First of all, we need to convert the angular speed from rev/min into rev/s:

The angular acceleration is the variation of angular speed divided by the time:

And this is constant, so we can use the following equation to calculate the angle through which the engine has rotated:

so, 5 revolutions.
The term used to describe the quantity of matter that a body possesses is mass.
Answer:
An acid is a compound that increases hydrogen ions (H+) when it is dissolved in a solution.
all I got
It will sink because it is heavier. The density of water 1.00 g/ml
Answer:
Photons.
Explanation:
Einstein explained the photoelectric effect by proposing that light is transmitted, not in the form of continuous waves, but in the form of many tiny, discrete packets of energy called photons. Photons are massless and chargeless particle. The energy of a photon is given by :

f is the frequency of photon.