The mass of a black hole with the same radius as the sun is 4.7x10^35kg. how many times more massive is this black hole than the mass of the sun (2x10^30kg)

a.5

b.160

c.10500

d. 235000

The correct option is: d. 235000

Explanation:

Given: The radius of the black hole and the sun is equal

The mass of the black hole = 4.7 × 10³⁵ kg

And the mass of the Sun = 2 × 10³⁰ kg

Therefore, in order to find out how much massive is the black hole than the Sun, ratio of the mass of the black hole and the Sun is taken

⇒4.7 × 10³⁵ kg ÷ 2 × 10³⁰ kg = 2.35 × 10⁵ = 235000

Therefore, the black hole is 235000 times massive than the Sun.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.