Answer:
63.8 V
Explanation:
We are given that
Potential difference,V=140 V
We know that
According to question
In series
Potential across 1.2 square cm=
Hence, the voltage across the 1.2 square cm wire=63.8 V
Humans can typically perceive frequencies that range from 20 Hz–20 kHz. Dogs can hear sounds up to 45 kHz. Dog whistles produce
2 answers:
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Explanation:
The nucleus of an atom can be modeled as several protons and neutrons closely packed together.
Mass of the particle,
Radius of the particle,
(a) The density of the nucleus of an atom is given by mass per unit area of the particle. Mathematically, it is given by :
, V is the volume of the particle
So, the density of the nucleus of an atom is .
(b) Density of iron,
Taking ratio of the density of nucleus of an atom and the density of iron as :
So, the density of the nucleus of an atom is times greater than the density of iron. Hence, this is the required solution.
The final velocity of the truck is found as 146.969 m/s.
Explanation:
As it is stated that the lorry was in standstill position before travelling a distance or covering a distance of 3600 m, the initial velocity is considered as zero. Then, it is stated that the lorry travels with constant acceleration. So we can use the equations of motion to determine the final velocity of the lorry when it reaches 3600 m distance.
Thus, a initial velocity (u) = 0, acceleration a = 3 m/s² and the displacement s is 3600 m. The third equation of motion should be used to determine the final velocity as below.
Then, the final velocity will be
Thus, the final velocity of the truck is found as 146.969 m/s.