How do reflection and refraction of waves affect communication?

If the mass of a material is 41 grams and the volume of the material is 5 cm^3, what would the density of the material be? answer: Units:

What happens to the light as it changes media from air to glass?

a thundercloud whose base is 500m above the ground. The potential difference between the base of the cloud and the m ground is 200MV. A raindrop with a charge of 4.0 x 10-12C is in the region between the cloud and the ground.

A 82.2 kg ice skater, moving at 9.1 m/s, crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 4.55 m/s. Suppose the average force a skater can experience without breaking a bone is 4472 N.

How does the food coloring behave?

Why does icing sugar dissolve more rapidly than granular sugar?

At t = 0 the components of a radio-controlled car's velocity are vx = 0.5 m/s and vy = 1.2 m/s. Find the components of the car's velocity at t = 4.

2) A window washer pulls themselves upward using a bucket pulley apparatus. A) How hard must pull downward to raise herself slowly at a constant speed? B) If she increases this force by 15%, what will her acceleration be?

A star with an original mass of 8 to 25 solar masses will ultimately become a? a) red giant b) white dwarf c) neutron star d) main sequence star

Racewalking involves more impact than running. true false