A group of two or more stars is called a A. solar system B. neutron star C. protostar D. star system

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ∘ c. what would the pressure be if the container was heated to 85 ∘ c? express your answer with the appropriate units.

There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?

Calculate the rotational inertia of each of the following uniform objects about the axes indicated: a) A thin 2.5 kg rod of length 0.75 m, about an axis perpendicular to it and passing through its center. b) A 3 kg thin walled hollow sphere 0.

Select the sentence that best describes why plastics and rubbers are good insulators. a. In order for a material to be a good insulator, the electrons must be able to move freely into and out of the atom.

Hich of the following describes the sequence of events that most likely lead to the origin of life on Earth? Individual atoms combined to form simple molecules, which combined to make more complex molecules.

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?

What would a sound wave do if it traveled from a gas to a liquid? •stop •stay the same speed •slow down •speed up