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xxMikexx [17]
3 years ago
14

The current theory of the structure of the

Physics
1 answer:
myrzilka [38]3 years ago
4 0

Answer:

hiiiiiiiiiiii

Explanation:

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What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters?
lana66690 [7]

<em><u>Answer:</u></em>

The new length is 1.20138 m

<em><u>Explanation:</u></em>

<u>1- We get the increase in length:</u>

The old length = 1.2 m

The coefficient of expansion of of aluminum is 23 * 10⁻⁶ /K.

The old temperature is 15°C.

The new temperature is 65°C

The increase in length= old length * coefficient of expansion *change in temperature

The increase in length = 1.2 * 23 * 10⁻⁶ * (65-15)

The increase in length = 0.00138 m

<u>2- getting the new length:</u>

new length = old length + increase in length

new length = 1.2 + 0.00138

new length = 1.20138 m

Hope this helps :)

3 0
3 years ago
Read 2 more answers
An object moves in a straight line and is speeding up. Which one of the following statements is true?
kaheart [24]
I could be wrong on this one, but I think the answer is the first option, The net force on the object is in the direction of motion.

Friction can be acting on the object, but if the other force(s) that are acting on the object are greater, I think the object will still be able to accelerate.

The third option can't be true, according to Newton's second law (f=ma). If there were no forces acting on the object, or if the net forces cancelled each other out, the object wouldn't be accelerating unless its mass was changing.

I suppose the last option is also technically true, but the first is more specific..?
3 0
3 years ago
La magnitud del campo eléctrico E entre dos placas paralelas es 8kN/C. Las placas están separadas 0.03m. ?Cuánto trabajo realiza
olchik [2.2K]
<h2>Respuesta:</h2>

Si tenemos dos placas paralelas y un campo electrico de 8kN/C entre ellas y además conocemos la separación de estas placas que es igual a 0.03m. Entonces, cuando una carga se mueve de un punto a a un punto b el trabajo que es realizado  sobre la carga por el campo eléctrico viene dado por la siguiente ecuación:

W_{a \rightarrow b}=q_{0}E(y_{a}-y_{b})

Dado que la carga se mueve desde la placa negativa hasta la placa positiva, entonces:

y_{a}

W_{a \rightarrow b}=q_{0}E(-d) \\ \\ W_{a \rightarrow b}=-q_{0}Ed

Finalmente, sustituyendo:

W_{a \rightarrow b}=-(-3 \times 10^{-6})(8\times 10^{3})(0.03) \\ \\ \boxed{W_{a \rightarrow b}=7.2\times 10^{-4}J}

7 0
3 years ago
Which represents a type of electromagnetic wave? A. slinky wave B. jump rope wave C. shortwave radio waves D. ocean wave
Dahasolnce [82]
The only item on that list that's an electromagnetic wave
is C). shortwave radio waves.
8 0
3 years ago
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All EM waves (light waves) travel at the same speed through the vacuum of space. If the different types of waves are distinguish
Rudiy27
I don’t know the answer i just need the points
6 0
3 years ago
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