Answer:
* the two plates of the same sign E = 0
* the two plates of different sign E/e = 2
Explanation:
In this exercise, the relationship between the field created by a plate and two infinite plates is asked.
The electric field created by each plate has the value of "e", which is related to the charge on the electric plate.
e =
If the plate is negative the electric field is directed towards the plate and if the plate is positive the electric field is directed out of the plate.
The test charge is always positive.
When we have two plates, we have several possibilities
* the two plates of the same sign
therefore the resulting electric field on the test charge is
E_total = e - e
E = 0
* the two plates of different sign
E_total = e + e
E = 2 e
the relationship between the two fields is
E/e = 2
Answer:
See the answers below.
Explanation:
Momentum is defined as the product of mass by velocity, in this way we have the following equation.
where:
P = momemtum [kg*m/s]
m = mass = 1500 [kg]
v = velocity = 6 [m/s]
Now we have to calculate the momentum of the plane when it travels at 30 [m/s].
Now this same momentum must be conserved, in such a way that the mass is increased but the velocity must decrease for the momentum to be conserved.
Find stress using the formula Stress = Force / Area. Here, force
exerted by 85kg person on stool is F = mg = 85kg * 9.8 m/s^2 = 833N. Find total
area of 3 legs A = 3 π (D/2)^2 = 3 π (2.5 x 10^-2 / 2)^2 = 1.4726 x 10^-3 m^2.
Now substitute in Stress = Force/Area. Stress = 833N / 1.4726 x 10^-3 m^2 =
5.656 x 10^5 N/m^2. Find strain using the formula strain = Stress / Young’s
modulus. For wood, Y = 1.3 x 10^10 N/m^2. Thus, strain = 5.656x10^5 N/m^2 /
1.3x10^10 N/m^2 = 4.35 x 10^-5 = 0.00435%.
Therefore, the legs decrease by 0.00435%
Ω = 2000 rpm, initial angular speed.
t = 30 s, the time for the wheel to come to rest.
Calculate the angular deceleration, α.
w - αt = 0
(209.4395 rad/s) - (α rad/s²)*(30 s) = 0
α = 6.9813 rad/s²
The angular distance traveled, θ, is given by
ω² - 2αθ = 0
θ = ω²/(2α)
= 209.4395²/(2*6.9813)
= 3141.6 rad
The number of revolutions is
3141.6/(2π) = 500
Answer: 500 revolutions
Answer:
yes, yes I can do that...