12. Curling is a sport in which players push large stones across smooth ice. Three curling stones that
have the same mass were sliding across the ice. They were each pushed by a player, but not all from
the same direction. Each curling stone changed speed as a result of being hit. Use the information in
the diagram to answer.
Which curling stone(s) experienced the strongest force when hit? How do you know?
The yellow and orange curling stones experienced the same strength force because they both gained force, but the blue curling stone lost force.
Explanation:
The yellow and orange curling stones experienced the same strength force because they both gained force, but the blue curling stone lost force.
air quality
poor drinking water
and heavy polution
can lead to poor health
answer: c. the experiment shows that the red substance experienced a chemical change.
explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.
chemical changes are accompanied by following changes:
a) precipitate formation
b) energy is released or absorbed
c) formation of bubbles
d) change in color
as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.
e