Displacement is d
Vf² = Vi² + 2 g d
(-20²) = (+10²) + 2 (-9.8) d
-19.6 d = 300
d = -15.3 m
negative means lower
time is t
d = Vi t + 1/2 g t²
-15.3 = 10 t + (-4.9) t²
4.9 t² - 10 t -15.3 = 0
t = 3.06 s
Hope this helps -John
Using organs cloned from the cells of the patient <span>would prevent the rejection of tissue after an organ transplant.</span>
Because over land they wont be cooled by the water, and the deeper water is, the colder it is.
Answer:
The required potential difference is 
.
Explanation:
We know, electric field is nothing but the negative gradiant of potential. Mathematically, in three-dimension,
In one dimension, the magnitude of the electric field is
where '
' is the applied voltage and '
'is the distance through which the voltage is applied.
Given, 
.
So the required potential difference is
