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Ghella [55]
3 years ago
6

How much heat is released to freeze 47.30 grams of copper at its freezing point of 1,085°C? The latent heat of fusion of copper

is 205.0 J/g.
Physics
2 answers:
katovenus [111]3 years ago
3 0

Answer:

=9696.5J

Explanation:

The latent heat of fusion of a unit mass of copper is the heat released when it changes from its molten state to solid state of the heat absorbed to melt it.

The total energy released is calculated using MLf where M is the mass of the copper and Lf is the latent heat of fusion.

=mLf

=47.30 grams×205.0J/g

=9696.5J

Rudik [331]3 years ago
3 0

Answer:

-9697

Explanation:

thats the answer

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Create a following distance greater than 3 seconds ahead when_______. a driver behind you is trying to pass you are not in a hur
Shtirlitz [24]

Answer:

option (a)

Explanation:

Maintaining distance while driving in traffic can avoid the chances of an accident.                        

When the driver is behind you is trying to pass you to avoid the collision you should maintain a distance greater than 3 sec.

Hence, option (a) is correct.

 

6 0
2 years ago
A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it
anyanavicka [17]

Answer:

density d = 1.59 g/cm^3

The density of the rock is 1.59 g/cm^3

Explanation:

The density of an object can be derived by measuring its mass and then measuring its volume by submerging it in a graduated cylinder.

Density = mass/volume of water displaced

d = m/v ........1

Given;

mass m = 344 g

Volume of water displaced v = 216 cm^3

from equation 1, we can calculate the value of the density;

Substituting the given values;

d = 344/216 g/cm^3

d = 1.592592592592 g/cm^3

d = 1.59 g/cm^3

The density of the rock is 1.59 g/cm^3

5 0
3 years ago
Determine whether each of the following is exothermic or endothermic and indicate the sign of δh. A. Natural gas burning on a st
Oxana [17]

Answer:

A) exothermic, δh is negative

B) endothermic, δh is positive

C) endothermic, δh is positive

Explanation:

And endothermic process absorbs heat from its sorrounding, cooling the sorrounding down. Whereas an exothermic process releases heat to its sorrounding raising the temperature of the sorrounding system.

5 0
3 years ago
A transformer consists of a 500 turn primary coil and a 2000-turnsecondary coil. If the current in the secondary is 3.0A, what i
Neporo4naja [7]

Answer:

The correct solution will be "12.0 A".

Explanation:

The given values are:

N_p= 500 \ turn

N_s= 200 \ turn

I_s= 3.0 \ A

By using the transformer formula, we get

⇒ \frac{N_p}{N_s}  =\frac{I_s}{I_p}

⇒ I_p = I_s\times \frac{N_s}{N_p}

On substituting the given values, we get

⇒      =3.0 \ A\times \frac{2000}{500}

⇒      =12.0 \ A

8 0
3 years ago
I NEED THIS ANSWER TODAY PLEASE HELP ME
Anastaziya [24]

The answer is "B" - If there are no windows then there will be no light coming in, and therefore you don't have to worry about what time of day you do the experiment at.

7 0
3 years ago
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