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
nata0808 [166]
3 years ago
8

You are explaining to your friends why astronauts feel weightless while orbiting in the space shuttle. They ask you to prove thi

s mathematically. Calculate the acceleration of gravity 250 km above the Earth’s surface in terms of g.
(Use Rearth = 6.38x103 km.)
Physics
1 answer:
meriva3 years ago
5 0

Answer:

Explanation:

Force of gravity = GMm/r^2 = ma

a being the acceleration due to gravity at some distance r from the center of the Earth.  I'll use 6400 km for the radius of the Earth so r = 6734 km or 6734000 meters

a = GM/r^2

plugging in G = 6.67 x 10^-11

M is the mass of the Earth = 6 x 10^24

and r is from above

a = 8.825 m/s^2  = 0.9g

so 90% the acceleration of gravity on the surface.

You might be interested in
ARRANGE THE STEPS IN ORDER TO DESCRIBE WHAT HAPPENS TO A GAS WHEN IT COOLS
vredina [299]
What happens to has when it cools is ...
Step 1) They will start to form liquids, like condensation.
Step 2) As liquids cool, they will turn into solids.
Step 3) As solids cool, they become more stable and solid.
3 0
3 years ago
Belly-flop Bernie dives from atop a tall flagpole into a swimming pool below. His potential energy at the top is 7000 J (relativ
elena55 [62]

Answer:

KE₂ = 6000 J

Explanation:

Given that

Potential energy at top U₁= 7000 J

Potential energy at bottom U₂= 1000 J

The kinetic energy at top ,KE₁= 0 J

Lets take kinetic energy at bottom level =  KE₂

Now from energy conservation

U₁+ KE₁= U₂+ KE₂

Now by putting the values

U₁+ KE₁= U₂+ KE₂

7000+ 0 = 1000+ KE₂

KE₂ = 7000 - 1000 J

KE₂ = 6000 J

Therefore the kinetic energy at bottom is 6000 J.

5 0
3 years ago
Imagine a large block that sinks in a tub of water. You hold a much smaller block of the exact same material in your hand, above
goldenfox [79]
It will sink because mass does not affect the physical properties of the object.
3 0
3 years ago
What is always true of a liquid's shape and volume?
Natalija [7]
Molecules of liquid are far away from each other but less compared to gas. Liquid has the ability to flow. Liquid molecules can move. Liquid occupies the shape of the container. Thus, they do not have fixed shape. Liquid has fixed volume because they are not compressible(easily)
4 0
3 years ago
Thirty-five percent of natural sunlight is made up of
Elden [556K]

Answer: Visible light makes up 35% of natural light.

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is the net force on this object?
    8·2 answers
  • A 0.410 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 35.0 pC charge on it
    5·1 answer
  • Plz help
    7·1 answer
  • How many newtons of force are required to move a 54.87 kg object with an acceleration of 9.8 m/s/s?
    9·1 answer
  • A particle moves with a velocity v in a circle of radius r, then its angular velocity is equal
    6·1 answer
  • 1. 20.0 mL of a liquid has a mass of 58.2 g. What is the density of the liquid?
    13·2 answers
  • Imvu?<br> ..............................
    14·2 answers
  • What is the momentum of a baseball with a mass of 0.12 kg being thrown
    15·1 answer
  • What is harmonic motion
    6·1 answer
  • How many molecules of water are recycled into one molecule of glucose during photosynthesis?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!