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ch4aika [34]
3 years ago
15

Microwaves are sent through a material causing the molecules in the material to twist and vibrate, causing the material to heat

up. What is this twisting and vibration of the molecules creating heat an example of?(1 point)
a macroscopic change creating a macroscopic output

a microscopic change creating a macroscopic output

a macroscopic change creating a microscopic output

a microscopic change creating a microscopic output
Physics
1 answer:
kirill [66]3 years ago
3 0

Answer: The answer is C

Explanation:

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A 1.5m wire carries a 7 A current when a potential difference of 87 V is applied. What is the resistance of the wire?
kramer

Answer:

Ohm's law states that I=V/R (Current=volts divided by resistance). Since we're looking for resistance, we'll rewrite it as R=V/I. Then just plug in the numbers; R=84/9, R= 9 1/3 or 28/3. The resistance of the wire is 9.33... or 9 1/3 ohm's, depending on how you wanna write it.

Hope it helped u if yes mark me BRAINLIEST!

Tysm!

I would appreciate it!

3 0
3 years ago
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Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelen
Marta_Voda [28]

Answer:

a) that laser 1 has the first interference closer to the central maximum

c) Δy = 0.64 m

Explanation:

The interference phenomenon is described by the expression

         d sin θ = m λ

Where d is the separation of the slits, λ the wavelength and m an integer that indicates the order of interference

For the separation of the lines we use trigonometry

        tan θ = sin θ / cos θ = y / x

In interference experiments the angle is very small

          tan θ = sin θ = y / x

         d y / x = m λ

a) and b) We apply the equation to the first laser

          λ = d / 20

          d y / x = m d / 20

          y = m x / 20

          y = 1 4.80 / 20

          y = 0.24 m

The second laser

        λ = d / 15

          d y / x = m d / 15

          y = m x / 15

          y = 0.32 m

We can see that laser 1 has the first interference closer to the central maximum

c) laser 1

They ask us for the second maximum m = 2

            y₂ = 2 4.8 / 20

            y₂ = 0.48 m

For laser 2 they ask us for the third minimum m = 3

In this case to have a minimum we must add half wavelength

         y₃ = (m + ½) x / 15

         m = 3

         y₃ = (3 + ½) 4.8 / 15

         y₃ = 1.12 m

        Δy = 1.12 - 0.48

        Δy = 0.64 m

4 0
3 years ago
How does a simple machine facilitate our work​
marta [7]

Answer:

Simple machines are useful because they reduce effort needed for people to perform tasks beyond their normal capabilities.

Explanation:

6 0
3 years ago
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An airplane is heading due north. It experiences a crosswind in the westerly direction. What is the direction of travel for the
Sergeeva-Olga [200]
The direction is something between west and north. That is, a heading between 270 and 360. The exact direction depends on the airplane's airspeed and the wind speed.
6 0
3 years ago
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Why would an asteroid have a difficult time of holding a probe or person?
babymother [125]

The asteroid's mass is so small that it has a much smaller acceleration
due to gravity than Earth has.  That means that things weigh very very little
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As an extreme example:  You know how when you walk, you naturally rise up
on the toes of one foot while you reach out with the other one to take a step ? 
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like a golf ball. Or it might even exceed escape velocity and you'd sail up off
of the asteroid and never come back down to it. 


5 0
3 years ago
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