Answer:
okay
Explanation:
(wish i could help but im just answering for points)
Answer:(a)9.685 mm
(b)4.184 mm
Explanation:
Given
Wavelength of light 
Width of slit(b)=0.210
(a)Width of central maximum located 1.80m from slit


=9.685 mm
(b)Width of the first order bright fringe



Answer:
N₂=20.05 rpm
Explanation:
Given that
R= 19 cm
I=0.13 kg.m²
N₁ = 24.2 rpm

ω₁= 2.5 rad/s
m= 173 g = 0.173 kg
v=1.2 m
Initial angular momentum L₁
L₁ = Iω₁ - m v r ( negative sign because bird coming opposite to motion of the wire motion)
Final linear momentum L₂
L₂= I₂ ω₂
I₂ = I + m r²
The is no any external torque that is why angular momentum will be conserve
L₁ = L₂
Iω₁ - m v r = I₂ ω₂
Iω₁ - m v r = ( I + m r²) ω₂
Now by putting the all values
Iω₁ - m v r = ( I + m r²) ω₂
0.13 x 2.5 - 0.173 x 1.2 x 0.19 = ( 0.13 + 0.173 x 0.19²) ω₂
0.325 - 0.0394 = 0.136 ω₂
ω₂ = 2.1 rad/s

N₂=20.05 rpm
Answer:
1.) strength or energy to do an action or movement
2.)an object will jot change its motion unless acted on by an unbalanced force
Answer:
acceleration is constant, with a value less than 10 m/s²
Explanation:
The force pushing her downward are his weight and the at an angle
The weight is given as
W=mg
The component of the weight along x axis is Wsin θ
Forward force is Wsin θ
This forward force is the only force acting on the x-axis since it frictionless
Then, using newton law
ΣF = ma
WSinθ=ma
mgSinθ=ma
Then, a=gSin θ
Since sinθ is always between 1 and -1
-1<=sinθ<=1
The only time a=g is when It is on a straight line and not an incline plane and since we are give an inclined plane
Then, a will be less that g
Where g is constant =10m/s²
So the correct answer is D