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kvv77 [185]
3 years ago
14

Can you think of some places where we use electric buzzers

Physics
1 answer:
hjlf3 years ago
3 0

Answer:

To unlock a door and indicate to the person that the door is now unlocked

Explanation:

Schools all have doors locked. Visitors/parents need to press a button. That creates a buzz sound in the office, secretary presses a button to unlock the door. The person trying to enter the school hears a buzz and the secretary telling them to enter the building.

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D is the correct answer
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When t= 1 a stone B is thrown vertically upwards from ground level with speed 5ms (ii) find t when a and b collide
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Answer:

i don't know if this is good for you but

Explanation:

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5 0
2 years ago
Consider a steel cable with a diameter of 8.0 mm. Calculatethe stress in the cable when it holds a person weighing 850 N.Report
pishuonlain [190]

Answer:

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Explanation:

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\text{Stress = }\frac{F}{A}

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Where r is the radius. Since the radius is half the diameter, the radius is 4.0 mm and the area will be equal to:

\begin{gathered} A=3.14(4\operatorname{mm})^2 \\ A=50.24\operatorname{mm}^2 \end{gathered}

Then, replacing the force F by 850 N, and A by 50.24 mm², we get that the stress is equal to:

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