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3 years ago

Create a multimedia presentation about your favorite element.

Physics

2 answers:

Volgvan3 years ago

7 0

Answer:

Do the element oxygen

Explanation:

...

Nostrana [21]3 years ago

6 0

Answer:

,,,

Explanation:

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Suppose you exert a force of 180 N tangential to a 0.280-m-radius 75.0-kg grindstone (a solid disk). What is the angular acceler

Lina20 [59]

Explanation:

It is given that,

Force on grindstone, F = 180 N

Radius of grindstone, r = 0.28 m

Mass of grindstone, m = 75 kg

We need to find the angular acceleration of the grindstone. In rotational motion, the relation between the torque and angular acceleration is given by :

$\tau=I\times \alpha$

$\alpha=\dfrac{\tau}{I}$

I is the moment of inertia of solid disk, $I=\dfrac{1}{2}mr^2$

$\tau$ is the torque exerted, $\tau=F\times r$

$\alpha=\dfrac{F\times r}{\dfrac{1}{2}mr^2}$

$\alpha=\dfrac{2F}{mr}$

$\alpha=\dfrac{2\times 180\ N}{75\ kg\times 0.28\ m}$

$\alpha =17.14\ rad/s^2$

So, the angular acceleration of the disk is $17.14\ rad/s^2$ . Hence, this is the required solution.

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3 years ago

a. Of the three experiments that are used to confirm the Big Bang theory, which is the most interesting to you and why?

HACTEHA [7]

Answer:

Explained

Explanation:

Big Bang happened about 13.7 billion years ago. It is most accepted theory of universe creation. Several experiments have confirmed the happening of big bang back then, in promising way. One of this experiment is the red shift experiment. A scientist named Edwin Hubble tried to study the spectrum of stars. He made a shocking revelation that universe is rushing outwards in all directions. Light travelling away registers on the red side. He observed that the distance stars showed red shift in accelerated manner. If the universe is accelerating that means, at one point it would have been smaller, in fact it was as small as an atom, some how it exploded and lead to formation of the expanding universe.

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3 years ago

____________________ (is/are) one type of tectonic event captured in geologic maps.

dangina [55]

Answer:

Seismic activityis/are) one type of tectonic event captured in geologic maps.

3 0

2 years ago

My school doesn’t really teach help

Olegator [25]

C
Unbalanced causes something to move because the net force is greater than zero

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3 years ago

Would a bottleneck event of the plants in an area from the video at the top of this page result in the need for primary or secon

andriy [413]

The bottleneck event of the plants in an area results in secondary succession.

<h2>What is bottleneck event?</h2>

A bottleneck is an event that drastically reduces the population size of an organism. The bottleneck may be caused by various events, such as an environmental disaster, the hunting or habitat destruction that results in the deaths of organisms.

<h3>Secondary succession</h3>

Secondary succession is a type of ecological succession in which plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity e.g., farming or road or building construction.

Learn more about succession here: brainly.com/question/1212975

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2 years ago