18. What is the difference between nearsightedness and farsightedness?

Question

((Is that just for regular sight, or is there another term I'm not recognizing?))


((LINKS FOR ALL THE QUESTIONS BELOW, PLEASE!))

19. Describe how an electromagnet works and give an example.

20. In the figure shown above, how could you determine the wavelength?

21. If the current in a wire is at 0.5 A and the voltage is measured at 100 volts, what is the resistance in the wire? Show all work and include the proper units?

22. What is the electric power used by an appliance if the current is 2 A and the voltage is 50 volts? Show work and include all units.

23. What is the electromagnetic spectrum? Explain and give an example?

24. How are sound waves produced, and what impacts do different types of matter have on the speed of the wave?

Answer 1

M&M's clearly didn't read or understand this part of the instructions on the Post a New Question webpage:

Homework Posting Tips

Please show your work. Tutors will not do your homework for you. Please show your work for any question that you are posting.

Answer 2

M&M's we don't volunteer to do homework for students who aren't willing to put in the required effort. The tutors here are meant to guide students, not to provide answers so students can slack off.

Answer 3

You clearly didn't read what I said. It says I want links. Not just your answers.

Answer 4

Google each subject.

difference between nearsightedness and farsightedness

electromagnet

etc.

Answer 5

Hmmmm!

Where does it say, "I want links." ???

Answer 6

I like turtles.

Answer 7

Note: Neither Writeacher nor I posted those last two messages. Imposters are at it again!