The cosmic microwave background<span> (CMB) is electromagnetic </span>radiation<span> as a remnant from an early stage of the universe in Big Bang cosmology. In older literature, the CMB is also variously known as </span>cosmic microwave background radiation<span> (CMBR) or "relic </span>radiation<span>"</span>
Answer:
I believe the answer is B.
Answer:
Explanation:
According to newton's law of gravitation , equal force of attraction are applied on two masses m₁ and m₂ placed at distance d . This force is given by the expression
F = G m₁ m₂ / d²
If one of the masses be earth with mass M then d = radius of earth R
Force F = G Mm₁ / R²
this force is applied on both the earth and mass m₁ in equal magnitude and in opposite direction.
In the formula F is proportional to m₁
among the given objects in the question , m₁ of object varies in the following order.
skyscraper > car > human being > basket ball
So Force F on the earth by them will also vary in the same order.
Answer:
Explanation:
Given data:
Mass of the man, 
Total mechanical energy, 
Height, 
Suppose there is no external force acting on the man. In this situation, the total mechanical energy (kinetic + potential) will remain steady.
Let the speed of the man at 2.6 m be <em>v</em>.
Thus,
