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
Vedmedyk [2.9K]
3 years ago
7

At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.855 m/s2 if the acceleration du

e to gravity at the surface has magnitude 9.80m/s2?
Physics
1 answer:
natulia [17]3 years ago
5 0
Given: Normal pull of gravity g = 9.8 m/s²; 

 g = 0.855 m/s²  (at a certain distance)

Universal gravitational constant G = 6.67 x 10⁻¹¹ N.m²/Kg²

Mass of the Earth Me = 5.98 x 10²⁴ Kg

Radius r = ?

g = GMe/r²

r = √GMe/g

r = √(6.67 x 10⁻¹¹ N.m²/Kg²)(5.98 x 10²⁴ Kg)/(0.855 m/s²)

r = 2.16 x 10⁷ m or 

r =  21,610 Km





.
You might be interested in
One advantage of the __________ model is quick recognition. A. prototype B. exemplar C. language D. concept Please select the be
Vika [28.1K]

Answer:

A. Prototype

Explanation:

i just took the test

3 0
2 years ago
Which type of cloud would you expect to be involved in some form of precipitation?
fomenos
Stratus clouds maybe
6 0
3 years ago
When the distance between two charges is halved, the electrical force between them?
Llana [10]
If the distance between two charges is halved, the electrical force between them increases by a factor 4.

In fact, the magnitude of the electric force between two charges is given by:
F= k \frac{q_1 q_2}{r^2}
where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the two charges

We see that the magnitude of the force F is inversely proportional to the square of the distance r. Therefore, if the radius is halved:
r'= \frac{r}{2}
the magnitude of the force changes as follows:
F'=k \frac{q_1 q_2}{r'^2}=k \frac{q_1 q_2}{( \frac{r}{2})^2 }=k \frac{q_1 q_2}{ \frac{r^2}{4} } =4k  \frac{q_1 q_2}{r^2}=4 F
so, the force increases by a factor 4.
3 0
3 years ago
Which statement best describes the importance of joints in the roadways of Bridges ?
Sergeeva-Olga [200]

Answer:

c. Joints allow the roadway to expand and contract as cars put force on the bridge

Explanation:

The reasons why joints are allowed on roadway is to accommodate the contraction and expansion of the road as cars put force on them.

  • Most materials used in making roadways are susceptible to expansion and contraction.
  • When a measure of force is applied their length either increases or decreases depending on the type of force.
  • To accommodate these changes, joints are placed in roadways
3 0
3 years ago
Does the tension of a string affect the speed of a wave
Nata [24]
Yes , increased tension suggests increased molecular attraction between the molecules of the ropes which affect the increase in the speed of wave.
5 0
3 years ago
Other questions:
  • What is the magnitude of the electric field at a distance 60 cm from the center of the sphere? The radius of the sphere 30 cm, t
    10·2 answers
  • A vector A has components Ax = −4.00 m and Ay = 3.50 m. Find the magnitude (in m) and the direction (in degrees counterclockwise
    6·1 answer
  • an object of mass 1kg was at rest before it fell through a height o 5m and hit the ground. Calculate the initial gravitational p
    7·2 answers
  • A frictionless, massless pulley is attached to the ceiling, in a gravity field of 9.81 m/s2. Mass M2 is greater than mass m1. Th
    13·1 answer
  • "an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done i
    15·1 answer
  • Hey what is Krichoff rule<br>good morning​
    13·2 answers
  • How much momentum does Elena's 1200kg car have if it is traveling with a velocity of 15 m/s N?
    5·1 answer
  • A ball is dropped from a height of 10m. At the same time, another ball is thrown
    9·1 answer
  • What is the role of enzymes in the digestion of food
    13·2 answers
  • Which statement about bout waves is correct?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!