Answer:

Explanation:
The period of the simple pendulum is:

Where:
- Cord length, in m.
- Gravity constant, in
.
Given that the same pendulum is test on each planet, the following relation is formed:

The ratio of the gravitational constant on planet CornTeen to the gravitational constant on planet Earth is:



Answer:
600 J
Explanation:
The formula to find the kinetic energy of an object is
- m = mass in kg
- V = velocity in m/s
- KE is measured in Joules just as all other forms of energy.
Now, let's plug in the variables we're given and simplify.
Thus, the answer is 600 Joules.
A. fixed volume, changeable shape.
Answer: Capacitor
Explanation:
Given the following ;
At time, t = T/4 ; I = 0
At time, t = T/2 ; I = - Imax
Where T = period
We can confirm what the unknown element is by using the relation, such that the parameters satisfy the stated condition ;
Recall;
I = Iosin(wt + π/2) [for CAPACITOR]
w = 2π/T
At t = T/4
I = Iosin(2π/T(T/4) + π/2)
I = Iosin(π/2 + π/2)
I = Iosin(0)
I = 0
At t = T/2
I = Iosin(2π/T(T/2) + π/2)
I = Iosin(π + π/2)
I = Iosin(0)
I = Iosin(3π/2)
I = Iosin(540/2)
I = Iosin(270)
I = -Io
Note : Io = Imax
Both conditions are met, Hence, the unknown element is a CAPACITOR.