An optical fiber is made of clear plastic (n = 1.50). Light travels through the fiber at angles ranging from 40° to 55°. What is the measurement of the critical angle of this fiber?

1 What properties of a star are needed to calculate the star's luminosity? A. Size and apparent brightness B. mass and distance to the star. C. temperature and diameter of the star D. apparent brightness and distance to the star. 2.

Which example has only potential energy and no kinetic energy? Select one: a. a roller coaster zooming down a hill b. a child riding their bike c. a bird flying from a tree d. a ball sitting on a shelf

With enough time, would an ice pop melt on a cool autumn day? Explain.

How many atoms are in NaHCO3

Which element comes first in a chemical formula? Question 10 options: Those with positive oxidation numbers. Those with negative oxidation numbers. The first element is always a metal. The first element is always a nonmetal.

Which solution has the greatest number of hydroxide ions? baking soda, pH = 9 milk, pH = 6 tomato juice, pH = 3.5 vinegar, pH = 2A substance is boiled repeatedly and stirred, but the solute never mixes with the solvent.

Part of the suns energy that reaches the Earths surface is absorbed by land and water as heat. The earths surface then releases heat back into the atmosphere Which of the following is true about this solar energy that is absorbed and released by

When Emeka was first training his dog, Smooches, to heel he would give Smooches a treat when she stayed close during walks. Now Smooches stays right by Emeka's side, even when she is not on her leash. In this case, a.

What must vectors have in common in order to be added?

After one species disappears the other species in the ecosystem ...