In the process of nuclear fusion, large amounts of energy, at temperatures of approximately 120 million kelvin, are required to join two nuclei into a single, heavier nucleus. why does the process of fusion require so much energy in order to take place?
a) to allow the electrons to enter the nucleus
b) to remove the electrons from the electron clouds
c) to cause the two nuclei to slow down and find each other
d) to overcome the electrostatic forces between opposing nuclei

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f