Electromagnetic radiation is more common than you think. Radio and TV stations emit radio waves when they broadcast their programs; microwaves cook your food in a microwave oven; dentists use X rays to check your teeth. Even though they have different names and different applications, these types of radiation are really all the same thing: electromagnetic (EM) waves, that is, energy that travels in the form of oscillating electric and magnetic fields.
Based on this information, which of the following statements is correct?
a) The earth absorbs visible light and emits radiation with a shorter wavelength.
b) The earth absorbs visible light and emits radiation with a longer wavelength.
c) The earth absorbs visible light and emits radiation with a lower frequency.
d) The earth absorbs visible light and emits radiation with a higher frequency.
Answers: 3
Physics, 22.06.2019 18:00
Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.
Answers: 1
Physics, 23.06.2019 03:30
First to answer will be the brainliest i need the answer asap
Answers: 1
Physics, 23.06.2019 11:00
Mr. polifka does a demonstration in science class. he holds an unlit match six inches above a candle flame. after a while, the match bursts into flame.
Answers: 1
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