What is the efficiency of a machine that miraculously converts all the input energy to useful output energy?

A radio transfers 270 J of energy electrically, 94.5 J is transferred by sound. Work out the efficiency of this radio. Give your answer as a decimal.

Oil is less dense than water, which is less dense than syrup. If you put these three liquids in a column, in what order would they layer from top to bottom?

How can hypotheses best be tested? by asking questions through experimentation by forming an opinion through technology

The process by which hot and cold air are transferred in the atmosphere is

What new characteristic did John Dalton add to the model of the atom? An atom is a round, solid mass. An atom has a massive, positive center. An atom is made up of smaller particles. An atom can join with other kinds of atoms.

Ways that charges can be transferred

A cricketer can throw a ball to a maximum horizontal distance of 100m. How much high above the ground can he throw same ball

What is the relationship between the slope of the position graph of an object and its velocity?

Differeniate between thermal energy and heat

The term that describes the time when the sun's are directly over the equator is: