Density can be found when mass and volume is known. The density of 5 liter of water is 1000kg/m³.
<h3>What is density?</h3>
The density ρ of any substance is the ratio of mass m and its volume V.
ρ = m/V
Given is the mass of water as 5 kg and the volume is 5 liter.
as, 1 L = 10−³m³
So, 5 L = 5×10−³m³
Then, density would be
ρ = 5kg / 5×10−³m³
ρ = 1000 kg/m³
Thus, the density of 5l of water is 1000kg/m³.
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- Wavelength,
- Amplitude
- Time-Period,
- Frequency
- Velocity or Speed
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed. The minimum distance in which a sound wave repeats itself is called its wavelength. That is it is the length of one complete wave
The average speed of the person over the entire trip is 3.75 m/s.
<h3>Average speed of the person</h3>
Average speed = total distance/total time
Average speed = (d + d)/(d/Va + d/Vb)
where;
- d is the distance in a single trip
- Va is speed from point A
- Vb is the speed from point B
Average speed = (2Vavb)/(Va + Vb)
Average speed = (2 x 5 x 3)/(5 + 3)
Average speed = 3.75 m/s
Thus, the average speed of the person over the entire trip is 3.75 m/s.
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Here, Force = m * a = 34 * 2 = 68 N
According to Newton's third law, fence will exert equal and opposite force (by direction) on the robot.
In short, Your Answer would be Option C) <span>The robot exerts a force of 68 N on the fence; the fence exerts a force of 68 N on the robot.
Hope this helps!</span>
