Which of the following statements about protostars is true?

A) Protostars do not always become stars.

B) Protostars never become stars.

C) Scientists do not yet know if protostars ever become stars.

D) Protostars always become stars.

Suppose the null hypothesis, H0, is: a weightlifting bar can withstand weights of 800 pounds and less. What is the Type I error in this scenario?

A generator converts

How many miles does the earth go around the sun?

Which chemical reaction releases the most energy? a. nuclear chain reaction b. fission reaction c. fusion reaction d. chemical reaction

Four large grocery food chains sell approximately how much of the nation's food? one-fourth one-half three-fourths 100 percent

Why is specific heat different for different materials

What must happen for an ion To form

What type of material is inside the holes in an electrical outlet?

A fisherman noticed that a float makes 30 oscillations in 15 seconds. The distance between two consecutive crests is 2 m. What is the period and frequency of the wave? What is the wave speed?

A small spaceship with a mass of only 2.6 ✕ 103 kg (including an astronaut) is drifting in outer space with negligible gravitational forces acting on it. If the astronaut turns on a 12 kW laser beam, what speed will the ship attain in 1.