Answer:
Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.
Explanation:
Science
Enhancers are eukaryotic DNA sequences that can be used to elevate transcription and have variable positions and orientations.
Object permanence is the developmental milestone that must be reached before an infant experiences separation anxiety. It is used to describe the ability of a child to know that objects continue to exist despite the fact that they can no longer be perceived that is , seen or heard, touched, smelled, or sensed in any way. This milestone is developed through touching and handling objects by the infants.
B. Group number
For example, Sodium(Na) is in Group 1 and Na^+ has a charge of +1.