The properties of element 17 are most similar to which of the following elements? Bromine

Sulfur

Argon

Lithium

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f