Answer:
The north pole always points in the same direction in space. Sometimes, it is directed towards the sun and sometimes, away from the sun
Explanation:
The rotational tilt of the earth remains the same and as it rotates around its axis, it also simultaneously revolves around the sun. Due to this revolution, the different regions on earth receives different amount of sunlight at different times. This means that the sunlight that is incident on earth keeps on changing throughout the year.
The tilt of the earth sometimes is directed towards the sun and sometimes it is away from the sun, and this eventually results in the changes in the angle of the sun over years.
Answer:
D
Explanation:
Energy is never created nor destroyed.
<h2>
Spring constant is 14.72 N/m</h2>
Explanation:
We have for a spring
Force = Spring constant x Elongation
F = kx
Here force is weight of mass
F = W = mg = 0.54 x 9.81 = 5.3 N
Elongation, x = 36 cm = 0.36 m
Substituting
F = kx
5.3 = k x 0.36
k = 14.72 N/m
Spring constant is 14.72 N/m
The answer is “boiling point”
Answer:
The distance of the second dark band away from the central bright spot be located is 
Explanation:
Given that,
Wave length = 500 nm
Radius 
Distance from the hair sample D= 6 m
We need to calculate the distance of the second dark band away from the central bright spot be located
Using formula for dark fringe
Put the value into the formula
Hence, The distance of the second dark band away from the central bright spot be located is
