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3 years ago

Are the divisions of the electromagnetic spectrum distinct? Explain your answer

Physics

1 answer:

yKpoI14uk [10]3 years ago

7 0

Answer:

Explanation:

Are the divisions of the electromagnetic spectrum distinct?

The answer is NO.

To explain my answer, there are some points to be noted

1.) There are no clear divisions between the different ranges or bands in the electromagnetic spectrum. The divisions are somewhat arbitrary

2.) The naming of subdivisions is also arbitrary. For instance, microwaves are sometimes regarded as a subdivision of radio waves

3.) The ranges of x-ray and gamma ray overlaps

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3 years ago

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A 55-kg block, starting from rest, is pushed a distance of 5.0 m across a floor by a horizontal force Fp whose magnitude is 140

max2010maxim [7]

Answer:

The answer is "151.25 J and -547.64 J".

Explanation:

$u = 0\\\\v = 2.35\ \frac{m}{sec}\\\\d = 5.0 \ m\\\\$

Using formula:

$v^2 = u^2 + 2 \times a \times d\\\\2.35^2 = 0^2 + 2 \times a \times 5\\\\a = \frac{2.35^2}{10} \\\\$

$= 0.55 \ \frac{m}{sec^2}\\\\$

$F_{net} = m \times a\\\\F_{net} = 55 \times 0.55 = 30.25\ N\\\\$

Calculating the Work by net force

$W = F_{net}\times d\\\\W = 30.25 \times 5 = 151.25 \ J\\\\$

The above work is converted into thermal energy.

Now,

$F_{net} = F_p - F_f\\\\F_p = 140 \ N\\\\F_f = u_k\times m \times g = u_k \times 55 \times 9.81\\\\F_f = 539.55 \times u_k\\\\30.25 = 140 - u_k \times 55 \times 9.81\\\\u_k = \frac{(140 - 30.25)}{(55\times 9.81)}\\\\uk = 0.203 = \text{Coefficient of friction}\\\\W_f = -F_f \times d\\\\W_f = -0.203 \times 55 \times 9.81 \times 5\\\\Work\ done\ by\ friction = -547.64 \ J$

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If two swimmers compete in a race, does the faster swimmer develop more power?

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Answer:

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svet-max [94.6K]

Answer:

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