Explanation:
The angle of incidence is always smaller than the angle of refraction
Answer:
Explanation:
We can subtract directly the corresponding components and check using the parallelogram rule.
Explanation:
Have a look:
enter image source here
Where, graphically, I used the fact that:
→
A
−
→
B
=
→
A
+
(
−
→
B
)
For the magnitude we use Pythagoras (with the components) to get:
∣
∣
∣
→
A
−
→
B
∣
∣
∣
=
√
(
−
1
)
2
+
(
5
)
2
=
√
1
+
25
=
√
26
≈
5.1
For the direction I can see that will be
90
∘
from the
x
axis up to the
y
axis, plus the little bit passed the
y
axis given as:
θ
=
arctan
(
1
5
)
=
11.3
∘
giving in total: angle
=
90
∘
+
11.3
∘
=
101.3
∘
Answer:
Poynting vector,
Explanation:
It is given that, The electric and magnetic fields of an electromagnetic wave are given by :
Electric field,
Magnetic field,
We need to find the Poynting vector for this wave. the Poynting vector is given by :
So, the Poynting vector for this wave is . Hence, this is the required solution.
Answer:
Increasing speed.
Explanation:
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
In this scenario, an object moves with a positive acceleration. Thus, the object is moving with an increasing speed and as such it has acceleration in the same direction as its velocity with respect to time.
Answer:
Explanation:
Given data
Initial temperature of air Ti=300 K
Vf (final volume of air)=2Vi (initial volume of air )
To find
Final temperature
Solution
Since no energy is lost by thermal conduction during the process we categorize this process as an adiabatic one.Hence we apply;
Where air is predominantly a diatomic gas Y=1.4m
Substitute the given values
So