Physics 10: Question/Observation 1



I know that our perception of color is due to the way lightwaves bounce off the surface of an object. My question is when I go shopping and choose what color shirt to buy, how are the shirts produced into different colors, if the materials are the same. They feel the same and the tags say they are made of the same materials, so how is the color altered ? Wouldn't all the shirts be the same color, if they are truly the same material and bounce off light in the same way?

--Anonymous


Following the law of Conservation of Angular Momentum, when someone spins they can increase their speed by extending their arms out and then moving them closer to their body. What would happen to the angular momentum of a person spinning if they were on the moon? Does gravitational force play into the law of Conservation of Angular Momentum?

--Anonymous


Why does cloth change color (get a deeper color) when it gets wet? Is there some type of chemical reaction that changes the color pigment?

--Lalida Sritanyaratana


If you were to drill a hole through the center of the earth, then drop a ball into that hole, would the ball go all the way through the other side? Or stop in the center? Or come back out the way it came? If it comes out either end, wouldn't the ball be basically rising out of the ground? What propels it, then?

--Anonymous


Why are water droplets attracted to each other when they are on a flat surface? When you pour droplets onto a table, why does the water clump up instead of separate?

--Sonia Mehta


Why will a kite stay up in the air when attached to a string, but fall to the ground when let loose—even on a gusty day?

--Anonymous


Why are all solar system bodies—like earth, sun, moon, etc., spherical in shape?

--Anonymous



Back to Physics 10 Main Page