If the mass of a car is 1200 kg, and the mass of the driver is 65 kg, the total combined mass of the car and driver expressed with the correct number of significant figures is 1265 kg.
Ultraviolet light. It can cause skin cancer and that is why we wear sunscreen. We also wear sunglasses because some research has shown that it can damage eyes. Although it can be dangerous, it can also kill certain bacterias.
