2. a biologist measures the speed of a swimming amoeba. the amoeba covers a distance of 17.36 microns in 30 seconds. the biologist wished to compare the speed of the amoeba with the speeds of other animals, but the speeds of other animals are listed in kilometers per hour. what is the speed of the amoeba in kilometers per hour? (1 micron = 1 × 10–6 m) use scientific notation, and express your answer to the correct number of significant figures. you
must show your work for full credit.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.