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My name is Ann [436]

3 years ago

15

Which statement best describes the role of plate tectonics in changes that occur on Earth?

1 answer:

k0ka [10]3 years ago

3 0

Answer:

the answer is A i learned this in class and i had the exact same question

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A child sits on top of a slide at the park. He pushes forward lightly, but does not go down the slide. Pick the sentence that

Vinvika [58]

Answer:

The net force on the child is zero

4 0

3 years ago

Can colloidal suspensions be separated out by filtration? yes no

Genrish500 [490]

Yes the particles are larger than 10,000 Angstroms which allow it to be separated by filtration

6 0

4 years ago

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What would be the advantage of using a net ionic equation to represent a redox reaction

wolverine [178]

The net ionic equation is shorter to use and already leaves out the electrons that transferred from the reducing agent to the oxidizing agent. Also, in some occasions the aqueous ions H+ and (or) OH- ions that help balance the net ionic charge are no longer shown in the net ionic equation.

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4 years ago

The block in this illustration is floating in water, which has a density of 1.00 g/cm3 .What is a good estimate of the density o

miss Akunina [59]

Answer : The density of the block is estimated to be, $0.30g/cm^3$ .

Explanation :

Density of the water, $\rho_w=1.0 g/cm^3$

As we know that,

Buoyant force = $\rho\times volume\times g$

where,

g = gravitational acceleration

volume of the block = v

density of the block = $\rho_o$

Weight of the Block = Buoyant force exerted by water

$\rho_o\times v\times g=\rho_w\times 30\%\text{ of volume of block}\times g$

$\rho_o\times v\times g=\rho_w\times 0.30v\times g$

$\rho_o\times v\times 9.8 m/s^2=1 g/cm^3\times 0.30v\times 9.8 m/s^2$

$\rho_o=0.30 g/cm^3$

Thus, the density of the block is estimated to be, $0.30g/cm^3$ .

6 0

3 years ago

Why Can alloys not be described using chemical formulas?

Reptile [31]

Alloys are homogeneous mixtures, they are not compounds like others and hence donot have formula

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4 years ago

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