When the total amount of a quantity is the same before and after some event occurs, we say that the quantity is (blank)

What happens when energy is added to a sample of ice at 0◦c?

Real gases do not exist. a. True b. False

Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead? What are the limitations of sending information using electromagnetic waves?

Atoms form chemical bonds using: A. Electrons in the innermost energy level B. electrons in the outermost energy levels D. Protons and electrons

Draw a simple atom (label protons, neutrons and electrons)

The sum of potential and kinetic energies in the particles of a substance is called energy. True or False

Element X has a mass number of 40 and an atomic number of 20, and element Y has a mass number of 56 and an atomic number of 26. Element X has more neutrons and fewer electrons than element Y. more neutrons and electrons than element Y.

How does mass affect average speed?

Object A attracts object B with a gravitational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the changed force of attraction between them? A. 2.5 newtons B. 5 newtons C. 20 newtons D.

A small particle starts from rest from the origin of an xy-coordinate system and travels in the xy-plane. Its acceleration in the x-direction is 2.0 m/s2, and its acceleration in the y-direction is 1.0 m/s2.