Answer:
The mailbag will take 2.44 seconds to reach the ground.
Explanation:
The height of a helicopter above the ground is given by:

Height of helicopter at t = 2.10 seconds

The helicopter releases a small mailbag from the height of 29.17 m.
The initial velocity of mailbag = u = 0 m/s
Duration in which mailbag will reach the ground = T
Acceleration due to gravity = g = 
Using second equation of motion ;

We have , s = 29.17
u = 0 m/s
t = T

Solving for T, we gte :
T = 2.44 seconds
The mailbag will take 2.44 seconds to reach the ground.
Answer:
(A) 0.1842 T (B)
(C) 0.2188 J (D) 
Explanation:
Length of the solenoid L = 27 cm =0.27 m
Area of cross section 
Number of turns N = 440
Current i = 90 A
(A) Magnetic field in the solenoid 
(B) The energy density is given by 
(C) The total energy contained in the coli magnetic field = energy density ×volume = energy density ×l×A
So the total energy 
(D) The energy stored in the inductor is given by
So 
Answer:

Explanation:
Speed is just the magnitude of velocity and has no direction. This means that we are just going to take out the direction, "West".
Answer:
Radio telescopes .
Explanation:
They have a modest size that can't make out as much detail (have a lower resolution) than visible light telescopes