Answer:
Its probably D (the sound energy)
Answer:
Because here is a number of electrons more applied to the balloon
Explanation:
Given that,
Mass of a ball, m = 250 g = 0.25 kg
Initial velocity of the ball, u = 6 m/s
Final velocity of the ball, v = -9 m/s
(a) Impulse of the system is given by :
Impulse = change in momentum
J = m(v-u)
J = 0.25(-9-6)
= -3.75 kg-m/s
(b) Impulse = Ft
If t = 0.5 min = 30 s
So,

So, impulse of the system is -3.75 kg-m/s and the force is -0.125 N.
Answer:
Magnitude of the hiker's total displacement = 3.5 km
Angle and direction of the hiker's total displacement = 22 degree south of west
Explanation:
The first Displacement in vector form is
= -4.5 cos 45i +4.5 sin 45j
= -3.182i + 3.182j
The second Displacement in vector form is
= -4.5j
The total displacement is ,

= -3.182i + 3.182j - 4.5j
=-3.182i-1.318j
The magnitude of the displacement is,



s= 3.444
The direction is,


