Answer:
Le pH de l’ammoniac est de 11.6
Explanation:
Answer:
The elastic potential energy is zero.
The net force acting on the spring is zero.
Explanation:
The equilibrium position of a spring is the position that the spring has when its neither compressed nor stretched - it is also called natural length of the spring.
Let's now analyze the different statements:
The spring constant is zero. --> false. The spring constant is never zero.
The elastic potential energy is at a maximum --> false. The elastic potential energy of a spring is given by
where k is the spring constant and x the displacement. Therefore, the elastic potential energy is maximum when x, the displacement, is maximum.
The elastic potential energy is zero. --> true. As we saw from the equation above, the elastic potential energy is zero when the displacement is zero (at the equilibrium position).
The displacement of the spring is at a maxi
num --> false, for what we said above
The net force acting on the spring is zero. --> true, as the spring is neither compressed nor stretched
Answer: 1.58Ω
Explanation:
R1 = 5Ω
R2 = 15Ω
R3 = 3Ω
R4 = 30Ω
The equivalent resistance of the resistor connection (Rtotal) of the four resistors connected in parallel is obtained by adding the reciprocal of each resistance.
i.e 1/Rtotal = (1/R1 + 1/R2 + 1/R3 +1/R4)
1/Rtotal = (1/5Ω + 1/15Ω + 1/3Ω + 1/30Ω)
Make 30Ω the lowest common multiple
1/Rtotal = (6 + 2 + 10 + 1)/30Ω
1/Rtotal = 19/30Ω
To get the value of Rtotal, cross multiply
1 x 30Ω = Rtotal x 19
30Ω = Rtotal x 19
Rtotal = 30Ω/19
Rtotal = 1.58Ω
Thus, the equivalent resistance of this resistor connection is 1.58Ω