Answer Posted / sajad ahmad mir, department of

We all Know from the elementary classes that Gravitational
Force is given as:
F=G m_1 m_2/x^2
Where m1 and m2 are masses of two bodies attracting each
other with force F. Also, G is Universal Gravitational
constant and x is the separation between two bodies.
If masses of bodies are doubled, let, m1 goes to 2m1 and m2
goes to 2m2. Also if distances between bodies is doubled,
let x=2x.
Now the gravitational force between two bodies is given as:
F^'=G (2m_1 2m_2)/(2x)^2 =(G4m_1 m_2)/(4x^2 )=G (m_1
m_2)/x^2 =F

From above two equations we come to know that when the
masses of two attracting bodies are doubled and at the same
time the separation between them is also doubled then the
gravitational force remain same or invariant.

For what the parabolic dishes are used?

1014

---

What is master oscillator?

1070

---

What sound waves travel from air to water the frequency remains?

1085

---

Why is it important not to expose a patient to x-rays for too long?

1035

---

How is radiation emitted from the body?

1040

---

Explain what is meant by 4th dimension?

999

---

How spectral lines show discrete energy levels in an atom. : quantum physics

930

---

How is sound produced?

1007

---

what is momentum?

1096

---

What secondary color of light is produced by mixing the primary colors of red and blue?

1128

---

Is their any rule in significant figures that maximum number of significant figures in a number are 5

2063

---

Explain what is larger the force the earth exerts on you or the force you exert on the earth?

1021

---

When a green colored object is illuminated by a green light it will appear as what color to the human eye?

990

---

How do you find the refractive index of a liquid by using total internal reflection?

939

---

When sound waves travel from air to water, what happens to its frequency?

1041

---