Answer:
The angle of refraction of sheet 3 when sheet 1 is on top of it is
Explanation:
From the question we are told that
The angle of incidence is
The angle of refraction angle for sheet 1 is
The angle of refraction for sheet 3 is
According to Snell's law
Where are refractive index of sheet 1 and sheet 2
=>
Also when sheet 3 in on top of sheet 2
substituting for
=>
when sheet 1 in on top of sheet 3
where is the angle of refraction when sheet 1 is on top of sheet 3
substituting for
=>
substituting values
=>
=>
Answer:
Explanation:
Saturn orbital period
p(s)= 29.46years
Average distance
a(s) = 9.54AU
Venus orbital period
p(v) = 0.62 years
a(v) ?
Using Kepler's third law
a³ ∝p²
a³ = kp²
a³/p² = k
Where
a is the distance if planet from sun
T is the period of the planet
Then,
a(Venus)³/p(venus)² = a(saturn)³/p(saturn)²
a(v)³/p(v)² = a(s)³/p(s)²
a(v) ³/ 0.62² = 9.54³/29.46²
a(v) ³/ 0.62² = 1.0004
a(v)³ = 1.0004× 0.62²
a(v)³ = 0.3846
a(v) = cube root(0.3846)
a(v) = 0.727 AU
Answer:
Her average speed is 5 miles per hour.
Explanation:
Average speed is the ratio of total distance travelled in particular time.
The park's pond is 0.5 miles around.
She can swim 20 laps, it means she can swim total = 20 × 0.5
= 10 miles.
Time taken by her to complete the track = 2 hour
Now, Average speed =
=
= 5 miles/hour.