12 protons in the nucleus
Answer:
U₁ = 129.4 J
Explanation:
The potential energy is
U = mg y - m g y₀
Where I correspond to the initial position, with this it is an additive constant, we can make it zero with the placement of the reference system, in this case the system is placed on the floor where the ladder rests.
The power power for people on the floor is
U₀ = 0 J
The potential energy for the person on the first step is
U₁ = m g y₁
In general the steps are 20 cm high
y₁ = 20 cm (1m / 100cm) = 0.20 m
U₁ = 66 9.8 0.20
U₁ = 129.4 J
Answer is option C. nitrogen as:-
OXYGEN- 21%
NITROGEN- 78%
CARBON DIOXIDE, ARGON, NEON and SEVERAL OTHER GASES- 1%
speed rate = 4 yards per minute (yds/min)
Distance = 20 yards
time = t
Apply the formula:
time = Distance / speed rate
Replacing:
Time = 20 yards / 4 yds/min = 5 minutes
<span>When a supersaturated solution is disturbed, for example by adding further crystals of ammonium nitrate, crystals will form from the solute in the supersaturated solution.</span>
