Which is a characteritic of a physical change?

The external cover of aeroplane is made up of aluminium instead of iron. Why?

Which statement best describes thermal energy? The total amount of kinetic energy in the particles of an object. The total amount of potential energy in the particles of an object The increase of temperature of the particles of an object.

When a potential difference of 20 V is applied to a given wire, it conducts 0.25 A of current.?

What property of all ionic compounds make them electrolytes

How would the tides on earth be different if the moon revolved around earth in 15 days

A ball is dropped from the top of a building. TEL When does the ball have the least kinetic energy? RE O just before it hits the ground - O just after it is released O half way through the fall O after it has hit the ground

Which one of the following does not accurately describe the universal gravitational law? (a) gravitational forces is proportional to the product of the two masses.

Sound with frequency 1300 Hz leaves a room through a doorway with a width of 1.03 m. At what minimum angle relative to the centerline perpendicular to the doorway will someone outside the room hear no sound

If wavelength is kept constant, which increases as the speed of a wave increases? Question 13 options: period frequency amplitude phase

If the masses of an object increase and their distance from each other stays the same the force of gravity decreases increases stays the same increases then decreases