5. the combustion of a single molecule of methane produces about 10 ev of energy. a methane molecule has a mass of 16 amu. the fission of a uranium-235 atom
produces about 189 mev of energy. based on these numbers, about what mass of methane will produce as much energy as a single gram of uranium-235? (one mel
is equal to one million ev.)
oa 19 grams of methane
ob 304 grams of methane.
o c. 71.4 kilograms of methane
od 1,287 kilograms of methane
Answers
The mass of methane will produce as much energy as a single gram of uranium-235 1,287 kilograms of methane. Option D is correct.
What is uranium?Uranium, with the atomic number 92 and the symbol U in the periodic table, is a weakly radioactive element. One of the heavy metals that may be used as a concentrated energy source is uranium.
Given data;
⇒One mole of U-235 = 235 grams
=> 1 gram of U-235 = 1/235 moles
⇒1 mole of U-235 = 6.023 x 10²³ atoms
The no of atoms is;
=> 1/235 moles of U-235
⇒N = 6.023 x 10²³/235 atoms
⇒N=25.6 x 10²⁰ atoms
If one atom of U-235 gives is 189 x 10⁶ eV energy,25.6 x 10²⁰ atoms of U-235 gives;
=> 25.6 x 10²⁰ atoms of U-235 gives;
E = 25.6 x 10²⁰ x 189 x 10⁶
E= 4.8 x 10²⁹ eV energy
One methane molecule produces;
E = 10 eV of energy
=> To produce 4.8 x 10²⁹ eV energy, no. of molecules required;
= 4.8 x 10²⁸
6.032 x 10²³ molecules of methane = 16 gms
=> 4.8 x 10²⁸ molecules of methane = 16 x 4.8 x 10²⁸/ 6.032 x 10²³ gms
m= 12.75 x 10⁵ gms
m= 1275 kilograms of methane
m≅ 1287 kilograms of methane
1 gram of U-235 has the same amount of energy as 1287 kilograms of methane.
Hence option D is correct,
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Related Questions
PLEASE HELP
-Energy stored in chemicals and ______ when broken apart or rearranged.
-Examples: glow sticks, ___, food, fuel.
Energy
-has the ability to cause ___ or ___ change
-moving ___ and ___ are sources of energy.
Answers
Chemical bonds store energy that is released when broken, causing physical or chemical change. Sources include movement and fuel.
Chemical bonds store energy in molecules, which can be released when they are broken apart or rearranged. This energy can cause physical or chemical changes in the surroundings.
For example, glow sticks release energy in the form of light when the chemicals inside are mixed together.
Food contains stored energy that is released during digestion, providing fuel for the body's metabolic processes.
Fossil fuels such as gasoline store energy from the sun that was captured by plants millions of years ago.
Movement, such as the motion of wind or water, can also be a source of energy.
Overall, energy stored in chemicals plays a crucial role in many aspects of our daily lives.
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When a rocket accelerates through space is there work done?
Answers
is a rare disorder that includes the inability to feel pain.
A. Somatoform pain disorder
B. Congenital analgesia
C. Kinesthesis
D. Anesthesia
Please select the best answer from the choices provided
Ο Ο Ο
B.
D
Answers
The rare disorder that includes the inability to feel pain is called Congenital analgesia. That is option B.
What is Congenital analgesia?Congenital analgesia is defined as ,the name implies, a genetic disorder that rarely occurs which makes one not to be able to feel pain.
It is an autosomal recessive disorder in which there is genetic changes in the PMRD12 gene.
Therefore, the rare disorder that includes the inability to feel pain is called Congenital analgesia.
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"What are the sign and magnitude of a point charge that produces
an electric potential of −5.76 V at a distance of 8.33 mm?"
Answers
The charge that produces electric potential - 5.76 at distance 8.33mm is - 5.33 × 10^{-12} C and the negative sign shows that the charge is negative.
What is electric potential?The electric potential, or voltage, is the difference in potential energy per unit charge between two locations in an electric field.
It can also be defined as the energy that is needed to move a charge against an electric field.
electric potential (V) is expressed as;
V = kq/r
where r is the distance and q is the charge.
k = 9 × 10⁹
V = -5.76
r = 8.33 × 1/1000
Therefore;
-5.76 = 9 × 10⁹ × q/(8.33 × 1/1000)
= -5.76 × 8.33 = 9 × 10⁹ × 1000 × q
q = -47.98/9 × 10⁹ × 10³
q = - 5.33 × 10^{-12} C
The negative sign shows that the charge us a negative charge.
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4) from the plots, determine the short-circuit current corresponding to the same value of field current which produced the rated open-circuit voltage.
Answers
Short circuit current vs field current slope from the curve for If=0.2 and If=0.4.
Slope = (Isc(If=0.4)-Isc(If=0.2))/2
An electric current modern-day is a circulation of charged debris, which include electrons or ions, transferring through an electrical conductor or space. it's miles measured because the net charge of go with the flow of electrical charge thru a floor or into a manipulated volume.
The current flowing in a circuit may be utilized in a diffusion of approaches from producing warmness to inflicting circuits to exchange, or statistics to be stored in an integrated circuit.
There are three simple currents utilized in business healing electric stimulation units: direct cutting-edge, alternating contemporary, and pulsed modern-day.
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When two strands of DNA line up, adenine always pairs up with _____.
guanine
phosphate
thymine
cytosine
Answers
The offspring resulting from sexual reproduction are exactly like their parents.
false
true
Answers
Answer:
false
Explanation:
As both parents contribute half of the new organism's genetic material, the offspring will have traits of both parents, but will not be exactly like either parent
Answer:
False
Explanation:
The only time you end up like your parent is asexual reproduction
a scale reads 246 n when a piece of copper is hanging from it. what does it read (in n) when it is lowered so that the copper is submerged in water?
Answers
The read of a scale when a piece of brass is submerged in water (and its apparent weight) can be determined using the following formula: W App = 242N.
Can you put brass in the water?Brass weakens and lost its zinc component quite quickly when immersed in water, endangering the metal's structural integrity. Due of its incredible endurance, brass is a superb metal for various applications other than those in which it is submerged in water.
brass gets wet, what happens?Brass tarnishes when exposed to moisture, whether from being used in the bath or from perspiration on our bodies. This is a very normal occurrence. Jewelry made of brass metal occasionally develops a darker patina as it ages. A coating of the brass is covered in patina, which is a greenish tint.
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1. If the input force applied to one end of a first-class lever is 8 N, and the fulcrum is located 6 m away from the input force but 3 m away from the output force, what will be the resulting output force?
Answers
The output force was found to be 16N
define force ?
1. The ability to do tasks or bring about physical change; vigour, vigour, or active power: the force of an explosion.
2. a. The application of force to overcome resistance; exertion: hammering a nail with force.
b. The use of force to compel or restrain: a confession that was gained violently.
3. a. The strength or vigour of the intellect, particularly as expressed in writing or speech.
b. Moral fortitude.
c. The ability to influence thought or behaviour; efficacy: the power of reasoned argument.
d. The forces of evil are one that has this ability.
A huge labour force is an organised group of people or other resources that are available for a certain purpose.
The lever's mechanical advantage is defined as the ratio of output force to input force. Another term for the mechanical advantage of the lever is the ratio of input arm distance to output arm distance.
F1=8N
d1=6m
d2=3m
the output force Fo= ?
⇒ Fo/8=6/3
Fo=16N
Therefore the output force was found to be 16N
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at+waht+temperature+must+you+run+this+reaction+to+achieve+97%
Answers
Temperature is the degree of hotness or coldness of an object or substance. The SI unit of temperature is Kelvin."97%": The question suggests that a reaction must be run at a specific temperature to achieve 97% yield or completion. Yield refers to the amount of product obtained from a reaction.
To achieve 97% yield or completion, the reaction must be run at a specific temperature. Temperature plays an essential role in chemical reactions since it affects the rate of reaction, activation energy, and equilibrium. The temperature at which a reaction runs optimally, producing the most product, is known as the reaction's optimum temperature. As a result, the temperature must be controlled during a chemical reaction.To achieve 97%, the reaction must be run at a specific temperature.
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An example of a transverse wave is
A. light
B. sound
C. matter
D. none of the above
Answers
Answer:
A light
Explanation:
Answer:
y=2x+b-4 with equals an intercept to end up with the answer if you move 5 feet north at 465 degrees run
What evidence suggests that Enceladus has ongoing geological activity?
A) Voyager 2 photographed liquid nitrogen geysers 10 kilometers tall.
B) Lack of impact craters on much of its surface, evidence of ice flows from possible volcanic activity, and geysers that supply material for the E-ring.
C) Voyager 1 showed sulfur eruptions all over its pizza-pie colored surface.
D) Enceladus is located within Saturn's Roche limit, and ready to blow up.
E) Enceladus undergoes severe tidal stresses from its resonance with Titan.
Answers
The lack of impact craters, evidence of ice flows, and geysers supplying material for the E-ring suggest ongoing geological activity on Enceladus. Option B is the correct answer.
Lack of impact craters on much of its surface, evidence of ice flows from possible volcanic activity and geysers that supply material for the E-ring.
The evidence suggesting that Enceladus has ongoing geological activity includes the lack of impact craters on much of its surface, which indicates that the surface is relatively young and has been resurfaced. This suggests ongoing geological processes.
Additionally, evidence of ice flows indicates the presence of possible volcanic activity, which contributes to the geological activity on Enceladus. Furthermore, geysers on Enceladus supply material for Saturn's E-ring, indicating ongoing geologic activity.
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Which statement accurately describes mass-energy equivalence?
O It includes the idea that mass is a measure of the energy within an object.
O It states that mass-energy can be created or destroyed.
O It can be represented using the formula E = m²c.
O It states that all energy in the universe will be converted to mass.
Answers
The statement that describes the mass-energy equivalence is that mass-energy can be created or destroyed. Thus, option B is correct.
The mass-energy equivalence gives the relation between mass and energy in the rest frame. This relation was given by Albert Einstein. Energy and mass are directly proportional to each other. Energy can be converted into mass and the mass of the body is converted into energy. Thus, the mass and energy can either be created or destroyed.
The mass-energy equivalence, E = mc², where E is the energy, m is the mass and c is the speed of light. Thus, the mass-energy equivalence states that mass energy can be created or destroyed.
Thus, the ideal solution is option B.
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if the current in the long straight wire is increasing, what current is induced in the circular loop?
Answers
If the current in a long straight wire is increasing, the current is induced in the circular loop will be generated in the nearby circular loop.
Faraday's Law states that the electromotive force (EMF) induced in a circuit is proportional to the rate of change of magnetic flux passing through it. As the current in the straight wire increases, the magnetic field around it strengthens, and the change in magnetic flux through the circular loop causes an induced current. The direction of this induced current is determined by Lenz's Law, which states that the induced current will flow in such a way as to oppose the change in magnetic flux causing it.
In this case, as the magnetic field due to the straight wire increases, the induced current in the circular loop will flow in a direction that generates a magnetic field opposing the increase in the straight wire's magnetic field. The magnitude of the induced current depends on the rate of change of the magnetic field, the loop's size, shape, and distance from the straight wire, as well as the resistance of the loop's material. If the current in a long straight wire is increasing, the current is induced in the circular loop will be generated in the nearby circular loop.
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4. As a 500 N woman sits on the floor, the floor exerts a force on her of
ext
a) 1000 N.
b) 500 N.
c) 250 N.
d) 50 N.
e) 5 N.
Answers
Answer: 1000
Explanation:
Its double her weight
What is the line segment formula?
Answers
Formula of
Line segment
is AB =
\(\sqrt{(x_{2} -x_{1} )^{2} } +\sqrt{(y_{2} -y_{1} )^{2} }\)
Line segment
is a part of line with definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as
Line segment
.
A ______________________ B
(x₁,y₁) (x₂,y₂)
This line segment can be represented as \(\frac{}{AB} /\frac{}{BA}\). In other word we can say line segment is
subset
of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by
ruler
. A bar (-) is always on top of its notation {\(\frac{}{AB}\)}.
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Formula of Line segment is AB = \(\sqrt{(x_{2}-x_{1})^{2} } +\sqrt{(y_{2}-y_{1})^{2} }\)
Line segment
is a part of line with a definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as
Line segment
A ______________________ B
(x₁,y₁) (x₂,y₂)
This line segment can be represented as\(\overline{AB}/\overline{BA}\) . In other word we can say line segment is subset of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by ruler A bar (-) is always on top of its notation {\(\overline{AB}/\overline{BA}\)}.
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Q.7. For a system with a transfer function of G(s)=- co² s² +2a+w² if the natural frequency is 0.5 and the damping ratio is 1.3, which of the following statements is correct regarding the unit step response of the system?
O A) Damped
O B) Undamped
O C) Underdamped
O D) Crittically Damped
O E) Overdamped
Answers
The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)
The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.
To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).
The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).
In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).
Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.
If co > co_critical, the system is considered overdamped (Option E).
If co = co_critical, the system is considered critically damped (Option D).
If co < co_critical, the system is considered underdamped (Option C).
Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.
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The person is in motion
relative to...
Answers
Answer:
muscular force in relative to this
why does electric field not have an impact on the radius of a proton moving in helix motion due to magnetic field
Answers
Electric field does not have any impact on the radius of the proton moving in helix motion due to magnetic field because it can change only the tangential motion of the charged particle.
Electric field refers to the field around a charged particle in which it tends to either attract or repel the other charged bodies present in its field of influence. Magnetic field is the field produced due to the magnetic waves which travel from one pole to another. Both these fields affect the motion of particle in certain ways. The motion is determined by Right hand rule in case of magnetic field and the helical motion of the proton is produced only by magnetic field.
The relation between radius of proton is inversely proportional to strength of magnetic field and there is no interference of electric field. It is given as:
r = mv/Bq, where
m = mass of particle
v= velocity of particle in circular/ helical motion
B= Magnetic field
q = charge on the particle
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Was there any angle given with the question
Answers
Answer:
No.
Explanation:
In the question, no mathematical angle is shown.
Some knowledge of radioactivity would be useful for understanding which of
the following?
Check all that apply.
A. certain medical procedures
n B. radon in homes
C. rocket boosters on the space shuttle
O D. determining ages of fossils
SUBMIT
Answers
Some knowledge of radioactivity would be useful for understanding the certain medical procedures. Option A is correct.
What is radioactivity?The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.
Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.
Radiation is also important in agriculture, archaeology, space exploration, law enforcement, geology a variety of other fields.
Some knowledge of radioactivity would be useful for understanding the certain medical procedures.
Hence, option A is correct.
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PLS SOMEONE HELP PLSSS
Answers
you have been hired to design a spring-launched roller coaster that will carry two passengers per car. the car goes up a 12-m -high hill, then descends 18 m to the track's lowest point. you've determined that the spring can be compressed a maximum of 2.5 m and that a loaded car will have a maximum mass of 450 kg . for safety reasons, the spring constant should be 13 % larger than the minimum needed for the car to just make it over the top.
Answers
Design a spring-launched roller coaster with a max compression of 2.5m, 450kg car, and safety with 13% larger spring constant.
To design a spring-launched roller coaster, I will start by calculating the minimum spring constant needed for the car to reach the top of the 12-m hill. From there, I will increase the spring constant by 13% to ensure safety.
The spring will be compressed a maximum of 2.5 m, and the loaded car will have a maximum mass of 450 kg.
The car will ascend the hill and then descend 18 m to the track's lowest point, providing an exhilarating ride for two passengers per car.
With these specifications in mind, I will use my knowledge of physics to create a thrilling and safe roller coaster experience.
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How do vaccines provide immunity
Answers
Answer:
Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.
Answer: They give you a portion of the thing its fighting so it gets your cells use to it so they can fight it off easily
Explanation:
A car originally at rest reaches 40m/s after accelerating for 50s. Calculate its acceleration
Answers
Explanation:
initial velocity=0
final velocity=40m/s
time=50s
acceleration=?
now,
a=v-u/t
a=40-0/50
a=40/50
a=0.8m/s^2
answer
Three identical metal balls A, B, and C are mounted on insulating rods. Ball A has a charge and balls B and C are initially uncharged. Ball A is touched first to ball B and then separately to ball C. At the end of this experiment, the charge left on ball A is ...
Answers
At the end of this experiment, the charge left on ball A is _equal and opposite_.
What is the charge left on metal ball A after touching metal balls B and C?When ball A, which has an initial charge, is touched to ball B, the charge is shared equally between the two balls. Now, both ball A and ball B have half the initial charge of ball A. When ball A is touched to ball C, which was initially uncharged, the charge on ball A is shared equally between the two, resulting in each ball having a charge that is one-third of the initial charge of ball A.
This is because the metal balls are conductive, meaning that they can easily transfer charge when in contact with one another. When two conductors are brought into contact, their charges redistribute to reach a new equilibrium. In this case, the charges redistribute in a way that ensures that each conductor has the same potential.
The final charges on the three balls will depend on the initial charge on ball A. If the initial charge on ball A is q, then the final charge on each of the three balls will be q/2, q/6, and q/6, respectively.
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Julissa, Haily
and Johnisha nave a picnic.
An acorn falls from a tree and
lands on Johrțisha's sandwich. What is the law?
Answers
Answer:
Newtons law of gravity I think
Monochromatic ultraviolet light with intensity 550 W /m² is incident normally on the surface of a metal that has a work function of 3.44 eV . Photoelectrons are emitted with a maximum speed of 420 km / s . (a) Find the maximum possible rate of photoelectron emission from 1.00 cm² of the surface by imagining that every photon produces one photoelectron.
Answers
The maximum possible rate of photoelectron emission from 1.00 cm² of the surface is 4.3 x 10^23 by imagining that every photon produces one photoelectron.
To find the maximum possible rate of photoelectron emission from 1.00 cm² of the surface, we need to use the equation for the photoelectric effect:
E = hf - φ
where, E = kinetic energy of the emitted photoelectron
hf = energy of the incident photon
φ = work function of the metal.
First, let us convert the given units to SI units:
Intensity = 550 W/m²
Speed = 420 km/s
1 W/m² = 1 J/s/m², so the intensity can also be expressed as 550 J/s/m².
1 km = 1000 m, so the speed can be expressed as 420,000 m/s.
The energy of a photon can be calculated using the formula:
E = hf
where h = Planck's constant, which is approximately 6.63 x 10^-34 J s.
The work function, φ, is given as 3.44 eV. We need to convert this to joules:
1 eV = 1.6 x 10^-19 J
Therefore, φ = 3.44 eV * (1.6 x 10^-19 J/eV) ≈ 5.504 x 10^-19 J.
Now, let us find the energy of the incident photon:
E = hf
Rearranging the equation, we can solve for f:
f = E / h
The maximum kinetic energy of the emitted photoelectron, E, is given by:
E = 1/2 * m * v^2
where m = mass of the electron, which is approximately 9.11 x 10^-31 kg, and v = speed of the photoelectron.
Converting the speed to meters per second:
v = 420,000 m/s
Now, we can find the energy of the emitted photoelectron, E:
E = 1/2 * (9.11 x 10^-31 kg) * (420,000 m/s)^2 ≈ 8.58 x 10^-17 J
Substituting the values into the equation for the energy of the incident photon:
f = (8.58 x 10^-17 J) / (6.63 x 10^-34 J s) ≈ 1.295 x 10^17 Hz
Now, we can find the rate of photoelectron emission from 1.00 cm² of the surface by multiplying the intensity of the incident light by the number of photons per second:
Rate = intensity * number of photons
The number of photons per second can be calculated using the formula:
number of photons = intensity / energy of each photon
number of photons = (550 J/s/m²) / (hf)
number of photons = (550 J/s/m²) / [(6.63 x 10^-34 J s) * (1.295 x 10^17 Hz)]
number of photons ≈ 7.85 x 10^20 photons
Finally, we can find the maximum possible rate of photoelectron emission from 1.00 cm² of the surface:
Rate = (550 J/s/m²) * (7.85 x 10^20 photons)
Rate ≈ 4.3 x 10^23 photoelectrons emitted per second from 1.00 cm² of the surface.
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Gamma radiation can be significantly reduced by…
A sheet of paper
Air
A 3 mm thickness of aluminium
Several cm of lead
Answers
Answer:
Several cm of lead
Explanation:
2
A simple circuit contains a battery and a resistor.
Over 3.0 hours, 29 000 C of charge passes through the resistor.
Calculate the current flowing through the circuit during this time.
Give your answer to two significant figures.
Answers
Answer:
Approximately \(2.69\; {\rm A}\).
Explanation:
Ensure that all values are measured in standard units. Charge should be measured in coulombs, while time should be measured in seconds:
\(\begin{aligned}t &= 3.0\; {\rm hr} \times \frac{3600\; {\rm s}}{1\; {\rm hr}} = 10800\; {\rm s}\end{aligned}\).
Electric current \(I\) is the rate of flow of electric charge.
In order to find the electric current, divide electric charge \(q\) by the time \(t\) required to transfer these charge. If charge \(q\!\) is measured in coulombs and time \(t\!\) is measured in seconds, the unit of current \(I\)would be amperes:
\(\begin{aligned}I & = \frac{q}{t} \\ &= \frac{29000\; {\rm C}}{10800\; {\rm s}} \approx 2.69\; {\rm A}\end{aligned}\).