What causes interstellar dust and gas to start to contract and form a protostar?

1) the shockwave from a supernova

2) nearby black hole

3) an increase in the solar wind

4) nuclear fusion

Which force in nature is believed to have formed second?

What describes the inportance of investigations of science

Tera performed multiple experiments to determine the best growing conditions for Azaleas. In one experiment, she tested the effect of using different types of soil.

Two piston hydraulic problems a. A = 1 sq. in. b. B = 10 sq. in. If a force is applied to piston A and it moves 6 in down, the weight of piston B will move how many inches up?

A person walks along a road 2 miles and rests. Then taking another road, he travels 3 miles; and switching to a dirt path, he walks 2 miles before arriving at his destination. The distance the person has traveled is 7 miles. True False

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?