« previous next »

Author Question: What is the law of universal gravitation? Why is gravitational attraction not the same everywhere on ... (Read 67 times)

debasdf

  • Hero Member
  • *****
  • Posts: 570
on: Jul 15, 2018

What is the law of universal gravitation? Why is gravitational attraction not the same everywhere on
  the surface of Earth? What will be an ideal response?



Question 2

Why does continental crust stand higher than oceanic crust? What will be an ideal response?


xiazhe

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 15, 2018
Answer to Question 1

Isaac Newton said that the force of gravity (F) between two masses (m1 and m2) is directly
proportional to their masses and inversely proportional to the square of the distance between their
centers of mass. This means that an attractive force exists between any two objects and the magnitude
of that force varies, depending on the masses of the objects and the distance between their centers.
Gravitational attraction would be the same everywhere on Earth's surface if the planet were perfectly
spherical, homogeneous throughout, and not rotating. But none of these things is true.



Answer to Question 2

Continental crust is granitic with an overall density of 2.7 g/cm3, and oceanic crust is made of basalt
and gabbro with a density for 3.0 g/cm3. Continental crust is around 35 km thick, and in mountain
ranges, it's much thicker. Oceanic crust is only 5 to 10 km thick.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Laser Interferometer Gravitational Wave Observatory (LIGO) Laser Interferometer Gravitational Wave Observatory (LIGO)
Gravitational Lensing of Extremely Distant Galaxies Gravitational Lensing of Extremely Distant Galaxies
Gravitational Lensing of Quasars Gravitational Lensing of Quasars
Primary School Attendance in World Regions Attending primary school is common but not universal, wo Primary School Attendance in World Regions Attending primary school is common but not universal, wo
Converting the universal gas constant Converting the universal gas constant
Newton’s Law of Universal Gravitation Newton’s Law of Universal Gravitation
Video: Interview with an Anorexic Woman (Part 2 of 2)

For a complete list of videos, visit our video library