In unguided medium (free space), the electromagnetic (EM) signal wave spreads as it leaves the transmit antenna. Since the power of the EM signal resides at the surface area of the wave front, signal power is described as signal power density (i.e., watts per area).

a. True
b. False

Answers

Answer 1

Answer:

a. True

Explanation:


Related Questions

True or false Self Driving Cars are examples of emerging technology

Answers

true! 99% of time they are smart cars!

a strut of length l has its ends built into a material which exerts a constraining couple equal to k times the angular rotation in radians. show that the buckling load p is given by the equation
[tex] \tan( \alpha )l \div 2 = p \div \alpha k \: \: and \: \: \alpha { \}^{2} [/tex]

[tex] \alpha [/tex]

Answers

Answer:

fxruwrisris84drid85d59s59e95etod

Explanation:

urzrjxrjxrjr

68dtudrusditxx4ixtiurzrjzruzurzjfzirzjrz

What kind of plan or development of road can be done to avoid traffic?​

Answers

Answer: Breakdown Lanes

Reason: With breakdown lanes when a car needs to stop it can go to the backdown lane and fix its issue.

Which of the following activities may involve the use of plant architecture?
A) crop rotation
B) companion planting
C) algal billion
D) raised gardening

Answers

Answer:

companion planting

Explanation:

i failed and saw all the correct answers

table saws you can use with __ or __ but not both at the same time

Answers

Answer:

wood or metal

Explanation:

sorry if incorrect

I need help with this ASAP please. This is basic carpentry, I just missed the first half of the year so I am a little behind. Can somebody answer the two questions?

Answers

Answer:

the  half answer is pretty easy just look at it really really good hope this helps..

Explanation:

An automobile having a mass of 1100 kg initially moves along a level highway at 120 km/h relative to the highway. It then climbs a hill whose crest is 80 m above the level highway and parks at a rest area located there. Use a reference with kinetic and potential energy each equal to zero for the stationary highway before the hill. Let g = 9.81 m/s^2.

For the automobile, determine its change in kinetic energy and its change in potential energy, both in kJ. For the automobile, determine its change in kinetic energy, in kJ.
a. -8594
b. -663.1
c. -6.63x10^5
d. 663.1

Answers

Answer:

[tex]-6111.11\ \text{kJ}[/tex]

[tex]863.28\ \text{kJ}[/tex]

Explanation:

m = Mass of automobile = 1100 kg

v = Velocity of car = 120 km/h = [tex]\dfrac{120}{3.6}\ \text{m/s}[/tex]

h = Height of hill = 80 m

g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]

Change in kinetic energy

[tex]KE=\dfrac{1}{2}m(u^2-v^2)\\\Rightarrow KE=\dfrac{1}{2}\times 1100\times (0-(\dfrac{120}{3.6})^2)\\\Rightarrow KE=-611111.11\ \text{J}[/tex]

Change in kinetic energy is [tex]-6111.11\ \text{kJ}[/tex]

Change in potential energy is given by

[tex]PE=mgh\\\Rightarrow PE=1100\times 9.81\times 80\\\Rightarrow PE=863280\ \text{J}[/tex]

The change in potential energy is [tex]863.28\ \text{kJ}[/tex].

Which physical quantity measures the rate at which an object’s velocity changes?

A.
force
B.
speed
C.
acceleration
D.
torque

Answers

C acceleration

Acceleration is change is velocity over time. Rate is another word for time

Answer:

I think the answer is b speed

Explanation:

Please look at the attachments and help me with these questions

Answers

Answer:

there are no attachments

Explanation:

A communications system transmits a message. The probability that the message will be received is p. To be confident that a message is received at least once, the system transmits it n times. If a message is received, the receiver turns off and does not turn back on.

a. Assuming all transmissions are independent, what is the PMF of K, the number of times the pager receives the same message?
b. Assume p=0.8. What is the minimum value of n that produces a probability of 0.95 of receiving the message at least once?

Answers

Answer:

Follows are the solution to the given points:

Explanation:

In point a:

In the PMF of K, that pager receives its same message number of times, that is  [tex]=\tiny \binom{n}{k}p^{k} (1-p)^{n-k}[/tex]

In point b:

The possibility of getting number of cultural at least once in x:

[tex]\to 1-P(\text{not receiving it at all})\\\\\to 1-(0.2)x\\\\\to 1-(0.2)x>0.95\\\\\to (0.2)x<0.05 \\\\[/tex]

appling the [tex]\log[/tex]:

[tex]\to x>0.25[/tex]

The value x is equal to 3.

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