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kobusy [5.1K]
3 years ago
10

How have astronomers interpreted the unexpectedly fast rotation of galaxies

Physics
1 answer:
melomori [17]3 years ago
8 0

Answer:

There must be a lot of dark matter that can be felt but not seen

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Identify the total number of protons and neutrons in the nucleus of the most common isotope of manganese
Usimov [2.4K]
Name: Manganese
Symbol: Mn
Atomic Number: 25
Atomic Mass: 54.93805 amu
Melting Point: 1245.0 °C (1518.15 K, 2273.0 °F)
Boiling Point: 1962.0 °C (2235.15 K, 3563.6 °F)
Number of Protons/Electrons: 25
Number of Neutrons: 30
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 7.43 g/cm3
Color: silverish/grayish
8 0
4 years ago
Read 2 more answers
What is the force on an object with a mass of 25 kg and an acceleration of 5 m/s/s? 1 point
Oduvanchick [21]

Answer:125N

Explanation:

Mass =25kg

Acceleration =5m/s/s

Force=mass x acceleration

Force=25 x 5

Force=125N

7 0
3 years ago
Ricardo is on vacation, doing some mountain climbing. He notices that the higher he goes up a mountain, the colder he feels. He
Irina-Kira [14]

Answer:

B. an inverse relationship

Explanation:

Here is the complete question

Ricardo is on vacation, doing some mountain climbing. He notices that the higher he goes up a mountain, the colder he feels. He remembers his physics teacher teaching about these types of relationships. What is the type of relationship between mountain elevation and temperature? A. a positive relationship B. an inverse relationship C. a neutral relationship D. a direct relationship

Solution

It is an inverse relationship because, as Ricardo's mountain elevation increases, he feels colder. So, as his mountain elevation increases, the temperature decreases.

Since one variable decreases while the other increases, it can only be an inverse relationship.

Let h be Ricardo's mountain elevation and T his temperature. So by inverse proportionality,

h ∝ 1/T

h = k/T

hT = k = constant

So, we have an inverse relationship and B is the answer.

8 0
3 years ago
Read 2 more answers
.
Montano1993 [528]

Commercial airliners encounter very little turbulence above 25,000 feet because the air is so thin at altitudes above 25,000 feet that turbulence has much less effect. That is option A.

<h3>What is turbulence?</h3>

A turbulence is a sudden disturbance that an airline encounters when it hits a strong wind current that can push or pull the plane.

The depth at which the airline flies determines whether the turbulence will have little or more effects on it.

At altitudes above 25,000 feet the air is so thin and light than below 25,000 feet therefore, the airline will encounter little turbulence effect.

Learn more about turbulence here:

brainly.com/question/20389242

#SPJ1

5 0
2 years ago
A mud blob, 0.350 kg, is thrown at a wall at 10 m/s. The blob sticks to the wall. What is the change in momentum of the blob?
Sati [7]
P=mv
(.350)(10)
=3.5kgms
3 0
4 years ago
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