Which two (2) of the following reaction types is exothermic? CaCl2(s) + 2H20 --> Ca(OH)2 (aq) + 2HCI + heat Jb Melting Ice Oc N2 + O2 + energy --> 2NO Do H2 + 12 --> 2H1 + energy​

What is magnetic flux? explain faraday's law of induction.

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.