If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is
A) 3 m/s2.
B) 6 m/s2.
C) 60 m/s2.
D) 600 m/s2.
Answer: B
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Which of the following is a main sequence star hotter than the Sun? (Note: the Sun is a G2V star.)
A. O2II B. G1II C. K2V D. G1V E. G2III
Which characteristic of Earth explains why we have an ultraviolet-absorbing stratosphere?
A) the existence of photosynthetic life B) the existence of plate tectonics C) the moderate surface temperature D) the existence of oceans
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 10^3 kg/m3.)
a. 1.05 cm b. 1.15 cm c. 1.45 cm d. 1.65 cm e. 1.35 cm
State the scale of your topographic map in units of inches per mile; that is, one inch equals how many miles?