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

A sphere is charged with electrons to -9 * 10-6 C. How many electrons make up this charge? The elemental charge is 1.6 * 10-19 C.

If you cannot get a chair to move across the floor, it is because ___ friction opposes your push. a. sliding b. static c. rolling d. fluid

If three of 3 ohms, 5 ohms, and 22 ohms are connected in series in a 28-volt circuit, how much current will flow through the 3-ohm resistor? A - 9.3 amperesB - 1.05 amperesC - 0.93 amperes

It takes 2.40s for a small ball with a mass of 0.08 kg released from rest from a tall building to reach the ground. calculate the height from which the ball is released.

Use omnipresent in a sentence

A comet is a A. meteoroid that travels through Earth's atmosphere and hits the surface. B. meteoroid that burns up in Earth's atmosphere, producing a streak of light. C.

Can Someone explain the steps for this? A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom above. Assuming it just reaches the window, he throws the love gifts at 16.

Which substance is a combination of different atoms?

If there are many forces acting on an object, how can the net force be 0:

What is a planetary nebula? a. leftover gas from a supernova explosion b. the ejected envelope of a giant star surrounding the remnant of a star c. a type of young, medium-mass star d. a planet surrounded by a glowing shell of gas e.