Answer
given,
Distance for decibel reading
r₁ = 13 m
r₂ = 24 m
When the engineer is at r₁ reading is β₁ = 101 dB
now, Calculating the Intensity at r₁
Using formula
I₀ = 10⁻¹² W/m²
now inserting the given values
I = 0.01258 W/m²
now, calculating power at r₁
P₁ = I₁ A₁
P₁ = 0.01258 x 4 π r²
P₁ = 0.01258 x 4 π x 13²
P₁ = 26.72 W
Answer:
Spatial interference describes the correlation between waves at different points in space.
The two example of spatial interference are as following:
- alphanumeric characters can be easily identified in isolation but difficult to be identified when these characters are surrounded by optotypes because visual acuity will be reduced by crowded conditions that limit resolution at several stages of visual processing.
- Birds are able to identify visual target slowly that are presented at the top than to that same visual target presented at the bottom.
Hence, different waves in a space correlate result into Spatial interference.
Do this type of thing but change it a little bit. This is a conservation of momentum problem. The initial momentum of the system (gun + bullet) is zero, as neither is moving.
There fore, after the gun is fired, the total momentum must still be zero.
m
g
×
v
g
+
m
b
×
v
b
=
0
Inserting what we know:
(
0.025
)
(
210
)
+
(
0.91
)
v
b
=
o
v
b
=
−
(
0.025
)
(
210
)
0.91
=
−
5.8
m
s
The negative sign tells us that the gun travels in a direction opposite to that of the bullet.
Answer:
M V R = constant angular momentum is constant because no forces act in the direction of V
Since M (mass) = constant
V R = constant
The force is directed along the gravitational force vector (towards the center of rotation)
Answer:
C. 97 °F
Explanation:
Given:
Temperature in Celsius is, °C
In order to find the temperature in Fahrenheit, we need to use the relationship between Fahrenheit and Celsius.
Temperature in Fahrenheit is related to the temperature in Celsius and is given as:
Now, plug in 36 for and solve for . This gives,
So, the approximate temperature in Fahrenheit is 97 °F.