Answer:
Explanation:
V = Volume of air =
P = Power = 10 W
t = Time = 1 hour
m = Mass of air = 2 kg
Specific volume is given by
The specific volume at the final state is
Work done is given by
The energy transfer by work, is
Change in specific internal energy is given by
The change in specific internal energy of the air is
Answer: Magnitude of electric field =p × Ke × Q/d^3
Explanation: Using Coulombs law of point charge,each charge on the circle would exert a fieldEc at point given by:
Ec= Ke × (Q/n)/d^2
Where Ke= Coulomb's constant
d= distance between the charges and the point of measurement, P with d^2=a^2+p^2
(Q/n)= Magnitude of the charge.
For charges in a circle,all the force components and direction(x,z) are cancelled by the symmetry,leaving only the vertical force(y-direction)
The Resultant vector will be
Ecy=Eq × sin(theta)
Ecy=Ke × (Q/n)/d^2 ×(p/d)
Adding the forces from all the charges,the magnitude of electric field Ey=n×Ecy
/Ey/= n ×[Ke ×(Q/n)/d^2 ×(p/d)]
/Ey/= p × Ke × (Q/d^3)
Answer:
area is 0.245 m²
Explanation:
The equation for pressure is
P = F / A
Where P is the pressure, F the force and A the area where the force is applied.
With the data we can calculate the pressure applied by the feet on the human on the floor
P1 = W / A = mg / A
P1 = 75 9.8 / 0.05
P1 = 14700 Pa
Now they tell us that the maxi maque pressure supports the snow is 3 kPa = 3000 Pa, the way to decrease the pressure is to increase the area on which force is applied.
P2 = F / A2
In this case we will calculate the minimum area, so we use the maximum pressure that supports the snow (P2 = 3000 Pa) and the force remains the weight of man
A2 = F / P2
A2= mg / P2
A2 = 75 9.8 / 3000
A2 = 0.245 m²
Answer:
In essence, optical lenses bend and focus light, known as refraction. Prism lenses, however, refract light a bit differently. ... Light passing through a prism will bend towards the base, while the image of the object viewed with the prism moves toward the peak.
Explanation:
Using the kinematic equation:
Vf=Vi+at then plug the values in.
Vi=0 m/s (Because the ball is dropped)
t=3 s.
a=9.81 m/s=g
Vf=0+3*9.81;
Vf=29.43 m/s