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
Gemiola [76]
3 years ago
6

Astronomy: At is closest approach, Mars is about 5.6X10^7 km from Earth and its apparent size is about 0.00012 radians. What is

the approximate diameter of Mars?
Mathematics
2 answers:
algol133 years ago
7 0
6700 km  
For this problem, there are two basic ways of solving it and both will give approximately the same answer. The easiest way is to simply ignore the slight difference in length of the adjacent leg of the right triangle and hypotenuse and calculate the arc tangent. The equation is 
tan θ = opp/adj 
adj * tan θ = opp 
5.6x10^7 km *0.000120000000576 = opp 
6.720000032256x10^3 = opp 
6720 km = opp  
So the diameter of Mars is about 6700 km.  
The other way is to actually acknowledge that the hypotenuse and adjacent leg are different lengths and divide the apparent size by 2 for performing the trig, then double the result. So: 
tan θ = opp/adj 
adj * tan θ = opp 
5.6x10^7 km * 0.000060000000072 = opp
 5.6x10^7 km * 0.000060000000072 = opp 
3.360000004032x10^3 = opp
 3.360000004032x10^3 * 2 = diameter
 6.720000008064x10^3 = diameter 
 And you may notice the digits at the end of the results do differ. But they're so insignificant, that the final results in both cases is the same. So to 2 significant digits, the diameter of Mars is 6700 km.
Mariana [72]3 years ago
6 0
1.) D = 2pi * d * A / 360 degrees; Where:
   pi = 3.14;
   d = distance or 56,000,000 km (5.6x10^7 to standard notation)
   A = angular size in degrees or .00688 degrees (.00012 radian to degrees)

  D = 2(3.14) * 56,000,000 * .00688 / 360
      = 6.28 * 385,280 / 360
      = 2,419,558.4 / 360
 D  = 6,720.996 or 6,721

Therefore, 6,721 km. is the approximate diameter of Mars.
You might be interested in
3x – 15y = 12<br> 2x - 10y = 8<br><br><br> What is the ordered pair?
katrin [286]
The answer should be 9,1
5 0
3 years ago
A right triangle has legs E and f and hypotenuse H. The value of e= 10. The angle opposite leg f is 35°. Which expression can be
mariarad [96]

Answer:

sorry buddy i dont know the answer hope this helps

Step-by-step explanation:

Isn't this what u did to me when i needed help and took my points away.

6 0
3 years ago
Two numbers that add to -4 and multiply to -45.
cricket20 [7]

Answer:

-9 and 5 make -4 and -45

Step-by-step explanation:

-9 and 5 make -4 and -45

5 0
3 years ago
Pls help!!!!!!!! Will give brainliest!!!!!!!!!!!
prohojiy [21]
Okay so lets look at the equation given
a ^{2} + {b}^{2} = {c}^{2}
this is the Pythagorean theorem, this equation holds true to all right angle triangles.

for the "a" and "b" terms must be the two shortest lengths and "c" must be the longest length.
why? because "c" represents the hypotenuse in this theorem and the hypotenuse is by definition the longest side of a right triangle.

(side note: always draw a picture, it helps a lot if you doodle a bit to get an idea of what you are working with)

we are given three lengths : 3 , 4, and 5 (im ignoring the measurements for now)

we can look at it two ways with a picture and through algebra

try to draw a right triangle with the given info. you'll see there are only two cases were this is possible the picture above is one case where this is not possible

now we can look at this algebraically
a = 3 \\ b = 4 \\ c = 5
(but "a" and "b" can swap lengths)

now with the Pythagorean theorem we can see how this plays out
{a}^{2} + {b}^{2} = {c}^{2} \\ {3 }^{2} + {4}^{2} = {5 }^{2} \\ 9 + 16 = 25 \\ 25 = 25
and heres with "a" and "b" lengths swapped
{4}^{2} + {3}^{2} = {5}^{2} \\ 16 + 9 = 25 \\ 25 = 25
now here's a case when we let 5 , our longest length , become a leg and let one our shorter lengths take the place of "c"

a = 5 \\ b = 3 \\ c = 4 \\ {5}^{2} + {3}^{2} = {4}^{2} \\ 25 + 9 = 16 \\ 34 = 16 \:
obviously 34 does not equal 16

hope this helped you out

4 0
3 years ago
What’s an equation for<br> Five times a number
aalyn [17]

Answer: 5 x ?

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • (-5ab-5a-1) - (4ab+3)
    7·1 answer
  • Given:
    8·1 answer
  • Is 3/15 repeating decimal
    7·1 answer
  • The gallup poll interviews 1600 people. of these, 18% say that they jog regularly. the news report adds: "the poll had a margin
    8·1 answer
  • Estimate the product of 41.03 x 0.513.
    14·1 answer
  • Help finding mean of data set A and data set B?
    8·1 answer
  • If U is the set of all natural numbers less than 10, A is its subset containing all natural numbers less than 6 and B⊂U consists
    14·1 answer
  • The figures are similar. The area of one figure is given. Find the area of the other figure to the nearest whole number. The are
    11·1 answer
  • How many sides are there?
    12·1 answer
  • Please help me<br><br> no random links pls
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!