Answer:
to focus the link light
Explanation:
Because the lens is flexible and elastic, it can change its curved shape to focus on objects and people that are either nearby or at a distance. ... The ciliary muscles, which are part of the ciliary body, are attached to the lens and contract or release to change the lens shape and curvature.
Answer:
The efificiency is 0,25 of the machine (25%). See the explanation below
Explanation:
We calculate the efficiency with this formula:
Efficiency = energy obtained/energy supplied= 300 Joule/1200 Joule
Efficiency= 0,25
Efficiency(%) = 0,25 x100 = 25%
Answer:
Diameter, d = 95.7 cm
Explanation:
It is given that,
Angular separation of the two components of a double star is, 
Wavelength of double star, 
Let d is the diameter of the smallest telescope mirror that will resolve the double star. The formula for the angular separation is given by :




or
d = 95.7 cm
So, the diameter of the smallest telescope mirror that will resolve the double star is 95.7 cm. Hence, this is the required solution.
Answer: 2.5 m/s²
Explanation:
distance S=180 m
Time t=6s
Speed at speed point: V2=45 m/s
Acceleration is calculated a=(V2-V1)/t
V1=S/t
V1=180m/6s
V1=30m/s
a=(45m/s-30m/s)/6s
a=15m/s/6s
a=2.5m/s²
Answer:
a) The frequency of the eardrum's vibration is 732.62 Hz.
b) The maximum acceleration of the eardrum is 13.35 m/s².
Explanation:
a) The maximum speed of a vibration is given by:

where:
A is the amplitude of the wave
f is the frequency of the wave
Then,

b) The maximum acceleration of a vibration is given by:
