The parking brake on a 1000 kg Cadillac has failed, and it is rolling slowly, at 1 mph , toward a group of small children. Seein
1 answer:
You might be interested in
Answer:
β = 114 db
Explanation:
The intensity of sound in decibles is
β = 10 log
in most cases Io is the hearing threshold 1 10-12 W / cm²
let's calculate the intensity of each instrument
I / I₀ = 10 (β / 10)
I = I₀ 10 (β / 10)
trumpet
I1 = 1 10⁻¹² 10 (94/10)
I1 = 2.51 10⁻³ / cm²
Thrombus
I2 = 1 10⁻¹² 10 (107/10)
I2 = 5.01 10-2 W / cm²
low
I3 =1 1-12 (113/10) W/cm²
I3 = 1,995 10-1 W / cm²
when we place the three instruments together their sounds reinforce
I_total = I₁ + I₂ + I₃
I_ttoal = 2.51 10-3 + 5.01 10-2 + 1.995 10-1
I_total = 0.00251 + 0.0501 + 0.1995
I_total = 0.25211 W / cm²
let's bring this amount to the SI system
β = 10 log (0.25211 / 1 10⁻¹²)
β = 114 db
Answer:
The answer to your question is: Ke = 3000 Joules
Explanation:
Data
mass = 15 kg
speed = 20 m/s
Kinetic energy = ?
Equation
Ke = 3000 Joules
Answer: The next 5 steps are.
step 2: Find the magnitude of vectors.
step 3: Calculate 'x' and 'y' components.
step 4: Sum the above obtained vector components.
step 5: Calculate the magnitude of Resultant Vector.
Step 6: Determine the direction of the resultant vector.
Explanation:
Let the two vectors be 'A' and 'B'.
Let A = and B =
It is given that, when solving a two dimensional, multi-charge problem, is to define the vectors.
So, step 1 is to define the vectors A and B.
In step 2, we find the magnitude of the vectors by,
In step 3, we find the components 'x' and 'y'
Then in step 4, we sum the components. Now we get the Resultant vector (R).
In step 5, Calculate the magnitude of 'R' using the above formula to find magnitude.
In step 6, we determine the direction of 'R'.