List two examples of ways to increase efficiency in a machine.

Given two objects that weigh the same on earth but with different densities, how is their weight ratio in a vacuum?

Is it possible, negative temperature in Kelvin scale?

A weather balloon is filled to a volume of 6000 L while it is on the ground, at a pressure of 1 atm and a temperature of 273 K. The balloon is then released into the atmosphere. As the balloon rises, the pressure decreases to 0.

For thermometers to read temperatures correctly they must be

What is 9/15 as a percentage

You are skateboarding and push back with one leg, and, as a result, the skateboard moves forward. Which law of motion is being described in this scenario?

How do you relate and explain a planet's distance from the Sun to things like the time of their year & their average tempareature

Describe the steps used by conventional sewage treatment plants to break down our sewage into a relatively safe effluent that gets dumped into a river, lake, or ocean.

During melting, the forces of attraction between the molecules A) become weaker. B) remain the same. C) become stronger. D) become stronger and then weaker.

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?