Answer:
El área final de la placa de aluminio es 14.971 metros cuadrados.
Explanation:
Para pequeñas deformaciones, la expresión para la dilatación de área es la siguiente:
[tex]A_{f} = A_{o} \cdot [1+2\cdot \alpha \cdot (T_{f}-T_{o})][/tex] (1)
Donde:
[tex]A_{o}[/tex], [tex]A_{f}[/tex] - Áreas inicial y final de la placa, medidas en metros cuadrados.
[tex]\alpha[/tex] - Coeficiente de expansión lineal, medido en [tex]\frac{1}{K}[/tex].
[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Temperaturas inicial y final de la placa, medidas en Kelvin.
Si sabemos que [tex]A_{o} = 15\,m^{2}[/tex], [tex]\alpha = 23\times 10^{-6}\,\frac{1}{K}[/tex], [tex]T_{o} = 329\,K[/tex] y [tex]T_{f} = 288\,K[/tex], entonces el área final de la placa es:
[tex]A_{f} = (15\,m^{2})\cdot \left[1+2\cdot \left(23\times 10^{-6}\,\frac{1}{K} \right)\cdot (288\,K-329\,K)\right][/tex]
[tex]A_{f} = 14.971\,m^{2}[/tex]
El área final de la placa de aluminio es 14.971 metros cuadrados.
A student is using graphs to model the relationship between frequency and wavelength in light waves produced by a source that is changing color over time. The student had completed the graph for frequency shown below. Which graph should the student use for wavelength change during this same period?
A passive continental margin has a ____, while an active margin does not.
O A. continental rise
O B. continental slope
O C. continental duct
O D. continental shelf
A passive continental margin has a continental rise, while an active margin does not. Therefore, option A is correct.
What is passive continental margin?Where there is no plate border to mark the transition from land to sea, this is known as a passive continental margin.
A good example is the east coast of the United States, where the plate boundary is a distance from the shore along the mid-Atlantic ridge. Little geological activity occurs along passive borders.
Volcanoes, mountain belts, and earthquakes all identify active margins. They lack a continental uplift and an abyssal plain, in contrast to passive margins.
The Pacific and North American Plate boundaries are visible along the west coast of the United States, which is an example of an active margin. Where there is no plate border to mark the transition from land to sea, this is known as a passive continental margin.
Thus, option A is correct.
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Who may perform a post-exposure medical evaluation?
A) A licensed physician
B) An LPN
C) A physician's assistant
D) Your employer
Answer:a licensed physician
Explanation: taking the osha test now.
A licensed physician is the one to carry out a post-exposure medical evaluation. (Option A)
Post-Exposure Medical EvaluationPost-exposure Medical Evaluation is any medical evaluation started after exposure to a pathogen in order to prevent the infection from occurring.
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A horizontal net force F is exerted on a 2.0 kg object at rest. The object starts at I = 0 m and travels
4.0 m along a horizontal frictionless surface. The net force F as a function of the object's position is
shown below.
Force (N)
40+
30
20-
10+
Position (m)
2
3
4
5
6
7
What is the velocity of the object?
Answer:
It’s 12 m/s
Explanation:
Khan approved
A horizontal net force F is exerted on a 2.0 kg object at rest. The object starts at x = 0 m and travels 4.0 m along a horizontal frictionless surface. The net force F as a function of the object's position x is shown below.
What is the velocity of the object?
Answer: 12 m/s
Which of the following objects have gravitational potential energy?
A) a diver standing on a diving platform.
B) A hockey puck gliding across the ice.
C) an archers bow that is drawn back.
D) A runner waiting on the starting blocks.
Answer:
An archers bow that is drawn back
Answer:
A)a diver standing on a diving platform.
REQUESTS/REQUIERMENTS:
BRAINLIEST PLEASE
Displacement vectors of 1m north, 3 m south, 6 m north, and 4 m south
combine to a total displacement of *
Answer:
zero
it ends at the starting point
Explanation:
What is the wavelength of these waves?
pls help
How could the speed of a car be determined?
Answer:
try the formula v=s/t
v= velocity
s= speed
t=time
Explanation:
How long will it take a rocket traveling at 8km/s to reach 20 km?
Answer:
2.5 seconds
Explanation:
20:8= 2.5 seconds
have a nice day! (^o^)
Answer:
2.5 seconds
Explanation:
20 ÷ 8 = 2.5
That's it.
If three balls of different materials were dropped at the same time from the same height, which would hit the ground first? (Assume there is no
air resistance.)
Answer:
It depends of the mass and weight of each of the materials
Explanation:
The smallest particle of an element; made of electrons, protons, and neutrons
Answer:
atom
Explanation:
What characteristic of sound is most closely related to its frequency?
A. Quality
B. Amplitude
C. Speed
D. Pitch
Answer:
The loudness of sound is most closely related to
The pressure within a sound wave determines the loudness of the sound. In this lesson, learn how to calculate the sound pressure level of a sound wave and what this measurement represents.
Explanation:
Help with this question please :>
Answer: A if thats not right its C
Explanation:
Answer: It's c
Explanation: C
What type of electromagnetic radiation is used by mobile phones?
Cell phones emit radiofrequency radiation ( radio waves ), a form of non-ionizing radiation, from their antennas
Brainiest if correct? I'd appreciate it SM :D
Answer:
radio frequency (RF)
The type of radiation emitted by cell phones is also referred to as radio frequency (RF) energy
Explanation:
hope this helps have a good rest of your night :) ❤
Help
Why do you think that if you drop two balls, exactly two balls rise on the other side at a
similar speed?
Answer:
It conserves both energy and momentum in the collision at the same time. By design, when the balls collide the strings that hold them up are vertical (assuming balls are only swung from one side).
Explanation:
Hope This Helps!!
A car accelerates from 20.0 m/s to 28.0 m/s over a distance of 50.0 m. What is the car’s acceleration?
Answer:
Explanation:
[tex]V^2=V^2_o+2a(x_f-x_i)[/tex]
[tex]28^2=20^2+2a(50)\\784=400+100a\\384=100a\\a=3.84m/s^2[/tex]
Question 7 of 10
In terms of a story's ending, what is a "twist"?
A. To have the characters become lost on a winding road or path
B. To weave together different fictional elements in a specific pattern
C. To write an ending that is too random for the reader to be satisfied
D. An event that a reader probably wouldn't have been able to predict
SUBMIT
Answer:
D
Explanation:
a twist is an event that a reader probably wouldn't have been able to predict
Science: Work, Power and Efficiency Practice Problems:
Work = Force x Distance
Power = Work / Time
Percent Efficiency = Work
Output/Work Input x 100
Step 1: Write the equation
Step 2: Substitute with units
Step 3: Solve with units
rounding to the nearest tenth
1) It took 639 Newtons to push a table 21 meters. How much work was done?
Answer:
I believe it is 13,419 joules.
Explanation:
I could be very wrong, please fact check me
what is the standard unit of velocity
Answer:
Explanation:
Meters per second
Answer:
m/s (meters per second)
Explanation:
Identify and define Four causes of infections diseases
Answer:
Bacteria
Fungi
Viruses
Parasites
Explain What the core muscles do and why it's important to have a strong set of core muscles.
Answer: Core muscles protect the spine and keeps it stabilized. Also they can help control movements such as walking and standing. The core helps transfer energy and help us move in different directions. It's important to have a strong set of core muscles.
Explanation:
Answer:
The core muscles stabilize and protect the spine. They help control all movements and make it possible for us humans to walk and stand up right. The core helps us transfer energy, shift our body weight and reach/move in different directions. It is important to have a strong set of core muscles because it makes everyday activities easier.
Explanation:
hii please help i’ll give brainliest if you give a correct answer please please hurry it’s timed
Answer:
A
Explanation:
You can rule out c and d since they make no sense but i would say a makes more since than b since your sitting on the chair your putting force on it
How are deceleration and acceleration related?
Answer:
Deceleration is reverse of acceleration
Is chochlate milk a element
Answer:
no
Explanation:
it's a graph
Answer:
It specifically is not a element but it has plenty of elements in it
Explanation:
PLEASE PLEASE
HELP!!!!!!!!
Answer:
b 8W
Explanation:
i dont know u find out
Answer:
B. 8 I believe that this is the answer
20 points**plz help
Explain the effect of increasing the number or size of the magnets on the speed of a motor.
Explanation:
the speed of the motor can be increased by increasing the strength magnetic field increasing the current flowing through the coil.
Mikel runs with a speed of 3 m/s for 45 seconds. How far does mikel run?
Answer:
d = s • t
3m/s • 45s and and the seconds will cancel out.
135 meters
Answer:
velocity=3m/s
time=45sec
displacement=?
Explanation:
we have
velocity=displacement/time
3m/s=displacement/45
displacement=3×45=135m
Mikel runs 135m far.
which term describes when a substance is changed from a liquid to a gas
Answer:
vasporisation
Explanation:
process used to change liquid to gass
Answer:
I believe it's Evaportation or another word would be Vaporisation.
Explanation:
hope this helps! ^^
Can someone help me with this question
Answer:
extrusive igneous rock
The diagram below shows what can happen when light strikes a material.
red light
green
blue light
b
blue glass
red light
X
E
green light
blue light
O Diagram a.
O Diagram b.
O Diagram c.
O Diagram d.
Answer:
I don't understand the question
Explanation: