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vesna_86 [32]
3 years ago
12

A television remote control uses infrared light with a wavelength of 940 nm. What is the frequency of the light?

Physics
1 answer:
Ronch [10]3 years ago
5 0

Answer:

Frequency = 3.19 * 10^14 Hz or 1/s

Explanation:

Relationship b/w frequency and wavelength can be expressed as:

C = wavelength * frequency, where c is speed of light in vacuum which is 3.0*10^8 m/s.

Now simply input value (but before that convert wavelength into meters to match the units, you do this by multiply it by 10^-9 so it will be 940*10^-9)

3.0 * 10^8 = Frequency * 940 x 10^-9

Frequency = 3.19 * 10^14 Hz or 1/s

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Describe what happens to chromosomes before mitosis.
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Explanation:

Before mitosis, the chromosomes are copied. They then coil up, and each chromosome looks like a letter X in the nucleus of the cell. The chromosomes now consist of two sister chromatids. Mitosis separates these chromatids, so that each new cell has a copy of every chromosome

6 0
3 years ago
A soccer ball rests on the ground in a stationary position. Which of the following best describes the forces acting on the ball?
Andrews [41]
It is balanced force nothing is being applied I did this already
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2 years ago
Find the power load P in kilowatts of an electrical circuit that takes a current I of 17 amperes at a voltage V of 320 volts if
MA_775_DIABLO [31]

Answer: P = 5.44 KW

Explanation:

The formula for calculating power is expressed as

P = VI

where

v is the voltage

I is the current

From the information given,

v = 320

I = 17

Thus,

P = 320 x 17 = 5440 W

We would convert it to KW by dividing by 1000. It becomes

P = 5440/1000

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6 0
1 year ago
An object, accelerating from rest at a constant rate, travels over 28 m in 11 s. What is its final velocity?
Paul [167]

Answer:

answer is 3

Explanation:

by using s= [(v+ u)/2] x t

28= (v+ 0)/2 x 11

v= 5.09 ms^-1

4 0
3 years ago
ppose that you hold a vibrating 340 Hz tuning fork near a guitar string that is vibrating at 350 Hz. What you hear is?
galben [10]

Answer:

A beat with the frequency of 10Hz.

Explanation:

The frequencies from the tuning fork and guitar will cancel each other.

The frequency of tuning fork = 340Hz

The frequency of guitar string= 350Hz

The offset = 350Hz - 340Hz = 10Hz

A 10Hz frequency sound is still heard.

3 0
3 years ago
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