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3 years ago

What do radio waves and microwaves have in common?

Physics

2 answers:

Nookie1986 [14]3 years ago

4 0

Both have longer wavelengths than visible light as their frequency is much smaller than visible light.

Romashka-Z-Leto [24]3 years ago

4 0

Answer:

Both have longer wavelengths than visible light.

Both are located to the right of visible light on the spectrum.

Both have lower radiant energy than visible light.

Explanation:

If electromagnetic waves are arranged in the order of the energy from highest to lowest energy range then we will have

1). Gamma rays

2) X rays

3) Ultraviolet rays

4) Visible light

5) Infrared waves

6) Microwaves

7) Radio waves

Now as per energy range we can say that both microwaves as well as radio waves must have small energy range and longer wavelength as compare to visible light.

SO correct answers are

Both have longer wavelengths than visible light.

Both are located to the right of visible light on the spectrum.

Both have lower radiant energy than visible light.

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1)Atmospheric decreases with the increase with in height?

lina2011 [118]

Answer:

Explanation:

pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.

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3 years ago

If mass of gold is 123.4g and its volume is 12.1cm cube, calculate its density

maxonik [38]

Answer:

10.198 g/cm³

Explanation:

ρ=m/V=123.4/12.1=10.198 g/cm³

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3 years ago

A car starts from rest at the top of a hill with 45 J of gravitational

kherson [118]

Answer:

The car will be moving at 5.48 m/s at the bottom of the hill

Explanation:

Principle of Conservation of Mechanical Energy

In the absence of friction, the total mechanical energy is conserved. That means that

$E_m=U+K$ is constant, being U the potential energy and K the kinetic energy

U=mgh

$\displaystyle K=\frac{mv^2}{2}$

When the car is at the top of the hill, its speed is 0, but its height h should be enough to produce the needed speed v down the hill.

The Kinetic energy is then, zero. When the car gets enough speed we assume it is achieved at ground level, so the potential energy runs out to zero but the Kinetic is at max. So the initial potential energy is transformed into kinetic energy.

We are given the initial potential energy U=45 J. It all is transformed to kinetic energy at the bottom of the hill, thus:

$\displaystyle \frac{mv^2}{2}=45$

Multiplying by 2:

$\displaystyle mv^2=90$

Dividing by m:

$\displaystyle v^2=\frac{90}{m}$

Taking square roots:

$\displaystyle v=\sqrt{\frac{90}{m}}$

$\displaystyle v=\sqrt{\frac{90}{3}}$

$v=\sqrt{30}$

v = 5.48 m/s

The car will be moving at 5.48 m/s at the bottom of the hill

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3 years ago

This multiple-concept example provides a review of the concepts that play roles here. An engine has an efficiency of 63% and pro

frozen [14]

Answer:

8387 J

Explanation:

work produced= 5284 J

efficiency of 63%

the efficiency η= Work done÷ heat supplied

$\eta= \frac{W}{Q_s}$

$0.63= \frac{5284}{Q_s}$

solving $Q_s= 8397 J$

therefore, the input heat= 8387 J

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3 years ago

Jefferson's administration was the beginning of popular government in the United States.

marshall27 [118]

He repealed federal taxes, Jefferson reduced military spending. He bought Louisiana from France. Considering only all these positive points and leaving aside the negative ones, one would say that the statement that "Jefferson's administration was the beginning of popular government in the United States." Is True!

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3 years ago