Question 6 of 10 Which two options describe physical properties of matter?
A. How easily a substance reacts with other substances
B. Whether a substance is acidic or basic
C. The color of the light that is reflected off a substance's surface
D. Whether a substance forms a patina
E. The amount of mass per unit volume
HELP ASAP HURRY !

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "