Which statement about stars is correct?

F

Star formation begins in a nebula.

G White dwarfs become main-sequence stars when they gain mass.

H

Supergiants are stars that can absorb black holes.

J Main-sequence stars are formed by comets.

Who is credited with popularizing the geocentric model of the solar system? brahe copernicus newton ptolemy

True or false nonnative species can harm some populations in an ecosystem?

A single conservative force fx = (6.0x - 12) n (x is in m) acts on a particle moving along the x axis. the potential energy associated with this force is assigned a value of + 20 j at x = 0. what is the potential energy at x = 3.0 m?

When a single high-resistance (long) bulb is connected to a 1.5 volt battery, the current through the battery is about 80 milliampere.

How is energy conserved in driving a car

An automobile tire having a temperature of -2.6°C (a cold tire on a cold day) is filled to a gauge pressure of 24 lb/in^2 What would be the gauge pressure in the tire when its temperature rises to 43◦C?

Compared to that of a plane on the ground, Earth's gravitational pull on a plane 7 miles above Earth is approximately A) zero. B) the same. C) half as much. D) twice as much.

With what velocity does it hit the ground?

What chemical phenomenon accounts for the elasticity seen in solids? covalent bonds, hydrogen bonds, ionic bonds, all of the above

The particles in a surface water wave move back-and-forth only. Question 9 options: True False