Answer:
f = 0.84 m
Explanation:
given,
near point of the distance from eye(d_i) = 0.60 m
distance he can read (d_o)= 0.350 m
focal length of the contact lens = ?
now,
Using lens formula
f = 0.84 m
Hence, The focal length of the contact lens that person needed is equal to
f = 0.84 m
Answer:
3.76188 kg
36.9040428 N
Yes
Explanation:
g = Acceleration due to gravity = 9.81 m/s²
L = Length of rod = 81.2 cm
d = Diameter of rod = 2.75 cm
r = Radius = 
A = Area of the cylinder =
v = Volume = 
m = Mass
= Density of rod = 7800 kg/m³
Density
The mass of the rod is 3.76188 kg.
As the the mass of the rod is 3.76188 kg I will be able to carry the rod.
Weight
The weight of the rod is 36.9040428 N
The distance covered will be 0.301m.
firstly we will new to calculate acceleration (a).
we can do so using newtons first law of motion.
v=u + a × t
where
a is the acceleration
t is the time
from here we get
a=(v-u)/t
a=(4-0)/0.15
a=26.67m/s²
using newtons second law of motion
s=u.t+1/2at²
where s is distance travelled in t seconds.
we get,
s=0.301m
learn more about newtons law of motion here:
brainly.com/question/129361
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Answer:
Here down below is 3 things true about composite materials
Explanation:
-They’re made up of more than one substance.
-They have the same or similar properties as the materials used to make them.
-They’re always made of metal.
-They’re readily available in nature.
It is B because the other ones are good.
