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adoni [48]
3 years ago
9

Explain its significance. Check all that apply. Check all that apply. In chemical and physical processes, matter exchanges energ

y either as heat or work or both with the surroundings. Systems with high potential energy tend to change in the direction of lower potential energy, releasing energy into the surroundings. In the exchanges, the total energy is always changed; energy is created and destroyed. In the exchanges, the total energy is always conserved; energy is neither created nor destroyed. Systems with low potential energy tend to change in the direction of higher potential energy, releasing energy into the surroundings. In only physical changes, matter exchanges energy with its surroundings.
Physics
1 answer:
Helga [31]3 years ago
4 0

The question is incomplete. Here is the complete question.

Explain the significance of the Law of Conservationof Energy. Check all that apply.

1) In chemical and physical processes, matter often exchange energy with its surrounding.

2) System with low potential energy tend to change in the direction of higher potential energy, releasing energy into the surroundings.

3) In the exchanges, the total energy is always conserved; energy is neither created nor destroyed.

4) In chemical and physical changes, matter never exchange energy with its surroundings.  

5) In the exchanges, the total energy is always changed; energy is created and destroyed.

6) Systems with high potential energy tend to change in the direction of lower potential energy, releasing energy into its surroundings.

Answer and Explanation: <em><u>Law of Conservation of Energy</u></em> states that total energy is constant in any process. It may change in form or be transferred from one system to another, but the total remains the same.

So, analysing each statement above, we have:

In chemical and physical processes, matter CAN exchange energy with its surroundings, so first and fourth statements are incorrect.

Systems with higher potential energy tend to change in the direction of lower potential energy, and can release energy into its surroundings, so sixth statement is correct.

As cited above, in exchanges, total energy is always conserved, i.e. it is always constant, which means inside the system, energy is being transformed into another type of energy or transferred to other matter. Fifth statement is correct.

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Explain how atomic interactions determine a material to be transparent and opaque?
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Answer:

Explanation below.

Explanation:

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A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 146 cm and makes an angl
svetlana [45]

Answer:

B = 191.26 cm

θ = -14.73°

Explanation:

given,

magnitude of the first displacement(A) = 146 cm

at an angle of 124°

resultant magnitude = 137 cm

and angle made with x-axis by the resultant(R) = 32.0°

component of A in X and Y direction

A x = A cos θ  = 146 cos 120° = -73 cm

A y = A sin θ = 146 sin 120° = 126.4 cm

now component of resultant in x and y direction

R x = 137 cos 35°

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R y = 137 sin 35°

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resultant is the sum of two vectors

R = A + B

R x = A x + B x

B x =  112.2 - (-73) = 185.2 cm

B y = R y - A y

B y = 78.6 - 126.4 = -47.8 cm

magnitude of B

B = \sqrt{B_x^2+B_y^2}

B = \sqrt{185.2^2+-47.8^2}

B = 191.26 cm

angle\theta = tan^{-1}\dfrac{-47.8}{185.2}

θ = -14.73°

6 0
3 years ago
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