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melomori [17]
3 years ago
6

Calculate the kinetic energy of a 2.2kg brick when it has a speed of 4.9m/s

Physics
2 answers:
Sloan [31]3 years ago
5 0

Answer:

26.4 j

Explanation:

Alborosie3 years ago
3 0

Answer:

Kinetic energy of the brick is 26.4 Joule

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Explanation:

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What is Newtons third law
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A cyclist reaches the top of a hill with
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Answer:Based on the excerpt, which best describes Harburg’s view of the Great Depression?

He has no interest in financial success for himself.

He values artistic success over financial success for himself.

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2 years ago
Electronic flash unit cameras contain a capacitor for storing the energy used to produce the flash. In one such unit the flash l
Stolb23 [73]

Answer:

(A) 421 J energy stored in the capacitor for one flash.

(B) The value of capacitance is 0.0537 F

Explanation:

Given :

(A)

Time t = \frac{1}{675}

Average power P = 2.7 \times 10^{5} W

From power equation,

   P= \frac{E}{t}

So energy in one light is given by,

   E = Pt

  E = 2.7 \times 10^{5} \times \frac{1}{675}  = 400 J

Since efficiency is 95 % so we can write, energy stored in one flash,

E_{tot} = \frac{400}{0.95} = 421 J

(B)

From the formula of energy stored in capacitor,

 E = \frac{1}{2}C V^{2}

Where E = E_{tot} and V = 125 V

 C = \frac{2E}{V^{2} }

 C = \frac{2 \times 421}{15625}

 C = 0.0537 F

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3 years ago
Conveyor belts are often used to move packages around warehouses. The conveyor shown below moves packages at a steady 4.0 m/s. A
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Answer:

0 j

Explanation:

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3 years ago
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