Answer:
t = 2.13 10-10 s
, d = 6.39 cm
Explanation:
For this exercise we use the definition of refractive index
n = c / v
Where n is the refraction index, c the speed of light and v the speed in the material medium.
The refractive indices of ice and crown glass are 1.13 and 1.52, respectively, therefore the speed of the beam in the material medium is
v = c / n
As the beam strikes perpendicularly, the beam path is equal to the distance of the leaves, there is no refraction, so we can use the uniform motion relationships
v = d / t
t = d / v
t = d n / c
Let's look for the times on each sheet
Ice
t₁ = 1.4 10⁻² 1.31 / 3 10⁸
t₁ = 0.6113 10⁻¹⁰ s
Crown glass (BK7)
t₂ = 3.0 10⁻² 1.52 / 3.0 10⁸
t₂ = 1.52 10⁻¹⁰ s
Time is a scalar therefore it is additive
t = t₁ + t₂
t = (0.6113 + 1.52) 10⁻¹⁰
t = 2.13 10-10 s
The distance traveled by this time in a vacuum would be
d = c t
d = 3 10⁸ 2.13 10⁻¹⁰
d = 6.39 10⁻² m
d = 6.39 cm
semiconductors ... silicon, germanium etc ...
Answer:
General Formulas and Concepts:
<u>Physics 1 - Newton's Law of Motion</u>
- Gravity: 9.8 m/s²
- Static/Kinetic Friction Formula:
- Free Body Diagram
Explanation:
<u>Step 1: Define Variables</u>
<u>Step 2: Find Normal Force</u>
<em>See Attachment for FBD.</em>
- Substitute: Fg = (12 kg)(9.8 m/s²)
- Multiply: Fg = 117.6 N
- Redefine: Fn = 117.6 N
<u>Step 3: Find Kinetic Friction</u>
- Substitute: Fs = (117.6 N)(0.6)
- Multiply: Fs = 70.56 N
P = m v
250 = m5
250 = 5m
m = 50 Kg
Option C
If their average velocity is 55 mph Northwest, they won't arrive in Santa Fe.
First of all, the straight-line distance from Houston to Santa Fe is only 740 miles. And if the headed out from Houston going northwest and maintained that heading, then they passed about 135 miles north of Santa Fe.
Let's just work with SPEED, OK ?
If they drove 881 miles at an average speed of 55 mi/hr, then
the trip took them
(881 mi) x (hr / 55 mi) = 16.018 hours (16 hrs 1 min)