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vladimir1956 [14]
4 years ago
5

In the equation w=fd cos 0, what is the angle 0?

Physics
1 answer:
maria [59]4 years ago
4 0
Then it is 0. Hope that helps
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Which of the following determines whether light shining on a metal surface will eject electrons from that surface?
PtichkaEL [24]
From that list, only the frequency makes the difference.

Einstein won his only Nobel Prize for his explanation of this effect.
8 0
3 years ago
Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitt
Andrews [41]

<h2>The distance covered by man is 6.4 m</h2>

Explanation:

In the interference of two waves , these will fall upon each other .

It will make nodes and anti-nodes in between . There will be one node in between two anti-nodes and  will be one anti-node between two nodes .

The distance between two nodes is λ/2 and distance between two anti-nodes is also λ/2

Thus if the man is at constructive interference , so to move at destructive interference , it has to cover a distance equal to λ/4

Here λ = velocity/frequency = 344/632 = 18.4 m

Thus the distance he will cover = 18.4/4 = 4.6 m

7 0
3 years ago
A boy of mass 40kg while running develops a momentum of 180Ns. Calculate the velocity of the boy​
Setler79 [48]

Answer:

\boxed {\boxed {\sf v= 4.5 \ m/s}}

Explanation:

The formula for momentum is:

p=mv

(<em>p</em> is momentum, <em>m</em> is mass, and <em>v </em>is velocity)

Let's rearrange the formula for velocity, or v.

\frac{p}{m} =v

Velocity can be found by dividing the momentum by the mass.

The momentum is 180 kilograms meter per second. The mass of the boy is 40 kilograms.

p=180 \ kg*m/s \\m=40  kg

Substitute the values into the formula.

v=\frac{180 \ kg*m/s}{40 \ kg}

Divide. Note that the kilograms or "kg" will cancel each other out.

v=\frac{180 \ m/s}{40 }

v= 4.5 \ m/s

The velocity of the boy is <u>4.5 meters per second.</u>

7 0
3 years ago
; we call this
mixer [17]

Answer:

decreases;inversely

7 0
3 years ago
A lightbulb has an efficiency of 1.8%. How much heat energy (not light energy) is generated by the bulb every second if the bulb
nika2105 [10]
A. Is the answer I'm glad I could help any other questions please feel free to ask.
7 0
3 years ago
Read 2 more answers
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