Which of the following is considered by biologists to be a likely place where life might have first arisen on Earth?
A) in hot water near undersea volcanoes
B) on meteorites that landed on Earth
C) on land surfaces that got moderately heavy rainfall
D) deep in Earth's core
A) in hot water near undersea volcanoes
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A horizontal uniform 1.20-N meter stick is held up by two vertical strings, one at the 20-cm mark and the other at the 60-cm mark. What is the tension in the string at the 60-cm mark?
a. 0.30 N b. 0.45 N c. 0.60 N d. 0.90 N e. 1.0 N
One hundred meters of a certain type of wire has a resistance of 7.2 
What is the resistance of 2.5 m of this wire?
A. 18
B. 1.8
C. 0.18
D. 3.0
E. 0.30
Which technology was used by the Event Horizon Telescope project to obtain the first image of a black hole?
A) gravitational wave detection B) adaptive optics C) interferometry D) high-speed time monitoring
The velocity of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s2)t - (6.2 m/s3)t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 s?
A) -13 m/s2 B) -15 m/s2 C) 13 m/s2 D) 15 m/s2 E) 0 m/s2