With respect to the earth, object 1 is moving at speed 0.90 c to the right. Object 2 is moving to the left at speed 0.70 c with respect to object 1. How fast is object 2 moving with respect to the earth?
A)
0.12 c
B)
-0.20 c
C)
0.54 c
D)
0.20 c
E)
1.6 c
C
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In the diagram, each resistor is 3 ohms and the battery is 9 volts. What is the current through the middle resistor?
A. 3 A to the right
B. 3 A to the left
C. 9 A to the right
D. 9 A to the left
E. 1 A to the left
Each atom in a sample of lithium (Z=3, atomic mass 6.941 u) has all of its electrons removed. If exactly 1.0 C was collected in this way, what is the mass of the lithium sample?
A. 0.010 ?g B. 0.024 ?g C. 0.031 ?g D. 0.072 ?g
In the two-slit experiment, monochromatic light of frequency 5.00 × 1014 Hz passes through a pair of slits separated by 2.20 × 10-5 m. (c = 3.00 × 108 m/s)
(a) At what angle away from the central bright spot does the third bright fringe past the central bright spot occur? (b) At what angle does the second dark fringe occur?
_________________ refers to the ability of a telescope to produce bright images
Fill in the blank(s) with correct word