What trajectory would a positive ion follow moving in a magnetic field that increases linearly with time?

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

In positive numbers less than 1, the zeros between the decimal point and non zero are significant