Answer:
Put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating. Or if you want to be easy but messy, add dry ice to a bowl of water and watch how the water starts to boil.
Answer:
A. There are multiple paths that electrons can take through the circuit, and it is possible for the electron to pass through one circuit component but not another.
Explanation:
Parallel arrangement of components in an electric circuit puts different parts of the circuit on different branches. In a parallel connection, there are multiple paths for the electrons to take, and it is possible for electrons to pass through on circuit component without going through another. This is the reason why If there is a break in one branch of the circuit, electrons can still flow in other branches, and the same reason why one bulb going off in your home does prevent the other components in your home from coming on (your home is wired in a parallel electric circuit).
Answer:
1.98 m/s
Explanation:
To solve this, we would be using the law of conservation of energy, i.e total initial energy is equal to total final energy.
E(i) = E(f)
mgh = ½Iw² + ½mv²
Recall, v = wr, thus, w = v/r
Also, I = ½mr²
I = 0.5 * 5 * 2²
I = 10 kgm²
Remember,
mgh = ½Iw² + ½mv²
Substituting w for v/r, we have
mgh = ½I(v/r)² + ½mv²
Now, putting the values in the equation, we have
5 * 9.8 * 0.3 = ½ * 10 * (v/2)² + ½ * 5 * v²
14.7 = 1.25 v² + 2.5 v²
14.7 = 3.75 v²
v² = 14.7/3.75
v² = 3.92
v = √3.92
v = 1.98 m/s
Thus, the speed is 1.98 m/s
The principle of the Conservation of mass is so important, as it defines that in physics, nothing can be created or destroyed in an isolated system. It explains <span>that the number of molecules (parts) must be equal on both sides of the equation - BALANCED EQUATION</span>
Hi there!
a)
We can use the equation t = √2d/g to solve. (Let's let g = 10 m/s²)
**How to get this equation**
We have the equation:
Δd = vit + 1/2at²
For freefall, we know that vi = 0, so we are left with:
Δd = 1/2at²
We know that a = g. Rearrange in terms of t:
2Δd / a = t²
Square root both sides:
√(2d/a) = t
Plug in the height and gravity:
t = √2(400)/10 = √800/10 = √80 ≈ 8.94 sec
b)
Find the final speed using the following formula:
vf = √2gd
**How to derive**
We know the equation:
vf² = vi² + 2ad
vi = 0, so:
vf² = 2ad
Square root both sides:
vf = √2ad
vf = √2(400)(10) = √8000 ≈ 89.44 m/s
