21. Which of the equations is balanced?

A) 2Li2O + H2O ⇒ 2LiOH

B) 3Fe + 3O2 ⇒ 2Fe2O3

C) 2N2 + O2 ⇒ 3N2O

D) 3Mg + N2 ⇒ Mg3N2

Identify the type of energy stored in a stretched bungee cord.?

A constant magnetic field passes through a single rectangular loop whose dimensions are 0.41 m x 0.65 m. The magnetic field has a magnitude of 1.8 T and is inclined at an angle of 78° with respect to the normal to the plane of the loop.

In which two locations do tropical cyclones occur?

If you push a cement brick and an ice block across a table with the same strength, which will travel further? Why? Explain which one would slide further.

The sampling rate of an ADC is 8.1 kHz. What will be an appropriate cut-off frequency (break frequency) for the anti-aliasing filter in front of the ADC

If there are many forces acting on an object, how can the net force be 0:

What is a planetary nebula? a. leftover gas from a supernova explosion b. the ejected envelope of a giant star surrounding the remnant of a star c. a type of young, medium-mass star d. a planet surrounded by a glowing shell of gas e.

A train is moving 4.82 m/s when it begins to accelerate. After 24.8s it is moving 7.09m/s how far did it move in that time

List three different emotions?

The jet stream flows from east to west across the United States. True False