Physics, 30.07.2019 03:30 emmi14

Awooden block has a mass of 562 g and a volume of 72 cm3. what is the density? 15 points !

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Answer from: anzhaiha7

Density of the wooden block is $7805.5\ kg/m^3$

Explanation:

It is given that,

Mass of the wooden block, m = 562 g = 0.562 kg

Volume of the block, $V=72\ cm^3=7.2\times 10^{-5}\ m^3$

We need to find the density of the block. Mass per unit volume of an object is called its density. It is given by :

$d=\dfrac{m}{V}$

$d=\dfrac{0.562\ kg}{7.2\times 10^{-5}\ m^3}$

$d=7805.5\ kg/m^3$

So, the density of the wooden block is $7805.5\ kg/m^3$ . Hence, this is the required solution.

Answer from: lalaween098

Density of a Material

The density of a material is defined as the mass per unit volume

it formula is given as

Density = Mass/Volume

and the unit is g/cm^3

Explanation:

Given data

Mass = 562 g

Volume = 72 cm3

Hence the density is expressed as

Density = 562 /72

Density = 7.80 g/cm^3

therefore the density is 7.80 g/cm^3

for more information on density see the link below

link

Answer from: Quest

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

$_a^z\textrm{x}\rightarrow _{a-2}^{z-4}+_2^4\alpha$

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

$_a^z\textrm{x}+_{-1}^0\textrm{e}\rightarrow _{z-1}^a\textrm{y}$

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases $\gamma -radiations$ . this process does not change the mass number.

$_a^z\textrm{x}^*\rightarrow _a^z\textrm{x}+_0^0\gamma$

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as $\beta ^+$ -decay. in this the mass number remains same.

$_a^z\textrm{x}\rightarrow _{z-1}^a\textrm{y}+_{+1}^0e$

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

Answer from: Quest

what is the actual question though?

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Awooden block has a mass of 562 g and a volume of 72 cm3. what is the density? 15 points !...