Answer:
L₁ = W×L / w
Explanation:
The scenario is shown in the image below.
<u>At the pivot point, the torque acting on this point must be zero so that there will be easy back and forth without the heavier child.</u>
<u>Torque created by lighter child + Torque created by the heavier child = 0</u>
Thus,
According to the axis system, the heavier child is left to the pivot (origin), so,
W×(- L ) + w× L₁ = 0
So,
<u>L₁ = W×L / w</u>
A solid is the only state of matter that keeps it shape and volume when placed in different containments
Answer:
B = 0.07 mT
Explanation:
q = 1.6x10^-19 coulombs
for the electron to pass through the field undeflected the magnetic force acting on it must equal the electrical force due to the electric field
electric force = Eq = 16000 * 1.6x10^-19 newtons
magnetic force = qvB = 1.6x10^-19 * 2.7x10^8 * B
16000 * 1.6x10^-19 = 1.6x10^-19 * 2.7x10^8 * B
B = 0.07 mT (milli tesla)
Answer:
0.133 A
Explanation:
Given:
The voltage difference is, 
The resistance of the circuit is, 
Now, as per Ohm's Law, the potential difference across two points in a circuit is directly proportional to the current supplied in the circuit. The constant of proportionality is the resistance of the circuit.
Hence, the mathematical statement of Ohm's law is given as:
Where
is the current in the circuit.
Now, plug in 16 for 'V' and 120 for 'R' and solve for 'I'. This gives,

Therefore, the current in the circuit is 0.133 amperes.