The magnetic fields in sunspots can be detected by the fact that some lines in the spectrum of a gas split into two or more lines by the action of magnetic fields.

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


True

Physics & Space Science

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What is the index of refraction inside a certain transparent material if the critical angle is found to be 48.° (air is outside)?

A) 1.49 B) 1.48 C) 1.35 D) 0.743 E) 1.22

Physics & Space Science

Which statement about our current knowledge of elements is FALSE?

A) We now know of more than 110 elements, both natural and man-made. B) 81 stable elements have been found on Earth. C) 10 radioactive elements are also found on Earth. D) We have now produced over 50 radioactive elements not occurring in nature. E) Technetium is found in giant stars, but not yet in nature on the Earth.

Physics & Space Science

Velma is in a train headed north past Mort at 30 m/s. Velma has a slingshot that can shoot pebbles at 40 m/s. Velma shoots a pebble toward the rear of the train. Velma observes the pebble's velocity to be

A) 10 m/s south. B) 10 m/s north. C) 40 m/s south. D) 70 m/s south. E) 70 m/s north.

Physics & Space Science

If the maximum E-component of an electromagnetic wave is 600 V/m, what is the maximum B-component?

a. 1.4 T b. 1.8 × 10^?5 T c. 2.0 × 10^?6 T d. 1.0 × 10^?3 T e. 1.6 × 10^?10 T

Physics & Space Science