Answer: When there is an increased number of sun spots, it means the surface temperature is decreased which will decrease the temperature of the Earth's surface as well
Explanation:
Answer: The density is greater at point C
Explanation: At that point
The convention current slowly cools off
Answer:
2 L, L, 2 L/3
Explanation:
For a pipe of length l open at both ends, the length of the pipe is given by :

or

For first pitch tone, n = 1

For first pitch tone, n = 2


For first pitch tone, n = 3


So, the wavelengths of the three lowest-pitch tones produced by this pipe are 2 L, L, 2 L/3 respectively. Hence, the correct option is (d)
Because a star is a peace of the sun and the sun is hot so the star get it energy from the Sun .
C. ultraviolet rays & D. gamma rays