Answer:
the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.
Answer:
(a) 5 {Cos 37° + i Sin 37°}
(b) 2.24 {Cos 206.6° + i Sin 206.6°}
Explanation:
(a) 4 + 3 i
Here it is written in standard form
Z = r (Cosθ + i Sinθ)
By comparison
r cosθ = 4
r sinθ = 3
Squarring both sides and then add
r = 5
By dividing
tanθ = 0.75
θ = 37°
So, it is written as 5 {Cos 37° + i Sin 37°}
(b) -2 - i
Here it is written in standard form
Z = r (Cosθ + i Sinθ)
By comparison
r cosθ = -2
r sinθ = - 1
Squarring both sides and then add
r = 2.24
By dividing
tanθ = 0.5
θ = 206.6°
So, it is written as 2.24 {Cos 206.6° + i Sin 206.6°}
Electromagnetic Spectrum?
Answer:
The speed of light is constant for all observers
Explanation:
As per general postulate of relativity
- Lorentz covariance of special relativity becomes a local Lorentz covariance in the presence of matter.
So
light speed c is independent of States of matter
Answer:
Its resultant velocity will be 320 km/h.
Explanation:
The tail wind is called the wind that brings greater speed to an airplane, because it has the same direction as the airplane and, therefore, contributes a positive force to the force that the airplane's engines print on it.
Thus, a tailwind adds its speed to the speed of the plane, developing a resulting speed higher than that marked on the air transport speedometer.
In the case, given that the speed of the plane is 240 km / h and the tail wind is 80 km / h, the resulting speed will be 320 km / h.