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Mashutka [201]
3 years ago
13

PLEASE HELP NO LINKS NEED HELP FAST

Physics
1 answer:
MrRa [10]3 years ago
7 0

Answer:

The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. This means that no matter what galaxy you happen to be in, all the other galaxies are moving away from you

Explanation:

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Calculate the calories lost when 95 g of water cools from 45 ∘C to 29 ∘C. Express your answer to two significant figures and inc
lubasha [3.4K]

Answer:

1,520.00 calories

Explanation:

Water molecules are linked by hydrogen bonds that require a lot of heat (energy) to break, which is released when the temperature drops. That energy is called specific heat or thermal capacity (ĉ) when it is enough to change the temperature of 1g of the substance (in this case water) by 1°C. Water ĉ equals 1 cal/(g.°C).

Given that ĉ = Q / (m.ΔT),

where Q= calories transferred between the system and its environment or another system (unity: calorie or cal) (what we are trying to find out),

m= mass of the substance (unity: grams or g), and

ΔT= difference of temperature (unity: Celsius degrees or °C); and

m= 95g and ΔT= 16°C:

Q= 1 cal/(g.°C).95g.16°C =<u> 1,520.00 cal </u>

8 0
4 years ago
If electrons are taken away from an atom, the atom develops a _________ charge.
VARVARA [1.3K]

Answer:

a positive charge

Explanation:

5 0
4 years ago
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According to the big bang theory, the universe was once a very and hostile place.
brilliants [131]
According to the big bang theory, the universe was once a very C. hot and hostile place, and it expanded rapidly. This rapid expansion was the very reason it eventually cooled down and eventually got to its present state where all the planets and galaxies and what not were created. 
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3 years ago
A stone has a mass of 100 grams and a volume of 10ml water has a density of 1 g/ml will the stone sink or float?
JulsSmile [24]
Density = Mass / Volume 

Density of stone = 100 / 10 = 10 g/mL

If the density is higher than water, then the object will sink. If the density of the object is lower than water, then the object will float. 

Since the density of the rock is 10g/mL and the density of the water is 1g/mL, the stone will sink.
3 0
3 years ago
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A 2 C charge and a 4 C charge attract each other with 10 N of force How much will a 2C charge and a 8 C charge attract each othe
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Answer: 20N

Explanation:

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