Shapley found the distance to the center of the galaxy by studying the distance to open clusters
Indicate whether the statement is true or false
F
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A container of water is placed on a scale, and the scale reads 120. g. Now a 20.0g piece of copper (specific gravity = 8.90 ) is suspended from a thread and lowered into the water, not touching the bottom of the container
What will the scale now read? A) 140 g B) 120 g C) 138 g D) 122 g E) 112 g
Mass on a Spring: A 0.16-kg block on a horizontal frictionless surface is attached to an ideal spring whose force constant (spring constant) is 360 N/m. The block is pulled from its equilibrium position at x = 0.000 m to a position x = +0.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis. When the position is x = -0.037 m, what is the acceleration of the block?
A. 83 m/s2 B. 43 m/s2 C. 64 m/s2 D. 270 m/s2 E. 370 m/s2
If VA ? VB = 50 V, how much energy is stored in the 36-?F capacitor?
a. 50 mJ
b. 28 mJ
c. 13 mJ
d. 8.9 mJ
e. 17 mJ
When gas in a container is squeezed to half its volume, its density is
1) halved, 2) unchanged, 3) doubled, 4) quadrupled, and neglecting any temperature changes we would find the gas pressure to be 5) halved. 6) unchanged. 7) doubled. 8) quadrupled.