Answer:
Explanation:
Hello,
In this case, since the average velocity is computed as the change in the distance divided by the elapsed time:
As 4 m were displaced in 16 seconds, the average speed turns out:
Best regards.
Answer:
2.30 eV
Explanation:
Some details of the problem are missing:
"Light of wavelength 540 nm is required to extract electrons from sodium. What is the work function of sodium?"
The equation that describes the photoelectric effect is
where:
is the energy of the incoming photon, with
is Planck constant
is the speed of light
is the work function of the material
K is the maximum kinetic energy of the emitted photoelectrons
The minimum energy needed by the photons to extract the photoelectrons is that for which the kinetic energy is zero, so
K = 0
Therefore we have
In this problem, we know that the wavelength of the incoming light is
Therefore, we can find the work function of sodium:
And converting into electronvolts,
Answer:
skateboard b
Explanation:
p=mv
skateboard a
p=(60kg)(1.5m/s)=90kg*m/s
skateboard b
p=(50kg)(2m/s)=100kg*m/s
C because if you c the lane pushed back into the pin then it’s c
Answer:
Explanation:
What is the volume of a right cylinder with a circumference of 25π in and a height of 41.3 in? Explanation: The formula for the volume of a right cylinder is: V = A * h, where A is the area of the base, or πr2. Therefore, the total formula for the volume of the cylinder is: V = πr2h.