Which of the following statements is true of a gas?

It has a fixed volume, but not a fixed shape

It has closely packed molecules

It can change into a liquid by adding heat

It takes the shape and size of a container

When electrons move down energy levels, are they gaining or losing energy?

What is the focus of community psychology

A manufacturer sells two goods, one at a price of $1000 a unit and the other at a price of $16,500 a unit. A quantity q1 of the first good and q2 of the second good are sold at a total cost of $5000 to the manufacturer.

What is characteristic of both sound waves and electromagnetic waves?

What instrument is used to measure air pressure?

How could you demonstrate that visible white light is composed of many different colours?

1500 Joules of work are done lifting a 500 N weight. How high was the weight raised as a result of this work?

A pelican flies at a speed of 52 km/h for 0.25 hours. how many miles does the pelican travel?

When must batteries in an emergency locator transmitter (ELT) be replaced or recharged, if re-chargeable?

Is it professional a cyber crime