The answer is A. speed
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Answer:
2.98 m/s^2
Explanation:
I have done this before and it was a question on my physics test
Answer:
Oppositely charged objects attract each other
A. is meaningless.
B. is perigee.
C. is apogee.
D. is perihelion.
Answer:Half-life is the amount of time it takes for the initial mass of the isotope to decompose, by half, into other lighter atoms.
Explanation:Different radioactive isotopes have different half-lives. For example, the element technetium-99m has a half life of 6 hours. This means that is 100 kg of the element is left to decay, in 6 hours, 50kg of the mass will have changed into other elements/atoms. The half-life of uranium-238 is 4.5 billion years while that of polonium-216 is only 0.145 seconds.
