Answer:
v= 0.2 m/s
Explanation:
Given that
m₁ = 50 kg
m₂ = 100 g = 0.1 kg
u =10 0 m/s
If there is no any external force on the system then the total linear momentum of the system will be conserve.
Initial linear momentum = Final momentum
m₁u₁ + m₂ u₂ =m₂ v₂ +m₁v₁
50 x 0 + 0.1 x 100 = 50 v + 0
0+ 10 = 50 v
v= 0.2 m/s
Therefore the recoil speed will be 0.2 m/s.
I think the answer would be : A. more powerful
The shorter the electromagnetic wave is, the closer it is to the electromagnetic core, which make it more powerful
hope this helps
<span>Ans : Bernoulli's principle states for incompressible non-viscous flow that
p/Ď + gâ™h + (1/2)â™v² = constant
Evaluate the equation along a stream line from liquid surface of the reservoir (1) to the inlet of the pipe
pâ‚/Ď + gâ™hâ‚ + (1/2)â™v₲ = pâ‚‚/Ď + gâ™hâ‚‚ + (1/2)â™v₂²
=>
vâ‚‚ = âš[ 2â™(pâ‚-pâ‚‚)/Ď + 2â™gâ™(hâ‚-hâ‚‚) + v₲ ]
lets make some assumptions:
- the pressure at the liquid surface is equal to the atmospheric pressure
pâ‚ = 1atm = 101325Pa
- the velocity of the liquid at the surface (that is the speed at which the liquid level in reservoir decreases) is quite small, so it may be ignored:
v₠≠0
So
vâ‚‚ = âš[ 2â™(pâ‚-pâ‚‚)/Ď + 2â™gâ™(hâ‚-hâ‚‚) ]
The height difference is fixed. So the only variable remaining is the pressure in the pipe. As higher it is as lower the velocity in the pipe is.
So you get the maximum velocity for the minimum pressure.
Since pressure cannot drop below zero this is
pâ‚‚ = 0
Therefore
vâ‚‚max = âš[ pâ‚/Ď + gâ™(hâ‚-hâ‚‚) ]
= âš[ 2â™101325Pa/1000kg/mÂł + 2â™9.81m/s²â™12m ]
= 20.93m/s</span>
Answer:
The international system of units otherwisely known as SI is widely used and accepted all over the globe while English system of measurement is only used by the British this limits their usage as it is applied in few part of the world which is Britain.
Both units are form of measurement being used for evaluating measurement
Explanation:
Newton's 2nd law of motion: (Honestly, if you don't
remember this by now, you're going to have problems.)
Force = (mass) x (acceleration).
= (60 kg) x (1.25 m/s²)
= 90 kg-m/s²
= 90 Newtons .
