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Klio2033 [76]
3 years ago
13

Jill activates a reusable hand warmer on a chilly day. As it warms her hands, the liquid inside the warmer crystallizes. Describ

e the process.
A) Chemical energy is modified to mechanical energy during the crystallization.
B) The energy in the liquid is reformed in an endothermic crystallization reaction.
C) The energy of the supersaturated liquid is converted to heat as the compound crystallizes.
D) The kinetic energy in the liquid is transferred to the crystals is an
Physics
2 answers:
inessss [21]3 years ago
6 0

Answer:

The correct answer is c

Explanation:

shtirl [24]3 years ago
3 0

Answer:

The answer is letter C, The energy of the supersaturated liquid is converted to heat as the compound crystallizes.

Explanation:

"Hand warmers" are very essential when the cold season comes. It provides warmth to the hands, especially when going outdoors. There are different kinds of hand warmers, such as the<em> "reusable hand warmer." </em>In contrast to air-activated hand warmers, the reusable hand warmers contain sodium acetate (not iron).

Sodium acetate is a "supersaturated liquid." This means that is has more substances dissolved in it. So, when this crystallizes, heat is released. Remember that crystallization is considered an "exothermic process." This means that the process releases energy (in this case, through "heat").

Thus, this explains the answer, letter C.

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Explain how competition between organisms affects the availability of resources in an area.
Fynjy0 [20]

Answer:

Completion between two organism is when they fight over resources inadvertently causing the use and destruction of recourses making it more scares. if they don't adapt they die out.

7 0
3 years ago
Find the currents flowing in the circuit in the figure below. (Assume the resistances are
Nitella [24]

By Kirchoff's law in left side loop

E_1 + E_2 = {r_1 + R_1 + R_4)I_1 + (R_2 + r_2) I_3

similarly kirchoff's law in right side loop

E_3 - E_4 - E_2 = (r_3 + r_4 + R_3)I_2 - (R_2 + r_2)I_3

also by junction law we know that

I_1 = I_2 + I_3

now by plug in all values we have

18 + 3 = (0.5 + 8 + 15)I_1 + (10 + 0.25)I_3

21 = 23.5I_1 + 10.25I_3

12 - 24 - 3 = (0.75 + 0.25 + 12)I_2 - (10+ 0.25)I_3

-15 = 13I_2 - 10.25I_3

So by solving above equations we have

I_1 = 0.492 A

I_2 = -0.428 A

I_3 = 0.920 A

6 0
4 years ago
The spaceship Lilac, based on the Purple Planet, is 759 m 759 m long, as measured at rest. When Lilac passes Earth, observers th
OleMash [197]

Answer:

The speed of Lilac is 0.422 times of the speed of light.

Explanation:

Given that,

Length of the spaceship Lilac at rest, L_o=759\ m

When Lilac passes Earth, observers there measure its length to be 688 m, L = 688 m

We need to find the speed of light is Lilac moving with respect to Earth. The formula of length contraction is given by :

L=L_o\sqrt{1-\dfrac{v^2}{c^2}} \\\\\dfrac{v}{c}=\sqrt{1-(\dfrac{L}{L_o})^2} \\\\\dfrac{v}{c}=\sqrt{1-(\dfrac{688}{759})^2} \\\\\dfrac{v}{c}=0.422\\\\v=0.422c

So, the speed of Lilac is 0.422 times of the speed of light.

4 0
4 years ago
The main technical challenge faced by skiers is _________.
lina2011 [118]

Answer:

vutcutzi5zktzktzj

Explanation:

ntzjtzitzti

3 0
3 years ago
Read 2 more answers
Item 19 A student with arms outstretched stands on a platform that is rotating with a constant angular speed. The student then p
nadezda [96]

Answer:

An increase in angular speed due to conservation of energy priciple.

Explanation:

This leads to a decrease in your moment of inertia. This means that your angular velocity must increase as a result of conservation of energy principle and therefore you will spin faster.

It's also the same way this conservation of energy principle applies to ice skaters that makes them spin faster when they suddenly draw their arms inwards.

4 0
3 years ago
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