1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arte-miy333 [17]
3 years ago
5

Frank D. Drake, an investigator in the SETI (Search for Extra-Terrestrial Intelligence) program, once said that the large radio

telescope in Arecibo, Puerto Rico, can detect a signal which lays down only a picowatt of power over entire surface of the Earth. What is the power received by the radio telescope if the diameter of the antenna is300 m? What would be the power of the source at the center of our galaxy which couldprovide such a signal? The center of galaxy is 22000 light years away. Assume that source is radiating uniformly in all directions and that the Earth is a disk with the radiusof 6378 km.

Engineering
1 answer:
AlexFokin [52]3 years ago
4 0

Answer:

attached below

Explanation:

You might be interested in
You want to find all files on your server that have either the SGID or SUID permission set. Which command should you use to obta
aalyn [17]

Answer:

For SGID you type this

$ find . -perm /4000

For SUID you type this

$ find . -perm /2000

Explanation:

Auxiliary file permissions, that are commonly referred to as “special permissions” in Linux are needed in order to easily find files which have SUID (Setuid) and SGID (Setgid) set.

After typing

$ find directory -perm /permissions

Then type the commands in the attachment below to obtain a list of these files with SGID and SUID.

3 0
3 years ago
What issues does society try to forget in order to not have to deal with them ?
velikii [3]

Answer: Homelessness, Drug addiction, Mental Illness, Climate change.

Explanation:

Society would rather be ignorant to/ ignore all of these realities so they do not have to stop specific behaviors or actually acknowledge other people and help. Sometimes people are so stressed out about their own lives, they can not bare another persons issues. People are ignorant to climate change because correcting it requires massive changes and society is selfish and unwilling to change.

6 0
2 years ago
What line separates two lanes traveling in the same direction
soldier1979 [14.2K]

Answer:

White lane lines separate lanes of traffic moving in the same direction. (UK)

5 0
2 years ago
Read 2 more answers
a cubical box 20-cm on a side is contructed from 1.2 cm thick concrete panels. A 100-W light bulb is sealed inside the box. What
Flura [38]

Answer:

Temperature on the inside ofthe box

Explanation:

The power of the light bulb is the rate of heat conduction of the bulb, dq/dt = 100 W

The thickness of the wall, L = 1.2 cm = 0.012m

Length of the cube's side, x = 20cm = 0.2 m

The area of the cubical box, A = 6x²

A = 6 * 0.2² = 6 * 0.04

A = 0.24 m²

Temperature of the surrounding, T_0 = 20^0 C = 273 + 20 = 293 K

Temperature of the inside of the box, T_{in} = ?

Coefficient of thermal conductivity, k = 0.8 W/m-K

The formula for the rate of heat conduction is given by:

dq/dt = \frac{kA(T_{in} - T_0)}{L} \\\\100 = \frac{0.8*0.24(T_{in} - 293)}{0.012}\\\\T_{in} - 293 = \frac{100 * 0.012}{0.8*0.24} \\\\T_{in} - 293 = 6.25\\\\T_{in} = 293 + 6.25\\\\T_{in} = 299.25 K\\\\T_{in} = 299.25 - 273\\\\T_{in} = 26.25^0 C

5 0
3 years ago
8. A voltmeter measures a voltage drop of 600 V across a heating element while an
Alchen [17]

Answer:

How do I calculate voltage drop?

To calculate voltage drop, E, across a component, you need to know the resistance of the component and the current thru it. Ohm's Law is E=I⋅R , which tells us to then multiply I by R . E is the voltage across the component also known as voltage drop

Explanation:

5 0
2 years ago
Other questions:
  • Explain the differences between 1- Energy 2- Power 3- Work 4- Heat Your answer should explain the mathematica and physical meani
    5·1 answer
  • What is productivity as it relates to labor?
    11·1 answer
  • Explain in detail the difference between the microstructures of a cold worked sample and Recrystallized sample ?
    15·1 answer
  • In a production turning operation, the foreman has decreed that a single pass must be completed on the cylindrical workpiece in
    7·1 answer
  • A steel bar 100 mm long and having a square cross section 20 mm x 20 mm is pulled in
    6·1 answer
  • On a given day, a barometer at the base of the Washington Monument reads 29.97 in. of mercury. What would the barometer reading
    6·1 answer
  • When determining risk, it is necessary to estimate all routes of exposure in order to determine a total dose (or CDI). Recognizi
    8·1 answer
  • 2.(10 pts)A proposed engine cycle employs an ideal gas and consists of the following sequence of transformations; a) Isothermal
    12·1 answer
  • Convert 103.69 kN to TN.
    14·1 answer
  • Linus is using a calculator to multiply 5,426 and 30. He enters 5,426 x 300 by mistake. What can Linus do to correct his mistake
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!