If lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectivel
1 answer:
You might be interested in
Answer:
C) 3,000 kg m/s
Explanation:
We can consider the horizontal velocity of the motorcycle to be zero, since it rolls off the edge of the cliff very slowly. So, we only need to find the vertical velocity at the time of the impact with the ground.
The vertical velocity of the motorcycle at time t is given by (free-fall motion):
where
is the initial vertical velocity (zero, since the motorcycle is not moving)
g = 9.8 m/s^2 is the acceleration due to gravity
t is the time
Since the motorcycle hits the ground after t = 3 seconds, we have
And since we know its mass, m=100 kg, we can find its momentum:
and the negative sign simply means downward direction.
Answer:
Work function of the metal is 3.24 eV.
Explanation:
It is given that,
Wavelength,
Let W is the work function of the metal. It is given by using Einstein's photoelectric effect equation. It is given by :
Since,
So, W = 3.24 eV
So, the work function of the metal is 3.24 eV. Hence, this is the required solution.