An electric heater is used to boil small amounts of water and consists of a 18-ω coil that is immersed directly in the water. it operates from a 120-v socket. how much time is required for the heater to raise the temperature of 0.71 kg of water from 15 °c to the normal boiling point? take the specific heat capacity of water to be 4186 j/(kg·c°).

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Write a polynomial function with the given zeros x= -1,0,2show your work

The smallest particle of an element that retains its identity in a chemical reaction. true or false