Answer:
For the first one, its B) cities B and C
I'm not so sure, but I hope this helps.
Answer:
Explanation:
U = Energy = 76 J
x = Displacement of spring = 0.17 m
k = Spring constant
Energy is given by
Force is given by
The magnitude of force must you apply to hold the platform is .
Now
Additional energy
Answer:
28 m
Explanation:
v₀ = 23.4 m/s, g = -9.8 m/s²
at the peak v = 0
find h
v² - v₀² = 2gh
0 - 23.4² = 2(-9.8)h = -19.6 h
so h = 28 m
Answer:
<h2>10.52 kg</h2>
Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
f is the force
a is the acceleration
From the question we have
We have the final answer as
<h3>10.52 kg</h3>
Hope this helps you
Answer:
Rust occurs when iron or its alloys, such as steel, corrode. The surface of a piece of iron will corrode first in the presence of oxygen and water.The process of rusting is a combustion reaction, similar to fire. Left in contact with oxygen, iron will react with the oxygen to form rust.
Hope this helps!!