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3 years ago

14

Sound waves have the ability to cause objects to vibrate. If a paperback book is placed near a speaker and the volume of the spe

aker is amplified, the book can be torn apart into small pieces.

1 answer:

erik [133]3 years ago

4 0

Answer:

yes with a lot of time it eventualy could be, but in short term no

Explanation:

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A certain electric circuit obeys Ohm's law. If the resistance of the circuit is doubled, what will happen to the current through

netineya [11]

Answer:

currrent will be halved

Explanation:

v = ir

v/r = i multiply both sides by 1/ 2

v / (2r) = 1/2 i

4 0

3 years ago

Explain the necessity of smoothing the output voltage before applying it to a transistor

ra1l [238]

In simple words, smoothing can be defined as the circuit which is done to eliminate the ripple from the yield of a direct current power supply.

<u>Explanation:</u>

<u>Necessity of smoothing:</u>

Smoothing can be also applied in the form of a capacitor that acts to decrease or level out variations in a signal. And these capacitors are mostly used after power supply in voltage.
The yield DC voltage of a half-wave rectifier provided in the figure of a sinusoidal wave.
In a method to provide a constant DC voltage from a corrected AC source, a filter or smoothing circuit is required.

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6 0

3 years ago

What are the properties of different types of electromagnetic waves?

Pani-rosa [81]

Answer:

1. All electromagnetic waves travelS at 3×10⁸m/s in vacuum

2.They are transverse in nature.

3.they can travel through vacuum.( doesn't require any materials for their transmission.

4.They under go phenomena of diffraction,reflection, refraction, interference and polarization.

HOPE IT HELPED.

PLEASE PICK BRAINLIEST

6 0

2 years ago

Sir Dudley the Dextrous is loading cannons on top of the castle's tallest towers in preparation for an expected attack. He slips

jeka94

Answer:

786 J

Explanation:

Let g = 9.81 m/s2. The vertical distance that the canon ball must have traveled within 1.65 s is (ignoring air resistance):

$h = gt^2/2 = 9.81*1.65^2/2 = 13.35 m$

So the work done by gravity would be the product of gravity force and the distance it traveled

[tex]E_p = Ph = mgh = 6*9.81*13.35 = 786 J

7 0

3 years ago

3. Which equation shows the relationship between the Kelvin and Celsius temperature scales? K = 273 – °C K = °C + 273 K = °F + 2

Alborosie

Answer: $K=\°C+273.15$

Explanation:

The Kelvin ( $K$ ), is the unit of temperature of the scale created by the British physicist William Thomson (Lord Kelvin) in 1848, <u>taking as a base the Celsius scale</u>, establishing the zero point for this scale in the absolute zero which is in $-273.15\°C$ .

This was achieved by observing that when a gas cools, its volume decreases proportionally to its temperature. That is, <u>for each degree of temperature that the gas decreases, its volume also decreases by a certain percentage. </u>

After which, Kelvin made the calculations and it turned out that at a temperature of $-273.15\°C$ the volume of the gas would be zero (theoretically).

It should be noted that the Kelvin is the unit of temperature of the International System of Units and that although the scale starts at absolute zero (theoretical), in which no molecule should move, in reality it is not so, because according to quantum physics, at this temperature the molecules retain a residual movement.

7 0

4 years ago