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
Simplify.<br> 12<br> 24<br> A) 3<br> 2<br> B) 6<br> 2<br> C) <br> 1<br> 2<br> D) <br> 2<br> 2
AleksandrR [38]
12/24 simplifies to 1/2, seeing as 12 is half of 24. :) Your answer is C.
5 0
3 years ago
Which list shows these numbers in order from least to greatest?
ira [324]

Answer:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15...

3 0
3 years ago
Y = 4x – 10<br> y = 2<br> What is the solution to the system of equations?
ruslelena [56]
Y=4x-10
y=2
2=4x-10
12=4x
x=3
y=2
7 0
3 years ago
Read 2 more answers
you want to deposit 15000 in a bank at an interest rate of 7 percent per year. what is the future value of this money after thre
Stolb23 [73]
Approximately about $18,490 

<span>PV= $15,000 </span>
<span>FV= solve for </span>
<span>PMT= 0 </span>
<span>I/YR= 7% </span>
<span>N= 36 </span>

<span>put these in your HP II calcu and you will get the approximate answer.
- b
e
x
t
e
m
(FAIL HARD)</span>
3 0
3 years ago
Eric bought a laptop for 664 it was marked 50 off because it was an opened product he also got a 15% discount which was taken of
Artyom0805 [142]

Answer:

The original price of the laptop is 840

Step-by-step explanation:

Here, we want to calculate the original price of a laptop, given the amount that was paid off and the discount percentage enjoyed.

Firstly, let’s add back the 50 taken off. That makes a total of 50 + 664 = 714

Now, we remember he was also given 15% off. Let the price paid be x;

The 15% of x is equal the difference between x and the 714

Thus;

15/100 * x = x - 714

15x/100 = (x-714)

15x = 100(x-714)

15x = 100x -71400

100x-15x = 71400

85x = 71400

x = 71400/85

x = 840

6 0
3 years ago
Other questions:
  • How to reduce to lowest form <br>1/4 + 2/5
    6·2 answers
  • Determine the intercepts of the line that correspond to the following table of values
    6·1 answer
  • In your science fair project, you fed peanuts to chickens and their eggs were larger. Now you want to determine how many peanuts
    9·2 answers
  • what are the values of m∠abc, m∠cbf, and m∠dbe in the given figure? Explain or show your work. A good 55 points will go to the o
    9·1 answer
  • Joe wants to saw a wooden plank into 3/4 -meter pieces. The length of the wooden plank is 15/4meters. How many 3/4 -meter pieces
    8·1 answer
  • Ayesha ordered a bed set on 4th August, 2020. It was delivered to her house 9 months 2 weeks 4 days later. When was the bed set
    11·1 answer
  • Paul's car is 13 feet long. He is making a model of his car that is the actual size. What is the length of the model?
    8·1 answer
  • There are 27 performances in a dance recital. The ratio of hip hop to ballet is 5:4.
    15·1 answer
  • If two complementary angles have measures of (5x + 3) and (3x - 1)º. Find the value of x.​
    13·1 answer
  • Determine any data values that are missing from the tablo, assuming that the data represent a linear function.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!