Instantaneous speed is measured
1 answer:
Answer:
C. At a particular instant
Explanation:
Speed is the defined as the ratio between the distance covered by an object and the time taken:
where d is the distance and t the time.
However, there are two possible measurements of speed:
- Average speed: this is the speed measured over a non-zero time interval (for example: a car moving 100 metres in 5 seconds; its average speed is
- Instantaneous speed: this is the speed of an object measured at a particular instant in time, so for a time interval that tends to zero. So, in the previous example, the average speed is 20 m/s but the instantaneous speed of the car at various instants of time can be different from that value.
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Answer:
The induced emf between two end is V
Explanation:
Given:
Length of rod m
Height m
Magnetic field T
For finding induced emf,
Where velocity of rod,
For finding the velocity of rod.
From kinematics equation,
Where initial velocity,
Put the velocity in above equation,
V
Therefore, the induced emf between two end is V
Complete Question
The complete question is shown on the first uploaded image
Answer:
The total pressure is
The temperature at the bottom is
Explanation:
From the question we are told that
The length of the glass tube is
The length of water rise at the bottom of the lake
The depth of the lake is
The air temperature is
The atmospheric pressure is
The density of water is
The total pressure at the bottom of the lake is mathematically represented as
substituting values
According to ideal gas law
At the surface the glass tube not covered by water at surface
Where is the volume of
At the bottom of the lake
Where is the volume of the glass tube not covered by water at bottom
and i the temperature at the bottom
So the ratio between the temperature at the surface to the temperature at the bottom is mathematically represented as
substituting values
=>
