Answer:
1.38 s
Explanation:
Use the free falling formula
T = √(L)/ g
T = √18.75/9.8
T = 1.38 s
Answer:

Explanation:
As we know that the frequency of the wave is given as

here we know that

also we know that

now we have


Answer:
the internal resistance of the cell is 0.1 ohm.
Explanation:
Given;
p.d at the terminals of a battery at no load, E₁ = 25 V
p.d at the terminals of a battery at a load, E₂ = 24 V
current through the circuit, I = 10 A
The potential drop across the circuit, V = E₁ - E₂
= 25 V - 24 V
= 1 V
The internal resistance of the cell is calculated as follows;
r = V/I
r = 1 / 10
r = 0.1 ohm
Therefore, the internal resistance of the cell is 0.1 ohm.
The possible units for impulse would be:
<span>(N. s)
</span><span>(kg. m/s)</span>
Answer:
The answer is "151.25 J and -547.64 J".
Explanation:

Using formula:

Calculating the Work by net force
The above work is converted into thermal energy.
Now,
