A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2. What is the mass of the car?
A) 500 kg
B) 1000 kg
C) 1500 kg
D) 3000 kg
E) none of the above
C
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What does the following element description actually mean?
O
A. an oxygen atom with 6 protons and 12 neutrons B. 18 oxygen molecules with 6 neutrons each C. 6 oxygen atoms with 18 neutrons D. an oxygen atom with 6 neutrons and 12 protons E. none of the above
During the period of European external expansion, the introduction of plants and animals flowed from the Europe to the Americas, but not in the reverse direction
Indicate whether this statement is true or false.
Compared to the use of fossil fuels, wind energy ________
A) requires no investment B) is more consistent C) is not renewable D) produces no exhaust pollutants and contributes little to global climate change
Longwaves in the middle and upper troposphere usually have lengths on the order of
a. a few kilometers. b. tens of kilometers. c. hundreds of kilometers. d. thousands of kilometers. e. millions of kilometers.