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VARVARA [1.3K]
3 years ago
13

Which statements describe the principles of the big bang theory? Select two options. The universe is continuing to expand. The u

niverse stretched from a single point. The universe resulted from the collision of light and dark energy. The universe expanded, but its size is now remaining constant. The universe is slowly collapsing and getting smaller.
Physics
2 answers:
Hitman42 [59]3 years ago
6 0

Answer A and b

Explanation:

irina1246 [14]3 years ago
3 0

Answer:

a. The universe is continuing to expand.

b. The universe stretched from a single point.

Explanation:

An explanation by the astronomers of how the universe was formed or began is referred to as the big bang theory. They posited that the universe stretched from a single point and then expanded to how it is right now.

Basically, it was stated by the astronomer known as Georges Lemaître.

The statements which best describe the principles of the big bang theory are;

I. The universe is continuing to expand.

II. The universe stretched from a single point.

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1) A car is traveling down the interstate at 37.1 m/s. The driver sees a cop and quickly slows down. If the driver slows to 29.8
dlinn [17]

Explanation:

1. Acceleration is the change in velocity over time.

a = Δv / Δt

a = (29.8 m/s − 37.1 m/s) / 3 s

a = -2.43 m/s²

2. Work equals force times distance.

W = Fd

W = (87.3 N) (2.04 m)

W = 178 J

3. Power is work per time.

P = W / t

267 W = 1250 J / t

t = 4.68 s

3 0
3 years ago
A shopper pushes a 5.32 kg grocery cart
Juli2301 [7.4K]

Answer:

\text { acceleration of the cart is } 10.94 \mathrm{m} / \mathrm{s}^{2}

Explanation:

According to “Newton's second law”

“Force” is “mass” times “acceleration”, or F = m× a. This means an object with a larger mass needs a stronger force to be moved along at the same acceleration as an object with a small mass

Force = mass × acceleration

\text { Acceleration }=\frac{\text { force }}{\text { mass }}

Given that,

Mass = 5.32 kg

\text { Force }=12.7 \mathrm{N} \text { forces at }-28.7^{\circ}

x=-28.7^{\circ}

F = 12.7N

Normal force = mg + F sinx,  

“m” being the object's "mass",  

“g” being the "acceleration of gravity",

“x” being the "angle of the cart"

\mathrm{g}=9.8 \mathrm{m} / \mathrm{s}^{2}\text { (g is referred to as the acceleration of gravity. Its value is } 9.8 \mathrm{m} / \mathrm{s}^ 2 \text { on Earth })

To find normal force substitute the values in the formula,

Normal force = 5.32 × 9.8 + 12.7 × sin(-28.7)

Normal force = 52.136 + 12.7 × 0.480

Normal force = 52.136 + 6.096

Normal force = 58.232 N

<u>Acceleration of the cart</u>:

\text { Acceleration }=\frac{\text {Normal force}}{\text { mass }}

\text { Acceleration }=\frac{58.232}{5.32}

\text { Acceleration }=10.94 \mathrm{m} / \mathrm{s}^{2}

\text { Therefore, "acceleration of the cart" is } 10.94 \mathrm{m} / \mathrm{s}^{2}

7 0
2 years ago
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If we assume that, in the African savanna, rainfall and the amount of grass is plentiful, what other factor would BEST explain a
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Diseases, Hunting (sport for humans),  predators
8 0
3 years ago
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When an electron is added to a neutral atom of an element to form a negative ion, the resulting change in energy is referred to
IgorLugansk [536]
The statement "<span>When an electron is added to a neutral atom of an element to form a negative ion, the resulting change in energy is referred to as the electron potential of that element." is false. 


Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
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4 0
3 years ago
What is the value of x in the equation Ix - 3y = 30, when y = 15?
ankoles [38]

Answer: x= 75

Explanation:1x -3y = 30

And y = 15

Substitute y accordingly into the equation, so that

x - 3(15) = 30

x-45=30

Add 45 to both sides if the equation

x-45+45=30+45

x=75

8 0
3 years ago
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