Answer:

Explanation:
The period of a simple pendulum is given by the equation

where
L is the lenght of the pendulum
g is the acceleration due to gravity at the location of the pendulum
We notice from the formula that the period of a pendulum does not depend on the mass of the system
In this problem:
-The pendulum comes back to the point of release exactly 2.4 seconds after the release. --> this means that the period of the pendulum is
T = 2.4 s
- The length of the pendulum is
L = 1.3 m
Re-arranging the equation for g, we can find the acceleration due to gravity on the planet:

Answer:
a) The wavelength of light is 6×10^-7 m.
b) The size of the central peak is 6×10^-3 m.
Explanation:
let:
α be the distance between the 1st and 2nd maxima
d = 0.4 mm be the grating slit space
X be the distance to the screen
a) α = λ×X/d
λ = α×d/X
= (0.3×10^-2)×(0.4×10^-3)/(2)
= 6×10^-7 m
Therefore, the wavelength of light is 6×10^-7 m.
b) the size of the central peak is given by:
D = 2×λ×X/d
= 2×(6×10^-7)×(2)/(0.4×10^-3)
= 6×10^-3 m
Therefore, the size of the central peak is 6×10^-3 m.
Answer:
a) 
b) 
c)
,
Explanation:
From the question we are told that:
Mass 
Velocity 
Coefficient of Rolling Friction 
a)
Generally the equation for The Propulsion Force is mathematically given by



b)
Therefore Power Required at




c)



Generally the equation for Work-done is mathematically given by



Therefore
Efficiency

Since
Energy in one gallon of gas is

Therefore


Answer:
<em>Loop of Henle.</em>
Explanation:
<u>Loop of Henle</u><em> is a mechanism that establishes the medullary osmotic gradient, that depends on its important application in day to day life. </em>
Moreover the loop of Henle is very very essential for concentrating the urine, they do not work at all alone. Loop of Henle looks like U shaped and it is long and it is present in birds, reptiles, and as well as mammals.