What mass of a material with density Ï is required to make a hollow spherical shell having inner radius r1 and outer radius r2? (use any variable or symbol stated above as necessary.) ?

Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Based on this information, what is true about human skin color? Skin color is not a genetic trait.

If a car is moving at 30km/hr for 10 min, what is the distance that the car has traveled in meters

Technician A says that a 12-volt battery has six cells. Technician B says that the more plates a cell in a battery has, the more voltage it creates.

Time Warner Cable's leadership development program that spanned over 30 days and included weekly videos, practice exercises, and a two hour webinar was discussed in the Sed as an example of which of the following?

A man travles at an average velocity of 12 m/s for 4 seconds. what is the total distance travled by the man?

Molecules at room temperature move freely. What happens to the molecules when heat is removed until it freezes? Molecules group together Molecules slow down and contract Molecules speed up and expand Molecules move freely

A spring is used in a lab. It is vibrated at different frequencies and the wavelength is recorded. Using the graph of the data, what is the relationship found between frequency and wavelength? A) Frequency and wavelength are inversely related.

How do you describe the frequency of waves perceived by the observer from the moment the source appears to the moment it disappears?

What causes the stars to appear to move across the night sky?

Two waves collide and the temporary combined waves that results is smaller that the original wave. which term describes this interaction? A. destructive interference B. standing wave formation C. diffraction D. constructive interference