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erastovalidia [21]

3 years ago

15

Scientists can organize their obervations using

1 answer:

Nadya [2.5K]3 years ago

6 0

Answer:

Basically, scientists use hypothesis as a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Explanation:

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mihalych1998 [28]

A metallic bond would be formed

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At what point is the northern hemisphere pointed farthest away from the sun?

inna [77]

<span>Well, It is the aphelion point, When the Earth is farthest away from the Sun, when the Northern Hemisphere is warm. the Earth is closest to the Sun, or at the perihelion, 2 weeks after the June Solstice, when the Northern Hemisphere is enjoying warm summer months. Well this kind of weather is very nice.</span>

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3 years ago

A small branch is wedged under a 200 kg rock and rests on a smaller object. The smaller object is 2.0 m from the large rock and

Alexxandr [17]

Answer:

a

$F =326.7 \ N$

b

$M = 6$

Explanation:

From the question we are told that

The mass of the rock is $m_r = 200 \ kg$

The length of the small object from the rock is $d = 2 \ m$

The length of the small object from the branch $l = 12 \ m$

An image representing this lever set-up is shown on the first uploaded image

Here the small object acts as a fulcrum

The force exerted by the weight of the rock is mathematically evaluated as

$W = m_r * g$

substituting values

$W = 200 * 9.8$

$W = 1960 \ N$

So at equilibrium the sum of the moment about the fulcrum is mathematically represented as

$\sum M_f = F * cos \theta * l - W cos\theta * d = 0$

Here $\theta$ is very small so $cos\theta * l = l$

and $cos\theta * d = d$

Hence

$F * l - W * d = 0$

=> $F = \frac{W * d}{l}$

substituting values

$F = \frac{1960 * 2}{12}$

$F =326.7 \ N$

The mechanical advantage is mathematically evaluated as

$M = \frac{W}{F}$

substituting values

$M = \frac{1960}{326.7}$

$M = 6$

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3 years ago

Write down applications of mechanics

harkovskaia [24]

Answer:

Explanation:

applied Mechanics and its Growing Utilisation of Theoretical Mechanics.\

Structural Engineering.

Hydraulics.

Mechanical Engineering.

External Fluid Dynamics.

Planetary Sciences.

Life Sciences.

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What does the word “adverse” mean in the following sentence? Adverse reactions, such as fever and headache, can occur if the med

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I think it's D. unfavorable hope it helps

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