Answer:
t= 1.34x10power 6 sec
Explanation:
l = lo ( 1+b / 1+b /)1/2 where L = wave length
(700mn/589mm)2 = 1.41 = 1+b/1-b
1.41-1.41b = 1+b
0.41= 2.41b
b = 0.17
v=5.1 x 10 7 m/s
v = at
t = a/v = 5.1 x 10power 7 m/s / 38m/s2= 1.34*10 power 6
t= 1.34x10power 6 sec
Answer:
(a) 2.512 m
(b) 144 m
(c) 904.32 m
Explanation:
radius, r = 4.8 m
(a) for 30 degree
As we know that in 360 degree it rotates a complete round that means circumference.
In 360 degree, it rotates = 2 x π x r
in 30 degree, it rotates = 2 x π x r x 30 / 360
= 2 x 3.14 x 4.8 x 30 / 360
= 2.512 m
(b) for 30 rad
As we know that in one complete rotation, it rotates by 2π radian.
so,
for 2π radian it rotates = 2 x π x r
for 30 radian, it rotates = 2 x π x r x 30 / 2 π = 144 m
(c) For 30 rev
In one complete revolution, it travels = 2 x π x r
in 30 rev, it travels = 2 x π x r x 30 = 2 x 3.14 x 4.8 x 30 = 904.32 m
The final magnification will be 400-fold or 400 times the original size of the object.
For magnifying smaller objects, a compound microscope is used.
A compound microscope consists of an objective and an eyepiece, whose diagram is shown in the adjoining image.
The lens near the object is called an objective and the other one is the eyepiece.
Let the magnification of the objective be m1
Let the magnification of the eyepiece be m2
The final magnification by the microscope, M, will be
M = m1 x m2
Putting the values in the above equation
M = 40 x 10
M= 400
Thus, the final magnification will be 400-fold or 400 times the original size of the object.
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The work done by a person will be 2341.28 J
Work done is negative of change in potential energy, that is W=−(∆U). It means that Work done against a force (or work done on a system) increases its potential energy. And Work done by a force (or work done by the system) decreases its potential energy
mass = 60.33kg
height = 3.96 m
work done = change in potential energy
= m*g*h
= 60.33* 9.8 * 3.96 = 2341.28 J
The work done by a person will be 2341.28 J
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