Question

PLEASE HELP I'VE BEEN ON THIS FOR A LONG TIME PLEASE HELP

Answer 1

Refer to the following illustration to answer Question 10.

The block in the illustration is floating in water. Water has a density of 1.0 g/cm3 and about 25 percent of the block is below water. What is a good estimate of the density of the block? (Points: 3)
0.25 g/cm3

0.50 g/cm3

0.75 g/cm3

1.00 g/cm3

Answer 2

.25 medal me to let me know if I am right

Answer 3

My best guess would be C....

Answer 4

The weight of the block is balanced by the buoyancy force.
Weight of the block = mg
Buoyancy force = weight of the displaced liquid = 1/4 * volume of block * density of water * g
Find m / V for the block.

Answer 5

okay

Answer 6

Instead of guessing try to solve the equation in my previous reply.

Answer 7

okay

Answer 8

oh it is 75 i think i *

Answer 9

\[
\text{Weight of the object = Buoyancy force} \\
M_{\text{object}} * g = \frac 14 * V_{\text{object}} * \rho _{\text{water}} * g \\
\frac{M_{\text{object}}}{V_{\text{object}}} = \frac{\rho _{\text{water}}}{4} = \frac 14 \\
\rho_{\text{object}} = \frac{M_{\text{object}}}{V_{\text{object}}} = \frac 14 = 0.25~gm/cm^3
\]

Answer 10

oh thanks 0.25