Answer:
a) Ф = 0
b) P_avg=2*P_avg,1
Explanation:
<u>Givens:</u>
The phase difference is 0, 0.2λ, or 0.5λ between the waves.
<u>Part a: </u>
since the amplitude of the wave is directly proportional to the average rate so that the waves will transport greater energy when Ф = 0
Part b:
The two waves are identical to the first wave, the net amplitude is twice the first waves and the travel in the same tube thus
P_avg=2*P_avg,1
A; A chemical change makes a substance that wasn't there before. Moldy cheese has a new substance, color change and an odor.
Explanation:
KE is directly proportional to the square of velocity / speed.
if speed is 2 times (doubled) the KE will be
= 4 times the original KE
Answer:
Explanation:
a )
momentum of baseball before collision
mass x velocity
= .145 x 30.5
= 4.4225 kg m /s
momentum of brick after collision
= 5.75 x 1.1
= 6.325 kg m/s
Applying conservation of momentum
4.4225 + 0 = .145 x v + 6.325 , v is velocity of baseball after collision.
v = - 13.12 m / s
b )
kinetic energy of baseball before collision = 1/2 mv²
= .5 x .145 x 30.5²
= 67.44 J
Total kinetic energy before collision = 67.44 J
c )
kinetic energy of baseball after collision = 1/2 x .145 x 13.12²
= 12.48 J .
kinetic energy of brick after collision
= .5 x 5.75 x 1.1²
= 3.48 J
Total kinetic energy after collision
= 15.96 J
Answer: 10.36m/s
How? Just divide 200m by 19.3 and you will get how fast he ran per m/s
