How does the presence of a catalyst affect the activation energy of a reaction?

Suppose Galileo dropped a lead ball (100 kilograms) and a glass ball (1 kilogram) from the Leaning Tower of Pisa. Which one hit the ground first? (Assume that there is no air resistance.) A. lead ball B. glass ball C. both at the same time D.

It's for a cross word and mechanical doesn't fit ☹️ This is a method by which a wave travels through a medium or a vacuum

Explain why it can hurt your hands when you carry heavy shopping in carrier bags.

What are two forces that are not equal in size?

What must differ between the atom of two different elements? Question 6 options: protons in the atom electrons in the atom neutrons in the atom protons and neutrons in the nucleus

A tug-of-war game is played by five c/hildren: three on one team and two on the other. How much force will the two child team have to exert against the three child team in order to hold the rope steady if the three children opposing them exert

True or false is the transformation of chemical energy to radiant and thermal energy when a flashlight is turned on is an example of inefficiency

Why do astronomers say that we are seeing the big bang with observations of the cosmic microwave background? Explain how such observations are powerful evidence in support of the big bang theory

Whats a meteroligist

The impulse given to a ball with mass of 4 kg is 16 N s. If the ball starts from rest, what is its final velocity?