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
kolezko [41]
3 years ago
12

Radio waves travel at the speed of light, approximately 300,000,000 m/s. Part A How much time does it take for a radio message t

o travel from the Earth to the Moon and back? The average distance from Earth to the Moon is 384,000 km. Express your answer to three significant figures and include the appropriate units. t t =
Mathematics
2 answers:
jenyasd209 [6]3 years ago
7 0

Answer:

Step-by-step explanation:

First you want to understand that every time a radio wave goes 300,000,000 meters a second passes, literally what meter per second means.    of course it doesn't go that far, it goes 384,000 one way and then the same distance back, which makes 768,000.  Under a third of the distance to make 1 second, so it will be less than one second.  

You also want to understand the formula for speed.  speed = distance / time.  Whch also means, to find time you can change it to be time = distance / speed.  And hey, we have distance and speed.  768,000 / 300,000,000 = .00256, I'll leave the significant figures to you unless you need help with them.  but that's .00256 of a second.  or .00256 s

Radda [10]3 years ago
4 0

Answer: 2.56

Step-by-step explanation:

Given: Radio waves travel at the speed of light, approximately 300,000,000 m/s.

i.e. Speed = 300,000,000 m/s

Distance from Earth to the Moon= 384,000 km

Since 1 km = 1000 m

Then , Distance from Earth to the Moon= 384,000,000 m

Distance from Earth to the Moon and back = 2(384,000,000)=768 ,000,000 m

The formula we use here :

\text{Time}=\dfrac{\text{Distance from Earth to the Moon and  back}}{\text{Speed}}

i.e.  \text{Time}=\dfrac{768 000000}{300000000}=2.56

Hence, it will take 2.56 seconds  for a radio message to travel from the Earth to the Moon and back.

You might be interested in
Houa has an action figure collection. She keeps some in a display case and the rest on the wall. 82 of her action figures are on
Law Incorporation [45]

Answer:

u just 82 + 59% = 130.38

Step-by-step explanation:

8 0
2 years ago
Help plz I really need to pass
Tresset [83]

Answer:

2.56

Step-by-step explanation:

The equation they dive u: d = 16t^2, so in the question they said what's the distance, d, if t = 0.4

So you just have to replace t with 0.4:

d = 16t^2

d = 16(0.4)^2

d = 16(0.16)

d = 2.56

3 0
2 years ago
-(-21) = -21 true or false
Kryger [21]

Answer:

False

Step-by-step explanation:

-(-21) is positive 21 since there are 2 negative signs, and -21 is negative, therefore they are not the same.

Hope this helps!

8 0
3 years ago
Read 2 more answers
What is the size of angle ABC
otez555 [7]
The size of the triangle is 55 degrees.
7 0
3 years ago
Read 2 more answers
The sum of 5 consecutive integers is 265.<br><br>What is the fifth number in this sequence?
tiny-mole [99]
The number missing is 234
5 0
2 years ago
Read 2 more answers
Other questions:
  • Can the sides of a triangle have lengths 1, 3, and 10?
    6·1 answer
  • In circle C major arc ABD is represented by 4x+50. what is the value of x in the diagram
    7·1 answer
  • Cathy bought 7 pizzas that contained 8 slices of pizza. She wanted to split the pizza equally among 14 of her friends. How many
    9·1 answer
  • Describe the end behavior of the graph of the function
    6·1 answer
  • How do you graph the line with an equation <br> X=3y
    9·2 answers
  • Match the name of the shape to its word description:
    15·1 answer
  • For a field trip, the school bought 23 sandwiches for $4.60 each and 5 bags of chips for $1.25 each. How much did the school spe
    13·1 answer
  • The ratio 7:5 is eqvivalent to 28
    11·1 answer
  • Solve for X<br> (10x - 1)=(14x - 37)
    15·1 answer
  • You are assigned by columbus high school to design a playground as part of your volunteer service. the playground consists of tw
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!