Answer:
The right leg (oil on top) is higher
Explanation:
Given:
The mass density of oil is lesser than the mass density of water.
- When we pour water in a u-tube that is open at both the ends then the water on both the sides of the tube will rise up to the same height because the algebraic sum of the pressure exerted by the water column and the pressure of atmosphere on both the openings is equal.
- When we pour oil in the right side of the u-tube we observe that the column of liquid on the right side rises more than the column of the liquid on the left side. However we observe that there is rise on both sides of the u-tube.
<u>This is justified by the equation:</u>
where:
density of the liquid
acceleration due to gravity
height of the liquid column
<span> B. The temperature is not rising because the heat is being used to break the connections between the molecules </span>
Answer: Relative motion
Explanation: If two objects are moving either towards or away from each other with both having their velocities in a reference frame and someone is outside this reference frame seeing the motion of the two objects.
The observer ( in his own frame of reference) will measure a different velocity as opposed to the velocities of the two object in their own reference frame. p
Both the velocity measured by the observer in his own reference frame and the velocity of both object in their reference is correct.
Velocities of this nature that have varying values based on motion referenced to another body is known as relative velocity.
Motion of this nature is known as relative motion.
<em>Note that the word reference frame is simply any where the motion is occurring and the specified laws of motion is valid</em>
<em />
For this example of ours, the reference frame of the companion is the train and the telephone poles has their reference frame as the earth.
The companion will measure the velocity of the telephone poles relative to him and the velocity of the telephone pole relative to an observer outside the train will be of a different value.
