An angry rhino with a mass of 2600 kg charges directly toward you with a speed of 3.70 m/s. before you start running, as a distraction, you throw a 0.180-kg rubber ball directly at the rhino with a speed of 8.39 m/s. determine the speed of the ball after it bounces back elastically toward you.
i think a is also correct
epi pens are used to stop the allergic reaction happening within a carriers body via injection of a chemical
the correct answer is a
volume of calcite (v) = 15 cm³,
mass of calcite (m) = 40.5 g,
density of calcite (ρ) = ?
density is defined as " it is the amount of matter of an object in a given volume". simply it is the ratio of matter in an object to its volume. the unit of density is kg/m³ in si system or g/cm³ in cgs system.
density ( ρ) = mass/volume
= m/v g/cm³
= 40.5 g/15 cm³
= 2.7 g/cm³
hence, the density of calcite is 2.7 g/cm³