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NARA [144]
2 years ago
15

An amplifier has a 50 watt output and a 5 watt input. what is the gain in decibels for this amplifier, rounded to the nearest de

cibel?
Physics
1 answer:
Marrrta [24]2 years ago
6 0
Gain in decibels is given by;

Gain db = 10*log (Po/Pi), where Po = Power output, Pin = Power input

Substituting;

Gain in db = 10 * log (50/5) = 10 db
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3) An electron moves in a circular orbit of radius 0.11 mm, counterclockwise as you look down at it, moving in a plane above and
andrey2020 [161]

Answer:

B = 0.15 T

Explanation:

To find the magnitude of the magnetic field you use the following formula:

B=\frac{mv}{qr}   ( 1 )

m: mass of the electron = 9.1*10^-31 kg

v: velocity of the electron = 3*10^6 m/s

q: charge = 1.6*10^-19

r: radius = 0.11mm = 0.11*10^-3 m

You replace the values of the parameters in the equation (1).

B=\frac{(9.1*10^{-31}kg)(3*10^6\frac{m}{s})}{(1.6*10^{-19}C)(0.11*10^{-3}m)}=0.15T

the magnetic field has a magnitude of 0.15 T

4 0
3 years ago
A,b,c,d please I don't understand it.
emmasim [6.3K]
For A: LED outdoor lighting.
Because you want it to be able to withstand outdoor conditions. If it can’t withstand... there’s no light... no light... no advertisement.

For B: it would be lithonium lights. It’s found in most offices and gives the best light for working day or night.

For C: you’ll want elevated lights so they are noticed for the plane to land and for people and others to see.

For D: you want white light and you want it to also be able to withstand outdoor conditions. Cars and people need to see at night, especially at night. Solar would be a great choice.

Hope this helps! I tried hard.
7 0
2 years ago
Questions
Damm [24]

Answer:

Explanation:

standard decimal form  of 6.36*10^4 is

6,3600.0

7 0
3 years ago
Heat energy is a form of _____ energy.
love history [14]
Heat energy is a form of kinetic energy
5 0
3 years ago
Read 2 more answers
If a gun is sighted to hit targets that are at the same height as the gun and 85 m away at the same height, how low, as a positi
Alex

If a gun is sighted to hit targets that are at the same height as the gun and 85 m away at the same height, how low, as a positive number in meters, will the bullet hit if aimed directly at a target 180 m away

The muzzle velocity of the bullet is 275 m/s

Answer:

y = -1.1109 m

Explanation:

Range = \frac{v^2sin2\theta}{g}

range = 85 m

velocity = 275 m/s

g = 9.8 m/s²

85 = \frac{(275)^2sin2 \theta}{9.8}

833=(275)^2sin2\theta

833= 75625sin2\theta

0.01101 =sin2 \theta

0.005505 =sin \theta

\theta =sin^{-1}(0.005505)

\theta = 0.3154^0

If the bullet is aimed at a target 180 m, time required to travel 180 m with horizontal component will be;

t=\frac{180}{275cos0.3154}

t = 0.6546 sec

To determine, how low as a positive number in meters.

y=vyt-\frac{gt^2}{2}

y = 275 sin(0.3154)*(0.6546)- \frac{9.8*(0.6546)^2}{2}

y = 0.9909 - 2.1018

y = -1.1109 m

7 0
3 years ago
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