39. A. What makes mechanical waves different from electromagnetic waves? Mechanical waves consist of disturbances that can only travel through a medium, while electromagnetic waves can travel even without a medium. B. Electromagnetic waves need a medium to travel, while mechanical waves can travel without medium. C. Mechanical waves can be created by wiggling a rope up and down, while a sound wave can be created by wiggling a rope back and forth. The amplitude of electromagnetic waves tells about its energy, while in mechanical waves amplitude is its frequency, D w​

Select the correct answers. what does this passage reveal about eric and garrett? the biggest race on the warm-up field, eric went through his usual routine of stretching so he’d be fully prepared for the race. in what seemed like just a couple of minutes, he heard the announcer. “all 400-meter runners, make your way to your starting lanes.” as eric got into position, another runner named garrett taunted him. “you do know there’s no way you’re going to beat the speed of speed, don’t you? ” he said with a chuckle. eric pretended he didn’t hear garrett and cleared his mind of everything. the announcer yelled, “runners, take your mark, get set! ” as the starting gun sounded, eric took off with the rest of the runners. garrett immediately sprinted ahead of the pack, but eric hung back and kept a close eye on garrett. as they turned the last corner and headed down the straightaway, eric stayed focused and picked up his pace. soon he was running right beside garrett. just a few yards from the finish line, eric made a strong push. he crossed the finish line just a few feet ahead of garrett. a. garrett and eric are both overconfident about their speed. b. garrett likes to boast about himself, while eric is more modest. c. eric is focused, whereas garrett is distracted. d. eric believes in warming up, while garrett prefers to sprint.

Read the lines from "she walks in beauty." the smiles that win, the tints that glow, but tell of days in goodness spent, a mind at peace with all below, a heart whose love is innocent! which of wordsworth's beliefs about poetry is illustrated in these lines by byron? a. poetry should present the ordinary in unusual ways. b. poetry should include fantastical, dreamlike settings. c. poetry should revolve around feelings and emotions. d. poetry should focus heavily on everyday situations.

Which option is the most relevant piece of evidence for this claim