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UkoKoshka [18]
3 years ago
6

Substances A and B, initially at different temperatures, come in contact with each other and reach thermal equilibrium. The mass

of substance A is twice the mass of substance B. The specific heat capacity of substance B is twice the specific heat capacity of substance A.
Which statement is true about the final temperature of the two substances once thermal equilibrium is reached?

Which statement is true about the final temperature of the two substances once thermal equilibrium is reached?

The final temperature will be closer to the initial temperature of substance B than substance A.
The final temperature will be exactly midway between the initial temperatures of substances A and B.
The final temperature will be closer to the initial temperature of substance A than substance B.
Chemistry
1 answer:
Katen [24]3 years ago
4 0
I think it's the final temperate will be exactly midway because although B is Hotter than A, A is twice as big as B which means it will have to heat twice as much as it's size I think this is the answer.
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1.Explain why the reactivity of group 7 decreases as you move down the group. Try to use the sentence starters here: When group
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Answer:

Explanation:

When group 7 elements react , their atoms  gains  one  electron into their highest occupied  energy level ( outer shell) to form single negative - charged ion .

As you move down the group , the outer shells get increased  i.e an additional electron shell is added  thereby increasing the atomic radius  of the atom.  The electrons in the outer shell move further away from the nucleus as we go down the group .

Therefore the force of  attraction  between the shells and nucleus is decreased .

This makes attracting an extra electron difficult  . And so ability of the atom to attract electron to fill the outermost shell reduces which means the   reactiveness of the atom reduces.

6 0
3 years ago
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Vsevolod [243]
After the first 2 min the 20 g  are only 10g,  (1 half-life)
after other 2 more min 5g (2 half-lives)
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7 0
3 years ago
A restaurant is trying to decide whether it should serve its customers coffee
san4es73 [151]

Coffee cools more quickly in a ceramic mug than in a Styrofoam

cup.

Explanation:

Styrofoam is a good insulator, thus for keeping the coffee warm for longer, it is a good choice than ceramic. The process involved in the control of heat dissipation employs the fact that the vapours in the form of gas are entrapped within, they lessen the conduction process between the molecules as a result molecules do not collide hence no energy releases or exchange takes place.

Styrofoam cups are made up of polystyrene foam. As a result of high insulation at styrofoam body conduction is not possible so coffee is warmer for longer.

6 0
3 years ago
Read 2 more answers
The bowl of fruit has a mass of 2.2 kg.
AURORKA [14]

Taking into account the Newton's second law, the correct answer is option A. F = 9.68 N right

In first place, acceleration in a body occurs when a force acts on a body.

Newton's second law states that a force will change the speed of an object because the speed and/or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object

Mathematically, Newton's second law is expressed as:

F= m×a

where:

  • F = Force [N]
  • m = Mass [kg]
  • a = Acceleration [m/s²]

In this case, you know:

  • F= ?
  • m= 2.2 kg
  • a= 4.4 m/s²

Replacing in Newton's second law:

F= 2.2 kg× 4.4 m/s²

Solving:

<u><em>F= 9.68 N</em></u>

Finally, As the bowl of fruit accelerates to the right, the correct answer is option A. F = 9.68 N right

Learn more about the Newton's second law:

brainly.com/question/23845187?referrer=searchResults

brainly.com/question/13959891?referrer=searchResults

6 0
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