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
Wewaii [24]
3 years ago
6

What linear speed must an earth satellite have to be in a circular orbit at an altitude of 159 km?

Physics
1 answer:
IgorLugansk [536]3 years ago
8 0
Gravitational acceleration, g = GM/r^2. Additionally, for a satellite in a circular orbit, g = v^2/r

Where, G = Gravitational constant, M = Mass of earth, r = distance from the center of the earth to the satellite, v = linear speed of the satellite.

Equating the two expressions;
v^2/r = GM/r^2
v = Sqrt (GM/r);
But GM = Constant = 398600.5 km^3/sec^2
r = Altitude+Radius of the earth = 159+6371 = 6530 km

Substituting;
v = Sqrt (398600.5/6530) = 7.81 km/sec = 781 m/s
You might be interested in
What is respiration?
Neporo4naja [7]
The most accurate answer is C. B could be true, but it's not just breathing in
3 0
3 years ago
why is it important to create pictorial and physical models before trying to solve an equation, solving a physics problem
Romashka [77]
Many fundamental laws of physics and chemistry can be formulated when doing this.
5 0
2 years ago
Read 2 more answers
A 5 meter long ladder leans against a wall. The bottom of the ladder slides away from the wall at the constant rate of 1 3 m/s.
Oksana_A [137]

Answer:9.75 m/s

Explanation:

Given

Length of ladder (L)=5 m

Foot the ladder is moving away with speed of \frac{\mathrm{d} x}{\mathrm{d} t}=13 m/s

From diagram

x^2+y^2=L^2------1

at x=3

y^2=25-9=16

y=4 m

Now differentiating equation 1 w.r.t time

2x\frac{\mathrm{d} x}{\mathrm{d} t}+2y\frac{\mathrm{d} y}{\mathrm{d} t}=0

x\frac{\mathrm{d} x}{\mathrm{d} t}=-y\frac{\mathrm{d} y}{\mathrm{d} t}

3\times 13=-4\times \frac{\mathrm{d} y}{\mathrm{d} t}

\frac{\mathrm{d} y}{\mathrm{d} t}=-\frac{3\times 13}{4}=-9.75 m/s

negative indicates distance is decreasing with time

5 0
3 years ago
Why are overuse injuries particularly frustrating set-backs?
olganol [36]
Because they are caused by your exercise 
7 0
3 years ago
Read 2 more answers
A penny rolls along the table for a distance of 1.3 meters. Jackie pushes it 40 centimeters further in the same direction.
brilliants [131]
40 meters times 1 meter over 100 centimeters equals 0.4 meters. 1.3 meters + 40 centimeters =. 1.3 m + 0.4 m = 1.7 m. The answer is 1.7 meters
7 0
3 years ago
Other questions:
  • In astronomy, the term perihelion refers to the point in the orbit of an asteroid, comet, or planet when it is closest to the su
    15·1 answer
  • An Athlete is injured on field his teammates see that the injury is moderately swollen in the athlete reports the area is numb w
    7·1 answer
  • Which one of the following is NOT an evidence of the Big Bang Theory? A. most objects in space are moving away from one another
    14·1 answer
  • Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this? A. combustion B. decomp
    14·2 answers
  • It has been suggested that rotating cylinders about 9 mi long and 5.9 mi in diameter be placed in space and used as colonies. Wh
    7·1 answer
  • "A trooper is moving due south along the freeway at a speed of 28 m/s. At time t = 0, a red car passes the trooper. The red car
    8·1 answer
  • The FIRST step in cloud formation is.... A) warmed air cools and condenses. B) solar energy causes warm air to rise. C) solar en
    15·1 answer
  • A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave? Group of answer choices
    10·1 answer
  • How does an executive order differ from a statue?
    7·1 answer
  • There would be no water supply tomorrow at home. How much water should be stored for tomorrow? Why do you emphasize on estimatio
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!