B. Acceleration. Acceleration is the cars increase in speed, while deceleration is the decrease in speed. Speed is how fast it's going. :) hope this helps
A ) The displacement:
d = v o t - (gt²) / 2 =
= 19.6 m/s × 1 s - ( 9.8 m/s² x 1 s² ) / 2 =
= 19.6 m - 4.9 m = 14.7 m
b ) v = v o - g t
0 = 19.6 m/s - 9.8 t ( when the ball is at the highest point )
9.8 t = 19.6
t = 19.6 : 9.8
t = 2 s
h = v o t - (gt²)/2 = 19.6 x 2 - ( 9.8 x 4 ) / 2 = 39.2 - 19.6
h = 19.6 m
c ) h = gt² / 2
19.6 = 9.8 t²/2
9.8 t² = 39.2
t² = 39.2 : 9.8
t² = 4
t 2 = 2 s ( and we know that t 1 = 2 s )
t = t 1 + t 2 = 2 s + 2 s = 4 s
Answer:
The magnetic flux links to its turns =
Wb.
Explanation:
Given :
Radius of circular coil =
m
Number of turns = 25
Magnetic field =
T
Magnetic flux (Φ) is a measure of the magnetic field lines passes through a given area. The unit of magnetic flux is weber (Wb).
We know that,
⇒ Φ = 
Where
ext. magnetic field,
area of loop or coil.
But here given in question, we have turns of wire so our above eq. modified as follows.
⇒ Φ = 
Where
no. of turns.
∴ Φ = 
Φ = 
Thus, the magnetic flux links to its turns = 