Which of the following years had the least sunspot activity?

A) 1930
B) 1949
C) 1961
D) 1987

D) 1987

Physics & Space Science

You might also like to view...

Answer the following statement(s) true (T) or false (F)

1. A linear traveling wave can be partially reflected when it encounters another linear traveling wave. 2. The reflection will be total

View
Physics & Space Science

The order of evolutionary stages of a star like the Sun would be Main Sequence, giant, planetary nebula, and finally a ________

Fill in the blank(s) with correct word

View
Physics & Space Science

Choose the lens having the shortest focal length

a.

b.

View
Physics & Space Science

Flowing surface water alters the landscape in what ways?

A) erosion B) deposition of sediments C) weathering D) It weathers and erodes sediments, and then it deposits sediment.

View
Physics & Space Science