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Oliga [24]
3 years ago
13

I will Mark Brainliest 1. ) Allena and Charissa were discussing whether Cl2 is an element or a compound. Allena said that it is

an element because it has only one type of atom. Charissa said that it is a compound because it has more than one atom. Who is correct?
Allena is correct. It is an element because it is only one atom.


Charissa is correct. It is a compound because it has a two.


Charissa is correct. It is a compound because it is made of more than one atom.


Allena is correct. It is an element because it is only made of chlorine atoms.


2.) When a block of steel at 90 degrees Celsius is placed in a bucket of water at 30 degrees Celsius, what happens?


The temperature of the steel decreases and the temperature of the water increases.


The temperature of the steel increases and the temperature of the water increases.


The temperature of the steel decreases and the temperature of the water decreases.


The temperature of the steel increases and the temperature of the water decreases.


3. ) What law states that energy can neither be created nor destroyed, but it is transformed?



Law of Thermal Energy


Law of Thermonuclear Energy


Law of Conservation of Energy


Law of Kinetic Energy
Physics
1 answer:
WITCHER [35]3 years ago
7 0
The answer to question one is A.
The answer to question two is A.
The answer to question three is D.

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Un vas plin cu lichid cântăreşte 175kg. Ceea ce reprezintă de 5 ori masa vasului gol. Ştiind că volumul interior al vasului este
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a) Density of the liquid: 823.5kg/m^3

b) Weight of the liquid: 1372 N

Explanation:

Translation of the text:

<em>"A full tank with liquid weighs 175kg. Which is 5 times the mass of the empty vessel. Knowing that the inside volume of the vessel is 0.17kl, calculate: </em>

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a)

We know that the full tank with liquid has a total mass of M = 175 kg. We can write the total mass as

M=m_L + m_V (1)

where

m_L is the mass of the liquid

m_V is the mass of the vessel

We also know that the total mass M is 5 times the mass of the empty vessel, so we have:

M=5m_V\\m_V=\frac{M}{5}=\frac{175}{5}=35 kg

which is the mass of the empty vessel.

Therefore, we can find the mass of the liquid only using (1):

m_L=M-m_V=175-35=140 kg

The density of the liquid is given by

d=\frac{m}{V}

where

m = 140 kg (mass of the liquid)

V = 0.170 kL = 170 L = 0.170 m^3 (volume of the liquid, which is equal to the volume of the vessel)

So we get

d=\frac{140}{0.170}=823.5kg/m^3

b)

The weight of a body is given by

F=mg

where

m is its mass

g is the acceleration due to gravity

For the liquid in this problem, we have

m = 140 kg (mass)

g=9.8 m/s^2 (acceleration due to gravity)

Therefore, its weight is

F=(140)(9.8)=1372 N

Learn more about density:

brainly.com/question/5055270

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