Light is either potential energy or kinetic.
Answer: No , a chemical change has not occured as it was easily reversed.
Explanation:
Chemical change is defined as a change in which rearrangement of atoms take place and leads to formation of new substances. It can only be reversed with the help of a chemical reaction.
Physical change is defined as a change which leads to change in shape, size or state of the substance changes. No new substance is formed.It can be easily reversed.
As the hair colour was washed out and returned to its original brown colour, it was a physical change.
Until the stack begins to move, the static frictional force is
exactly equal to the your pulling force.
We know that because the books are not accelerating, so
the horizontal forces on the stack must be balanced.
Answer:
(a) You can tell that have the same strength because they have attracted the same amount of paper clips.
(b) Iron is used in electromagnets because steel retained magnetic properties after the power was turned off, but in the iron, the paper clips dropped off right away.
1.Vitamin C (ascorbic acid)
Chemical formula of vitamin C is C6H8O6
Two elements found in vitamin C are Carbon and Hydrogen
2. Vitamin B12 (Cyanocobalamin)
Chemical formula of vitamin B12 is C63H88CoN14O14P
Two elements found in vitamin B12 are Phosphorous and Cobalt. Of these two elements, Cobalt is a trace element and is found right at the center of this vitamin.
3. Vitamin E (alpha-Tocopherol)
Chemical formula of vitamin E is C29H50O2
Two elements found in vitamin E are Hydrogen and Oxygen.