Which is an example of a chemical change? A) glass melts in a furnace B) liquid water boils into steam C) newspaper decays in a landfill D) rain condenses and falls from water vapor in a cloud

An airplane starts from A and flies to B at a constant speed. After reaching B it returns to A at the same speed. There was no wind.

Ground-based radio telescopes can collect data from distant objects in space A. during the day or night and in any weather conditions. B. during the day or night and in clear weather only. C. during the night only and in any weather conditions. D.

If two materials are made from different kinds of atoms, what else should you expect to be different? a. the kinds of neutrons they have b. the properties they have c. the mass of their electrons d. the charge of their protons

A balloon is inflated from 0.0100 l to 0.400 l against an external pressure of 10.00 atm. how much work is done in joules? 101.3 j = 1 l x atm

How are the troposphere, stratosphere, and thermosphere important for supporting life on Earth? Which layer of the atmosphere is likely the most important for life on Earth?

What is the thermometer

In which natural cycle must an important gas in Earth's atmosphere be fixed before plants can use it? a. sulfur cycle b. carbon cycle c. nitrogen cycle d. oxygen cycle

Convection only occurs in what? a. gases b. fluids c. liquids d. solids

Which philosopher called all people the "sovering" meaning all power should rest with them?

M = 10 Kg r = 0,5 m v=2m/s