Answer:
the last time i had my tempature taken was at disney prings about a week ago -_- they used one of those gun things that dont touch u and the SHOVED me forward so i guess i was fine
Explanation:
Answer:V₁=300ml
T₁=27°C
V₂=?
T₂= -3°C
as we know
V₁T₁=V₂T₂
By putting values in formula
300ml×27°C=V₂×(-3°C)
300ml×27°C/-3°C=V₂
8100ml/-3=V₂
-2700ml=V₂
or V₂= -2700ml
The trade winds are located about 30 degrees north and south of the equator.
Complete question:
The 100-kg homogeneous cylindrical disk is at rest when the force F =500N is applied to a cord wrapped around it, causing the disk to roll. Use the principle of work and energy to determine the angular velocity of the disk when it has turned one revolution (radius of the disk = 300mm).
Answer:
The angular velocity of the disk when it has turned one revolution is 16.712 rad/s
Explanation:
From the principle of work and energy;
U = E₂ - E₁, since the disk is initially at rest, T₁ = 0
U = E₂
Work done, U = product of force and perpendicular distance
U = F × d
As the cord winds, force act through the cord at a distance of 2d
U = F × 2d
Distance of one complete revolution = 2πR = 2π(0.3) = 0.6π
U = 500 × 2(0.6π) = 1885.2 J
Kinetic energy E₂ 
![E_2 = \frac{1}{2}[(\frac{1}{2}mR^2)\omega^2] + \frac{1}{2}m(\omega R)^2\\\\E_2 = \frac{1}{2}[(\frac{1}{2}*100*0.3^2)\omega^2] +\frac{1}{2}*100(\omega)^2*0.3^2\\\\E_2 = 2.25 \omega^2 +4.5 \omega^2\\\\E_2 = 6.75 \omega^2](https://tex.z-dn.net/?f=E_2%20%3D%20%5Cfrac%7B1%7D%7B2%7D%5B%28%5Cfrac%7B1%7D%7B2%7DmR%5E2%29%5Comega%5E2%5D%20%2B%20%5Cfrac%7B1%7D%7B2%7Dm%28%5Comega%20R%29%5E2%5C%5C%5C%5CE_2%20%3D%20%5Cfrac%7B1%7D%7B2%7D%5B%28%5Cfrac%7B1%7D%7B2%7D%2A100%2A0.3%5E2%29%5Comega%5E2%5D%20%2B%5Cfrac%7B1%7D%7B2%7D%2A100%28%5Comega%29%5E2%2A0.3%5E2%5C%5C%5C%5CE_2%20%3D%202.25%20%5Comega%5E2%20%2B4.5%20%5Comega%5E2%5C%5C%5C%5CE_2%20%3D%206.75%20%5Comega%5E2)
Recall that U = E₂
1885.2 = 6.75ω²
ω² = 1885.2/6.75
ω² = 279.2889
ω = √279.2889
ω = 16.712 rad/s
Therefore, the angular velocity of the disk when it has turned one revolution is 16.712 rad/s
Answer:
No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). ... That is why 100% efficiency in machines shall not be possible.