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Evgen [1.6K]
3 years ago
14

10 Select the correct answer. What property of a wave remains unchanged when a wave enters a different medium? O A amplitude OB.

frequency OC. wavelength OD. velocity O E. density Reset​
Physics
2 answers:
Mama L [17]3 years ago
8 0

a and b ik thats the awser becuse imjust did it

inna [77]3 years ago
3 0

Answer:

<h2>B frequency </h2>

Explanation:

if the frequency changes so does the energy and that doesn't happen to EM waves entering a medium by the conservation of energy

Correct me if im wrong but im 100% its B

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According to the Law of Reflection, the angle of incidence the angle of reflection. O A. is greater than B. is less than C. equa
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C. Equals

Explanation:

Law of reflection Equals the angle of incidence

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Brainliest and 100 POINTS
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Reflection- serious thought or consideration

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4 years ago
Read 2 more answers
What is the source of energy in the food chain​
Aleksandr [31]

Answer:

The first source of energy in a food chain is producer.

Explanation: In the food chain, the producer will be a plant that a primary consumer, a herbivore eats. The herbivore gets eaten by a secondary consumer, carnivorous. When the carnivore dies, it becomes energy for a decomposer.

5 0
3 years ago
A body of mass 250g is release from the top of a building. if the body hits the ground with a velocity of 4m/s, calculate th hei
Nutka1998 [239]

\purple{\maltese}\large\underline{\underline{\sf\:\: Given :}} \\

» Mass ( m ) of the body = 250 g

» final velocity of the body = 4 m/s

\\\purple{\maltese}\large\underline{\underline{\sf\:\: To \: \: Find :}}  \\

» The height of the Building= ??

\\\purple{\maltese}\large\underline{\underline{\sf\:\: Solution :}} \\ \\

★ <u>Height of the </u><u>building </u><u>by the principal of conservatio</u>n;

\\\\\begin{gathered}\purple{\maltese}\large\underline{\underline{\sf\:\: using \: formula :}} \\ \\\end{gathered}

\bigstar \: \underline{ \boxed{\sf { \pink{ \:  \frac{1}{2}  \: \: mv { }^{2} =  \: mgh \:    }}}}

\\  \: \: \underline{\textsf {Putting values \: in \: the \: \: given \: formula :}} \\

\\  \sf \implies \:  \frac{1}{2}  \: \: mv { }^{2} =  \: mgh \:     \\

\\  \sf \implies \:  \frac{v {}^{2} }{2}  \: \: =  \: gh \:     \\

\\  \sf \implies \:   h \: = \frac{v {}^{2} }{2g}  \: \: \:     \\

\\  \sf \implies \:   h \: = \frac{16 }{20}  \: \: \:     \\

\\  \sf \implies \:   h \: = 0.8  \: \: \:   m  \\

\\  \sf \implies \:   h \: = 80  \: \: \:   cm  \\

henceforth , The height of the Building is <u>0.8 m or 80 cm</u> ..!!!

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2 years ago
Question 1.)
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1.) - D.) Electromagnet

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