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belka [17]
3 years ago
12

What do you spiral and elliptical galaxies have in common

Physics
1 answer:
malfutka [58]3 years ago
3 0
They have a uniform luminosity and are similar to the bulge in a spiral galaxy, but with no disk. The stars are old and there is no gas present. Ellipticals are usually found in the high density field, at the centre of clusters.
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Amy gets up from her seat on the train to move closer to the front of the train. Just as she begins to walk toward the front, th
Misha Larkins [42]
The answer is B this can be easily shown if you have ever gotten up on a bus its the same effect but if you have trouble  just elimination works A and D are outrageous and wrong C i can see the confusion but a train or a bus making you go in motion but your body wants to keep moving so it keeps in motion 
5 0
3 years ago
8 N to the Lefr and 4 N to the right find the net force is this balanced
olga_2 [115]

Answer:

4N to the left. No it is not balanced.

Explanation:

8 -4 = 4 N of force

Balanced would be if they equaled zero, so 8 to the left and 8 to the right

8 0
4 years ago
An engine extracts 441.3kJ of heat from the burning of fuel each cycle, but rejects 259.8 kJ of heat (exhaust, friction,etc) dur
Lilit [14]

Answer:

  • The thermal efficiency is 0.4113.

Explanation:

We know that the thermal efficiency is the ratio of work done by the engine over the heat taken

\eta = \frac{W_{made}}{Q_{in}}

Now, how much work the engine do in a cycle?

We know that the work done in a cycle must be equal to the heat taken minus the heat rejected

W{made} = Q_{in} - Q_{rejected}

So, the thermal efficiency will be:

\eta = \frac{Q_{in} - Q_{rejected}}{Q_{in}}

\eta = \frac{Q_{in}}{Q_{in}} - \frac{Q_{rejected}}{Q_{in}}

\eta = 1 - \frac{Q_{rejected}}{Q_{in}}

Putting the values of the problem

\eta = 1 - \frac{259.8 kJ }{441.3kJ}

\eta = 0.4113

7 0
4 years ago
The energy of a given wave in the electromagnetic spectrum is 2.64 × 10-21 joules, and the value of Planck’s constant is 6.6 × 1
olga_2 [115]
20x=10 - ion kno i think
4 0
4 years ago
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Westkost [7]

Answer:

block 2 or 4

because of the distribution of weight and force being applied to the object

3 0
3 years ago
Read 2 more answers
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