A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. What is the density of a 344-g rock that displaces 216 cm3 of water

density d = 1.59 g/cm^3

The density of the rock is 1.59 g/cm^3

Explanation:

The density of an object can be derived by measuring its mass and then measuring its volume by submerging it in a graduated cylinder.

Density = mass/volume of water displaced

d = m/v 1

Given;

mass m = 344 g

Volume of water displaced v = 216 cm^3

from equation 1, we can calculate the value of the density;

Substituting the given values;

d = 344/216 g/cm^3

d = 1.592592592592 g/cm^3

d = 1.59 g/cm^3

The density of the rock is 1.59 g/cm^3

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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the independent variable, or the one that is intentionally manipulated is the speed.