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
sdas [7]
3 years ago
12

How many seconds will light leaving Los Angeles take to reach the following locations (a) San Francisco (about 500km), (b) Londo

n (~10,000km), (c) the Moon (400,000km), (d) Venus (0.3 A.U. from Earth at its closest approach). Please show me the calculations that you used to deterime your answers.
Mathematics
1 answer:
kondor19780726 [428]3 years ago
3 0

Answer:

a) It takes 0.0017s for the light to reach San Francisco.

b) It takes 0.033s for the light to reach London.

c) It takes 1.334s for the light to reach Mars.

d) It takes 149.7s for the light to reach Venus.

Step-by-step explanation:

Here we can solve this problem by using this following formula:

s = \frac{d}{t}

In which s is the speed(in km/s), d is the distance(in km) and t is the time(in s).

The light speed is 299 792 458 m / s = 299,792.458 km/s, so s = 299,792.458

(a) San Francisco (about 500km)

Find t when d = 500. So

s = \frac{d}{t}

299,792.458 = \frac{500}{t}

299,792.458t = 500

t = \frac{500}{299,792.458}

t = 0.0017s

It takes 0.0017s for the light to reach San Francisco.

b) London(about 10,000km)

Find t when d = 10,000. So

s = \frac{d}{t}

299,792.458 = \frac{10,000}{t}

299,792.458t = 10,000

t = \frac{10,000}{299,792.458}

t = 0.033s

It takes 0.033s for the light to reach London.

(c) the Moon (400,000km)

Find t when d = 400,000. So

s = \frac{d}{t}

299,792.458 = \frac{400,000}{t}

299,792.458t = 400,000

t = \frac{400,000}{299,792.458}

t = 1.334s

It takes 1.334s for the light to reach Mars.

(d) Venus (0.3 A.U. from Earth at its closest approach).

Each A.U. has 149,59,7871 km.

So 0.3 A.U. = 0.3*(149,597,871) = 44,879,361.3. This means that d = 44,879,361.3. So:

s = \frac{d}{t}

299,792.458 = \frac{44,879,361.3}{t}

299,792.458t = 44,879,361.3

t = \frac{44,879,361.3}{299,792.458}

t = 149.7s

It takes 149.7s for the light to reach Venus.

You might be interested in
Two sides of a triangle have sides 11 and 16. The length of the third side must be greater than
postnew [5]

Answer:

c

Step-by-step explanation:

7 0
2 years ago
Simplify (5+2i)(1-3i)
larisa86 [58]

Answer:

5-15i+2i-6(i^2)

-6(i^2)-13i+5

4 0
3 years ago
If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesi
Dovator [93]

Answer:

Our decision rule will be to reject The null hypothesis H0 if the test statistic is less than -1.645, or if it is greater than +1.645.

Step-by-step explanation:

The hypotheses would be;

Null hypothesis;H0: μ = 500

Alternative hypothesis;Ha: μ ≠ 500

Since it's two - tailed at 0.1 level of significance, then each tail will contain 5% or 0.05. From the z-table attached, the corresponding critical value of 0.05 is approximately 1.645 standard deviations from the mean.

Thus, our decision rule will be to reject The null hypothesis H0 if the test statistic is less than -1.645, or if it is greater than +1.645.

7 0
3 years ago
Two lines that have the same slope do not intersect at any points ​
Crazy boy [7]

if you are looking for the solution then is <em>Infinitely many solutions</em>

4 0
2 years ago
Which table of ordered pairs represents a proportional relationship?
natali 33 [55]

Answer:

B

Step-by-step explanation:

Every (x,y) pair is equal to each other, thus making them proportional :)

5 0
1 year ago
Other questions:
  • A team played 25 games and won 17 of them. what percent did the team win?
    6·2 answers
  • What is the area of the polygon below?
    15·2 answers
  • What is the midpoint of a segment whose endpoints are (-12, -7) and (8, -11)
    8·1 answer
  • At the city museum, child admission is $5.40 and adult admission is $9.10. On Monday, three times as many adult tickets as child
    6·1 answer
  • A woman whose eyes is 1.6 m above The ground find that the angle of elevation to the top of her house is 12°. If she is 40 m fro
    12·1 answer
  • When you multiply and negative times a negative your answer will be:
    5·1 answer
  • Mel opened a savings account in April with an initial deposit of $250. Each month after April, Mel deposited an additional $60.
    11·1 answer
  • Combine terms: 12a + 26b -4b – 16a
    9·2 answers
  • Please help me it’s due right now?!?! <br> Find the missing side of each triangle.
    13·1 answer
  • Help me pleaseeee this is due tomorrow
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!