Answer:
Weight required = 194.51 N
Explanation:
The elongation is given by
Length , L= 1.6 m
Diameter, d = 1.1 mm
Area
Change in length, ΔL = 2.8 mm = 0.0028 m
Young's modulus of copper, E = 117 GPa = 117 x 10⁹ Pa
Substituting,
Weight required = 194.51 N
Answer:
Explanation:
Generally from kinematics equations we have that
Here u is the initial velocity of the rock and the value is 0 m/s given that there was no information that it was in motion before the fall
substituting 1.43 s for t and for g we have that
=>
The negative sign show that the displacement is in the direction of the negative y-axis
Answer:
0.544 eV
Explanation:
To ionize the hydrogen atom
So the required energy is as
So
We have to calculate the energy required to ionize hydrogen atom when it is in n=5
So the energy should be less than