Answer: a. 53cm b. Diverging c. 0.02dioptres
Explanation:
Since the person in question cannot see far object clearly, it shows that the individual is suffering from myopia (short sightedness).
If the object distance (u) is 53cm. for the person to be able to see far way, it means the image must be at infinity. This shows image distance v is infinity. Using the lens formula
1/f = 1/u+1/v
1/f = 1/53 + 1/Infinity
1/f = 1/53 + 0
f=53cm
b) The lens used is concave lens (diverging lens) to diverge all rays outwards
c) Power of a lens P will be 1/53.
P = 0.02dioptres
Answer:
Approximately 
, assuming that the gravitational field strength is 
.
Explanation:
Let 
denote the required angular velocity of this Ferris wheel. Let 
denote the mass of a particular passenger on this Ferris wheel.
At the topmost point of the Ferris wheel, there would be at most two forces acting on this passenger:
- Weight of the passenger (downwards),
, and possibly - Normal force
that the Ferris wheel exerts on this passenger (upwards.)
This passenger would feel "weightless" if the normal force on them is 
- that is, 
.
The net force on this passenger is 
. Hence, when , the net force on this passenger would be equal to .
Passengers on this Ferris wheel are in a centripetal motion of angular velocity around a circle of radius 
. Thus, the centripetal acceleration of these passengers would be 
. The net force on a passenger of mass would be 
.
Notice that 
. Solve this equation for , the angular speed of this Ferris wheel. Since and 
:
.
.
The question is asking for the angular velocity of this Ferris wheel in the unit 
, where 
. Apply unit conversion:
.
The electric filed in V/m is 1.58 * 10^6 V/m
<h3>What is the electric field?</h3>
We know that the electric field is obtained as the ratio of the voltage to the distance that separates the plates.
Thus;
E = V/d
E = electric field
V = voltage
d = distance of separation
E = 24 * 10^3 V/1.52 * 10^-2 m
E = 1.58 * 10^6 V/m
Learn more about electric field :brainly.com/question/8971780
#SPJ1
Answer:
True
Explanation:
The angular momentum around the center of the planet and the total mechanical energy will be preserved irrespective of whether the object moves from large R to small R. But on the other hand the kinetic energy of the planet will not be conserved because it can change from kinetic energy to potential energy.
Therefore the given statement is True.
