Which best describes the big bang theory? A. The universe is 4.6 billion years old. B. The universe is shrinking. C. Our universe is not the only universe. D. The universe is expanding.

Answers

Answer 1

Answer: The Big Bang Theory presents an explanation of the origin of the universe and is the most prevailing theory to date. According to the theory, the universe expanded from a state with a very high density which suddenly exploded and hurled matter to all directions. To this day, the expansion of the universe occurs and is supported by tons of evidences.

ANSWER: D. The universe is expanding.

Answer 2

Answer: The correct answer is letter D. The best statement that describes the big bang theory is that The Universe is Expanding. This is backed by the Doppler effect. Hope this answer helps! Good luck!

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The acceleration of a moving vehicles is 10 metre per second square what does it means

Answers

Answer:

Acceleration is the rate of change of velocity. What is commonly said as ‘ten meter per second squared’ can bee broken down into ‘ten meter per second per second.’ This gives us the true meaning of the term acceleration.

Just like ‘ten meter per second’ means increasing the displacement by ten meters every second, ‘ten meter per second per second’ means increasing the velocity by ten meters per second every second.

So, basically if you consider the case of a free fall motion, where ‘t’ stands for time and ‘v’ stand for velocity at that instant:

At,

t=0, v=0 m/s

t=1, v=0+10 m/s;

t=2, v=0+10+10 m/s;

t=3, v=0+10+10+10 m/s;

This can also be thought as a Arithmetic Progression where common difference ‘D’ is the acceleration(a), since it adds a 10 m/s to velocity every second and the first term ‘A’ stands for the initial velocity (u). Using this approach we can derive to the first equation of motion:

v = u + at

Hope this Answer Helps!!

Explanation:

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It means that the vehicle's speed increases at the rate of 10m/s every second.

At any time, it's speed is 10 m/s faster than it was 1 second earlier.

A gas occupies a volume of 20 cubic meters at 9,000 pascals. If the pressure is lowered to 5,000 pascals, what volume will the gas occupy?

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We need to consider no change in the temperature of gas (isothermal transformation)

Volume and pressure are inversely proportional magnitudes, so we can write:

$P_1.V_1=P_2.V_2\n \n 9.20=5.V_2\n \n V_2=(180)/(5)=36 \ m^3$

A sea breeze occurs because warm air rises on land and moves toward the ocean to cool. The cool air then moves from the ocean to be warmed by the land. a. True
b. False

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im going to go with a. True

The answer is A, true.

The energy that moving objects have is called ________ energy.a. heat
b. kinetic
c. potential
d. electromagnetic

Answers

kinetic I think.......

If all of the forces acting on an object balance so that the net force is zero, then(A) the object must be at rest
(B) the object’s speed will decrease
(C) the object will follow a parabolic trajectory
(D) the object’s direction of motion can change, but its speed cannot
(E) None of the above

Answers

True or false? Three common voltage sources are batteries, solar cells, and generators.

Answers

the answer to this question would be true

True .
Hope this helped!!

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