Một ly trà sữa chứa dựng năng lượng dinh dưỡng
khoảng 500 cal. Giá trị này tính ra đơn vị jun là

What happens to atoms and chemical bonds during a reaction?

The material that keeps its new shape after it is stretched is called?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?