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
trapecia [35]
2 years ago
12

The planet Gallifrey has 2 times the gravitational field strength and 2 times the radius of the Earth.

Physics
1 answer:
Alexeev081 [22]2 years ago
4 0

The mass of the planet Gallifrey is 8 times the mass of the Earth.

  • let the gravitational field of Earth = g
  • let the radius of the Earth = R
  • gravitational field of Gallifrey = 2g
  • radius of Gallifrey = 2R

<h3>What is gravitational potential energy?</h3>
  • This is the work done in moving an object to a certain distance against gravitational field.

The gravitational field strength of the Earth is given as follows;

g = \frac{GM}{r^2} \\\\G = \frac{gr^2}{M}

The gravitational field strength of the Planet Gallifrey is calculated as follows;

g_2 = \frac{GM_2}{r_2^2}

G = \frac{g_2r_2^2}{M_2} \\\\\frac{g_2r_2^2}{M_2} = \frac{gr^2}{M}\\\\M_2gr^2 = Mg_2r_2^2\\\\M_2 = \frac{Mg_2r_2^2}{gr^2} \\\\M_2 = \frac{M \times 2g \times (2r)^2}{gr^2} \\\\M_2 = \frac{M \times 2g \times 4r^2}{gr^2} \\\\M_2 = 8M

Thus, the mass of the planet Gallifrey is 8 times the mass of the Earth.

Learn more about gravitational field strength here:  brainly.com/question/14080810

You might be interested in
GIVING BRAINLIEST PLEASE HELP!!
Marrrta [24]
The answer is D hope it helps
8 0
3 years ago
Which is NOT a property of magnetic field lines?
salantis [7]
The answer would be B. Magnetic fields are invisible they cannot be directly observed
4 0
3 years ago
Read 2 more answers
If 478 watts of power are used in 14 seconds,how much work was done
zepelin [54]

Answer:

6692J

Explanation:

Power is defined as the rate at which work is being done.

So,

    Power  = \frac{workdone}{time }  

  Work done  = Power x time

Given parameters:

Power  = 478watts

Time  = 14s

So;

 Work done  = 478 x 14  = 6692J

6 0
3 years ago
A force that is doing work on a ball when that ball is falling through the air.
Ronch [10]

Answer:

i think the answer is gravity

3 0
2 years ago
A skateboarder flies horizontally off a cement planter. After 3 seconds the skateboarder lands on the ground with a final veloci
evablogger [386]

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

v = v_o + a \Delta t

A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.

v = v_o + a \Delta t\\\\v_o = v - a \Delta t = (-4.5 m/s) - (-9.8 m/s^{2} ) \times 3 s = 24.9 m/s

Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:

v = v_o + a \Delta t

Learn more: brainly.com/question/4434106

3 0
3 years ago
Other questions:
  • How do brakes change physical forces
    8·1 answer
  • A powerboat, starting from rest maintains a constant acceleration. After a certain time Δt, its displacement and velocity are Δr
    12·1 answer
  • Express each of the following in ms -1 <br>a) 18kmh-1<br>​
    14·1 answer
  • A postman needs to deliver a parcel to Peter's house 5
    11·1 answer
  • PLEASE HELP ME
    8·2 answers
  • Problem solving strategy
    13·1 answer
  • Define A Gamma Ray .....---_---__☘️​
    9·1 answer
  • The earth's gravity is pulling on you. Are you pulling on the earth? Explain why or why not.
    8·1 answer
  • Define limitations in an experiment
    11·1 answer
  • If a source of waves produces 30 waves per second, what is the frequency in hertz?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!