Name the principle which states that energy cannot be created or destroyed, merely
transferred from one form to another:​

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?