Which index of refraction represents the least optically dense material?

a) 2.65
b) 1.77
c) 2.42
d) 1.58

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above