Explain why wet clothes that are hung on a washing line dry best

Explain how a convection current is set up in water. The explanation has been started for you: When the heating element is switched on, the hot water nearest the element rises because ...

An observation of the red shift of galaxies suggests that the universe is a. expanding b. contracting c. reversing d. stagnant

As an astronaut travels towards Earth, her weight A. decreases because gravity decreases. B. decreases because her mass decreases. C. increases because gravity increases. D. remains the same because her mass remains the same.

Which of these statements is not true? A. Atoms of the same elements can have different masses. B. The nucleus of an atom has a positive charge. C. Atoms of isotopes of an element have different numbers of protons. D. Atoms are mostly empty space.

A balloon has a volume of 1.5-L at 25*C. What would be the volume of the balloon if it were placed in a container of hot water at 90*C?

Explain why Newton's first law of motion can be difficult to observe in moving objects?

No force is necessary to

A boat has a mass of 4040 kg. Its engines generate a drive force of 4660 N due west, while the wind exerts a force of 880 N due east and the water exerts a resistive force of 1400 N due east. Take west to be the positive direction.

Define the word projectile

Which is not a property of an electromagnetic wave? O It is made of magnetic fields It travels at the speed of light O It is made of electrical fields It carries energy only through matter