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3 years ago

What is the period, T, of a wave produced by a tuning that makes 400 vibrations in one second? Group of answer choices

Physics

1 answer:

Finger [1]3 years ago

6 0

Answer:

T=0.0025s

Explanation:

Vibrations per second is the definition of the S.I. unit Hertz (Hz), which is a frequency. This means that 400 vibrations in one second refers to a frequency of 400Hz. We can get our period T in seconds by using the formula T=1/f, which for our case is:

T=1/f=1/400Hz=0.0025s

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statuscvo [17]

To solve this problem it is necessary to apply the concepts related to Hooke's Law as well as Newton's second law.

By definition we know that Newton's second law is defined as

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By Hooke's law force is described as

$F = k\Delta x$

Here,

k = Gravitational constant

x = Displacement

To develop this problem it is necessary to consider the two cases that give us concerning the elongation of the body.

The force to keep in balance must be preserved, so the force by the weight stipulated in Newton's second law and the force by Hooke's elongation are equal, so

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We have two equations with two unknowns therefore solving for both,

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$l = 8.877cm$

In this way converting the units,

$k = 3.136N/cm(\frac{100cm}{1m})$

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3 years ago

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The heating element in a kettle behaves like a resistor. A particular kettle needs to operate at 230 V, with a power of 1500 W.

dedylja [7]

Answer:

R = 35.27 Ohms

Explanation:

Given the following data;

Voltage = 230V

Power = 1500W

To find the resistance, R;

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Where:

V is the voltage measured in volts.

R is the resistance measured in ohms.

Substituting into the equation, we have;

1500 = 230²/R

Cross-multiplying, we have;

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R = 35.27 Ohms.

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Help would be appreciated.

Kaylis [27]

Answer:

10m

Explanation:

1000kg/m³÷100KPa

=10m

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musickatia [10]

Surface area and Mass

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