Current can flow when the switch is closed
Answer:
Explanation:
Here h=36m, a=g=10m/s, u=0
Use s=ut+(1/2)at^2
36=0*t+(10t^2)/2
time=2.68 sec
As from the formula of final velovity, v=(2gh)^1/2
v=(2*10*36)^1/2
v=(720)^1/2
v=26.83………This is the final velocity
Answer:
A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.
Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.
Explanation:
Hope it helps
Answer:
- the iron + boat system displaces more volume than the iron alone
- the system is the iron alone, it displaces the same volume in the boat and the water
Explanation:
The Archimedes principle states that the thrust is equal to the weight of the dislodged liquid.
B = ρ g V
Let us analyze this case the weight of the iron is the same either in the boat or at the bottom of the sea, but the volume that moves from water is greater when it is in the boat, it is already the area of the boat that moves the water, whereby the iron and the boat does not sink.
When the iron is on the surface of the water in displaced volume it is in the iron (V_Iron << V_boat), so in the relation
B- W = m a
The weight of the iron is greater than the thrust and it sinks
two posibilities
Therefore, the iron + boat system displaces more volume than the iron alone
If the system is the iron alone, it displaces the same volume in the boat and the water
Answer:
8.0 rad/s
Explanation:
I₁ = 1.0 kgm², ω₁ = -20.0 rad/s (clockwise is positive direction)
I₂ = 4.0 kgm², ω₂ = 15.0 rad/s
Angular momentum conservation:
I₁ω₁ + I₂ω₂ = (I₁ + I₂)ω
1.0 x (-20.0) + 4.0 * 15.0 = (1.0 + 4.0)ω
40.0 = 5.0ω
so ω = 8.0 rad/s