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3 years ago

What is Minimum Threshold Frequency?

Physics

2 answers:

tatiyna3 years ago

8 0

Answer:

The threshold frequency is defined as the minimum frequency of incident radiation below which the photoelectric emission is not possible completely.

Lady bird [3.3K]3 years ago

4 0

the minimum frequency of radiation that will produce a photoelectric effect.

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Find the Horizontal (x) vector for these forces.

Anestetic [448]

Answer:

See the explanation below.

Explanation:

The force is a vector therefore we can decompose the force into components x & y. as we need the horizontal component of the force, we must use the cosine function of the angle.

$F_{1x}=30.8*cos(20)\\F_{1x}=28.94[N]\\F_{2x}=34.3*cos(20)\\\\F_{2x}= 32.23[N]$

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3 years ago

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3 years ago

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Which statement best describes how the temperature of the oceans surface water varies

Setler79 [48]

<span>heat capacity→ water has a high heat capacity, and salt water has an even higher one, so the temperatures of the oceans remain within a small range because As the heat rises you get more evaporation which actually cools the ocean down (Specific Heat of Water; Heat needed to break down hydrogen bonds)</span>

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4 years ago

If the speed of the wave along the rope is 3.2 m/s. Calculate the frequency of the wave

kotykmax [81]

Answer:

2Hz

Explanation:

Find the diagram attached

Using the formula;

v = fλ

v is the velocity

f is the frequency

λ is the wavelength

Given the following

v = 3.2m/s

λ = 4.8/3 = 1.6m

Get the frequency

f = v/λ

f = 3.2/1.6

f = 2Hertz

Hence the frequency of the wave is 2Hz

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3 years ago

A car traveling at 60 mph has how much more energy than a car going at 15 mph?

Liono4ka [1.6K]

4. KE increases by a factor of 16 is the answer

<u>Explanation:</u>

Kinetic energy = (1/2)mv² = 0.5 mv²

where

m = mass, and v = velocity.

So at 15 mph,

K E = 0.5 m (15) ² = 112.5 m

And at 60 mph,

K E = 0.5 m (60)² = 1800 m

m is the mass, and not meters.

So, 1800 m/112. 5 m = 16

16 times the Kinetic Energy.

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3 years ago

What is Minimum Threshold Frequency?​

What is Minimum Threshold Frequency?