A solid piece of lead has a mass of 32.00 g and a volume of 2.84 cm^3. From these data, calculate the density of lead in SI units (kilograms per cubic meter).

11267.61 Kg/m³.

Explanation:

From the question given above, the following data were obtained:

Mass of lead = 32 g

Volume of lead = 2.84 cm³

Density of lead =.?

Next, we shall convert 32 g to Kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

32 g = 32 g × 1 Kg / 1000 g

32 g = 0.032 Kg

Next, we shall convert 2.84 cm³ to m³. This can be obtained as follow:

1 cm³ = 10¯⁶ m³

Therefore,

2.84 cm³ = 2.84 cm³ × 10¯⁶ m³ / 1 cm³

2.84 cm³ = 2.84×10¯⁶ m³

Finally, we shall determine the density of the piece of lead. This can be obtained as follow:

Mass of lead = 0.032 Kg

Volume of lead = 2.84×10¯⁶ m³

Density of lead =.?

Density = mass / volume

Density of lead = 0.032 / 2.84×10¯⁶

Density of lead = 11267.61 Kg/m³

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

c. 75.7

i think that is the right