1. When a star collapses to form a black hole, its mass

a. decreases

b. remains the same

An atom containing an equal number of protons and electrons is called a what atom

Calculate the orbital period of a spacecraft in an orbit 300 kilometers above earth's surface

Herman is a slim man who is 5 feet 10 inches tall and weighs 140 pounds. However, he has diabetes, a disease that usually occurs in obese individuals. Which most likely explains Herman's condition? Obesity can correlate to diabetes.

When a rocket is in space and needs to return to Earth, it has to push off something. But there is no air in space for the rocket to push off of. How will it return?

Riley is cleaning his room (a once a year activity) and pulls the Hoover with a force of 8 N a total distance of 20 metres. How much work does he do? Where does this energy end up

An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep crouch, pushed straight up for 0.21 s, and reached a height of 2.5 m above the ground.

The metric unit of force is the Newton (N), which is kg∙m/s^2. Convert 10 mg∙cm/s^2 to Newtons. Be careful when working with units. A. 1 x 10^-2 N B. 1 x 10^-5 N C. 1 x 10^-6 N D. 1 x 10^-7 N

Which of the following aspects of the environmental movement addresses the public's right to intervene in environmentally damaging activities on private land?

A mine elevator is supported by a single steel cable 0.0125 m in diameter. The total mass of the elevator cage and occupants is 6450 kg. By how much does the cable stretch when the elevator hangs by 362 m of cable? (Neglect the mass of the cable.

What scientific practice is this? 1) collecting data 2) asking a question 3) providing explanations 4) communicating results