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

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space