All categories

3 years ago

What are the very cold (about 20 K), dense clouds of gas thought to be the most massive objects in the Galaxy called?

1 answer:

8 0

The very cold (about 20 K), dense clouds of gas thought to be the most massive objects in the Galaxy are called molecular clouds.

Answer: Option B

Explanation:

Molecular clouds are basically the interstellar clouds made of dust and gaseous clumps. The clouds have an average density of 100 to 300 mcc with a temperature range of 10 to 20 K. The formation of stars takes place in the inner region of clouds. The size of molecular clouds may range from a few Light years to 600 Light years. A dar Nebula is the densest version of the molecular clouds.

You might be interested in

Three identical very dense masses of 7500 kg each are placed on the x axis. One mass is at x1 = -100 cm , one is at the origin,

sukhopar [10]

Answer:

0.00354 (N)

Explanation:

Convert to metric system:

$x_1 = -100 cm = 1 m$

$x_2 = 420 cm = 4.2 m$

Formula for gravitational force:

$F_g = G\frac{mM}{s^2}$

where s is the distance between 2 bodies masses m and M

Substitute the number to the formula above and since the 2 forces are acting in opposite direction, the total net gravitational force on the mass of origin be:

$F_g = F_{g1} - F_{g2}$

$F_g = G\frac{m_1M}{x_1^2} - G\frac{m_2M}{x_2^2}$

$F_g = GM(\frac{m_1}{x_1^2} - \frac{m_2}{x_2^2})$

$F_g = 6.67*10^{-11} * 7500 (\frac{7500}{1^2} - \frac{7500}{4.2^2})$

$F_g = 5*10^{-7}(7500 - 425.17)$

$F_g = 5*10^{-7} * 7074.83$

$F_g = 0.00354 (N)$

5 0

3 years ago

Which pattern do you find easy to conduct?

Brut [27]

The numbers represent the beats in each measure
The arrows represent the direction of movement between beats
The word out represents a movement away from your body.
The word in represents a movement towards the center of your body.

4 0

3 years ago

Climate and weather are related but different. Which of the following describes the climate of a place?

iren2701 [21]

Climate. What does it mean?

Climate is a long-term weather, or recurring every time. Examples of climate? Every day, the desert is hot the day and cold in the night. This won't change, at least for hundreds, thousands, millions of years. This is climate.

Weather. What does it mean?

Weather is short-term, usually not recurring every time. Examples of weather? Today is very sunny. This will change-for all we know, tomorrow will be cloudy and rainy!

This is why your answer will NOT be a meteorologist predicts that tomorrow will be sunny and warm. This is weather, because it is only tomorrow.

This is why your answer will NOT be fertile soil makes farms in the region very productive. This does not relate to weather, or climate.

This is why your answer will NOT be the temperature dropped below freezing every night last week. This will only be "last week", not the week right now or the week after this week.

Therefore, your answer is "Thunderstorms frequently occur in the summer. This is because that's the climate in that part- thunderstorms always happen.

Brainliest?

4 0

3 years ago

If you weigh 150 lbs. on the surface of Earth, how much would you weigh on Venus? On Mars?

Ghella [55]

Answer:

weight on Venus = 604.15 N

weight on Venus = 252.01 N

Explanation:

Given:

Weight on the earth , W = 150 lbs

now,

1 lbs = 4.45 N

thus,

W = 150 × 4.45 = 667.5 N

now, mass on the earth, m = 667.5/9.8 = 68.11 kg

now,

⇒ weight on Venus,

the acceleration due to gravity on venus = 8.87 m/s²

thus,

weight on Venus = mass × acceleration due to gravity on venus

weight on Venus = 68.11 × 8.87 = 604.15 N

⇒ weight on mars,

the acceleration due to gravity on mars = 3.70 m/s²

thus,

weight on Venus = mass × acceleration due to gravity on venus

weight on Venus = 68.11 × 3.70 = 252.01 N

7 0

4 years ago

A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of 0.500 M HCl at 25.0°C is added to 50.

GalinKa [24]

Answer:

Explanation:

In this calorimetry problem, the heat released by the reaction is equal to the heat absorbed by the solution (assumed to have the same specific heat capacity as water, 4.19 Jg⁻¹°C⁻¹).

The formula Q = mcΔt will be used to calculate the heat energy, where m is the mass, c is the specific heat capacity, and Δt is the change in temperature from final to initial.

The volume of solution is (50.0 + 50.0)mL = 100.0mL = 100.0g, since water has a density of 1.00g/mL.

The heat absorbed by the solution is then calculated.

Q = mcΔt = (100.0 g)(4.19 Jg⁻¹°C⁻¹)(28.2°C - 25.0°C) = 1340 J

The closest answer is B) 1300 J. This answer is obtained by including only two significant figures in the answer.

7 0

3 years ago