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levacccp [35]
3 years ago
13

Water being turned into ice cubes in a freezer is an example of _____.

Physics
2 answers:
Vlad1618 [11]3 years ago
8 0

Answer:

an exothermic process and the change in enthalpy, ΔH, will be a negative number

Gekata [30.6K]3 years ago
7 0

Answer:

a physical change

Explanation:

after the water turns to ice, it will melt and became water again making which means it's reversible this being. a physical change

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If the treadmill’s initial speed is 1.7m/s, what will its final speed be?
GalinKa [24]
For how long? Or is it just speed ??
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Brainly i can you please help me
Art [367]

Answer:

bet

Explanation:

4 0
3 years ago
Two parallel wires carry a current in the same direction. there is ___________ between the wires.
Arte-miy333 [17]
The correct answer is "an attractive force" between the wires.

Let's see why. Assume we have wire A on the left and wire B on the right, and that the current in both wires go upward.  First, let's find the direction of the magnetic field produced by wire A at wire B: by using the right-hand rule, we see that since the current (the thumb) goes upward, the magnetic field (given by the other fingers) at wire B is directed inside the paper.
Then we can apply again the right-hand rule to see what is the force on wire B. The index gives the direction of the current (upward), the middle finger the direction of the magnetic field (inside the paper), and the thumb gives the direction of the force: to the left, so toward wire A. This means the force is attractive. (you can re-do the procedure on wire A, and you will find the force on wire A is directed toward wire B)
7 0
3 years ago
Consider the reaction X mc022-1.jpg Y + 2Z . If the molar solubility of X is multiplied by 2, the value of Ksp will be multiplie
Alex777 [14]
X -> Y + 2Z

So there are 2 different particles. 1 mol of X produces 1 mol of Y and 2 moles of Z.

Kps = [Y] [Z]^2

We will call “s” (solubility) the molarity of X

So the molarity of Y+ is also “s” (same number)

And the molarity of Z is “2s” (twice as much)

Kps = s*(2s)^2 = s*4s^2=4s^3

If s is multiplied by 2:

Kps = 4*(2s)^3=4*2^3*s^3=4*8*s^3

So Kps is multiplied by 8.

4 0
4 years ago
A 1.2-kg mass is projected from ground level with a velocity of 31.3 m/s at some unknown angle above the horizontal. A short tim
My name is Ann [436]

Answer:

The kinetic energy will be "399.65 J".

Explanation:

Given:

Mass,

m = 1.2 kg

Velocity,

v = 31.3 m/s

The total energy of mass will be:

⇒ E=K+U

or,

⇒ E=.5mv^2+mgh

By putting the values, we get

        =.5(1.2)(31.3)^2+0

        =0.6\times 979.69+0

        =587.81 \ J

Since,

The system's total energy is unchanged, then

⇒ E=K+U

or,

⇒ E=K+mgh

   587.81=K+1.2(9.8)(16)

   587.81=K+188.16

          K=587.81-188.16                

               =399.65 \ J

8 0
4 years ago
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