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siniylev [52]
3 years ago
9

The density for gold is 19.3 g/cm3. What would be the mass of a 45 cm3 piece of gold?

Physics
2 answers:
ASHA 777 [7]3 years ago
8 0

Answer:

675.5g

Explanation:

The formula for density is: D = m/V.

To solve this problem, we need to rearrange this formula to solve for mass:

m = D x V.

Next, we plug the given values in for density, D, and volume, V:

m = 19.3 g/cm3 x 35 cm3

So, m = 675.5 g

lyudmila [28]3 years ago
6 0

Answer:

868.5 g

Explanation:

Mass= Density x Volume

Mass= 19.3 x 45

=868.5

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What is the frequency of the fundamental mode of vibration of a steel piano wire stretched to a tension of 440 N? The wire is 0.
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Complete Question

The complete question is shown on the first uploaded image

Answer:

Explanation:

From the question we are told that

    The tension is  T  =  440 \  N

     The length of the wire is l =  0.600 \  m

     The mass is  m  =  5.60 \ g = 0.0056 \  kg

Generally the frequency is mathematically represented as

            f  =  \frac{1}{2l}  *  \sqrt{\frac{T}{\frac{m}{l} } }

=>        f  =  \frac{1}{2 * 0.600 }  *  \sqrt{\frac{440}{\frac{0.0056}{0.600} } }

=>        f = 181 \ Hz

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What is semiconductor device that produces electric current through the effect for which its named?
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The semiconductor device that produces electric current through the effect is termed as transistor.

To find the answer, we have to know more transistor.

<h3>What is transistor?</h3>
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The 400-turn primary coil of a step-down transformer is connected to an ac line that is 120 V rms. The secondary coil voltage is
KengaRu [80]

Explanation:

The given data is as follows.

             V_{1} = 120 V,    V_{2} = 6.50 V

             N_{1} = 400,     N_{2} = ?

Formula to calculate the number of turns in secondary coil are as follows.

          \frac{N_{1}}{N_{2}} = \frac{V_{1}}{V_{2}}

Putting the given values into the above formula as follows.

         \frac{N_{1}}{N_{2}} = \frac{V_{1}}{V_{2}}

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Thus, we can conclude that number of turns in the secondary coil are 22.

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