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3 years ago

7

Many scientists agree that the universe is about _____ years old.

2 answers:

Zielflug [23.3K]3 years ago

4 0

Answer:

The correct answer is option C, 13 billion

Explanation:

Most of the scientists believe that the age of universe is approximately 13.77 billion years. The estimates age is based on the distances and radial velocities of other galaxies which are moving away from each other at a speed directly proportional to their distance. Basically the logic is to measure the time must that has elapsed between the Big Bang incidence and the present.

Rashid [163]3 years ago

3 0

Many scientists agree that the universe is about 13 billion years old.

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Bill has a perfect cube of an unknown substance. The density of the substance is 3.0 g/cm. He

Gwar [14]

The volume of the cube of unknown substance is $27\ cm^3$ . The length of one side of the cube is 9 cm

<u>Explanation:</u>

As per the formula of mass and density, Mass / Density equals to volume. Therefore as the mass of the cube was given to be 81 g and the density of the cube is known to be 3.0 g/ $\mathrm{cm}^{3}$ ,, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as

$\text {volume}=\frac{\text {mass}}{\text {density}}=\frac{81 g}{3 g / \mathrm{cm}^{3}}=27 \mathrm{cm}^{3}$

As it is a cube, the volume is product of length, breadth, and height. Here, all sides are same as it is the cube.

$volume= length \times breadth \times height$

$27=3 l$

$length of cube's one side, l=\frac{27}{3}=9 \mathrm{cm}$

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Murljashka [212]

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Hoochie [10]

Answer:

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