Which statement correctly explains molecular motion in different states of matter using the kinetic theory?

The entropy of an isolated system must be conserved, so it never changes.a. Trueb. Fasle

Snowcat [4.5K]

Answer:

B: False

Explanation:

The second law of thermodynamics states that: the entropy of an isolated system will never decrease because isolated systems always tend to evolve towards thermodynamic equilibrium which is a state with maximum entropy.

Thus, it means that the entropy change will always be positive.

Therefore, the given statement in the question is false.

6 0

3 years ago

The chandra x-ray observatory is used to study _____.

hjlf

Black holes and images of x-rays

5 0

3 years ago

Read 2 more answers

At what location in a circuit is the electrical potential energy the greatest

Eduardwww [97]

It's not the potential energy. It's just the potential.

It's greatest at the positive terminal of the battery or power supply.

4 0

4 years ago

Why are plants generally green?

e-lub [12.9K]

The correct answer is option D, "The pigment chlorophyll reflects green light waves"

The chloroplast with in the plants consists of chlorophyll (green colour pigment) which is highly absorbent to the long and short wavelengths such as red and blue wavelength of visible spectrum and reflects green wavelengths thereby producing green colour visualizations to the viewer. The two common chlorophyll usually found in the leaves are chlorophyll A and B. Chlorophyll A is majorly responsible for reflecting the green light

7 0

3 years ago

An electric motor spins at 1000 rpm and is slowing down at a rate of 10 t rad/s2 ; where t is measured in seconds. (a) If the mo

REY [17]

Answer:

a) The tangential component of acceleration at the edge of the motor at $t = 1.5\,s$ is -1.075 meters per square second.

b) The electric motor will take approximately 3.963 seconds to decrease its angular velocity by 75 %.

Explanation:

The angular aceleration of the electric motor ( $\alpha$ ), measured in radians per square second, as a function of time ( $t$ ), measured in seconds, is determined by the following formula:

$\alpha = -10\cdot t\,\left[\frac{rad}{s^{2}} \right]$ (1)

The function for the angular velocity of the electric motor ( $\omega$ ), measured in radians per second, is found by integration:

$\omega = \omega_{o} - 5\cdot t^{2}\,\left[\frac{rad}{s} \right]$ (2)

Where $\omega_{o}$ is the initial angular velocity, measured in radians per second.

a) The tangential component of aceleration ( $a_{t}$ ), measured in meters per square second, is defined by the following formula:

$a_{t} = R\cdot \alpha$ (3)

Where $R$ is the radius of the electric motor, measured in meters.

If we know that $R = 7.165\times 10^{-2}\,m$ , $\alpha = 10\cdot t$ and $t = 1.5\,s$ , then the tangential component of the acceleration at the edge of the motor is: