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AnnyKZ [126]
3 years ago
10

If 1.0kg of juice of a specific heat capacity 3.0kj/kg degrees c at a temperature of 10 degrees celsius is poured into a 1.0kg g

lass bowl that is 15 degrees celsius. determine the final temperature of the juice.
Physics
1 answer:
AlladinOne [14]3 years ago
3 0

We have heat lost by water is equal to heat gained by Juice.

Heat exchanged is calculated using the formula,

\Delta H=ms \Delta T

Let T_f be the final temperature then,

(1)(3)(T_f-10)=(1)(4.187)(15-T_f)\\  3T_f-30=62.805-4.187T_f\\  7.187T_f=92.805\\  T_f=12.913 K

The final temperature of the juice is 12.913 K.

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Vadim26 [7]

Answer:

C. Influenced by the Sun's electromagnetic field

Explanation:

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8 0
3 years ago
Two identical closely spaced circular disks form a parallel-plate capacitor. Transferring 2.1×109 electrons from one disk to the
Bad White [126]

Answer:

d = 0.018 m

Explanation:

Charge on the plates of the capacitor due to transfer of electrons is given as

Q = Ne

here we know that

N = 2.1 \times 10^9

so we have

Q = (2.1 \times 10^9)(1.6 \times 10^{-19})

Q = 3.36 \times 10^{-10} C

now we have electric field between the plates is given as

E = \frac{Q}{A\epsilon_0}

here we have

1.5 \times 10^5 = \frac{3.36 \times 10^{-10}}{A(8.85 \times 10^{-12})}

A = 2.53 \times 10^{-4} m^2

now we have

A = \frac{\pi d^2}{4}

2.53 \times 10^{-4} = \frac{\pi d^2}{4}

d = 0.018 m

3 0
3 years ago
Application - You have two objects that you want to push the same distance (5 meters) across the floor. The objects have differe
Mamont248 [21]

I see you're in Middle School, so I've got a hunch that they want you
to say "the dresser because it has more mass".  But that's a poor
answer, to a poor question.

The fact is that there's no way to tell.

The force it takes to move either object across the floor does NOT really
depend on just its mass.  It depends on both the object's mass AND the
friction between the object and the floor.  And THAT depends on the shape
of the feet where they touch the floor, and what kind of material the feet and
the floor are made of.

So it seems to me that we really don't have enough information to answer
the question with.

But again, I suspect that the answer they want is "the dresser because
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8 0
3 years ago
PLEASE HELP URGENT 1. You put 1 gram of salt into 1 liter of water and stir. The resulting liquid is an example of
daser333 [38]
C, is correct.

Have a nice day!
6 0
3 years ago
Which statement accurately describes what happens when water turns to ice in terms of energy
Deffense [45]

Answer:

The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.

Explanation:

Confirmed through test.

7 0
4 years ago
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