Answer:
K = 13448.64eV
Explanation:
(a) In order to calculate the kinetic energy of the electrons, to "see" the atom, you take into account that the wavelength of the electrons must be of the order of the resolution required (0.010nm).
Then, you first calculate, by using the Broglies' relation, the momentum of the electron associated to a wavelength of 0.010nm:
(1)
p: momentum of the electron
h: Planck's constant = 6.626*10^-34 Js
λ: wavelength = 0.010nm
You replace the values of the parameters in the equation (1):
With this values of the momentum of the electron you can calculate the kinetic energy of the electron by using the following formula:
(2)
m: mass of the electron = 9.1*10^-31 kg
In electron volts you obtain:
The kinetic energy required for the electrons must be, at least, of 13448.64 eV
False, because I doesn’t matter if there is noise pollution the child will still able to learn the way words work
They share electrons because it is a covalent bond
Answer:
Answer is option b) 2.97m
Explanation:
With the relationship between the force exerted by the runner and the mass that it has, I can determine the acceleration it will have:
F= m × a ⇒ a= (650 kg ×(m/s^2)) / (70kg)= 9.286 (m/s^2)
With the acceleration that prints the force exerted and the time I can determine the distance traveled in the interval:
Distance= (1/2) × a × t^2 = (1/2) × 9.286 (m/s^2) × ((0.8s)^2)= 2.97m
Answer:
The natural frequency = 50 rad/s = 7.96 Hz
Damping ratio = 0.5
Explanation:
The natural frequency is calculated in this manner
w = √(k/m)
k = spring constant = 5 N/m
m = mass = 2 g = 0.002 kg
w = √(5/0.002) = 50 rad/s
w = 2πf
50 = 2πf
f = 50/(2π) = 7.96 Hz
Damping ratio = c/[2√(mk)] = 0.1/(2 × √(5 × 0.002)) = 0.5
