How do you figure out how many neutrons and protons are in each ιѕoтope.

A force that needs to touch something to affect it

An airplane flies at 100km/h in still air. If it flies into a 10 km/h headwind, its groundspeed is A) 100 km/h B) 110 km/h C) 120 km/h D) 90 KM/h

A scientist mixes an unknown powder into a beaker of water. He then uses an indicator and finds that the pH of the resulting solution is 8.5. What can he infer from this observation? The unknown powder was acidic.

Which is an example of a transverse wave? A. sound B. electromagnetic C. water D. seismic waves

Why is it important to understand the concept of density?

How did people years ago find out which side of a magnet was north and which was south?

Which change occurs when an atom undergoes decay?

A wave is moving toward shore with a velocity of 18.0 m/s. If its period is 4 s, what is its wavelength? Explain your answer.

Describe how the Catapult works?

Anything dissolved in water