Which of the following methods allows us to determine the size of an extrasolar planet around another star?
A) detection of brightness changes in a star as a planet passes in front of it
B) detection of reflected starlight
C) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky
D) detection of Doppler shifts in the spectra of the parent stars
A
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Determine the work done by 5 moles of an ideal gas that is kept at 100°C in an expansion from 1 liter to 5 liters
a. 2.5 × 10^4 J b. 1.1 × 10^4 J c. 6.7 × 10^3 J d. 2.9 × 10^3 J e. 8.4 × 10^3 J
The first stage of Earth's evolution is _____
A) cratering B) basin formation C) differentiation D) slow surface evolution
When a particle and antiparticle meet, they are said to annihilate each other. What does this mean?
a. They explode into tiny fragments. b. They are destroyed, and turned into an equivalent amount of energy. c. They merge and simply disappear. d. none of the above
Two particles that will be deflected by a magnetic field are __________ and __________
Fill in the blank(s) with correct word