The atomic number of an atom is defined as which of the following?

A) number of protons

B) mass in grams

C) Mass in amu

D) number of electrons

You are running a 1m/s and increase your velocity to 2.5m/s in 5s. what is your acceleration?

At height h above the surface of Earth, the gravitational acceleration is What is h? Note: The radius of Earth is 6380 km.

How do some atoms of different substances combine chemically to form molecules?

Reflection and abssorption prevent some

How do you explain Newton's third law

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?

Why is there controversy to the opinion that human contribution of carbon dioxide to the atmosphere is cause warming

If the resistance of a circuit increases, that means that the current has to

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate