Answer:
A
Since the car is moving to the right, the Normal Force is balancing the Weight and the Net Force is 10 N, right.
Explanation:
as the answers says, the only two forces in the y axis are the normal force and the weight, and they balance each other. On the x axis, you have 20N to the right and the friction is a force that opposes the movement, so the 10N are to the left. The net force is 20 - 10 = 10N.
It is round or say spherical to widen the range of photography and it is designed to focus the image as the ray are coming from infinity so !!
I am not an expert of camera but ya it is the main theme !!
Answer:
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Explanation:
is there gonna be a bad thing or a good thing
To solve the problem it is necessary to take into account the concepts related to energy efficiency in the engines, the work done, the heat input in the systems, the exchange and loss of heat in the soupy the radius between the work done the lost heat ( efficiency).
By definition the efficiency of the heat engine is

Where,
Temperature at the room
Temperature of the soup
The work done is defined as,

Where
represents the input heat and at the same time is defined as

Where,
Specific Heat
The change at the work would be defined then as





On the other hand we have that the heat lost by the soup is equal to


The ratio between both would be,


Replacing with our values we have,


Therefore the fraction of heat lost by the soup that can be turned into useable work by the engine is 0.0613.