Who created the light bulb?

Huan wants to enter the science fair at his school. He has a list of ideas for his project. Which questions could be answered through scientific investigation? Check all that apply.

A 129 v electric iron draws 3.47 a of current. how much heat is developed per hour? answer in units of j.

Suppose a car moving in a straight line steadily increases its speed, the first second from 35 to 40 km/hr, the second second from 40 to 45 km/hr, and the third second from 45 to 50 km/hour.

Which option was changed in the "Waves" lab to see how it would affect wave speed? a length of string b how hard the string was plucked c type of string d tension of string

A chinese book has the first written record of medical knowledge to solving crime in a description of how to distinguish between strangulation and drowning.

How long would it take the Earth to complete 4 orbits around the Sun?

Why is a control important in an experiment?

Explain the law of conservation of energy then give an example that shows the slot to be true in your example explain where there is potential energy and where there is kinetic energy also explain if any energy is lost to friction

Communicate is 25 a multiple of 2 or 5? how do you know?

When a ball is dropped it is easy to see that earth exerts a force on it. why cant you tell that the ball exerts a force on it. why can't you tell the ball exerts a force on Earth