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LuckyWell [14K]
3 years ago
10

A microwave oven operates at 2.00 ghz . what is the wavelength of the radiation produced by this appliance? express the waveleng

th numerically in nanometers.
Physics
1 answer:
yan [13]3 years ago
7 0
<span>Since frequency and wavelength have inverse relationship. It can be expressed by the equation: ν.λ = c Where, v = frequency of the electromagnetic wave. λ = it's wavelength c = the speed of light in a vacuum. v = 2.00 Ghz x 10^9 Hz / 1 Ghz = 2.00 x 10^9 Hz that means that in one second it covers 2.00 x 10^9 cycles. λ = 3.10^8 m/s / 2.00 x 10^9 /s = 1.25E-10 nanometers</span>
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Geothermal energy is derived from the sun. True or False?
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<span>So we want to know is it true or false that geothermal energy is derived from the Sun. Geothermal energy is heat energy that is stored in the Earth. Solar energy is energy that we get by collecting sunlight via solar collectors and turning it into electrical energy. So the answer is FALSE. </span>
3 0
3 years ago
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At its closest approach, a moon comes within 200,000 km of the planet it orbits. At that point, the moon is 300,000 km from the
krok68 [10]

Answer:

s₁ = 240,000 km

Explanation:

The distance between both the focuses f₁ and f₂ will be the sum of distances of the moon from each focus at a given point. Therefore,

s = s₁ + s₂

where,

s = total distance between the focuses = ?

s₁ = distance between f1 and moon = 200,000 km

s₂ = distance between f₂ and moon = 300,000 km

Therefore,

s = 200,000 km + 300,000 km

s = 500,000 km

Now, when the distance from f₂ becomes 260,000 km, then the distance from f₁(planet) will become:

s = s₁ + s₂

500,000 km = s₁ + 260,000 km

s₁ = 500,000 km - 260,000 km

<u>s₁ = 240,000 km</u>

5 0
3 years ago
An electrostatic paint sprayer has a 0.17 m-diameter metal sphere at a potential of 25.0 kV that repels charged paint droplets o
Troyanec [42]

Answer:

q=0.236uC

Explanation:

From the question we are told that:

Diameter d=0.17m

Radius r=0.17/2=>0.085

Potential E=25.0kV

Generally the equation for Potential on spere is mathematically given by

E=\frac{1}{4 \pi e_0}*\frac{q}{r}

Therefore

q=\frac{25*10^3*0.085}{\frac{1}{4 \pi e_0}}

Where

\frac{1}{4 \pi e_0}=9*10^9

Therefore

q=\frac{25*10^3*0.085}{(9*10^9}}

q=0.236uC

4 0
3 years ago
Two cars started at the same position and were driven through a city using different streets. The red car traveled north 2 miles
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<span>The green car traveled a shorter distance, but the displacement of the cars was equal.</span>
4 0
3 years ago
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Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Satellite A is to o
Oksi-84 [34.3K]

Answer:

=0.43

Explanation:

Given

mv^2/R=GMm/R^2

Make V the subject

V^2=(GM/R)

For satellite A

Va^2= (GM/R)=(GM/(5580+6370)*10^3)

Vb^2=(GM/(21000+6370)*10^3)

Va^2=(GM/11950*10^3)

Vb^2=(GM/27370*10^3)

But kinetic Energy Ek of orbiting object is MV^2/2=GMm/2R

Hence EkA= GMm/2*11950*10^3)

EkB= GMm(2*27370*10^3)

EkB/EkA= 2*11950*10^3/2*27370*10^3

=0.43

5 0
3 years ago
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