a. nothing 4. a.The earth's core is vibrating

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