Answer: 7.175*10^18
Explanation:
Energy of a wave:
E = nhc/λ, where
E = energy of the wave
n = no of photons
h = Planck's Constant
c = speed of light
λ = wavelength of the wave
4000 = (n * 6.63*10^-34 * 3*10^8) / (510*10^-9)
4000 = 1.989*10^-25 * n / 510*10^-9
4000 = 3.9*10^-19 * n
n = 1.025*10^22 photons per second per meter²
7.0 cm² = 7.0 / 10,000 m²
= 7 x 10⁻⁴
Photons per second = 1.025*10^22 * 7 x 10⁻⁴
= 7.175*10^18 photons per second
Answer:
The ratio of the pressure at the top to the pressure at the bottom is
Explanation:
Given that,
Number of molecules
Mass
Temperature = 300 K
Height
We need to calculate the ratio of the pressure at the top to the pressure at the bottom
Using barometric formula
Where, m = mass
g = acceleration due to gravity
h = height
k = Boltzmann constant
T = temperature
Put the value in to the formula
Hence, The ratio of the pressure at the top to the pressure at the bottom is
Im not sure but i think its 4ft
hope this helps
Answer:
D. 10 seconds
Explanation:
All Houston Methodist Hospital buildings employs the use of EPSS(Emergency Power Supply System). This system employs the use of an emergency power generator that turns on to supply emergency power after normal power shuts down within 10 seconds during power outage.
Due to it being used in a hospital the importance of this emergency power system cannot be overemphasized as it is used to provide power supply to hospital equipment such as life support machines etc.