Which of the following is a demonstration and not an experiment?

Question 2 options:

Microwaving seeds for 10, 20, and 60 second intervals and then measuring how much they grow over time

Using 6 potatoes to power a light bulb

Adding 5mL of vinegar to 10g of baking soda

Depends on the speed of the car.

Density= mass/volume so 5.1 divided by 4.7 is  5.1 / 4.7 =1.08510638298round to the correct number of sig figs

Answerstudying coal cumbustion as an energy source;

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.