I think the correct answer from the choices listed above is the third option. <span>A 2-N force presses down on the cement block at the same time as a 1.5 -N Force presses up on the cement blocks is an unbalanced system. The forces does not equate to zero. Hope this answers the question. Have a nice day.</span>
Answer:
1. It undergoes reflection. 2. It undergoes refraction. 3. It undergoes diffraction.
Explanation:
1. It undergoes reflection. This is because it bounces off surfaces when incident on them.
2. It undergoes refraction. This is because it changes direction when it passes from one medium to another
3. It undergoes diffraction. This is because it spreads out when it passes through doors and windows similar in dimension to the dimensions of its wavelength
Answer:
The new force becomes 3 times of the initial force.
Explanation:
Let q₁ and q₂ are two charged particles. The force between them is given by :
If
and
Also, r' = r/2
New force,
Putting all the above values,
So, the new force becomes 3 times of the initial force.
Answer:
80m, assuming g=10m/s^2
Explanation:
40m/s will be reduced to 0m/s in 4 seconds. 4 seconds x 40m/s would be 160m up, but you will only get half of that because you decelerate linearly to 0m/s. This leaves you with 4 x 20 = 80m.
Sublimation is the changing of a solid directly to a gas without turning into a liquid first. Where as vaporization is the liquid turning into a gas.