Answer: Money
Explanation:
Both money and energy are part of a cycle.
What does this mean?
Energy is not created nor destroyed, it is transformed into other forms of energy (for example: thermal energy, acoustic energy, kinetic energy, among others). Something similar happens with the flow of money in economic transactions, in which <u>money is exchanged for products, work or services and continues its flow in the market.</u>
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Therefore, energy is a physical quantity with properties somewhat similar to <u>money</u>.
Answer:
Multiple answers:
1. Power output P=17.59W
2.Intensity 160m I=17.6W/
3. dB = 77.3
4. f=178.5 Hz
Explanation:
First one comes from the expression
where<em> I </em>is the intensity, <em>P </em>is the power and <em>r </em>is the radio of the spherical wave, or in this case, the distance <em>x</em>. I solved for the Power by multiplying Intensity with the area (4
Second one is done with:
Solving for Intensity 2, the result mentioned.
The third is simply computed with
And finally the last one is done with doppler effect, taking into account the speed of the air as in 10ºC 337m/s.
Where <em>Finitial</em> is the frequency emitted and <em>s</em> is the speed of the sound. The wind blowing in positive is, in principle, going away of the observer.
Answer:
ω = 5.5 rad/s
Explanation:
- Assuming no external torques present during the instant that the clump of clay is dropped on the turntable, total angular momentum must be conserved.
- The angular momentum of a rotating rigid body, can be expressed as follows:
where I = moment of inertia regarding the axis of rotation, and ω =
angular speed of the rotating body.
- Since the angular momentum must keep constant, this means that it must be satisfied the following equality:
where L₀ = I₀ * ω₀, Lf = If * ωf.
I₀ is the moment of inertia of a solid disk rotating around an axis
passing through its center, as follows:
If, is the moment of inertia after dropping the clump of clay, which adds
its own moment of inertia as a point mass, as follows:
- Replacing I₀, If and ω₀ in (2), we can solve for ωf, as follows:
Answer:
because dust particles wants to stay in rest but when we hit or beat carpet it comes in motion and due to unbalanced inertia it's fall down..