Change in velocity over time is acceleration.
You're finding acceleration .
Answer:
Solids.
Explanation: Most elements are solids, only 11 are gases and 2 are liquids.
Answer:
2.41 x 10²³ particles
Explanation:
Data Given:
no. of moles of KCl = 0.4 mol
no. of particles = ?
Solution:
To find number of particles we use following formula
number of moles = number of particles / Avogadro's number
as we have to find number of particles so rearrange the above equation
no. of particles = no. of moles x Avogadro's number . . . . . . . (1)
Where
Avogadro's number = 6.022 x 10²³ particles per mol
6.022 x 10²³ are number of particles in one mole of a substance. and this quantity is known as Avogadro's number
So,
put values in above equation 1
no. of particles = 0.4 mol x 6.022 x 10²³ (particles/mol)
no. of particles = 2.41 x 10²³ particles
So, 0.4 mol KCl contains 2.41 x 10²³ representative particles
The kinetic energy of a charged particle is related to the electric field potential via the following equation:
1/2*m*v² = q* E -----(1)
where m = mass of the particle
v = velocity
q = charge
E = potential
since kinetic energy KE = 1/2mv², eq (1) can be written as:
KE = q*E
i.e kinetic energy of a charge is directly proportional to the strength of the electric field potential (E)
Therefore, as the charge moves from a higher to a lower potential, its kinetic energy will also decrease.
Ans: B)
The kinetic energy decreases
