Momentum = mass x velocity so if velocity is kept same and mass is increased then momentum will increase.
Explanation:
Let i, j and k represents east, north and upward direction respectively.
Velocity due north, 
Velocity of the crosswind, 
Velocity of downdraft,
(downward direction)
(a) Let v is the position vector that represents the velocity of the plane relative to the ground. It is given by :

(b) The speed of the plane relative to the ground can be calculated as :

v = 66 m/s
Hence, this is the required solution.
Answer:
30.81°
Explanation:
θ₁ = angle of incidence = 50°
θ₂ = Angle of refraction
n₂ = Refractive index of glass = 1.5
n₁ = Refractive index of air = 1.0003
From Snell's Law
Using Snell's law as:


Angle of refraction= sin⁻¹ 0.5122 = 30.81°.
Answer:
The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.
Explanation:
From Physics we get that expansion of the rod portion is found by this formula:
(Eq. 1)
Where:
- Expansion of the rod portion, measured in meters.
- Linear coefficient of expansion for titanium, measured in
.
- Initial length of the rod portion, measured in meters.
- Initial temperature of the rod portion, measured in Celsius.
- Final temperature of the rod portion, measured in Celsius.
If we know that
,
,
and
, the expansion experimented by the rod portion is:


The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.