Answer:
Explanation:
The overall energy expenditure of the salmon, which corresponds to its swimming upstream effort, 
, is linked to its specific mechanical power. 
calculated per unit mass can be derived from the following equation:
As a result, the total energy utilized during the 22-day journey is 7.603 MJ
The maximum depth at which he could still breathe, given the pressure of -74 mm Hg, equates to 0.98 m. Pressure of -74 mm Hg translates to 9605 Pa or 9709 N/m². With the density of water set at 1000 kg/m³, we can utilize the pressure equation P = rho g h to determine h, deriving that h = 0.98 m.
The distinction lies in the fact that the candle emits an emission spectrum, while the book reflects an absorption spectrum. In the case of the book, light is observed from all directions, causing its reflection to be diffuse. Explanation: The light emitted by a candle originates from the heat of the flame, composed of a combination of emissions from a black body at that temperature along with emissions from the chemical elements within the candle. On the contrary, the light reflected off a book cover consists of the incident light spectrum minus the wavelengths that trigger electronic transitions in the cover's elements, resulting in dark areas on the spectrum. Consequently, the difference stems from the candle producing an emission spectrum, whereas the book showcases an absorption spectrum. For a book's cover to reflect light specularly, incident rays would need to reflect uniformly, creating dark areas. However, since light is observed from all directions when reflecting off a book, the result is diffuse reflection.
Answer:
Part a)
A = 0.0581 m
Part b)
T = 0.37 s
Explanation:
A slice is dropped onto the plate from a height of 0.250 m,
therefore the speed of the slice upon impact is calculated as
We know that
Now applying the conservation of momentum:
From this equation, we find:
When the slice rests on the plate, the new mean position can be expressed as
We also determine that the speed of SHM is represented as
Here, we derive values from
Using the previous formula gives:
Part b)
The time period for the scale is computed as
