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Lina20 [59]
3 years ago
13

True or false elliptical galaxies are made up of old stars containing small amount of gas

Physics
1 answer:
ch4aika [34]3 years ago
6 0
True, They contain old stars and posses little gas or dust
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A robin in flight has 20.8 J of PE when it is 27.6 m high. What is the mass of the robin? (Unit = kg)
schepotkina [342]

Answer:

<h2>\boxed{  \bold{ \purple{0.0769 \: kg \: }}}</h2>

Explanation:

\sf{Potential   Energy ( P.E ) \:  =  \: 20.8 \: joule}

\sf{distance \:  = 27.6 \: metre}

\sf{mass = } ?

\sf{acceleration \: due \: to \: gravity = 9.68 \:  {metre \: per \: second}^{2} }

Now, let's find the mass:

\sf{PE  \:  =  mass \times gravity \:  \times  \: distance}

plug the values

⇒\sf{20.8 = m \times 9.8 \times 27.6}

Multiply the numbers

⇒\sf{20.8 = 270.48 \: m}

Swap the sides of the equation

⇒\sf{270.48m = 20.8}

Divide both sides of the equation by 270.48

⇒\sf{ \frac{270.48m}{270.48}  =  \frac{20.8}{270.48} }

Calculate

⇒\sf{0.0769} kg

Hope I helped!

Best regards!!

7 0
3 years ago
Read 2 more answers
The picture below shows four objects a paper clip, a pair of scissors, a needle and a horseshoe. assume that each object is made
Nataly_w [17]

Mass

Explanation:

They physical property that is not the same among the four objects is their masses.

Mass is the amount of matter contained in a substance.

  • Specific heat is the amount of energy needed to raise the temperature of 1g of a substance by 1k.
  • Since the materials are made of the same metal, they have the same specific heat.
  • They will also have the same magnetism and electrical conductivity.
  • These properties are intensive property and do not depend on the amount of matter present.
  • Mass is an extensive property that depends on the amount of matter present.

learn more:

Physical property brainly.com/question/5881840

#learnwithBrainly

6 0
3 years ago
Science is made up of two things, what is it
rodikova [14]

Answer:

Natural science is concerned with the description, prediction, and understanding of natural phenomena based on empirical evidence from observation and experimentation. It can be divided into two main branches: life science (or biological science) and physical science.

Explanation:

4 0
3 years ago
An electromagnetic wave has a frequency of 5.0 x 1014 Hz. What is the
andrezito [222]

Answer:

c

Explanation:

wavelength = speed of light/ frequency

= (3x 10^8 m/s)/(5.0 x 10^14 Hz)

= 6.0 x 10^-7 m

5 0
3 years ago
If an object has a positive charge, are the electrons from another object more likely to be attracted to it or to repel it?
Vlad1618 [11]

Answer:

attracted

Explanation:

Electrons are negative.

A positively charged object will attract a negatively charged object

3 0
2 years ago
Read 2 more answers
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