An amplifier has a power output of 100 mw when the input power is 0.1 mw. the amplifier gain db.
a. 10
b. 20
c. 30
d. 40

The amplifier gain is 30 dB.

(c) is correct option.

Explanation:

Given that,

Output power = 100 mW

Input power = 0.1 mW

We need to calculate the amplifier gain in dB

Using formula of power gain

....(I)

We calculate the

Now, put the value of   in equation (I)

Hence, The amplifier gain is 30 dB.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.