What is the specific heat of sodium metal if 123 J are needed to raise the temperature of 4.00 g sodium by 25.0 °C?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

What are two different ways you could find the value of a? explain these methods.

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.