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2 years ago

Which statement is true of all matter?

Physics

1 answer:

Fittoniya [83]2 years ago

8 0

Answer:

D. It must have mass and volume

Explanation:

In science, matter is referred to as any substance that has weight and occupies space. This means that the substance must have a MASS of its own when weighed and also a VOLUME.

Matter include elements, molecules, humans, etc. In fact, almost every substance on Earth is considered MATTER. Therefore, the fact that a substance must "have mass and volume" is true for all matter.

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Surviving a ship wreck, what is the minimum mass of wood (density 60% that of sea water) necessary to support a 70kg woman stand

Shkiper50 [21]

To solve this problem we will apply the concepts related to the principle of archimedes. for which we will summarize that the bearing force must be equivalent to the mass of the individual and the mass of the way. Said mass of wood will be expressed in terms of density and volume. Finally with the values found we will proceed to find the Volume of the wood and thus find the mass.

$(M_{woman}+M_{wood})g=F_B$

$(M_{woman}+M_{wood})g=V\rho_{water} g$

$(M_{woman}+V \rho_{wood})g=V\rho_{water} g$

$(M_{woman}+V \rho_{wood})=V\rho_{water}$

For the relation between density and Volume we have that,

$mass=density\times volume$

Where given that,

Mass of woman, $M_{man}=70kg$

If the density of the wood is 60% the density of the water we will have to

Density of water, $\rho_{water}=1000kg/m^{3}$

And density of wood is

$\rho_{wood}=600kg/m^{3}$

Now the mass of the man can be expressed as

$M_{woman}=V\rho_{water} -V\rho_{wood}$

$V=\frac{M_{woman}}{\rho_{water} -\rho_{wood}}=\frac{70\;kg}{1000\;kg/m^{3}-600\;kg/m^{3}}$

$V=0.175m^{3}$

Mass of wood required is given by,

$M_{wood}=V\rho_{wood}=0.175m^{3}\times600kg/m^{3}$

$\mathbf{\therefore M_{wood}=105kg}$

Therefore the minimum mass necessary to support a 70kg Woman is 105Kg.

3 0

2 years ago

When do cells use oxygen to release energy

Dimas [21]

According to the theory, energy realized during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate). Cellular respiration is the process by which organism use oxygen to break down food molecule to get chemical energy for cell function

7 0

2 years ago

Which of the following statements about subatomic particles is FALSE? Which of the following statements about subatomic particle

kkurt [141]

Answer:

Protons have about the same mass as electrons is false

Explanation:

Electrons and protons have the same magnitude on charge but opposite sign

$e^{-}=-1.6\times10^{-19}C$ : charge of electron

$e^{+}=1.6\times10^{-19}C$ : charge of proton

Neutrons have no charge.

An atom is composed of protons and neutrons in the nucleus and electrons surrounding it, so a neutral atom has the same number of protons and electrons to has a net charge of zero. So, all the facts mentioned are true.

The false one is that protons have about the same mass as electrons, because the mass of an electron is $9.11\times10^{-31}kg$ and the mass of a proton is $1.67\times10^{-27}kg$ so the mass of a proton is a lot of bigger than electron mass.

8 0

2 years ago

What is meant by input and output work

N76 [4]

Answer:

the x and y values

Explanation:

because on the table the x is the input and y is the output

5 0

2 years ago

A 4 kg mass is in free fall. What is the velocity of the mass after 11 seconds

Ksju [112]

Velocity of the mass after 11 seconds = ( value of the gravitational acceleration) * ( time )
velocity = ( 9.81 m / s^2 ) ( 11)
velocity = 107.91 meters per second

5 0

2 years ago