Physics, 06.10.2019 16:00, mahadsaeed101

The momentum of an object is determined to be 7.2 x 10-3 kg m/s. express this quantity as provider or use any equivalent unit.

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answered: pillgiing

$7.2*10^{-3} kg*\frac{m}{s}= 7.2 g* \frac{m}{s}$

Explanation:

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

Then

$x=\frac{c*b}{a}$

The direct rule of three is the rule applied in this case to perform the change of units.

The rule of three applies as follows: being 1 kg equivalent to 1000 g, then 7.2*10⁻³ kg m / s, how many grams will they be (keeping m / s without unit changes)?

$\frac{7.2*10^{-3} kg*\frac{m}{s} *1000 g}{1 kg}$

$7.2 g*\frac{m}{s}$

Then $7.2*10^{-3} kg*\frac{m}{s}= 7.2 g* \frac{m}{s}$

answered: Guest

Try b? sorry if i’m incorrect
An object is located 5.0 cm from a convex lens. the lens focuses light at a distance of 10.0 cm. wha

answered: Guest

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.

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The momentum of an object is determined to be 7.2 x 10-3 kg m/s. express this quantity as provider o...