A boy on a sled is pushed by his friend with a force of 15 N and he accelerates to 4.1 m/s2 after 5 m. Then the boy and his sister both sit on the sled and the friend again pushes with a force of 15 N and they accelerate to 2.1 m/s2 after 5 m. How does this support Newton’s 2nd Law of Motion? Answer in at least 3 sentences.

A+b→2c when the reaction begins, the researcher records that the rate of reaction is such that 1 mole of a is consumed per minute. after making changes to the reaction, the researcher notes that 2 moles of a are consumed per minute. what change could the researcher have made to effect this change?

Compare and contrast physical changes with chemical changes.

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.