Ablender takes in 180 j of electrical energy. of the 180 j, 90 j are transformed into kinetic energy, 60 j are transformed into thermal energy, and the rest is transformed into sound. what is the sound energy generated by the blender?
30 j
90 j
150 j
330 j

For this case, the first thing we are going to do is define variables.

We have then:

x: kinetic energy

y: thermal energy

z: sound energy

We know that the sum of the three energies is equal to the electric energy.

We have then:

From here, we clear the energy of the sound:

Substituting values we have:

The sound energy generated by the blender is:

30 J

Answer : 30 J

Explanation :

It is given that,

A blender takes in 180 J of electrical energy.

Energy transformed into kinetic energy is 90 J.

Energy transformed into thermal energy is 60 J.

The electrical energy is transformed into kinetic energy (KE), thermal energy (TE) and sound energy (SE).

So,

Hence, the sound energy generated by the blender is 30 J.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic