Answer:
Explanation:
According to Newton's law of Gravitation, the force exerted between two bodies of masses
and
and separated by a distance
is equal to the product of their masses and inversely proportional to the square of the distance:
(1)
Where:
is the Gravitational Constant and its value is
is the mass of the Sun
is the mass of the Earth
is the distance between the Sun and the Earth
Substituting the values in (1):
(2)
Finally:
This is the gravitational force acting on the earth due to the sun
The magnitude of the gravitational force : <u>3.48.10²² N</u>
<h3>Further explanation </h3>Gravity is a force that arises because of the attraction between objects with mass.
The magnitude of this attraction is proportional to the mass of the object.
The greater the mass of the object, the greater the gravitational force
Relationships can both be stated in
Newton's Gravity Law:
with F = gravitational force,
G = gravitational constant,
m1, m2 = mass of object,
r = distance between two objects.
From the available data:
m earth = 5.98.10²⁴ kg
m sun = 1.99.10³⁰ kg
r = 150 million km = 15.10⁷ km = 15.10¹⁰ m
G = 6.67.10⁻¹¹N.m² / kg²
We put in the formula:
So <em>The earth exerts 3.48.10²² N of force on the sun, exactly the same amount of force the sun exerts on the earth</em>
<h3>Learn more </h3>Isaac Newton's investigations of gravity
Gravitational force
increase the gravitational force between two objects
Keywords: gravitational force, Newton's Gravity Law, mass, sun,earth
Answer:
Double the current
Explanation:
The energy delivered by the heater is related to the current by the following relation:
E=
let R * t = k ( ∴ R and t both are constant)
so E= k
Now let:
E2= k I₂^2
E2= 4E
⇒ k I₂^2= 4* k
Cancel same terms on both sides.
I₂^2= 4*
taking square-root on both sides.
√I₂^2 = √4* I^2
⇒I₂= 2I
If we double the current the energy delivered each minute be 4E.