The momentum change of the running back is - 664.2 kg m/s or 664 west.
<u>Explanation:</u>
Momentum is defined as the change in velocity of any object along with its mass. So mathematically, momentum can be derived using the product of mass with the change in velocity.
As here mass is given as 82 kg and the initial velocity was 5.6 m/s and final velocity is 2.5 m/s.
Initial Momentum =
Final Momentum =
Momentum change = Final Momentum - Initial Momentum
Momentum change = - 205 - 459.2 = - 664.2 kg m/s or 664 west
Thus, the changing momentum is -664.2 kg m/s. The negative sign indicates that the momentum is acting in the opposite direction on changing in the direction of velocity.
B) compound.
A compound is usually made up of different Elements, a compound is likely to have a melting point as well.
light waves do not require a medium so A would be your answer good luck :)
Answer:
0.00264C
Explanation:
Using the Columbs law formula
F = kq1q2/r²
F is the force of attraction
q1 and q2 are the charges
r is the distance between the charges.
k is the Coulomb's cinsrsnty
Given F = 19N, q1 = -0.0005C
r = 25m q2 = ?
Substituting
19 = 9×10^9×-0.0005q2/25²
11875 = -4,500,000q2
q2 = 11,875/-4,500,000
q2 = - 0.0264C
Magnitude of the second charge is 0.00264C