Phần lớn các chất đều nóng chảy và …… Ở một nhiệt độ …….. Nhiệt độ này gọi là ……… nhiệt độ……… của các chất khác nhau thì ……..

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell