Answer:
Rate of change of length as a function of time is given by
Explanation:
The length as function of time is given by
Differentiating with respect to time we get
Science is connected to spirituality in that they both deal with the body, soul, and mind. Science study's the makeup of the body, soul, and mind in it's relationship with health and survival. Spirituality deals with the inside of the body, soul, and mind. It is interested in how inner entities create outer entities.
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In real machines, efficiency is always <em>less </em>than 100% .
Answer:
B) momentum and mechanical energy
Explanation:
In classical physics, a closed system is a system that does not exchange any matter with the surrounding, and on which there are no external forces acting on it.
Due to this definition, we have the following consequences:
- In a collision in a closed system, momentum is always conserved. This is because there is exchange of matter with the surroundings (so, no mass can be lost), and also because there are no external forces acting on the objects inside the system. In fact, the variation of the total momentum of the system is related to the net force acting on the system:
but since the net force F is zero, then the variation of momentum, , is also zero, therefore the momentum is constant.
- Also, mechanical energy is conserved. Mechanical energy is the sum of potential energy and kinetic energy of the system: again, since there are no external forces acting on the system, energy cannot be dissipated, so the total energy of the system cannot change.
<h2><u>Q</u><u>u</u><u>e</u><u>s</u><u>t</u><u>i</u><u>o</u><u>n</u>:-</h2>
The speed of a wave is 40 m/s. If the wavelength is 80 centimeters, what is the frequency of the wave ?
<h2><u>A</u><u>n</u><u>s</u><u>w</u><u>e</u><u>r</u>:-</h2>
<h3>Given:-</h3>
Velocity (V) = 40 m/s
Wavelength = 80 cm = 0.8 m
<h3>To Find:-</h3>
The frequency (F) of the wave.
<h2>Solution:-</h2>
We know,
40 = F × 0.8
F =
F = 50
<h3>The frequency of the wave is <u>5</u><u>0</u><u> </u><u>H</u><u>z</u>. [Answer]</h3>