Explanation:
Hello ! Let's solve this!
1-atomic number: the atomic number is the number of protons that the atom has
2-mass number: is the amount of protons plus the amount of neutrons in the atom
3-atomic weight: average of the masses of an atom per 1/12 of the mass of carbon
4-isotope: it is the same element that has the same number of protons but a different number of neutrons
5-natural abundance: measures the amount of isotopes of an element in nature
6-unit of atomic mass: (uma) is a unit that is equivalent to 1/12 of the carbon atom
Answer:
11.72 m/s
Explanation:
Energy is conserved when there are no energy loses. So potential energy and kinetic energy must be the same at the beginning and at the end.
Mechanical energy is the addition of both energy types, which is conserved.
So E= P+ K,
E: Mechanical energy
P: Potential Energy
K: kinetic energy.
P= m*g*h
K= (m*v^2)/2
M:mass
G:gravity=9.8m/s^2
H:altitude=7m
V: Velocity.
So P+K is conserved,
P1+K1=P2+K2
At the beginning there's no movement, so V=0, then K1=0
At the end there's no altitude, so H=0, then P2=0.
For those reasons,
P1=K2
M*G*H= M*v^2*0.5. As M is in both sides, we can take it out, and replace gravity and altitude with the values we already have.
9,81(m/s^2)* 7m = v^2 *0.5
68.67 (m/s)^2 = v^2 *0.5
(68.67 (m/s)^2 :0.5) ^ (1/2)= |v|
137.34^0.5=|v|
11.72 m/s= |v|
The sign will depend on where are we considering the 0 so will it be positive velocity if it's increasing direction or negative if it is decreasing
<span>At absolute zero, all particle motion stops so it is easy to transfer energy.</span>
