True or False?
________________The fact that ocean crust is younger the farther away it is from an ocean ridge supports the theory of plate tectonics
Answer:
true is the answer of the question
Dibuja la gráfica de calentamiento de un kilogramo de plomo que se encuentra inicialmente a 70ºC y pasa a una temperatura final de 2000ºC, sabiendo que su temperatura de fusión es: 327.4ºC y la de ebullición es de 1725ºC
Answer:
Q= m [tex]c_e[/tex] ΔT and Q = m L
Explanation:
For this graph of temperature vs energy (heating) we must use two relations
* for when there is no change of state
Q= m [tex]c_e[/tex] ΔT
* for using there is change of state
Q = m L
the second expression is a consequence of the fact that all the energy supplied is used to change the state of the solid-liquid and liquid-gas system
the energy supplied is the sum of the energy in each interval
divide the system into intervals determined by the state change points
1) from T₀ = 70ºC to T_f = 327.4ºC, sample in solid-liquid state
c_e = 128 J / kg ºC
Q₁ = m c_e (T_f -To)
Q₁=1 128 (327.4 -70)
Q₁ = 3.29 10⁴ J
Q = Q₁ = 3.29 10⁴ J
2) when is it changing from solid to liquid
L = 2.45 10⁴ J / kg
Q2 = 1 2.45 10⁴
Q2 = 2.45 10⁴ J
Q = Q₁ + Q₂
Q = 5.74 10⁴ J
3) from to = 327.4ºC until T_f = 1725ºC, sample in liquid state
in the tables the specific heat of the solid and liquid state is the same
Q3 = m c_e (T_f -To)
Q3 = 1 128 (1725 -327.4)
Q3 = 1.79 10⁵ J
Q = Q₁ + Q₂ + Q₃
Q = (3.29 +2.45 + 17.9) 10⁴ J
Q = 23.64 10⁴ J
4) for when it is changing from the liquid state to the gaseous state
L_v = 8.70 10⁵ J / kg
Q₄ = m L_v
Q₄ = 1 8.70 10⁵
Q₄ = 8.70 10⁵ J
Q = Q₁ + Q₂ + Q₃ + Q₄
Q = (3.29 +5.74 + 17.9+ 87.0) 10⁴ J
Q = 110.64 10⁴ J
5) from To = 1725ºC to T_f = 2000ºC, sample in gaseous state
Q₅ = m c_e ΔT
Q₅ = 1 128 (2000 -1725)
Q₅ = 3.52 10⁴ J
Q = Q₁ + Q₂ + Q₃ + Q₄ + Q₅
Q = 114.16 104 J
the following table shows the points to be plotted
Energy (10⁴ J) Temperature (ºC)
0 70
3.29 327.4
5.74 327.4
23.64 1725
110.64 1725
114.16 2000
In the attachment we can see a graph of Temperature versus energy supplied
how many different plant and animal species can be found in tropical rainforests
PLEASE ANSWER BY TODAY!
A, A couple hundred
B, 100 thousand.
C, 10 thousand.
D, Millions.
Answer:
Correct answer is B.
Explanation:
The world's most ecologically diverse terrestrial ecosystems are tropical rainforests. The Amazon rainforest is the largest tropical rainforest on the planet. Around 40,000 plant species, approximately 1,300 bird species, 3,000 fish species, 427 animal species, and 2.5 million insect species call it home.In total around 100 thousand different plant and animal species can be found in tropical rainforests.
Learn more about species here:
https://brainly.com/question/23445324
#SPJ2
que tipo de onda son los rayos gamma
Answer:
onda electromagnética
Un circuito que contiene una batería de 6.0 V se conecta con un resistor de 81.0 Ω. Si después de media hora el voltaje de la batería disminuye a 4.5 V, cómo cambia la corriente en el circuito respecto al principio
Answer:
AI = 0.019 A
Explanation:
The computation of the current change and the same compared to the staring is shown below;
I = v ÷ R
= 5v ÷ 81.0
I = 0.074 A
Now
I = v ÷ r
= 6v ÷ 81.0
I = 0.055A
Now
I = 0.074A - 0.055A
AI = 0.019 A
The same would be considered
Which of the following situations would have the fastest speed?
Sound in a vacuum
Light in a vacuum
Sound in a solid
Light in a solid
sound in vacuum
Explanation:
because as u turn a vacuum on it make noise instant when u make sound from a solid object it takes a while to do thing starting slow then going fast in different objects
Which activities will help improve your flexibility? A. Yoga B. Dance C. Pilates D. All of the above
Answer: I believe that the answer is D.
Explanation:
Hope this helps and have a great day! :)
Answer:
D) all of the above
Explanation:
Which is true according to the law of conservation of energy?
ОА.
In a closed system, the total amount of energy in the universe keeps on changing
The supply of energy is limited, so it is essential to conserve it.
OB.
OC.
In a closed system, energy can be created and destroyed.
0In a closed system, energy cannot be used faster than it is created
O E.
In a closed system, the total energy always remains constant OD
Answer: Last option (total energy always remains constant)
Explanation:
The Law of Conservation basically states that energy cannot be created or destroyed. Only changed from one form to another (potential, kinetic, chemical, etc.) so it makes sense that the net energy is unchanging.
acentripetal = var
1). A car goes around a curve at 20 m/s. If the radius of the curve is 25 m, what is
the centripetal acceleration of the car?
1. Picture
2. Knowns/Unknowns:
4. Substitution
E
25.0m
W
S
6. Units
3. Formula
5. Solution
anotant speed of 8 m/s in a vertical circle of
Answer:
Centripetal acceleration = 16 m/s²
Explanation:
Given the following data;
Velocity = 20 m/s
Radius, r = 25 m
To find the centripetal acceleration;
Mathematically, centripetal acceleration is given by the formula;
Centripetal acceleration = velocity²/radius
Centripetal acceleration = 20²/25
Centripetal acceleration = 400/25
Centripetal acceleration = 16 m/s²
What is the wave length of the instruments playing at this frequency if the speed of sound is 342m/s
Answer:
6.84m
Explanation:
The question you asked didn't specify the frequency of the instrument, so I'm going to assume for the question sake.
For the question, we will use the formula
λ = V/F, where
λ = the wavelength we're looking for
V = Velocity of the sound
F = frequency of sound.
Assuming that the frequency of the instrument is 50Hz.
λ = 342/50
λ = 6.84 m
What kind of energy was used to move the toy car?
Answer:
kinetic energy
Explanation:
Motors change electrical energy into kinetic energy. The spinning movement of the motor is used to do work, for example, the wheels on a toy car.
Answer:
hope this works
Explanation:
Kinetic energy is defined as the energy of a moving object.
A thrown football, a speeding automobile, a marathon runner, or a rock falling from a cliff, are examples of objects that have kinetic energy.
The low point of a transverse wave is called a
crest
trough
rarefaction
compression
If we want to reach the planet PSR B1620-26 b, explain why we will need to make some big “wrinkle in time” discoveries or find ways to live much, much longer?
Answer:
Given the information that PSR B1620-26 b is the oldest planet in the Milky Way, it is estimated to be about 13 billion years old, the planet is approximately 12,390 light-years away from Earth, this means that it would take 460,908,000 years to arrive at the ancient planet. If we want to reach this planet, we are going to need to make some gig “wrinkle in time” discoveries, or find ways to live much longer, considering that the current lifespan of humans is only 79 years.
q=mcAt
Calculate the amount of heat gained by 114.32 grams of water at 14.85C raised to 18.0C. The heat capacity of water is 4186J/kgC.
Answer:
1.51 × 10⁶ kJ
General Formulas and Concepts:
Stoichiometry
Using Dimensional AnalysisThermochemistry
Specific Heat Formula: q = mcΔT
q is heat (in J)m is mass (in g)c is specific heat formula (in J/g °C)ΔT is change in temperature (in °C)Explanation:
Step 1: Define
[Given] m = 114.32 g
[Given] c = 4186 J/kg °C
[Given] ΔT = 18.0 °C - 14.85 °C = 3.15 °C
[Solve] q
Step 2: Convert Pt. 1
1 kg = 1000 g
[tex]\displaystyle 4186 \ J/kg \ ^\circ C(\frac{1000 \ g}{1 \ kg}) = 4186000 \ J/g \ ^\circ C[/tex]
Step 3: Solve
Substitute in variables [Specific Heat Formula]: q = (114.32 g)(418600 J/g °C)(3.15 °C)Multiply: q = (4.78544 × 10⁸ J/°C)(3.15 °C)Multiply: q = 1.50741 × 10⁹ JStep 4: Convert Pt. 2
1000 J = 1 kJ
[tex]\displaystyle 1.50741 \cdot 10^9 \ J(\frac{1 \ kJ}{1000 \ J}) = 1.50741 \cdot 10^6 \ kJ[/tex]
Step 5: Check
Follow sig fig rules and round. We are given 3 sig figs as our lowest.
1.50741 × 10⁶ kJ ≈ 1.51 × 10⁶ kJ
The______is the particle in the nucleus with a positive charge.
Answer here
Answer:
proton proton proton proton
According to the law of reflection, what is the angle of incidence?
It is the angle the incident ray makes with a line drawn perpendicular to the viewer.
It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface.
It is the angle the incident ray makes with a line drawn parallel to the reflecting surface.
Answer:
It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface
Two resistors, one with 7.00 Ω of resistance and the other with 11.00 Ω of resistance, are connected in series to a 9.00 V battery. How much power is dissipated by these two resistors?
Answer:
4.5 W
Explanation:
Applying,
P = V²/(R₁+R₂).................. Equation 1
Where P = Power, V = Voltage, R₁ and R₂ = values of the two resistor.
From the question,
Given: V = 9.00 V, R₁ = 7.00 Ω, R₂ = 11.00 Ω
Substitute these values into equation 1
P = 9²/(7+11)
P = 81/(18)
P = 4.5 Watt.
Hence the power dessipated by the two resistors is 4.5 watt
Which of the following is a property of a mechanical wave?
Amplitude
Weight
Incidence
Color
the answer is amplitude
True or False. Can Metalloids conduct electricity under certain conditions?
Answer:
Conduction: Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semi-conductors. Luster: Silicon for example appears lustrous, but is not malleable or ductile (it is brittle - a characteristic of some nonmetals).
Explanation:
Can work ever be negative?
A)Yes, when force is negative
B)Yes, when displacement is negative
C)Yes, when cos(e) is negative
D)No, work can never be negative
Answer:
B yes when displacement is negative
How might variation in the color of beetles help them survive ?
Answer:
they can blend in with their suroundings
Explanation:
Find the height of a cylinder with a volume of 220inand a radius of 3 inches. Round
your answer to the nearest hundredth.
07.78 inches
6.93 inches
5.00 inches
9.84 inches
[tex]\huge{ \mathcal{ \underline{ Answer} \: \: ✓ }}[/tex]
Given :
volume = 220 in³radius = 3 inSolution :
[tex] \large\boxed{ \mathrm{volume = \pi {r}^{2}h }}[/tex]
[tex]220 = \dfrac{22}{7} \times 3 \times 3 \times h[/tex][tex] \dfrac{220 \times 7}{22 \times 3 \times 3} = h[/tex][tex] \dfrac{10 \times 7}{3 \times 3} = h[/tex][tex]h = \dfrac{70}{9} [/tex][tex] \boxed{h \: = 7.78 \: \: in}[/tex]_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Answer:
0.078 inches
Explanation:
The volume of a cylinder is [tex]V=\pi r^{2} h[/tex]. [tex]r[/tex] is the radius of the cylinder, [tex]h[/tex] is the height of the cylinder, and [tex]V[/tex] is the total volume.We can divide both sides by [tex]9\pi[/tex] to isolate the height. We now have [tex]\frac{220}{9\pi }=h[/tex].We can plug in [tex]220[/tex] for the value of [tex]V[/tex], and insert 3 as [tex]r[/tex]. Now, we have [tex]220 = \pi (3^2)(h)[/tex].We can simplify the right side by finding the value of [tex]3^2[/tex], which is [tex]3*3[/tex], or [tex]9[/tex]. We now have [tex]220 = 9\pi h[/tex].Divide both sides by [tex]9\pi[/tex] so we can isolate the height! We now have [tex]\frac{220}{9\pi }=h[/tex].It would be best to use a calculator at this point. Plug the above equation into a calculator; otherwise, replace [tex]\pi[/tex] with [tex]3.14[/tex] and simplify the fraction. You should get about [tex]07.7809...[/tex] which we can round to the nearest hundredths (since this is Geometry, I am assuming you know how to round).Our final answer is [tex]07.78[/tex] inches.Hopefully this was of use!
If one light bulb is removed from a parallel circuit with three bulbs, the brightness of the other bulbs will decrease.
Please select the best answer from the choices provided
T
F
1. When energy is transformed from one form to another it is called
A. transformation of energy
B. conservation of energy
C. consumed energy
D. wasted enenergy
Answer:
A)
Explanation:
Energy transformation is when energy changes from one form to another.
The elements neon and argon are not reactive
a crane lifts a 450kg concrete to the top of a 50m building in 5s.assuming g=10m/s²,calculate a,the potential energy if the concrete
Answer:
The answer is 225,000Joules
7. What is the force on a 1000 kg elevator that is falling freely under the acceleration of gravity
only (10m/s?)?
sheet of paper and a ball having same mass are dropped from the same height and obviously paper balls faster than a sheet of paper. what conclusion can be drawn from this acticity?
Answer:
In free fall, all items will fall at the same time. You were told that they have the same mass hence g×t which is constant.Much of the pollution in out oceans comes from:
a.) car exhaust
b.) organic pesticides
c.) sewage and industrial waste
d.) fumes and smog
Answer:
c.) sewage and industrial waste
Linus builds an electrical circuit with a battery and with wires that carry the current. As the battery weakens, the current also weakens.
How does this affect the magnetic field around the wires?
The field gets stronger.
The field gets weaker.
The field changes direction.
The field disappears completely.
Answer:
The field gets weaker
Explanation:
I’m taking the test right now, hope this helps!!
Answer:
Linus builds an electrical circuit with a battery and with wires that carry the current. As the battery weakens, the current also weakens.
so, it would be B