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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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true or false when taking a handoff you need to make sure you you reach out with your hands and grab the ball ​
astra-53 [7]

Answer:

i think False

Explanation:

8 0
3 years ago
Infrared telescopes are usually placed on high-flying airplanes or on satellites in space __________
Yuliya22 [10]

Answer:

In order to improve visibility

Explanation:

Infrared telescopes are made using infrared cameras that contain infrared detectors which are solid-state and are maintained at very cold (cryogenic) temperatures

Infrared radiation is absorbed by water vapor which is present in the Earth's atmosphere, leading to the limitation of the use of infra red telescopes at high altitudes such as mountains, high flying planes or satellites

3 0
3 years ago
A 5.0 kg wooden block Is 100 meters from the ground. What is the gravitational potential energy for the block?
iren [92.7K]

Answer:

<h2>4900 J</h2>

Explanation:

The gravitational potential energy of a body can be found by using the formula

GPE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

GPE = 5 × 9.8 × 100

We have the final answer as

<h3>4900 J</h3>

Hope this helps you

7 0
3 years ago
Once your rocket reaches space, the captain adjusts the speed. your captain goes from 24,000 km/hr to 17,000 km/hr over 90 secon
Semmy [17]

Answer:

-21.6 m/s^2

Explanation:

First of all, we need to convert the initial and final velocities into m/s:

u = 24,000 km/h = 6666.7 m/s is the initial velocity

v=17,000 km/h =4722.2 m/s is the final velocity

The acceleration is given by

a=\frac{v-u}{t}

where

t = 90 s is the time elapsed

Substituting the numbers, we find

a=\frac{4722.2 m/s-6666.7 m/s}{90 s}=-21.6 m/s^2

and the negative sign means the rocket is decelerating.

5 0
4 years ago
What is the velocity of the object moving from 3 - 7 seconds?<br> O m/s<br> -6 m/s<br> 6 m/s
11111nata11111 [884]

That's the flat-top marked ' B '.

It's 6 m/s.

7 0
3 years ago
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