#1. On a school bus traveling 22 m/s , students walks to the back of the bus at a rate of 1m/s . What is the speed of the studen
1 answer:
You might be interested in
Answer:
The speed of the knife after passing through the target is 9.33 m/s.
Explanation:
We can find the speed of the knife after the impact by conservation of linear momentum:
Where:
: is the mass of the knife = 22.5 g = 0.0225 kg
: is the mass of the target = 300 g = 0.300 kg
: is the initial speed of the knife = 40.0 m/s
: is the initial speed of the target = 2.30 m/s
: is the final speed of the knife =?
: is the final speed of the target = 0 (it is stopped)
Taking as a positive direction the direction of the knife movement, we have:
Therefore, the speed of the knife after passing through the target is 9.33 m/s.
I hope it helps you!
The frequency of the photon emitted by a hydrogen atom is
A particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.
In the case of light, the frequency, symbolized by the Greek letter nu (ν), of any wave equals the speed of light, c, divided by the wavelength λ:
v = c/λ
Since the wavelength λ is in the bottom of the fraction, the frequency is inversely proportional to the wavelength.
v = c/λ
v=
By using Rydberg's formula,
1/λ
1/λ =
λ =
is frequency of the photon emitted by a hydrogen atom.
Learn more about Photons here:brainly.com/question/20912241
#SPJ1