Answer:
El área de la placa es aproximadamente 5102.752 centímetros cuadrados.
Explanation:
Asumamos que el cambio dimensional como consecuencia de la temperatura es pequeña, entonces podemos estimar el área de la placa de cobre en función de la temperatura mediante la siguiente aproximación:
[tex]A_{f} = w\cdot l \cdot [1 + 2\cdot \alpha\cdot (T_{f}-T_{o})][/tex] (1)
Donde:
[tex]w[/tex] - Ancho de la placa, en centímetros.
[tex]l[/tex] - Longitud de la placa, en centímetros.
[tex]\alpha[/tex] - Coeficiente de dilatación, en [tex]\frac{1}{^{\circ}C}[/tex].
[tex]T_{o}[/tex] - Temperatura inicial, en grados Celsius.
[tex]T_{f}[/tex] - Temperatura final, en grados Celsius.
Si sabemos que [tex]w = 65\,cm[/tex], [tex]l = 78\,cm[/tex], [tex]\alpha = 17\times 10^{-6}\,\frac{1}{^{\circ}C}[/tex], [tex]T_{o} = 20\,^{\circ}C[/tex] and [tex]T_{f} = 400\,^{\circ}C[/tex], entonces el área de la placa a la temperatura final:
[tex]A_{f} = (65\,cm)\cdot (78\,cm)\cdot \left[1+\left(17\times 10^{-6}\,\frac{1}{^{\circ}C} \right)\cdot (400\,^{\circ}C-20\,^{\circ}C)\right][/tex]
[tex]A_{f} = 5102.752\,cm^{2}[/tex]
El área de la placa es aproximadamente 5102.752 centímetros cuadrados.
How to write about Bar graph in english
Answer:
A bar chart is orientated horizontally, whereas a column chart is arranged vertically. Sometimes “bar chart” refers to both forms. These types of charts are usually used for comparison purposes (unlike line charts, which describe change).
explains this: a light source can emit more than one type of light
Answer:
The electromagnetic spectrum comprise a lot of waves length. Usually, different waves length are called as different lights, and a light source can emit in more than a different wave length, as the sun does, for example. The sun emit the visible light, UV light, infrared, etc.
Explain the difference between the properties of alpha, beta and grammar radiations (6 marks) . pls someone help and make it detailed
How much force is required to bring an acceleration of 1.5 m/s square in 1500 kg car
Answer:
2,250N
Explanation:
Force = mass * acceleration due to gravity
force= 1500 * 1.5
force =2250N
how does Newton's law of motion describe when and how objects move?
Answer:
Newton's laws of motion relate an object's motion to the forces acting on it.Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
Explanation:
The best way to choose the baseball bat that's right for you is by choosing one that is not too long and not too __________.
A. round
B. thin
C. heavy
D. colorful
Answer:
C. Heavy
Explanation:
You need to be able to lift the bat.
An iron rod and a copper rod of equal length are each held by hand at one end, with the other end in the flame from a Bunsen burner. The copper rod becomes too hot to hold much sooner than the iron rod. What does this information tell you about iron and copper?
Answer:
Iron has a higher heat capacity than copper
Explanation:
The heat capacity of a substance is defined as the amount of heat required to raise the temperature of an object by 1°C.
The higher the heat capacity of a substance, the longer the time it takes for the substance to become hot when heated.
Since the copper rod becomes too hot to hold much sooner than the iron rod, it means that iron has a higher heat capacity than copper.
The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.
Answer:
The answer is below
Explanation:
A diver works in the sea on a day when the atmospheric pressure is 101 kPa. The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.
Solution:
Boyles law states that the volume of a given gas is inversely proportional to the pressure exerted by the gas, provided that the temperature is constant.
That is:
P ∝ 1/V; PV = constant
P₁V₁ = P₂V₂
Given that P₁ = initial pressure = 101 kPa, V₁ = initial volume = 1700 L, P₂ = cylinder pressure, V₂ = cylinder volume = 12 L. Hence:
P₁V₁ = P₂V₂
100 kPa * 1700 L = P₂ * 12 L
P₂ = (100 kPa * 1700 L) / 12 L
P₂ = 14308 kPa
the magnificat of image produced by a concave lens is always less than 1. why?
Answer: Concave lens makes the virtual image. So the image distance turns to be negative which also cause the magnification to be negative.
What is the total resistance of a 6 ohm and a 8 ohm resistor connected in series?
(1 Point)
Answer:
Total Resistance in circuit is Fourteen Ohms (14 Ω).
Explanation:
How do we know, if the resistors are connected in series, the total resistance is the sum of all the resistors.
(Important: The total resistance can only be added just when the resistors are connected in series)
Then, total resistance (TR ) is the sum of all resistors (T1 + T2, in this case)
TR = T1 + T2
According to problem data, we have:
TR = 8 Ω + 6 Ω
TR = 14 Ω
║Sincerely, ChizuruChan║
What is the charge of this object?
Answer:
I think neutral
Explanation:
Because it has an equal amount of both positives and negatives, this is my thinking wait for more responses please.
How much power is consumed by the circuit above?
Power is dissipated, not consumed.
This circuit dissipates 4.5 watts.
.
A sample of an ideal gas is contained at initial volume 34 L, temperature 450 K, and pressure 7.7 × 104 Pa. It then is allowed to expand to a volume of 40 L. To calculate the work involved in the expansion, which additional information, if any, must be known about the gas? Assume that known information includes the values of physical constants, such as the ideal-gas constant R.
A.the final pressure of the gas
B.The path of the change from initial to final conditions
C. the final temperature of the gas
Answer:
it have to be a
Explanation:
if a statement is true, select true. if it's false, select false.
3 is false 2 is true and the rest true
Answer;
True, False, False, True, True
Question 2 of 27
A man is trying to drag a small tree that he cut down. If the static coefficient
of friction of the tree on the ground is 0.5 and the tree weighs 670 N, what is
the minimum amount of horizontal force that the man will need to apply so
that the tree will start moving?
A. 670 N
B. 230 N
C. 335 N
D. 465 N
Answer:
Explanation:
Newton's 2nd Law say that F = ma which is the sum of the forces acting on an object is equal to the object's mass times the acceleration at which it is moving. That means that the forces acting on this tree are F which is the Force the man needs to exert to move the tree, and f which is the force the tree is exerting in an effort to stay right where it is. That alters our 2nd Law equation to F - f = ma. BUT if the tree isn't moving, the acceleration is 0, making the whole right side of that equation go to 0. That means that F = f. Phew! Let's do that.
f = μ[tex]F_n[/tex] where f is the frictional force, μ is the coefficient of static friction, and [tex]F_n[/tex] is the weight of the object, which are given as 670 N. Filling in:
f = .5(670) so
f = 335 N (that is not using the rules of significant digits properly, but if you use them properly, the answer is not one of the choices, so...)
C is the one you want.
order the phrases
Using the phrases in the box above, fill in the blank below to put the phrases in the correct order (# 11 - 14) Follow the arrows!
What is an impulse? (select all that apply)
J=Ft
change in momentum
V=m/a
a rash decision
Answer:
change in momentum
Explanation:
using newton's second law,
F = m ( v - u ) / t....
Ft = mv - mu
impulse is either Ft ( product of force applied and the time taken for its action )
or impulse is mv - mu ( change in momentum )
A spring extends by 10cm when a mass of 100g is attached to it. What is the spring constant?
Answer:
10N/m
Explanation:
Using F=kx
F=mg
k=mg/x
k=0.1*10/0.1 (kg*m/s^2)/m
10N/m
After finishing using free weights, the next step is to?
Answer:
g
Explanation:
bhhhhhhjjjhhuydszzzzzzzxz
Which speed have humans not yet travelled?
Answer:
light waves i think
Explanation:
may also be sound waves
Answer: The speed of light.
Explanation:
The speed of light is the fastest in the universe.
power of a crane is 25000 watt calculate the time required by it to lift a load of 6000 kg up tp the height of 20 m
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Comparative Anatomy: Mastery Test
Subm
Which organism is structurally similar to this organism?
Answer:
maybe it is the first one
If you move at 18 m/s towards a 2300 -Hz source that is moving towards you with a ground speed of 30 m/s, what frequency do you hear?
Answer:
The frequency you will hear is 2,639.7 Hz
Explanation:
Given;
source frequency, Fs = 2300 Hz
velocity of the source, Vs = 30 m/s
observed velocity, Vo = 18 m/s
speed of sound in air, V = 343 m/s
Apply Doppler effect, the frequency you will hear is known as observed frequency;
The observed frequency will be greater than the source frequency, since the distance between the source and the observer decreases.
[tex]F_s = F_0(\frac{V- V_0}{V + V_s} )\\\\2300 = F_0 (\frac{343 - 18}{343 + 30} )\\\\2300 = F_0(\frac{325}{373} )\\\\F_0= 2300(\frac{373}{325}) \\\\F_0 = 2,639.7 \ Hz[/tex]
Note: the aim is to increase the observed frequency.
Subtracting the observed speed from the speed of sound for the numerator will ensure an increase in the observed frequency, also adding the source speed to the speed of sound for the denominator will equally ensure an increase in the observed frequency.
What is artificial insemination as used in animal production
Answer:
i hope this helps!
Explanation:
Artificial Insemination (AI) is an Assisted Reproductive Technology (ART) used worldwide to deposit stored semen directly into a cow or heifer's uterus. It is a tool for improving reproductive performance and genetic quality of livestock.
source: https://nwdistrict.ifas.ufl.edu/phag/2020/05/29/tips-for-successful-artificial-insemination-of-cattle/
A wave has a frequency of 34 Hz and a wavelength of 2.0 m. What is the
speed of the wave? Use V= fx.
A. 17 m/s
B. 68 m/s
C. 0.059 m/s
D. 36 m/s
Answer:
v=FX
v=34(2.0)
v=68m/s
3.2.2 Quiz: Energy of Chemical Relons Question 9 of 10 The energy diagram shows the changes in energy during a chemical reaction Which statement best describes the total energy change of the system? Potential energy Reaction progress
The reactants have a higher potential energy and energy is released.
What is the potential energy graph?The potential energy graph shows a plot of the progress of a reaction. The hump on the graph is the activation energy of the reaction.
The statement that best describes the total energy change of the system is that; reactants have a higher potential energy and energy is released.
Learn more about potential energy of a reaction:https://brainly.com/question/15371310
#SPJ1
Which organism is structurally similar to this organism
Answer:
The correct answer is "Common Ancestry." Scientists notice structural similarities between fossils of a land animal and an aquatic organism. They know the similarities are not a result of the two organisms having to adapt to similar environments. The similarities are brought by the common ancestry of the two organisms.
Read more on Brainly - https://brainly.com/sf/question/1115688
Answer: middle one that looks like a bird
Explanation:
En los sistemas que figuran acontinuación,indica de donde te parece que proviene la energía que usan y aclara si sólo utilizan o la que pueden acumular
Answer:
¿Qué sistemas? ¿Hubo otra parte de la pregunta que quizás hayas olvidado hacer?
Explanation:
In english:
(question) In the systems listed below, indicate where you think the energy they use comes from and clarify whether they only use or can accumulate
(answer) What systems? Was there another part of the question you might've forgotten to put?
If a dielectric is inserted bw the plates of a 20 microfarad capacitor, it's capacitance will be
A. Remain same
B. Be doubled
C. Be halved
D. Become zero
(Ans with explanation please)
Answer:
will be doubled
Explanation:
This is because when a dielectric material is inserted between the plates of capacitors the capacitance increases to
c = ke Co .
where ke is called the dielectric constant and Co is the capacitance without a dielectric material
The Kinetic energy of molecules of a gas increases with
Answer:
temperature
Explanation:
suppose a volume of gas is in a container and more heat is applied, the molecules gain kinetic energy and begin to move and collide with each other and the walls of the container
Answer:
kinetic energy increases with rise of temperatures