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3 years ago

Explain how wavelength and frequency are important when determining the type of light.

1 answer:

7 0

Wavelength and frequency are important because every frequency has its place on the electromagnetic spectrum. Also electromagnetic spectrum has many different wavelengths and frequencies on it . We only see a small fraction of what is created. The wavelength and frequency differs from wave to wave. You go from the lower frequency microwaves all the way up to the high frequency of gamma rays. It is important to determine the "type" of light because different wavelengths have different pulsation speed. The gamma rays pulse much faster then the light we see, and the light we see also goes faster than microwaves.

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To estimate the distance in kilometers of a flash of lightning, count the number of seconds between seeing the flash and hearing

Triss [41]

Answer:

Divide by 3

Explanation:

In order to estimate the distance traveled by a lightening flash in kilometers, we follow these simple steps:

Make a count of the number of seconds in between the period a flash occur and the thunder accompanied by the lightening flash is heard.
Dive the total number of seconds by 3 to get the distance traveled by the flash. This is because in order to cover 1 km, it roughly takes 3 seconds.

8 0

3 years ago

A car traveling at 60km/h undergoes uniform acceleration at a rate of 2/ms^2 until is velocity reached 120km/h determine the dis

jenyasd209 [6]

Explanation:

Given that,

Initial speed of a car, u = 60 km/h = 16.67 m/s

Acceleration, a = 2m/s²

Final speed, v = 120 km/h = 33.33 m/s

We need to find the distance traveled and the time taken to make the distance.

acceleration = rate of change of velocity

$a=\dfrac{v-u}{t}\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{33.33 -16.67 }{2}\\\\t=8.33\ s$

let the distance be d.

$d=\dfrac{v^2-u^2}{2a}\\\\d=\frac{33.33^{2}-16.67^{2}}{2(2)}\\\\d=208.25\ m$

Hence, the distance traveled and the time taken to make the distance is 208.25 m and 8.33 seconds respectively.

3 0

3 years ago

A vertical spring has a mass hanging from it, which is displaced from the equilibrium position and begins to oscillate. At what

Orlov [11]

Answer:

the object has least potential energy at mean position of the SHM

Explanation:

If a block is connected with a spring and there is no resistive force on the system

In this case the total energy of the system is always conserved and it will change from one form to another form

So here we will say that

Kinetic energy + Potential energy = Total Mechanical energy

As we can say that total energy is conserved so here we have least potential energy when the system has maximum kinetic energy

So here we also know that at mean position of the SHM the system has maximum speed and hence maximum kinetic energy.

So the object has least potential energy at mean position of the SHM

5 0

3 years ago

Which best describes a radioactive isitope

tatyana61 [14]

Answer:

The atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus

5 0

3 years ago

ball is dropped from rest and hits the ground 1.1 seconds later. What height was the ball released from?

Aleonysh [2.5K]

Height = 1/2 * 9.8 * (1.1^2)

5 0

4 years ago