Two lenses that should be purchased are lenses with the power of 1d and 4d or 2d and 3d.
We need to know about the power of the lens to solve this problem. Lens power can be defined as the ability of the optical device to see. It can be represented by a dioptre unit. The relaxed power formula is
P = 1 / f
where P is the power of the lens in dioptre, and f is the focal length.
From the question above, the given parameter is
f = 0.2 m
By substituting the given parameters, we can calculate the power of the lens
P = 1 / f
P = 1 / 0.2
P = 5d
The total diopter should be 5d.
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It is against the motion. That's why it's negative.
It is highly helpful to know that the mechanical advantage (M.A.) of Class two levers is usually greater than one. It is because the overall length of the Effort Arm is higher than the overall length of Load Arm. It is easily known by MA is effort arm/load arm.
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The mechanical advantage of a lever of the second order is always greater than one because its effort arm is always longer than the load arm i.e. Effort arm > Load arm.
Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm.
First Class Lever -- the effort and the load on either side of the fulcrum. Some examples would be a crowbar or a seesaw. The effort is only less than the load if the load is closer to the fulcrum. The lever then acts as a force magnifier and the mechanical advantage is greater than one.
Answer:
-6.0 m/s, 10.4 m/s
Explanation:
To find the x- and y- components, we have to apply the formulas:
where
v = 12.0 m/s is the magnitude of the vector
is the angle between the direction of the vector and the positive x-axis
Here, the angle given is the angle above the negative x-axis; this means that the angle with respect to the positive x-axis is
So, the two components are:
Only ' A ' is always true.<em> (choice-1)</em>
' B ' is not true when you drop a red hot spoon into cold soup.
' C ' is not true when you drop a red hot marble into a cool swimming pool.
