Answer: choices a and b
Explanation:
Telescope can be defined as am optical instrument which is designed to observe the distant objects clear and nearer. It comprises of arrangement of lenses which allow the rays of light to be collected. The collected light is focused and the image so produced is magnified in the form of an image. The telescopes are prepared and manufactured on mountains top as this will help in preventing the distortion of light obtain from the star due to the fluctuation of air mass in the atmosphere. The atmospheric distortion affects the resolution, and affects the vision. The atmospheric pressure is low at the mountain tops so it will help in better observation of the sky.
Answer:
a) Angular speed(w) = 2.02rad/sec
b) 73J ( It is Inelastic Collision)
Explanation:
Given:
Mass=45kg
Length on each side = 1.5m side which is hangs vertically from a frictionless pivot at the center of its upper edge.
We need to calculate
(a) What is the angular speed and
(b) To know why the angular momentum conserved but not the linear momentum
CHECK THE ATTACHMENT FOR DETAILED EXPLATION
When astronauts are on the moon they do not float away into space
Answer:
The resistance of the axon is .
Explanation:
Given that,
Inner diameter of the model of an axon,
Radius of the model,
Resistivity of the fluid inside the tube wall,
Length of the axon, l = 2 mm = 0.002 m
We know that the resistance in terms of resistivity of an object is given by :
So, the resistance of the axon is . Hence, this is the required solution.
Answer:
The power is 29.76 J.
Explanation:
Given that,
Force = 22 N
Radius = 0.28 m
Time = 1.3 s
The force is always applied parallel to the motion of the handle.
So, angle is 0°.
We need to calculate the work done
Using formula of work done
Where, F = force
d = distance
Put the value into the formula
We need to calculate the power
Using formula of power
Hence, The power is 29.76 J.