What is the difference between Helium3, and Helium?
1 answer:
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Answer:
Explanation:
The average force is defined as the mass of the body multiplied by its average velocity over the contact time. According to the third Newton's law, the magnitude of the average force exerted on the wall by the ball is equal to the magnitude of the average force exerted on the ball by the wall. Thus:
Answer:
period = 0.65 sec
Explanation:
from the question we are given the following
extension (x) = 2.6 cm = 0.026 m
mass of object (Mo) = 7 g = 0.007 kg
mass of block (Mb) = 28 g = 0.028 g
acceleration due to gravity (g) = 9.8 m/s^{2}
period = 2π x
where k is the spring constant of the spring
and k = \frac{Mo x g}{x}
k = \frac{0.007 x 9.8}{0.026}
k = 2.64 N/m
now period = 2π x
period = 0.65 sec
<h2>The velocity at mean position is 50 cm/sec </h2>
Explanation:
The spring is stretched by a force = 200 x 980 dynes through a length 100 cm . By Hooks law The force F = - k x
here k is spring constant and x is displacement of weight .
Thus 200 x 980 = - k x 100
or k = 1960 dynes/cm
The time period of spring can be found by relation
T = 2π
= 2π = 2 sec
The frequency of vibration is taken as the reciprocal of time period
Thus frequency ν = =
= 0.5 revolution / sec
b. The maximum acceleration is at the end points of vibration , and is equal to acceleration due to gravity .
c. The velocity at mean position can be calculated from the kinetic energy relation of spring .
The kinetic energy of spring = k x²
and it is converted into kinetic energy of mass at mean position
Thus k x² =
m v²
or v = x
= x 5 = 50 cm/sec