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valkas [14]
3 years ago
8

Astronomers have proposed the existence of an unexplained force that is causing the expansion of the universe to accelerate. Wha

t do they call this force?
dark matter
dark space
dark stars
dark energy
dark holes
Physics
2 answers:
Hoochie [10]3 years ago
6 0
<h3><u>Answer;</u></h3>

Dark matter

<h3><u>Explanation;</u></h3>
  • <em><u>Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space.</u></em>
  • Space has amazing properties, many of which are just beginning to be understood.
  • Another explanation for dark energy is that it is a new kind of dynamical energy fluid or field. Dark matter makes up about 27%.
Alik [6]3 years ago
4 0
4. Dark Energy. This is the mysterious force causing the expansion of space. No one has ever seen this force.
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An example of a high specific heat is water’s specific heat, which requires 4.184 joules of heat to increase the temperature of 1 gram of water 1 degree Celsius. Scientifically, water’s specific heat is written as: 1 calorie/gm °C = 4.186 J/gm °C.

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3 years ago
an object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object
emmainna [20.7K]

Answer:

The acceleration of the object is -30\ m/s^2

Explanation:

Given:

Initial velocity of object v_i = 200 feet/second

Final velocity of object v_f = 50 feet/second

Time of travel = 5 seconds

To calculate acceleration of the object we will find the rate of change of velocity with respect to time.

So, acceleration a is given by:

a=\frac{v_f-v_i}{t}

where v_f represents final velocity, v_i represents initial velocity and t is time of travel.

Plugging in values to evaluate acceleration.

a=\frac{50-200}{5}

a=\frac{-150}{5}

a=-30\ m/s^2

The acceleration of the object is -30\ m/s^2 (Answer). The negative sign shows the object is slowing down.

4 0
3 years ago
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2 years ago
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Explanation:

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