Because radio waves can travel in space but sound waves cannot.
Air caught in the ball of foil makes the ball less dense than water
Answer:
They are both correct.
Explanation:
The density of an object is defined as the ratio of its mass to its volume. This implies that the density of the object is both proportional to the mass and also to the volume of the object. John only mentioned mass which is correct. Linda mentioned the second variable on which density depends which is the volume of the object.
Hence considering the both statements objectively, one can say that they are both correct.
Answer:B When one bulb burns out, all the others lights stay lit.
Explanation: