Which element has a - 2 charge?

Magnesium

Sulfur

Sodium

Hydrogen

Cells are known as the foundation of all life. How have these small structures changed our planet?

Three sound waves from the same source travel toward you across an open field. The three waves have high, medium, and low amplitudes. Which sound reaches you first? A. The high-amplitude wave B. The medium-amplitude wave C. The low-amplitude wave D.

Kelly sits on a rock. Her weight is an action force. Describe the reaction force.

A hungry 12.5 kg predator fish is coasting from west to east at 70.0 cm/s when it suddenly swallows a 1.30 kg fish swimming from north to south at 3.40 m/s.

Imagine that you're standing in a large room when a loud noise is made. You begin hearing a series of echoes. Which charactestics of sound best explains what just happened

How long does it take a car to travel 450 km at 75 km/hr

A free-falling golf ball strikes the ground and exerts a force on it

What are the main activities involved in studying physics?

What is the energy that moves your arms and legs

A moving object can be in equilibrium. Explain.