Answer:
(a) Ball with 6.35 rev/sec gives greater speed
(b) So centripetal acceleration of ball with rotation 8.16 m/sec
So centripetal acceleration of ball with rotation 6.35 m/sec
Explanation:
(a) In first case angular speed 
rev/sec and length of the chain = 0.8 m
So velocity 
In second case angular speed angular speed 
and length of the chain that is r = 0.6 m
So velocity 
So 6.35 rev/sec gives greater speed
(b) Centripetal acceleration is given by 
So centripetal acceleration of ball with rotation 8.16 m/sec
So centripetal acceleration of ball with rotation 6.35 m/sec
Answer:
Nuclear power does not contribute to climate change
Explanation:
The density of the metal sphere is 2 times the density of the liquid as proved.
<h3>Net upward force acting on the metal sphere</h3>
The net upward force acting on the sphere as it is dropped into the liquid is calculated as follows;
F = σVg - ρVg
ma = σVg - ρVg
where;
- ρ is density of the liquid
- σ is the density of the metal
- a is acceleration of the metal
σV(a) = σVg - ρVg
σ(a) = σg - ρg
σ(g/2) = σg - ρg
g(σ/2) = g(σ - ρ)
σ/2 = σ - ρ
σ/2 - σ = - ρ
-σ/2 = - ρ
σ = 2ρ --- proved
Thus, the density of the metal sphere is 2 times the density of the liquid as proved.
Learn more about density here: brainly.com/question/1354972
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Answer:
5 Ω
Explanation:
When it is bent into a square, each side of the square will get 5 Ω resistance. As considered diagonally ,path of the wire between to diagonal points is the two sides of the square (that is half the length of the wire connected in parallel position). Which gives 10 ohm parallel to 10 ohm wire. So it finally read as 5 Ω wire
