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2 years ago

How was the evidence of the big bang called?

2 answers:

5 0

There are several main pieces of evidence that support the Big Bang theory. One is the fact that the universe is expanding, proven with something calledred shift. The second is something called cosmic microwave background radiation. The third is the abundance of different elements in the universe.

Wittaler [7]2 years ago

4 0

One of the fact that the universe is expanding proven with something called red shift . second fact is something called cosmic microwave background radiation .the third is the abundance of different elements in the universe

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4. There is a car with a large mass and a car with a small mass. If you push both cars with the

svlad2 [7]

I think the small mass Sorry if I’m incorrect

3 0

3 years ago

A 7.75-l flask contains 0.482 g of hydrogen gas and 4.98 g of oxygen gas at 65°c. What is the partial pressure of oxygen in the

dimulka [17.4K]

Answer:

0.558 atm

Explanation:

We must first consider that both gases behaves like ideal gases, so we can use the following formula: PV=nRT

Then, we should consider that, whithin a mixture of gases, the total pressure is the sum of the partial pressure of each gas:

P₀ = P₁ + P₂ + ....

P₀= total pressure

P₁=P₂= is the partial pressure of each gass

If we can consider that each gas is an ideal gas, then:

P₀= (nRT/V)₁ + (nRT/V)₂ +..

Considering the molecular mass of O₂:

M O₂= 32 g/mol

And also:

R= ideal gas constant= 0.082 Lt*atm/K*mol

T= 65°C=338 K

4.98 g O₂ = 0.156 moles O₂

V= 7.75 Lt

Then:

P°O₂=partial pressure of oxygen gas= (0.156x0.082x338)/7.75

P°O₂= 0.558 atm

3 0

3 years ago

A 5 kg object slows from +6 m/s to +2 m/s. What is the impulse?

Liula [17]

Impulse on the object: -20 kg m/s

Explanation:

The impulse exerted on an object is a vector quantity equal to the product between the force exerted on the object and the time interval during which the force is applied.

The impulse exerted on an object is also equal to its change in momentum. Mathematically,

$I=\Delta p = m(v-u)$

where:

m is the mass of the object

u is the initial velocity

v is the final velocity

For the object in this problem, we have

m = 5 kg

u = +6 m/s

v = +2 m/s

Therefore, its impulse is:

$I=(5)(+2-(+6))=-20 kg m/s$

The negative sign means the direction of the impulse is opposite to the direction of motion of the object.

Learn more about impulse:

brainly.com/question/9484203

#LearnwithBrainly

5 0

3 years ago

Please help me to solve the problem ?cm=1m

Oxana [17]

1m is equivalent to 100cm

1m = 100cm

4 0

3 years ago

In scientific terms, which situation does NOT represent work done on a rock?

Assoli18 [71]

ANSWER: D

EXPLAINATION:

All the other answers are alike so this is the only different one

MARK ME BRAINLIEST PLEASE

7 0

2 years ago