URGENT PLZ HELP Which of the following is true for an exothermic reaction?

a. ΔH is positive, ΔT is positive

b. ΔH is positive, ΔT is negative

c. ΔH is negative, ΔT is positive

d. ΔH is negative, ΔT is negative

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d