Total hours is 3.35 hours
<u>Explanation:</u>
Given:
convert 3 hours 21 minutes to decimal hours
We know:
1 hour = 60 minutes
and
1 minute = 60 seconds
1 minute = 1 / 60 hours
So,
21 minutes = 
= 0.35 hours
Total hours would be = 3 hours + 0.35 hours
= 3.35 hours
Therefore, total hours is 3.35 hours
Answer:
A
Explanation:
Snell's law states:
n₁ sin θ₁ = n₂ sin θ₂
where n is the index of refraction and θ is the angle of incidence (relative to the normal).
The index of refraction of air is approximately 1. So:
1 sin 30° = 1.52 sin θ
θ ≈ 19°
The energy that substance contain is. B.heat
Wavelength = 1/frequency thus wavelength =1/30000
Answer:
0.079 m or 79 mm
Explanation:
Using the equation of motion
v = √(2as)
Where v is the velocity
a is acceleration = 1400m/s²
s is the distance = 0.55 mm = 0.00055m
Therefore
= √(2 × 1400m/s² × 0.00055 m) = 1.54 m/s
Therefore; initial velocity = 1.54 m/s
Then we use the equation of motion s = v² / 2g
Take g = 9.8 m/s²
Therefore
= (1.54m/s)² / 19.6 m/s²
= 0.079 m or 79 mm
