Answer:
76.36km
Explanation:
Average speed=Total distance covered ÷ Total
time taken
Distance=Time * speed
3*80=240km
2*90=180km
Total distance covered =240+180=420km
Total time taken=3+1/2 an hour+2=5 1/2 hours
Average speed =420km ÷5 1/2 hours
=76.36km/h
For the law of conservation of energy, the loss in potential energy of the He+ ion should be equal to the gain in kinetic energy:
which can be rewritten as
where
is the charge of the ion,
is the mass of the ion,
is the speed of the ion.
By using these values, we find the potential difference needed:
and the negative sign means the final point is at lower voltage than the initial point, and this is correct, because the ion has positive charge and a positive charge travels naturally from higher voltages to lower voltages.
Well, the answer here is B. NaOH is Sodium Hydroxide and yes that has a very STRONG base. So this is a proven fact because, the element is held together by covalent bonds.
Answer:
d: +3
Explanation:
X1 is going +3 meters to arrive to X2. More scientifically -6+3= -3 which is the value of X2 which tells us that the correct answer is +3.