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3 years ago

What does Einstein's famous equation for nuclear energy, E = mc^2, mean?

Physics

1 answer:

Nezavi [6.7K]3 years ago

8 0

Yup the correct answer is A jus finished the quiz :)

hope i helped^_^

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Current is produced when charges are accelerated by an electric field to move to a position of lower

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Current is created when charges are quickened by an electric field to move where the position of lower temperature. An electric current is a stream of electric charge. In electric circuits, this charge is regularly conveyed by moving electrons in a wire.

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3 years ago

The skillful and effective interaction of movements; completing more than one movement at a time

horrorfan [7]

It is called balance

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3 years ago

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In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so

Pepsi [2]

Answer:

(a) 181.05 m/s²

(b) 13.2°

Explanation:

Given:

Radius of the circle (R) = 0.610 m

Angular acceleration (α) = 67.6 rad/s²

Angular speed (ω) = 17.0 rad/s

(a)

Radial acceleration of the ball is given as:

$a_r=\omega^2R$

Plug in the given values and solve for $a_r$ . This gives,

$a_r=(17.0\ rad/s)^2\times (0.610\ m)\\\\a_r=289\times 0.610\ m/s^2\\\\a_r=176.29\ m/s^2$

Now, tangential acceleration is given by the formula:

$a_t=R\alpha$

Plug in the given values and solve for $a_t$ . This gives,

$a_t=(0.610\ m)(67.6\ rad/s^2)\\\\a_t=41.236\ m/s^2$

Now, the magnitude of total acceleration is given as the square root of the sum of the squares of tangential and centripetal accelerations. Therefore,

$a_{Total}=\sqrt{(a_r)^2+(a_t)^2}$

Plug in the given values and solve for total acceleration, $a_{Total}$ . This gives,

$a_{Total}=\sqrt{(176.29)^2+(41.236)^2}\\\\a_{Total}=181.05\ m/s^2$

Therefore, the magnitude of total acceleration is 181.05 m/s².

(b)

Angle of total acceleration relative to radial direction is given by the formula:

$\theta=\tan^{-1}(\frac{a_t}{a_r})\\\\\theta=\tan^{-1}(\frac{41.236}{176.29})\\\\\theta=13.2\°$

Therefore, the total acceleration makes an angle of 13.2° relative to radial direction.

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3 years ago

Which of the following is not accurate when describing solids? A. Solids are better conductors of heat than liquids B. The amoun

Elza [17]

B. The amount of pressure exerted by a solid is solely dependent on its mass
i just took the test

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3 years ago

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Hold your hand out with your elbow at your side and your forearm parallel to the ground. You should notice your bicep muscle fle

Advocard [28]

Answer:

Explanation:

We shall consider the balance of forearm . The weight is balanced by tension created in the bicep of forearm.

The weight of forearm will act downward . Let it be W. Tension T of bicep will pull the forearm upwards . Bicep muscle is attached at a point between palm and elbow. Its other end is attached with hind arm . If we hold the forearm parallel to ground , weight acts vertically downwards and tension in bicep makes some angle with the vertical . Let it be θ.

Vertical component of tension T

= T cos θ . It will balance W .

T cos θ = W

T = W / cos θ

the value of cos θ will always be less than 1.

so T > W . or

tension in bicep is more than weight of forearm.

7 0

3 years ago