Explanation:
It is given that,
The signal to a speaker causes 0.5 amps of current, 
The signal level is increased to 2.5 amps, 
We need to find the gain to the nearest decibel. The decibel gain formula of the speaker is given by :
db = 13.97 db
or
db = 14 db
So, the gain pf the speaker is 14 db. Hence, this is the required solution.
Answer:
7.5 × 10^3 m/s^2
Explanation:
use the formula that does not have v in it to solve for acceleration.
From the question, The kinetic energy of the fired arrow is equal to the work done by the bale of hale in stopping the arrow.
We make use of the following formula
mv²/2 = F'd................... Equation 1
Where
- m = mass of the arrow
- v = velocity of the arrow
- F' = average stopping force acting on the arrow
- d = distance of penetration
Make F' the subject of the equation
F' = mv²/2d.................. Equation 2
From the question,
Given:
- m = 20 g = 0.02 kg
- v = 60 m/s
- d = 40 cm = 0.4 m
Substitute these values into equation 2
Hence, The average stopping force acting on the arrow is 90 N
Learn more about average stooping force here: brainly.com/question/13370981
