Physics, 05.02.2020 08:49 clariii59

Una persona a la que le gusta beber agua embotellada, toma diariamente una cantidad de 4.5l. calcula la cantidad de agua embotellada que bebe en un año, expresando el resultado en metros al cubo y el costo del agua bebida en ese tiempo, sabiendo que el precio de la botella de agua de 750 ml es de $2500.

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Answer from: emmaty7845

1. Cantidad de agua embotellada que bebe en un año.

$\boxed{1.6425m^3}$

Del enunciado tenemos lo siguiente:

Una persona toma 4.5L de agua por día.

Sabemos que un año tiene 365 días, por lo que dicha persona bebe anualmente:

4.5 x 365 = 1642.5L de agua anualmente

Sabemos que 1m³ equivale a 1000L, por lo que aplicando regla de tres:

$1642.5L(\frac{1m^3}{1000L})=\boxed{1.6425m^3}$

2. el costo del agua bebida en ese tiempo.

$\boxed{\$54475000}$

Del enunciado tenemos lo siguiente:

El precio de la botella de agua de 750 ml es de $2500.

De esta manera, bebió la siguiente cantidad de botellas:

$1642.5L(\frac{1botella}{0.75L})=2190 \ botellas$

Entonces, le costo de agua que bebió es:

$Costo=2190\times 2500=\boxed{\$54475000}$

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

the best answer for these questions would be:

1. c. is smaller

2. d) concrete operational

3. b) interaction with the environment – the children interact with their environment can them learn more.

4. a) parents who reason openly with children can limit a child’s cognitive ability.

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Una persona a la que le gusta beber agua embotellada, toma diariamente una cantidad de 4.5l. calcula...

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