1.)which of the following is an example of a producer? a.)ant b.)fern c.)sun d.)chestnut

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?