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3 years ago

How does the speed of visible light compare with the speed of gamma rays

Physics

1 answer:

DochEvi [55]3 years ago

3 0

Answer:

They are the same

Explanation:

Electromagnetic waves consist of perpendicular oscillations of electric and magnetic field, which oscillate perpendicularly to the direction of motion of the wave (transverse wave). One property of the electromagnetic waves is that they travel in a vacuum always at the same speed, called speed of light:

$c=3.0\cdot 10^8 m/s$

Electromagnetic waves are classified into 7 different types according to their frequency; from highest to lowest frequency, we have:

Gamma rays

X-rays

Ultraviolet

Visible light

Infrared

Microwaves

Radio waves

We see that both visible light and gamma rays are electromagnetic waves, so they both travel in a vacuum at the same speed, the speed of light.

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In a series circuit with three bulbs,

marysya [2.9K]

In a series circuit with three bulbs, the remaining two bulbs are not affected if one bulb burns out.
If a bulb goes out in your house, do all other bulbs go out? No.
Final answer: B

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3 years ago

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Two car collide in an intersection. The speed limit in that zone is 30 mph. The car (mass of 1250 kg) was going 17.4 m/s (38.9).

Musya8 [376]

Answer:

u₂ = 3.7 m/s

Explanation:

Here, we use the law of conservation of momentum, as follows:

$m_1u_1+m_2u_2=m_1v_1+m_2v_2\\$

where,

m₁ = mass of the car = 1250 kg

m₂ = mass of the truck = 2020 kg

u₁ = initial speed of the car before collision = 17.4 m/s

u₂ = initial speed of the tuck before collision = ?

v₁ = final speed of the car after collision = 6.7 m/s

v₂ = final speed of the truck after collision = 10.3 m/s

Therefore,

$(1250\ kg)(17.4\ m/s)+(2020\ kg)(u_2)=(1250\ kg)(6.7\ m/s)+(2020\ kg)(10.3\ m/s)\\\\(2020\ kg)(u_2) = 8375\ N.s + 20806\ N.s - 21750\ N.s\\\\u_2=\frac{7431\ N.s}{2020\ kg}$

u₂ = 3.7 m/s

5 0

3 years ago

Select the correct answer from each drop-down menu. A device that uses electricity and magnetism to create motion is called a __

Fittoniya [83]

<h3>Answer;</h3>

1st drop; Motor

2nd drop; Electricity

A device that uses electricity and magnetism to create motion is called a motor. In a reverse process, a device that uses motion and magnesium can be used to create electricity.

<h3>Explanation;</h3>

Motors are device which use electricity and magnetism to create motion. They pass alternating current through opposing pairs of magnets to create a rotating magnetic field which creates a magnetic field in the rotor of a motor, making it to spin around.
Electric motors work in a reverse process by using motion and magnetism to generate electricity. When a coil or loops of wire are exposed to a changing magnetic field, an electrical current arises or is induced.

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3 years ago

Which one of the following accurately describes the force of gravity?

Aloiza [94]

B. The gravity acceleration is in the same direction as the force of gravity, and thus towards the centre of the earth

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3 years ago

If each pull-up requires 300 J and Ben does a pull-up in 2 seconds, what is his power? 150 watts 300 watts 600 watts 750 watts

leonid [27]

Answer:

150 watts

Explanation:

300/2 = 150 watts

6 0

2 years ago

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