which of the following is true? a) speed is velocity w a vector b) speed is a scalar w direction c) speed is velocity w direction d) velocity is speed w a direction

The irreversible thermite reaction (Fe2O3 + 2 Al - -> 2 Fe + Al2O3) is highly exothermic, changing the temperature by over 1000 of degrees.

After singing for a few minutes the soloist rejoins the choir a second choir, consist of 90 additional singers then joins in each group of 10 singers sings with the same intensity as the first 10 person choir now how many decibels of sound intensity

To start a warm fuel injection engine, a. press the accelerator to the floor once and release it. b. press the accelerator lightly and hold it. c. press the accelerator repeatedly. d. leave the accelerator alone.

If displacement is not changing as a function of time then what is velocity

How can we describe an atom

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.