Estimate the peak electric field inside a 1.2-kW microwave oven under the simplifying approximation that the microwaves propagate as a plane wave through the oven's 700-cm2 cross-sectional area.

The peak electric field is  

Explanation:

From the question we are told that

     The power is  

     The cross-sectional area is  

Generally the average intensity of the  microwave is mathematically represented as

Where   is the speed of light with value  

     and   is the permitivity of free space with value

   also is the peak electric field.

Now making the subject

But this intensity of the  microwave can also be represented mathematically as

substituting values

      ]  

So

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

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.