Answer
A. Half elementary charge
Explanation:
Answer:
u=78.4m/s
Explanation:
A ball is thrown vertically upward, which is the positive direction.A little later it returns to its point of release.The ball is in the air for a total time of 8.0 s.What is its initial velocity? Neglect air resistance
from newtons equation of motion
s=ut
v=u+at
v=0 because at maximum height reached by the ball the ball stops moving
0=u-9.8*8
u=78.4m/s
u=initial velocity
v=final velocity
a=acceleration due to gravity, 9.81m/s^2
t=time it takes in air
s= distance to get to the maximum before returning
<span>The waste products of combustion leave the internal combustion engine through the: B) Exhaust valve</span>
Answer:
a) 1.57, 1.61
B 1.91x10^8m/s , 1.86 x 10^8m/s
Explanation:
Ok we know that refractive index is given as = sin i/ sin r
And i is the angle of incidence in the air and r is angle of refraction in the glass,
So we can sa y
for red light n = sin75/sin38.1 = 1.57
and for violet, n =sin75/sin36.7 = 1.61
So
(a) 1.57, 1.61
(b) we know that
Refractive index n = c/v,
where c is speed off light in air and v is speed of light in glass,
So , v = c/n
for red light v = c/1.57 = 1.91 x 10^8 m/s
and for violet light, v = c/1.61 =
1.86 x 10^8 m/s