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maksim [4K]
3 years ago
15

Radio waves are readily diffracted around buildings, whereas light waves are negligibly diffracted around buildings. This is bec

ause radio waves
Physics
1 answer:
Tom [10]3 years ago
6 0

Answer:

Radio waves have longer wavelength

Explanation:

Radio wave is an electromagnetic frequency that has the ability to travel through long distance. They have frequencies shuttling been the range of 10^4 hz and a frequency of 10^12 hz

Light wave is also called visible light. This is because it is visible to the naked eye, despite it being in the electromagnetic spectrum. It's frequency is usually between 4*10^-7 hz and a frequency of 7*10^-7 hz.

As can be seen from both, the radio waves length are quite far stronger than that of the light waves.

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What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?
OLEGan [10]
This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.
6 0
3 years ago
Read 2 more answers
Pelicans tuck their wings and free-fall straight down whei} diving for fish. Suppose a pelican starts its dive from q height of
Dominik [7]

Answer:

3.3 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 16+0^2}\\\Rightarrow v=17.72\ m/s

v=u+at\\\Rightarrow 17.72=0+9.81\times t\\\Rightarrow \frac{17.72}{9.81}=t\\\Rightarrow t=1.81 \s

The fish needs to see the pelican before 0.2 seconds in order to escape so the time pelican has is 1.81-0.2=1.61 seconds

In that time the pelican would have traveled

s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times 1.61+\frac{1}{2}\times 9.81\times 1.61^2\\\Rightarrow s=12.71\ m

So, the pelican would be 16-12.71 = 3.3 m above the water.

6 0
3 years ago
What is the average velocity of the person taking this walk?
Butoxors [25]
5 would be the answer
6 0
3 years ago
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2. The convex mirror shown below has an object placed 15cm in front of it. An image is formed 35 cm
Elena-2011 [213]

Answer:

m = image distance/object distance

m=35/15=7/3

f=uv/(u+v)

35*15/(35+15)

f=10.5cm

4 0
3 years ago
Need help transforming one formula to another!
Sindrei [870]

Hello! I don't know if this will help you any but I worked it out, got nothing on it. So, I just had my twin help me and he had nothing either. But, this is just how to find the transformation. Seems like this is already complete to me.

To find the transformation, compare the equation to the parent function and check to see if there is a horizontal or vertical shift, reflection about the x-axis or y-axis, and if there is a vertical stretch.

Parent function : y=√a

Horizontal shift : None

Vertical shift : none

Reflection about the x-axis : none

Vertical stretch : Stretched.

I am so sorry if this doesn't help you but to me, in both my eyes and my brother's eyes, this already looks complete. I hope this helps you out. Again, so sorry if it doesn't.

-Karleif ☺

5 0
4 years ago
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