An electromagnet is made from a coil of wire which acts as amagnet when an electric current passes through it. Often anelectromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
Answer: The question is incomplete because the options are not given here are the options gotten from Another website.
A. Ultraviolet light detects the presence of radioactive substances.
B.Ultraviolet light shows cold areas as blue and warm areas as red.
C.Ultraviolet light causes substances to fluoresce and give off visible light.
D. Ultraviolet light transmits information to AM and FM radio receivers.
The correct option is C.
Ultraviolet light causes substances to fluoresce and give off visible light
Explanation:
This is because UV light radiates at a very short wavelengths compared to visible light which is impossible for humans to see it. Therefore , when UV light is absorbed by some particular materials, it reflect back towards the eye as visible radiation with a longer wavelength .This process is called UV-induced visible fluorescence.
Answer:20,000 m/s
Explanation: the formula is f=v/lambda so you would do 10,000=v/2 and you multiple the 2 to 10,000 since you were originally dividing and you get 20,000 and your unit is m/s
<span>In assumption that there were two scientists who used
different measurement systems in their research. The problems that might arise
if they shared their data is obviously and primarily error. Errors are
recognized and one element in every measure, system and quantity. Error was
already even present in the measurement system alone a scientist used and it
will furthermore aggregate, when these two different scales are combined the
more error escalates in the process. There are two types: random and systematic
error. </span>
Answer:
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