3 years ago

Which best describes the relationship between the terms “frequency,” “wavelength,” and “hertz”?

Physics

2 answers:

Natali5045456 [20]3 years ago

5 0

Answer:

Frequency is the number of wavelengths, which is measured in hertz.

Explanation:

I have my ways ;)

AleksAgata [21]3 years ago

3 0

Answer:

Explanation:

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Forces always act in pairs? True or false

nasty-shy [4]

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True

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Just as Isaac Newton says, "For every action, there is an equal and opposite reaction."

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How about 8 X 10 to the 100th power.

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True

A scientific law only states that an event occurs.

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3 years ago

As a 2.0-kg object moves from (4.4 i + 5j) m to ( 11.6 i - 2j) m, the constant resultant force

fgiga [73]

Answer: $107.8\ J$

Explanation:

Given

Initial position of object is (4.4 i+5 j)

Final position of object is (11.6 i -2 j)

Force acting (4i-9j)

Work done is given by

$\Rightarrow W=F\cdot dx\\\Rightarrow W=(4i-9j)\cdot (11.6i-4.4i-2j-5j)\\\Rightarrow W=(4i-9j)\cdot (7.2i-7j)\\\Rightarrow W=28.8+63\\\Rightarrow W=91.8\ J$

Initial kinetic energy

$K_i=\dfrac{1}{2}\times 2\times 4^2\\\\K_i=16\ J$

Change in kinetic energy is equal to work done by object

$\Rightarrow K_f=K_i+W\\\Rightarrow K_f=16+91.8\\\Rightarrow K_f=107.8\ J$

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3 years ago