Two identical fish, both at sea level, float in two identical aquariums with identical quantities of water. Fish A is in Alaska, so it weighs more than fish B at the equator, since g is larger at sea level in Alaska. Which statement is correct?
a. A comparison is impossible unless they are both floating at the same level.
b. Fish A displaces a greater quantity of water than fish B.
c. Fish B displaces a greater quantity of water than fish A.
d. They both displace the same quantity of water.
e. Fish A has a smaller acceleration than Fish B when equal horizontal forces are applied to each, because Fish A weighs more.
d
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This figure shows idealized thermal radiation spectra from several stars and a human. Based on this graph, at about what wavelength does a 15,000 K star emit its most intense light?
A) about 100 nanometers B) about 1,000 nanometers C) about 20 nanometers D) about 100,000 nanometers
The positron was discovered by which of the following physicist
Two particles, each of charge 2.5 × 10^–19 C, are 4.8 × 10^–5 m apart. What is the change in potential energy if they are brought 2.4 × 10^–5 m closer together? (ke = 8.99 × 10^9 N·m2/C2)
a. 1.2E–23 J b. 4.7E–24 J c. 2.3E–16 J d. 1.4E–15 J e. 2.9E–20 J
Three point charges are located on the x-axis. The first charge, 
is at x = -1.00 m; the second charge, 
is at the origin; and the third charge,
is located at x = 2.00 m. What is the force on 
?
A. 1.65 N in the negative x-direction B. 3.15 N in the positive x-direction C. 1.50 N in the negative x-direction D. 4.80 N in the positive x-direction E. 4.65 N in the negative x-direction