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3 years ago

The universe is made up of ____

Chemistry

2 answers:

vladimir2022 [97]3 years ago

7 0

The correct should be A. thousands of galaxies

yKpoI14uk [10]3 years ago

5 0

A) thousands of Galaxies

Think, you have the Andromeda Galaxy, The Tobacco Galaxy, the Milky Way Galaxy and many many more

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In a recent Grand Prix, the winner completed the race with an average speed of 299.8 km/h. What was his speed in miles per hour,

scoundrel [369]

Answer :

(a) The speed is, 186.287 mi/hr

(b) The speed is, 83.277 m/s

(c) The speed is, 273.22 feet/s

Explanation :

(a) We are given the speed is, $299.8km/hr$

As we know that,

$1km=\frac{1}{1.60934}mi$

By using both the conversion, we get:

$299.8km/hr$

$\Rightarrow \frac{299.8km}{1hr}\times \frac{1mi}{1.60934km}$

$\Rightarrow 186.287mi/hr$

The speed is, 186.287 mi/hr

(b) We are given the speed is, $299.8km/hr$

As we know that,

$1km=1000m$

and,

$1hr=3600s$

By using both the conversion, we get:

$299.8km/hr$

$\Rightarrow \frac{299.8km}{1hr}\times \frac{1000m}{1km}\times \frac{1hr}{3600s}$

$\Rightarrow 83.277m/s$

The speed is, 83.277 m/s

(c) We are given the speed is, $299.8km/hr$

As we know that,

$1km=3280.84feet$

and,

$1hr=3600s$

By using both the conversion, we get:

$299.8km/hr$

$\Rightarrow \frac{299.8km}{1hr}\times \frac{3280.84feet}{1km}\times \frac{1hr}{3600s}$

$\Rightarrow 273.22feet/s$

The speed is, 273.22 feet/s

3 0

4 years ago

Atoms are so small that approximately _______ of them can fit at the end of a needle?

rewona [7]

Answer:

5 million million atoms can fit at the end of a needle

4 0

3 years ago

Read 2 more answers

I am confused on how to solve

Mumz [18]

What do you need help on

8 0

3 years ago

When the pressure that a gas exerts

Ronch [10]

Answer:

The pressure changes from 2.13 atm to 1.80 atm.

Explanation:

Given data:

Initial pressure = ?

Final pressure = 1.80 atm

Initial temperature = 86.0°C (86.0 + 273 = 359 K)

Final temperature = 30.0°C (30+273 =303 K)

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

P₁ = P₂T₁ /T₂

P₁ = 1.80 atm × 359 K / 303 K

P₁ = 646.2 atm. K /303 K

P₁ = 2.13 atm

The pressure changes from 2.13 atm to 1.80 atm.

5 0

3 years ago

Read 2 more answers

6. Much of the respiratory system is lined with

AlekseyPX

Answer:

the answer is Respiratory epithelium, or airway epithelium, is a type of ciliated columnar epithelium found lining most of the respiratory tract as respiratory mucosa, where it serves to moisten and protect the airways. But I don't see that option here.

7 0

2 years ago