PHYSICS HIGH SCHOOL

If a 78.2 kg kangaroo weighs 6742 N on the planet katar, calculate katar's radius

Answers

Answer 1
Answer:

Answer:

  about 7500 km

Explanation:

The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...

  F = GmM/r^2

Solving for r, we have ...

  r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)

This is in meters, so the radius in km is about ...

  r ≈ 7500 km

Related Questions

In ultrasound physics, which of the following is improved by increasing packet size ?
Dua buah vektor, yaitu P= 6i-5j+2k dan Q = 2i+2j+8k. Tentukan vektor R agar P-Q+R=0. Hitung pula besar vektor R?
explain why the motion of a body which is moving with constant speed in a circular path is said to be accelerated ?
Work is being done in which of these situations? all motions are at a constant velocity
A certain percentage of body fat is essential for the body to function effectively.

An unknown fiber sample is found at a crime scene. Forensic scientists measure its index of refraction and obtain a value of 1.48. A suspect's jacket was made of Dacron polyester, his jeans were made of cotton, his shirt was made of rayon, and his tie was made of acetate. Which piece of clothing may match the fiber at the crime scene?Question 12 options:

tie

shirt

jeans

jacket

Answers

The closest refractive index to the one observed is that of rayon, about 1.51. Therefore, the fiber is likely from the suspect's shirt. 

Answer:

shirt

Explanation:

shirt

Which of the following absorbs the MOST heat energy?a. red objects
b. white objects
c. black objects
d. purple object

Answers

darker is warmer C. Black objects.
Black objects because light waves are attracted to darker objects.

Help fast please!!!!!A new solar system with two planets of equal mass - Planet X and Planet Y - is discovered. Planet X is closest to the sun.

What is the sun's gravitational pull on Planet Y as compared with Planet X?

A.
Because Planet Y is farther from the sun, the sun's gravitational pull on Planet Y is less than the sun's gravitational pull on Planet X.
B.
The sun's gravity repels Planet Y with more force than it repels Planet X, which is why Planet Y is farther away.
C.
Because Planet Y is farther from the sun, the sun's gravitational pull on Planet Y is more than the sun's gravitational pull on Planet X.
D.
The sun's gravitational pull on Planet Y is equal to its gravitational pull on Planet X because distance does not affect the sun's gravity.

Answers


We're told that the planets have EQUAL MASS.

If that's true, then the strength of the gravitational forces between
each planet and the star depends only on the distance between
them ... the farther a planet is from the star, the smaller the
gravitational forces are IF we're talking about planets with
equal masses.

Planet-X is closer to the star, and Planet-Y is farther from it. 
From this we know that the gravitational forces between the
star and Planet-X are greater, and the forces between the star
and Planet-Y are smaller.

'A' says this.

'B' is totally absurd, because it talks about gravity repelling things.

'C' says exactly the opposite for the two planets.

'D' says that distance doesn't matter.  We know this is absurd,
simply because we're never pulled toward Jupiter in our daily life.

Answer:

the answer is A

Hope tis helps:)

Explanation:

When using a moveable pulley to lift an object, _______ of the object's weight is supported by the section of rope attached to the ceiling. This is why a moveable pulley requires _______ effort force than a fixed pulley to lift an object. A. half, less B. all, less C. half, more D. all, more

Answers

Answer:

UGHH IT WAS HALF AND LESS OMG :(

Explanation:

A crane lifts 400 N crate full of baked beans 15m how much work is done by the crane ?

Answers

Lookattheattachedpicture

Hope itwillbehelpfultoyou..

What is a geologist’s role in the petroleum industry? stay with the drillers to examine rock and fossils brought to the surface chart information on a well log calculate the distance and direction of movement of the lost vein of ore locate environments in which petroleum forms

Answers

Answer:what is the role of of geologist in the petroleum industry

A. Stay with the drillers to examine rocks and fossils brought to the surface.

B. Chart information on a well log

C. Calculate the distance and direction of movement of the lost vein of ore

D. locate environment in which the petroleum forms

Correct option. Is D locate environment in which petroleum forms

Explanation:

Petroleum geologists are usually linked to the actual discovery of oil and the identification of possible oil deposits or leads. It can be a very labor-intensive task involving several different fields of science and elaborate equipment. Petroleum

geologists look at the structural and

sedimentary aspects of the stratum/strata to identify possible oil traps

Answer: D locate environment in which the petroleum forms

Explanation:
Other Questions
Explain how the atoms of the element helium are formed in a star Please
The velocity of a wave isa. its direction and speed. b. the distance between two wave crests. c. the time required for a wave to move one wavelength. d. half the vertical distance between a crest and a trough divided by the frequency.
A force of 450 N accelerates a box across a frictionless surface at a rate of 15 m/s2. What is the mass of the box? 30 N 30 kg 6,750 N 6,750 kg
Three balls leave the edge of a table at the same time. Ball A rolls off the table with an initial horizontal velocity. Ball B is launched at an angle and has both an initial horizontal and vertical velocity. Ball C is dropped from rest, and has no initial velocity.a) Explain which one(s) hit the ground first. b) Explain which one(s) hit the ground last