Answer:
A. 5.600 m
B. 5.800 s
C. 0.966 m/s
D. 0.315 m
Explanation:
A. The wavelength is the distance between 2 crests, which is 5.600 m
B. Period of the wave is the time for the wave to complete 1 circle (highest point to next highest point). Since it takes 2.9s to travel from highest point to lowest point, it would take another 2.9 to travel from lowest point to the next highest point. So the total time is 2.9 + 2.9 = 5.8 s,
C. The wavespeed is wavelength over unit of time:
5.6 / 5.8 = 0.966 m/s
D. The amplitude would be half the length of highest point to lowest point, which is 0.63 / 2 = 0.315 m
Answer:
0.159 Tesla per second
Explanation:
r = 2 m, e = 2 V,
Let the rate of magnetic field changing is dB / dt.
By use of Farady's law of electromagnetic induction
e = rate of change of magnetic flux
e = dФ /dt
e = A x dB / dt
2 = 3.14 x 2 x 2 x dB / dt
dB / dt = 0.159 Tesla per second
Answer:
a) 3.43 m/s
Explanation:
Due to the law of conservation of momentum, the total momentum of the bullet - rifle system must be conserved.
The total momentum before the bullet is shot is zero, because they are both at rest, so:
Instead the total momentum of the system after the shot is:
where:
m = 0.006 kg is the mass of the bullet
M = 1.4 kg is the mass of the rifle
v = 800 m/s is the velocity of the bullet
V is the recoil velocity of the rifle
The total momentum is conserved, therefore we can write:
Which means:
Solving for V, we can find the recoil velocity of the rifle:
where the negative sign indicates that the velocity is opposite to direction of the bullet: so the recoil speed is
a) 3.43 m/s
Answer:
A
Explanation:
You did not list the options. However, knowing the possible options from having seen the material myself - I can infer that the answer option is A. I apologize sincerely if this is wrong.
