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4 years ago

Una cuerda es puesta a vibrar 400 veces en 4 segundos Cual es la frecuencia del sonido emitido?

Physics

1 answer:

Readme [11.4K]4 years ago

4 0

n = number of vibrations set in the string = 400 vibrations

t = total time taken for "n" vibrations set in the string = 4 second

f = frequency of the sound emitted due to vibrations set in the string

frequency of the sound emitted due to vibrations set in the string is given as

f = n/t

inserting the above values in the above formula

f = 400/4

f = 100 Hz

hence the frequency of sound comes out to be 100 Hz

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What is the the acceleration of a proton that is 4.0 cm from the center of the bead? input positive value if the acceleration is

QveST [7]

Missing detail in the text:
"<span>A small glass bead has been charged to + 25 nC "

Solution
The force exerted on a charge q by an electric field E is given by
</span> $F=qE$
<span>Considering the charge on the bead as a single point charge, the electric field generated by it is
</span> $E=k_e \frac{Q}{r^2}$
with $k_e = 8.99\cdot 10^9 Nm^2/C^2$ , $Q=+25 nC=25 \cdot 10^{-9}C$ is the charge on the bead. We want to calculate the field at $r=4.0 cm=0.04 m$ :
$E=(8.99\cdot 10^9) \frac{25\cdot 10^{-9}}{(0.04)^2}=1.4\cdot 10^5 V/m$
The proton has a charge of $q=1.6\cdot 10^{-19}C$ , therefore the force exerted on it is
$F=qE=1.6\cdot 10^{-19}C \cdot 1.4\cdot 10^5 V/m=2.25\cdot 10^{-14} N$

And finally, we can use Newton's second law to calculate the acceleration of the proton. Given the proton mass, $m=1.67\cdot 10^{-27} kg$ , we have
$F=ma$
$a= \frac{F}{m}= \frac{2.25\cdot 10^{-14} N}{1.67\cdot 10^{-27} kg}=1.35 \cdot 10^{13} m/s^2$

The charge on the bead is positive, and the proton charge is positive as well, therefore the proton is pushed away from the bead, so:
$a=-1.35 \cdot 10^{13} m/s^2$

6 0

3 years ago

When the amplitudes of waves are equal, which frequency waves have the most energy?

Molodets [167]

Answer:

higher frequency waves will have more energy

Explanation:

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2 years ago

Which state of matter is made up of particles that build repeating patterns such as the crystalline structure of sodium chloride

SCORPION-xisa [38]

B. solid

Explanation:

The solid state of matter is made up of particles that build repeating patterns. Solid is one of the four physical states of matter.

Matter is described as anything that has weight and occupies space.
The four states of matter are solid, liquid, gas and plasma.
Solid particles are known to be closely packed and held together by very strong attractive forces.
Solid like sodium chloride are said to be crystalline because they have crystals.
Crystals are ordered atomic structures formed by repeating units of the fundamental molecular units.
The repeating patterns of the crystals builds to form a solid.
Other states of matter do not posses the repeating crystalline structure of solids.

Learn more:

Crystalline brainly.com/question/6528456

#learnwithBrainly

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3 years ago

Learning Goal: To be able to calculate work done by a constant force directed at different angles relative to displacement

svlad2 [7]

Answer:

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Explanation:

The work done by the force can be calculated as :

$W=F\times s$