Which of the following describes subatomic particles?
carbon and nitrogen
solids, liquids, gases
larger than atoms
protons, neutrons, and electrons
vaporization takes place when a solid is changed to a gas.
true
false

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

What is the frequency if a wave that pases a given pount 22 times in 2 seconds