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2 years ago

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What is transmitted by EM waves?

1 answer:

mamaluj [8]2 years ago

6 0

Answer:

What is transmitted by EM waves?

energy

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Jamie is a hairstylist who works in a salon. He noticed that when many of the stylist or blow drying hair the power goes out wha

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2 years ago

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If the volume of a container of gas is reduced, what will happen to the pressure inside the container?.

AfilCa [17]

Answer:

The pressure of the gas will increase

Explanation:

When gas is put into a container, for example, a balloon, the gas expands to fill the space it can occupy. Since gas is not a solid or a liquid, its particles are all over the place - they are constantly moving and vibrating. As such, when too much gas is blown into a balloon, it will pop. So, when the volume of the container decreases, the pressure of the gas will increase the smaller it gets. Vice versa, the greater the space, the less pressure that will be present in the container.

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2 years ago

A fishing boat uses a sonar device which sends sound waves to the water that travel at 1000 m/s. The fishing boat detects a sign

Alexeev081 [22]

I think its D answer

sorry I dont have explanation but I think its D

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2 years ago

A satellite moves in a stable circular orbit with speed Vo at a distance R from the center of a planet. For this satellite to mo

slava [35]

Answer:

The new speed must be $\frac{V_0}{\sqrt{2}}$

Explanation:

In order for the satellite to be on a stable orbit around the planet, the gravitational attraction must be equal to the centripetal force that keeps the satellite in circular motion:

$G \frac{Mm}{R^2}= m\frac{V_0^2}{R}$

where G is the gravitational constant, M is the mass of the planet, m is the mass of the satellite, V0 the speed of the satellite at distance R from the center of the planet.

We can re-write V0, the initial satellite speed, by re-arranging the equation:

$V_0 = \sqrt{\frac{GM}{R}}$

Now, if we want the satellite to orbit at a distance of 2R, the new tangential speed must be:

$V' = \sqrt{\frac{GM}{2R}}=\frac{1}{\sqrt{2}} \sqrt{\frac{GM}{R}}= \frac{V_0}{\sqrt{2}}$

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2 years ago

A charge of 4.5 × 10-5 C is placed in an electric field with a strength of 2.0 × 104 . What is the electric force acting on the

arlik [135]

Answer:

0.9N/C

Explanation:

-The force of a charged particle in an electric field is given by the equation;

$F=qE\\\\q-charge\\$

#we substitute the values of the charge and field strength:

$F=qE\\\\=4.5\times10^{-5}\times2.0\times10^4\\\\=0.9 \ N/C$

Hence, the electric force acting on the charge is 0.9N/C

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2 years ago