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mixer [17]
3 years ago
6

How can you reduce the percentage uncertainty in measurements that you make?​

Physics
1 answer:
julia-pushkina [17]3 years ago
8 0
You can make sure by measuring it more than once to make sure it is correct and make sure that you measure from the right points
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The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particl
Lyrx [107]

Answer:

a)    F = 21.16 N,  b)     a = 3.17 10²⁸ m / s

Explanation:

a) The outside between the alpha particles is the electric force, given by Coulomb's law

          F = k \frac{ q_1 q_2}{r^2}

in that case the two charges are of equal magnitude

          q₁ = q₂ = 2q

let's calculate

         F = 9 \ 10^9 \ \frac{ (2 \ 1.6 \ 10^{-19} )^2 }{ (6.60 \ 10^{-15} )^2 }

         F = 21.16 N

this force is repulsive because the charges are of the same sign

b) what is the initial acceleration

         F = ma

         a = F / m

         a = \frac{21.16}{4.0026 \ 1.67 \ 10^{-27} }21.16 / 4.0025 1.67 10-27

         a = 3.17 10²⁸ m / s

this acceleration is in the direction of moving away the alpha particles

7 0
3 years ago
A hockey puck moving at 28 m/s is caught by an 80,00 kg man who was at
zimovet [89]

Answer:

A

Explanation:

all the work is in the attached file :D

8 0
4 years ago
Is weather chart the same as aneroid barometer?​
kipiarov [429]
Kind of. A barometer measures air pressure. Not actual weather. Even though air pressure has a lot to do with the weather it is not exactly the same thing.
5 0
3 years ago
A body is at aheight of 81m and is ascending upwards with a velocity of 12m/s .a body of 2 kg weight is dropped from it.if g=10m
butalik [34]
First the velocity drops to zero in 1.2 secs. In those seconds it went upwards for 7.2 m, then it went from 87.2 to 0m. x-x0=v0*t+1/2*g*t^2 ergo t=sqrt(2x/g) that is 4.1761 s. Finally the total time required is 5.3761 s
7 0
3 years ago
Who expressed particles by wave equations?
ehidna [41]
I believe it was famous quantum physicist <span>Erwin Schrödinger
</span> 
7 0
3 years ago
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