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Ymorist [56]
2 years ago
7

Multiply 0.00032 cm by 4.02 cm and express the answer in scientific notation

Physics
2 answers:
FromTheMoon [43]2 years ago
4 0
0.00032cm*4.02=1.2864 × 10^-3 in scientific notation.
nignag [31]2 years ago
3 0

Answer

1.2864*10^{-3} cm^{2}

Explanation:

First we multiply as normal:

0.00032 cm * 4.02 cm = 0.0012864 cm²

It is important to multiply the units too which is why centimeters become square centimeters.

Then we write the answer in scientific notation:

0.0012864 cm^{2} = 1.2864*10^{-3} cm^{2}

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Assume a small 11 kg crate is attached to a parachute. The chute pulls up on the crate with 150 N.
MaRussiya [10]

Explanation:

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∑F = F − mg

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b. From Newton's second law, the net force equals the mass times acceleration:

∑F = ma

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c. Acceleration is the change in velocity over change in time.  Assuming the crate is released from rest:

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3 years ago
The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2. The wave is incident u
Hatshy [7]

Answer:

The  total energy is  T  =  169.02 \ J

Explanation:

From the question we are told that

    The  Poynting vector (energy flux ) is  k  =  0.939 \ W/m^2

    The length of the rectangle is  l  =  1.5  \ m

    The  width of the rectangle is  w =  2.0 \ m

    The time taken is t  =   1 \ minute  =  60 \ s

The total electromagnetic energy falls on the area is mathematically represented as

      T  =  k  *  A  *  t

Where A  is the area of the rectangle which is mathematically represented as

           A= l *  w

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substituting values

        T  =  0.939 *  3 *  60

        T  =  169.02 \ J

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