Water in central texas comes from the edwards
aquifer and tends to be hard. which of the
following would you expect to find in this water?
o a. carbon dioxide
o b. calcium ions
o c. biotic factors
o d. oxygen gas

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?