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
MariettaO [177]
3 years ago
6

A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 8.70 ✕ 107 km. Radio waves travel at

the speed of light (3.00 ✕ 108 m/s). How many seconds does it take for the signal to reach the Earth?

Physics
1 answer:
Ahat [919]3 years ago
3 0

Answer: 2.9 × 10 E 3 sec

Explanation: The explanation is attached

You might be interested in
A skier (down a straight course) is able to enter the starting gate with a speed of 1 m/sec and the average acceleration down th
Zigmanuir [339]
He was moving at 31 m/s
3 0
3 years ago
If a rock is thrown upward on the planet mars with a velocity of 11 m/s, its height (in meters) after t seconds is given by h =
Butoxors [25]
(a) 3.56 m/s 
(b) 11 - 3.72a 
(c) t = 5.9 s 
(d) -11 m/s  
For most of these problems, you're being asked the velocity of the rock as a function of t, while you've been given the position as a function of t. So first calculate the first derivative of the position function using the power rule. 
y = 11t - 1.86t^2 
y' = 11 - 3.72t 
Now that you have the first derivative, it will give you the velocity as a function of t. 
(a) Velocity after 2 seconds. 
y' = 11 - 3.72t 
y' = 11 - 3.72*2 = 11 - 7.44 = 3.56 
So the velocity is 3.56 m/s  
(b) Velocity after a seconds. 
y' = 11 - 3.72t 
y' = 11 - 3.72a  
So the answer is 11 - 3.72a  
(c) Use the quadratic formula to find the zeros for the position function y = 11t-1.86t^2. Roots are t = 0 and t = 5.913978495. The t = 0 is for the moment the rock was thrown, so the answer is t = 5.9 seconds.  
(d) Plug in the value of t calculated for (c) into the velocity function, so: 
y' = 11 - 3.72a
 y' = 11 - 3.72*5.913978495
 y' = 11 - 22
 y' = -11 
 So the velocity is -11 m/s which makes sense since the total energy of the rock will remain constant, so it's coming down at the same speed as it was going up.
3 0
3 years ago
.
eimsori [14]

Explanation:

d =  \frac{1}{2} a {t}^{2}  + vt \\ d = 75 \\ t = 5 \\ v = 0 \\  \\ 75 =  \frac{1}{2}  \times 25a + 0 \\ a = 6 \frac{m}{ {s}^{2} }  \\

7 0
3 years ago
Compare and contrast the geocentric view of the solar system with the heliocentric view of the solar system
Mandarinka [93]
This is fairly easy. The earlier view of the solar system (geocentric) was all based on how other planets and the sun were constantly revolving the earth and we were completely stationary. The Heliocentric view has been proved to be accurate, and it is that the sun is stationary and the planets are revolving it. The similarities are that in that time, it was a continued belief that the planets were the Roman Gods, i.e. Jupiter, Neptune. Another thing is that they were correct in the Geocentric theory with the thought that the planets revolved around something.
7 0
3 years ago
An 18 month-old child is hypotonic and cannot fully extend the neck and trunk against gravity. Which position would be MOST EFFE
Flura [38]

Answer:

b. Prone on 45 degree wedge positioned on the floor.

Explanation:

According to the pediatric therapists the most effective position  to place the child in to facilitate anti gravity movement and promote hand usage is to prone on 45 degree wedge positioned on the floor.

5 0
3 years ago
Other questions:
  • An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom?
    6·2 answers
  • Which of the following statements about psychological constructs is true?
    10·1 answer
  • Which equation is used to calculate the weight of an object on a planet?
    6·2 answers
  • What is the primary difference between the states of matter? color of the substance mass of the substance number of atoms in the
    5·2 answers
  • True or False? PLEASE HELP ME​
    5·1 answer
  • Can someone please explain the conservation of momentum? I want to be a rocket scientist lol
    14·1 answer
  • उत्तोलक हुन् ?
    11·1 answer
  • Which of the following is not an example of work being done on an object?
    8·2 answers
  • Why does gravity on Earth have a stronger attraction with you than the sun has with you? Plsssssss help I really need this rn
    13·1 answer
  • Having so much trouble with this : which fact represents evidence for the big bang theory
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!