The mattress of a water bed is 2.00 m long by 2.00 m wide and 30.0 cm deep. Find the weight of the water in the mattress. Knowing that the density of water rho = 1000 kg/m3, find the pressure exerted by the water on the floor when the water bed rests in its normal position. Assume the entire lower surface of the bed makes contact with the floor.

2943 Pa

Explanation:

= Density of water =

g = Acceleration due to gravity =

V = Volume

A = Area

Mass of the blanket

Force on the ground applied due to its own weight

Pressure is given by

The pressure exerted by the water on the floor  is 2943 Pa

the device is called “ rocket engine”

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .