25. an object has the mass of 91g and a
volume of 7 ml. what is the density of
this object?

The density of object is 13 g/mL.

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

Volume= 7 mL

Mass= 91 g

Density of object = ?

Solution:

d= m/v

d = 91 g/ 7 mL

d = 13 g/mL

The density of object is 13 g/mL.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )