Which scientific law describes the observation that energy cannot be created or destroyed? Group of answer choices

Law of conservation of energy

Newton's first law of motion

Newton's third law of motion

Law of universal gravitation

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes