Physics, 08.09.2020 01:01, lindseydupre

The vertical component of a velocity vector points up and has a magnitude of 20, ms'. The velocity vector Itself makes an angle of 25' with the horizontal. Find the magnitude of the velocity vector.

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answered: fri90

Kindly check explanation

Explanation:

Given the following :

Vertical component has Magnitude = 20m/s

Angle made with the horizontal (θ) = 25°

Vy = Vsinθ = 20sin25

Vy = 20 × 0.4226182 = 8.4523652 m/s

Horizontal component :

Vx = Vcosθ = 20 × cos25

Vx = 20 × 0.9063077 = 18.126155 m/s

Hence, magnitude :

V = sqrt(Vx² + Vy²)

V = sqrt(8.4523652² + 18.126155²)

V = sqrt (399.99999)

V = 20m/s

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.

answered: Guest

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4. click on the 1st option and scroll down and go at the bottom.

5. click on edit profile.

6. there appears a option 'prefernces' and at that option at the right side , 'edit' is written.

7. click on the edit option.

8. there is a option " i want to delete my account" and click on that.

hope this u

and ur welcm

: )

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The vertical component of a velocity vector points up and has a magnitude of 20, ms'. The velocity v...