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Ludmilka [50]
3 years ago
7

Which of the following are examples of etiquette? Check all of the boxes that apply.

Physics
1 answer:
Irina18 [472]3 years ago
6 0

Answer:

C& D

Explanation:

ON EDG2020

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kotegsom [21]

Answer:

The take-off speed is 41.48 \frac{m}{s}

Explanation:

Given :

Range R = 77 m

Projectile angle \alpha  = 13°

From the formula of range,

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Find the velocity from above equation,

  v_{o} = \sqrt{\frac{gR}{\sin 2 \alpha } }

  v_{o} = \sqrt{\frac{9.8 \times 77}{\sin 26} }                              ( ∵ g = 9.8 \frac{m}{s^{2} } )

  v_{o} = 41.48 \frac{m}{s}

Therefore, the take-off speed is 41.48 \frac{m}{s}

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Two point charges, initially 3 cm apart, are moved to a distance of 1 cm apart. By what factor does the resulting electric force
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The answer is B (1/9).
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Explanation's of E=MC²
natita [175]

Answer:

E means energy

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Class II levers like ankles and wheelbarrows are useful because they provide mechanical advantage, by amplifying the input force
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Answer:

The solution and the explanation are in the Explanation section.

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According to the diagram that is in the attached image, the EFFORT force at point A and the load is at O point. The torque due to weight is:

TA = W * (a * cosθ)

The torque due to effort at C point is:

TC = E * (b * cosθ)

The net torque is equal to 0, we have:

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W * (a * cosθ) - E * (b * cosθ) = 0

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power

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