Answer : The correct option is, (4)
Solution :
The relation between the frequency and time period is that the frequency is inversely proportional to the time period.
It is written as,
where,
= frequency of the sound wave = 340 Hz =
T = time period of a sound wave = ?
Now put all the given values in the above expression, we get the time period of the a sound wave.
Therefore, the period of a sound wave is,
Answer: D
Explanation:
The net force acting on an object is equal to the resultant of the forces acting on the object itself.
In object A), we see that the vertical forces are balanced (+3 N upward and -3 N downward), as well as the horizontal forces (+5 N right and -5 N left), so the net force is zero.
In object B), the vertical forces are balanced (+3 N upward and -3 N downward). The horizontal force (5 N left) is not balanced, so it produces a net force, however this net force is towards left.
In object C), there are only two vertical forces which are balanced (+20 N upward and -20 N downward), so the net force is zero.
In object D), there are only two vertical forces which are not balanced, and the net force is +40 N (upward) - 25 N (downward) = +15 N upward.
It is d or c i say c because its mixed with chemicals and d bc the temperture drop to get it cold
The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature. The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.
Answer:
12.72 sec
Explanation:
The time it takes to travel a certain distance can be found by dividing the distance that needs to be travelled by the speed with which you are travelling, therefore...