Why are satellites placed into orbit at least 150 km above Earth's surface?

to avoid air resistance

to match Earth's curvature

to create inertia

to increase friction

What are some physical properties of a star

A typical nuclear power plant converts 0.01% of the mass of its fuel into energy through nuclear reactions. how much fuel would be needed to power an average city for one day?

Steven has always been impatient, competitive, and driven to win. This behavior pattern puts Steven at a greater risk for a heart attack.

What causes a solar eclipse? Choose two answers

A star that is several thousand times brighter than the sun with a temperature lower than 4,000 k would be classified as what kind of star?

A scientific hypothesis can be disproved with

The life cycle of stars may be boiled down into a tug of war, lasting billions of years, between two basic forces. In your own words, describe these forces, and identify which of the two eventually "wins" the battle.

One of the goals of psychology is to predict future behavior or mental processes. Which of the following scenarios best illustrates this goal?

When a chemical reaction occurs, A.) reactants interact to form products with different chemical and physical properties B.) reactants interact to form products with different numbers of atoms C.

7. A type of non-renewable energy would be: O wind O petroleum O water solar