Question:
A particle is trapped in a 20 nm wide infinite potential well. What is the wavelength of the particle corresponding to n = 7 in nm?
Answer:
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Explanation:
Given
--- the width
Required
Determine the wavelength (
)
This is calculated as:
Substitute values for L and n
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To determine the number of hair dryers that can be plugged in to a circuit, our basis is the maximum threshold of the current. The current which measures 12 Amperes. This current already incorporates the safety factor that is important in industrial setting.
The voltage and the current can be related to the power by the equation:
P = I*V, where I is the current in Amperes and V is the voltage in volts
Solving for the total power:
P = 12 A * 110 V
P = 1,320 Watts
Since the power rating of each hair dryer is 350 W, we divide this to the total power to determine the capacity.
Number of hair dryers = 1,320 Watts/350 Watts per hair dryer
Number of hair dryers = 3.77
In this case, we cannot round off to 4 because this would already exceed the maximum power capacity. Therefore, the total number of hair dryers allowable is 3.
Answer:
λ = 649 nm
Explanation:
given,
frequency,f = 4.62 x 10¹⁴ Hz
speed of light,c = 3 x 10⁸ m/s
we know,
c = f λ
λ = 6.4935 x 10⁻⁷ m
λ = 649 x 10⁻⁹ m
λ = 649 nm
the wavelength of this light is equal to 649 nm
Answer: Option A: The spots on the balloon move away as the balloon is inflated.
one of the scientific models describes the galaxies are moving apart as the universe is expanding. This expansion theory came from the observation of red-shifted spectrum from all the directions indicating that the galaxies are moving away. This can be understood from the inflated balloon. Initially spots can be marked using a colored pen on the balloon.On inflating the balloon, it would be noticed that the spots on the balloon move away. Actually the position of the spots won't change, but the distance between the spots would expand. This is a good model to explain the expanding universe. The galaxies are neither moving in any random direction nor moving forward. So, rest of the options are not good models to explain the theory.
Employees execute tasks while entrepreneurs plan. An employee can take work day by day, whereas an entrepreneur has to consider how well the tasks are being performed relative to the long-term plan for the business.
