Iwill give you 50 points
what is the density of a book whose mass is 1,800 g and whose volume is 300 cm2

what is the mass of a ball whose density is 0.250 g/cm3 and whose is 200 cm3

Answer : The density of book is

The mass of a ball is, 50 grams.

Explanation :

Part 1 :

Density : It is defined as the mass contained per unit volume.

Formula used :

Given :

Mass = 1800 g

Volume =

Now put all the given values in the above formula, we get :

Therefore, the density of book is

Part 2 :

Formula used :

Given :

Volume =

Density =

Now put all the given values in the above formula, we get :

Therefore, the mass of a ball is 50 grams.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.