Answer:
12 m/s
Explanation:
Given data
Mass m= 1500kg
intitial velocity u= 20m/s
force F= 6000N
time t= 2 seconds
Required
The final velocity v
From
Ft= mΔv
Ft= m(u-v)
substitute
6000*2= 1500(20-v)
solve for v
12000= 30000- 1500v
collect like terms
12000-30000= -1500v
-18000= -1500v
divide both sides by -1500v
v= 18000/1500
v=12 m/s
Hence the velccity is 12 m/s
Answer:
a) 7.02 W/m²
b) 1.53 J
Explanation:
Given
Amplitude of the electric wave, = 72.7 V/m
Area of flow, A = 0.0211 m²
Time taken, t = 10.3 s
To calculate the Intensity, S. We use the formula
I = E(rms)² / (cμ), where
E(rms) = E / √2 = 72.7 / √2
E(rms) = 72.7 / 1.4142
E(rms) = 51.41
c = 2.99*10^8
μ = 1.26*10^-6
I = 51.41² / [(2.99*10^8) (1.26 x 10^-6)]
I = 2642.99 / 376.74
I = 7.02 W/m²
U = energy = IAt
U = (7.02) * (0.0211) (10.3) J = 1.53 J
Answer:
the waves will appear horizontally on the florescent screen because the y-plates have been removed
It appears to be a <span>spiral shape. </span>
Answer:
its because static electricity my guy
Explanation:
