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3 years ago

HELP!! WILL MARK BRAINLIEST!!!!!

Physics

1 answer:

krek1111 [17]3 years ago

5 0

Answer:

Create

Broken

Explanation:

Bond formation or creation requires the use of energy. Energy is used during bond formation between chemical species. The energy is required for the reaction to occur.

When bonds are broken, energy is released
Bond breaking process is a procedure that releases energy.
This energy makes them able to react.

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Three identical stars of mass M form an equilateral triangle that rotates around the triangle’s center as the stars move in a co

zheka24 [161]

Answer:

$v=\sqrt{\dfrac{2GM}{L}}$

Explanation:

M = Mass of planets

R = Radius of circle

v = Velocity

$\theta$ = Angle

The circle is inside the triangle

$cos\theta=\dfrac{\dfrac{L}{2}}{R}\\\Rightarrow R=\dfrac{L}{2cos\theta}$

The centripetal acceleration

$\dfrac{Mv^2}{R}=2\dfrac{GM^2}{L^2}cos\theta\\\Rightarrow \dfrac{Mv^2}{\dfrac{L}{2cos\theta}}=2\dfrac{GM^2}{L^2}cos\theta\\\Rightarrow \dfrac{Mv^22cos\theta}{L}=2\dfrac{GM^2}{L^2}cos\theta\\\Rightarrow v^2=\dfrac{2GM}{L}\\\Rightarrow v=\sqrt{\dfrac{2GM}{L}}$

The speed of the stars is $v=\sqrt{\dfrac{2GM}{L}}$

5 0

3 years ago

Grizzly bears are known to run really fast. What is the momentum of a grizzly bear (about 420 pounds) running at 17 m/s ?

labwork [276]

Answer:

A. Momentum of the grizzly bear is 3241.56 Kgm/s

B. The human will run at 28.56 m/s

Explanation:

A. Determination of the momentum of the grizzly bear.

Mass of grizzly bear = 420 lb

Velocity of grizzly bear = 17 m/s

momentum of the grizzly bear =?

Next, we shall convert 420 lb to Kg. This can be obtained as follow:

1 lb = 0.454 kg

Therefore,

420 lb = 420 lb × 0.454 Kg / 1 lb

420 lb = 190.68 Kg

Thus, 420 lb is equivalent to 190.68 Kg

Finally, we shall determine the momentum of the grizzly bear as follow:

Mass of grizzly bear = 190.68 Kg

Velocity of grizzly bear = 17 m/s

momentum of the grizzly bear =?

Momentum = mass × velocity

Momentum = 190.68 × 17

Momentum = 3241.56 Kgm/s

Thus, the momentum of the grizzly bear is 3241.56 Kgm/s

B. Determination of how fast the human will run.

Mass of human = 250 lb

Momentum of human = momentum of the grizzly bear

Momentum of the grizzly bear is 3241.56 Kgm/s

Momentum of human = 3241.56 Kgm/s

Velocity of human =?

Next, we shall convert 250 lb to Kg. This can be obtained as follow:

1 lb = 0.454 kg

Therefore,

250 lb = 250 lb × 0.454 Kg / 1 lb

250 lb = 113.5 Kg

Thus, 250 lb is equivalent to 113.5 Kg

Finally, we shall determine how fast the human will run as follow:

Mass of human = 113.5 Kg

Momentum of human = 3241.56 Kgm/s

Velocity of human =?

Momentum = mass × velocity

3241.56 = 113.5 × velocity

Divide both side by 113.5

Velocity = 3241.56 / 113.5

Velocity = 28.56 m/s

Therefore, the human will run at 28.56 m/s to match the momentum of the grizzly bear

3 0

3 years ago

You stand 17.5 m from a wall holding a softball. You throw the softball at the wall at an angle of 38.5∘ from the ground with an

zheka24 [161]

The ball's horizontal position in the air is

$x=\left(27.5\dfrac{\rm m}{\rm s}\right)\cos38.5^\circ t$

It hits the wall when $x=17.5\,\mathrm m$ , which happens at

$17.5\,\mathrm m=\left(27.5\dfrac{\rm m}{\rm s}\right)\cos38.5^\circ t\implies t\approx0.813\,\mathrm s$

Meanwhile, the ball's vertical position is

$y=\left(27.5\dfrac{\rm m}{\rm s}\right)\sin38.5^\circ t-\dfrac g2t^2$

where $g$ is the acceleration due to gravity, 9.80 m/s^2.

At the time the ball hits the wall, its vertical position (relative to its initial position) is

$y=\left(27.5\dfrac{\rm m}{\rm s}\right)\sin38.5^\circ(0.813\,\mathrm s)-\dfrac g2(0.813\,\mathrm s)^2\approx\boxed{10.7\,\mathrm m}$

5 0

3 years ago

OMG BRAINLIEST ANSWER AND 13POINTS OMG!!!!!!!!! THIS IS A ONE TIME OFFER FOLKS SO COME IN NOW!!FOLKS!!

Pavel [41]

Wild Life species
terrain
location along the equator
hope this helps

3 0

3 years ago

2) A tomato is launched upwards with a velocity of 27 m/s. What is its height after 2.1 seconds in the air?

olga_2 [115]

The height of the tomato in air after 2.1 seconds is 78.31 m.

<h3 /><h3>What is height?</h3>

Height can be defined as vertical distance either between the top and bottom of something or between a base and something above it.

To calculate the height of the tomato after 2.1 seconds, we use the formula below.

Formula:

H = ut+gt²/2............. Equation 1

Where:

H = Height of the tomato
u = Initial velocity = 27 m/s
g = Acceleration due to gravity = Constant = 9.8 m/s²
t = 2.1 seconds

Substitute these values into equation 1

H = (27×2.1)+(9.8×2.1²)/2
H = 56.7+21.609
H = 78.31 m

Hence, the height of the tomato after 2.1 seconds is 78.31 m.

Learn more about height here: brainly.com/question/28122539

#SPJ1

8 0

1 year ago