The electric potential at a given point is zero if the electric field there is also zero.
No, just because there is no electric field at a certain location does not entail that there is also no electric potential there. The situation of two similar charges that are spread apart is an excellent example. Electric Potential (V): The amount of work required to move a unit positive charge in an electric field from infinity to a specific point is known as electric potential. (E) Electric Field The term "electric field" refers to the electric force per unit positive charge at a place. We use the electric field for each point charge to determine where the electric field is zero.
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8. [2.0 pts) (Step C4 : foil pieces not initially touching) (a) Based on your observation, draw the distribution of top and bottom charges for both pieces of aluminum foil when: (1) The charged PVC pipe is nearby (ii) The charged PVC pipe has been moved away (b) Explain the initial and final charge distributions drawn above.
The distribution of the top and bottom charges for both pieces of the foil is as below. The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces.
(a) (1) When the charged PVC pipe is nearby, electrons are transferred from the PVC pipe to the aluminum foil pieces due to the difference in their electrical potential. This results in one piece of foil becoming positively charged and the other piece becoming negatively charged.
(a) (ii) When the charged PVC pipe is moved away, the charges on the aluminum foil pieces will remain unchanged because the charges are now separated and will not interact with each other. The distribution of charges on the two pieces of foil will remain constant until another charged object is brought into close proximity.
(b) The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces, resulting in one piece becoming positively charged and the other negatively charged. The final charge distribution is determined by the separation of charges on the foil pieces and the lack of interaction between the charges. The charges on the foil pieces will remain constant until they are affected by another charged object.
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triton, the largest moon of neptune, has a retrograde orbit. what does that mean?
Retrograde orbit means triton orbiting around the neptune in the direction opposite to the direction in which the neptune is rotating.
Retrograde orbit or retrograde motion is that motion of a planet/moon or any other celestial body, in which they rotate opposite to their prime's rotational direction. On the other hand, prograde motion of a moon or object is the rotational motion in the same direction of its primary.
In our solar system, all the planets and other objects, except many comets, prograde around the sun in the same direction in which the sun rotates around its own axis, except Venus and Uranus. However both of the planets' planetary rotational around their own axes are also prograde.
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does a heat flux vector at a point p on an isothermal surface of a medium have to be perpendicular to the surface at that point? explain.
A heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
For differentiation between heat flux, there are three categories: convection, conduction, and radiation. For an isothermal surface, the heat flux must be normal to that surface at any point P. This is because the gradient of temperature on the isothermal surface in any direction parallel to the isothermal surface will be zero, thus the heat flux in the direction parallel to the surface area will not be there. The heat flux vector is directed towards regions of lower temperature. So, a heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
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When traveling twice as fast your kinetic energy is increased _______.
When traveling twice as fast your kinetic energy is increased by four times.
Kinetic energy is the energy that can be seen as the motion of an item or a subatomic particle. It is also known as the energy of motion. Kinetic energy is a property that is shared by all moving objects and particles. To calculate the kinetic energy, we can use this following formula:
KE = ½ m × v²
Where:
M = mass of the body
V = velocity of the body
In this case, we are given that:
KE = ½ m × (2 × v)²
KE = 4 (½ × m × v²)
KE = 4 times initial KE
Therefore, the kinetic energy increases four times as the speed doubles.
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They continue the discussion, and Imad makes several comments. Which of Imad's comments is false?A. "Electric field lines never cross each other."B. "At locations where electric field lines meet the surface of an object, the lines are parallel to the surface."C. "Electric field lines always extend from a positively charged object to a negatively charged object, from a positively charged object to Infinity, or from Infinity to a negatively charged object."D. "Electric field lines are most dense around objects with the greatest amount of charge."
The false statement among Imad's comments is D. "Electric field lines are most dense around objects with the greatest amount of charge." Therefore, option D is correct.
The density of electric field lines does not indicate the amount of charge on an object. The density of electric field lines represents the strength or intensity of the electric field at a given point. Electric field lines are closer together where the electric field is stronger, and farther apart where the electric field is weaker.
The density of electric field lines depends on factors such as the magnitude of the charge and the distance from the charged object.
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Which of these statements best describes how a star chart should be held while facing north?
The edge of the map labeled east should be held towards the observer.
The edge of the map labeled south should be held towards the observer.
The edge of the map labeled south should be held on the left of the observer.
The edge of the map labeled east should be held on the right of the observer.
The statements best describes how a star chart should be held while facing north is, The edge of the map labeled south should be held towards the observer.
What is star chart ?
A map or diagram of the stars and other celestial bodies in the sky is called a star chart. The locations of the stars, constellations, planets, and other celestial bodies are often displayed at a certain time and location on Earth. Star maps can be used to locate celestial bodies in the night sky, to organise astronomical observations, or to track their movements through time.
Given that,
The statements,
In between following options, best describes how a star chart should be held while facing north is,
The edge of the map labeled south should be held towards the observer
This is because when facing north, the direction labeled "south" on the map should correspond to the direction of the actual south, and thus be facing the observer.
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what is the intermolecular force of attraction for libr?
The intermolecular force of attraction for LiBr is the Electrostatic force of attraction.
There are two ions in the compound LiBr (Lithium Bromide). These are
Lithium-ion ([tex]Li^{+1}[/tex]).Bromide-ion ([tex]Br^{-1}[/tex]).The lithium atom (Li) removes one electron from its valence shell to form the cation, Lithium-ion ([tex]Li^{+1}[/tex]). The Bromine atom (Br) accepts one electron to its valence shell to form the anion, Bromide-ion ([tex]Br^{-1}[/tex]).
Cations are positively charged and anions are negatively charged.
It is known that opposite charge always attracts each other. So, [tex]Li^{+1}[/tex] and [tex]Br^{-1}[/tex] attracts each other to form the ionic compound, Lithium Bromide (LiBr).
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1. A ____ current means that more _____ flows per second.
2. A student connects up an ammeter in a circuit with a lamp and a cell. The reading is 0.5 A. She moves the ammeter to the other side of the lamp.
a. What will the ammeter read now?
b. Explain your answer.
1.
A stronger current means that more charge flows per second.
2.
a. The ammeter will read the same, 0.5 A.
b. The ammeter measures the flow of electric charge in a circuit, which is called the current. The amount of current in a circuit depends on the properties of the components in the circuit, not the position of the ammeter. Therefore, moving the ammeter to the other side of the lamp will not change the current flowing through the circuit, and the reading will remain the same.
1. An electrical current means that more electrons flows per second.
2. a. 0.5 A
b. Because current always stays the same in series
circuits.
First come first serve, solve for points
When a substance melts, it can exist in both the solid and liquid states, and when it boils, it can exist in either the liquid or gaseous states.
What are the Implications of Different Boiling Points?
The ability to separate liquids through distillation is one practical use of the various boiling points of alcohols and alcohol in relation to water and other liquids. A liquid is carefully heated throughout the distillation process to cause the more volatile chemicals to boil away.They can be gathered and used to distil alcohol, or they can be used to remove substances with lower boiling points from the original liquid to purify it. Alcohols can be distinguished from one another and from other chemical compounds using their distinct boiling points. Alcohol and water can be separated using distillation. Water has a boiling point of 212 F or 100 C which is higher than that of alcohol.To learn more about liquid states refer to:
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what would be the escape speed from an object with the mass of the sun, but with a radius of 8,000 meters?
The sun's escape velocity is roughly 618 km/s.
What is the Sun's escape velocity? It is important to keep in mind that the Sun's escape velocity, which was estimated above, is 615 km/sec, which is more than 50 times faster than the average velocity of H at the Sun's surface. The equation for the escape velocity, vesc, is given by: vesc = Square root of 2GMr, where G is the gravitational constant, M is the mass of the attracting mass, and r is the distance from its center.Deflection Speed.Energy conservation is used to determine the escape velocity:I + k = u + kf.The potential energy of a mass m object at the surface of a planet with radius R and mass M is given by the equation U=-G m M/R.The escape velocity can be calculated using the formula vesc = 2GM/R, where vesc is the escape velocity, G is the gravitational constant, M is the object's mass, and R is the distance from the object's center.To learn more about Sun's escape velocity refer
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Physics
1. A car travels from a stopped position to a velocity of 88 miles per hour east in a time of 6 seconds. Determine the acceleration of the car.
2. airplane is moving across the sky at a constant speed of 350 miles per hour at an altitude of 20,000 feet.
a) Make a model (picture or diagram) explaining the forces working on the plane as it moves across the sky.
b)Explain why the plane does not move towards the surface of the earth.
c) If the speed of the plane slows down to zero, explain what will happen to the plane and why?
3. Determine which of the following is has the fastest speed:
A cat with a speed of 4m/s or a dog running with a speed of 3.5 km/hr.
4. A student travels from Angeles to New York city. If his watch says 12:15 pm at tale off from Los Angeles and lands in
New York at 3:45 pm. The distance travelled is 3,450 kilometers. Determine the average speed of the plane in m/s.
Answer:
sorry i am late
Explanation:
To determine the acceleration of the car, we can use the formula: acceleration = (final velocity - initial velocity) / time. In this case, the initial velocity is 0 (the car is stopped), the final velocity is 88 mph, and the time is 6 seconds. So: acceleration = (88 - 0) / 6 = 14.67 mph/s.
a) The forces working on the plane as it moves across the sky include thrust from the engines, lift generated by the wings, weight (or gravity), and drag (air resistance).
b) The plane does not move towards the surface of the earth because the lift generated by the wings is greater than the weight (or gravity) pulling the plane down.
c) If the speed of the plane slows down to zero, the plane will begin to fall towards the surface of the earth. This is because the lift generated by the wings depends on the speed of the plane and at zero speed, there is no lift to counteract the weight of the plane.
To determine which of the two options has the fastest speed, we need to convert the speed of the dog to m/s. 3.5 km/hr is equivalent to 0.978 m/s. Therefore, the cat (with a speed of 4 m/s) is faster than the dog.
To determine the average speed of the plane, we can use the formula: average speed = distance traveled / time taken. The distance traveled is 3,450 kilometers, and the time taken is 3 hours and 30 minutes (or 3.5 hours in decimal form). So: average speed = 3,450 / 3.5 = 985.71 km/h. To convert this to m/s, we can multiply by 1000/3600 = 0.277 m/s. So the average speed of the plane is 0.277 m/s
a ball is thrown vertically upward from the edge of a bridge 24.0 m high with an initial speed of 13.0 m/s. the ball falls all the way down and strikes the water below. determine the magnitude of the velocity
The magnitude of the velocity of the ball when it strikes the water below the bridge is 26.0 m/s.
This is calculated by using the equation v^2 = v0^2 + 2gh, where v0 is the initial velocity, g is the acceleration due to gravity, and h is the height of the bridge. In this case,
v_0 = 13.0 m/s, g = 9.8 m/s^2, and h = 24.0 m,
so the equation becomes:
v^2 = (13.0 m/s)^2 + 29.8 m/s^2*24.0 m = 884 m^2/s^2, and v = 29.7 m/s
To calculate velocity, you need to know the displacement and time. Velocity is the rate of change of displacement with respect to time, so the formula for calculating velocity is velocity = displacement/time.
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how does the distribution of the home voltage compare to the distribution of the generator voltage? in other words, address uniformity, skewness, normality, etc.
The current is transmitted as an alternating current with a frequency of 50 Hz. The voltage when it arrives at your house is 240 volts. Portable generators provide a current (amps or amperes) at 120 and 240 volts.
Portable generators can supply 12 volts DC, 120 volts AC, or 240 volts AC power, but not all models can supply all three, and some can only supply 120 volts AC. Duplex (twin) outlets are common on portable generators, each supplying 120 volts. Electricity delivered to your home from the power company is 120 and 240 volts. This is called "nominal voltage". This is the voltage measured at the main transformer outside the house. The nominal voltage varies plus or minus 5% under ideal conditions.
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Going downhill a driver applies brakes to keep a constant speed. The potential energy of the car is decreasing while the kinetic energy is constant. Explain where the energy is going?
The potential energy of a car moving with constant speed during downhill converts into heat energy or sound energy during braking.
What is law of conservation of energy?Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another.
When a car goes downhill, its potential energy decreases but as the driver applied braking, the gain in potential energy lost during work against the frictional force applied by the brake and converts into heat energy or sound energy during braking.
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using ohm's law and ignoring units, if the voltage is 10 and the resistance of the circuit is 2, what is the current flow across the resister?
Using Ohm's law, the current flow across the resister is 5 Ampere, if the voltage across the resister is 10 volts, and the resistance is 2Ω.
Voltage across the resistor, V = 10 volts
Resistance of the resistor, R = 2Ω
Let the current flow in the resistor, = I
According to Ohm's law, current flow in a conductor is directly proportional to the voltage across it. The ratio of the voltage and current is a constant called "Resistance".
I ∝ V
R = V/I
I = V/R
I = 10/2
I = 5 A
So the current flow across the resister is 5A.
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in some instances, people who happen to be near the point where a lightning bolt is struck the earth have reported that their clothes are thrown off as a result of a strike. why might this happen?
People that are near a point where a lightning bolt is gonna strike said that their clothes are thrown off by the strike because the lightning may come in contact with their sweat or raindrops that may lie on their skin's surface.
Lightning is an electrostatic discharge that naturally occurs. It happens when two electrically charged regions in the atmosphere (or one of them on the ground) are temporarily neutralized, causing an instant release of energy.
When a person is near a point where a lightning bolt struck the earth, they may experience their clothes getting thrown off. It happens because the lightning comes into contact with the liquid water on the skin's surface, like sweat or raindrops.
When the contact happens, the liquid water turns into steam. Its volume increased so much that it can create a vapor explosion that would throw off their clothes (sometimes even shoes).
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a car rounds a curve of radius 50m. during normal conditions, the force of friction on the 500 kg car is 4500n. determine the maximum speed at which the car can safely negotiate the curve without slipping.
The maximum speed at which the car can safely negotiate the curve without slipping is 450 m/s
The formula v = (Ff / m) x r, where
The maximum speed of the vehicle can be calculated using the friction force Ff, mass m, and curve radius r.
Calculating maximum speed is done as follows:
= (4500N/500kg) x 50m
= 450 m/s
The force produced when two sliding surfaces come into contact with one another is known as the frictional force.
The texture of the surface and the amount of force holding the two surfaces together both have a significant impact on this force.
For instance, the weight of the first thing will exert frictional force when it is placed on top of another object.
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Two carts (100 g and 150 g) on an air track are separated by a compressed spring. The spring is released. Represent the process with a momentum bar chart (a) with one cart as the system and (b) with both carts as the system. (c) Write expressions for all of the physical quantities you can from this
Answer:
The momentum bar chart is a tool used to track the changes in momentum of objects in a system over time.
(a) With one cart as the system:
Initial Momentum: m1v1
Final Momentum: m1v1'
Change in Momentum: m1(v1' - v1)
(b) With both carts as the system:
Initial Momentum: m1v1 + m2v2
Final Momentum: m1v1' + m2v2'
Change in Momentum: (m1 + m2)(v1' + v2' - v1 - v2)
The above expressions represent the changes in momentum of the carts, where m1 and m2 are the masses of the carts, v1 and v2 are their initial velocities, and v1' and v2' are their final velocities. The expressions can be used to calculate the net force acting on the carts using Newton's second law, F = Δp/Δt, where Δp is the change in momentum and Δt is the change in time.
Physical quantities that can be calculated from this scenario include the initial and final momentum of the carts, the change in momentum, the net force acting on the carts, and the acceleration of the carts.
an egg drops from a second-story window, taking 1.12 s to fall and reaching 11.0 m/s just before hitting the ground. on contact, the egg stops completely in 0.131 s. calculate the magnitudes of its average acceleration (a) while falling and (b) while stopping
The average acceleration of the egg while falling can be calculated using the equation a = (v - u)/t, where v is the final velocity, u is the initial velocity and t is time.
The average accelerationa) A = (11.0 m/s) / (1.12 s) = 9.82 m/s^2
b) A = (0 m/s) / (0.131 s) = 0 m/s^2
This is a physics problem involving the concepts of acceleration, velocity, and time.Acceleration is the rate of change of velocity and is a vector quantity, meaning it has both a magnitude and direction.In this case, v = 11.0 m/s, u = 0 m/s and t = 1.12 s.This gives an acceleration of 9.82 m/s^2 downwards, the same value as the acceleration due to gravity.The average acceleration of the egg while stopping can be calculated using the same equation, but with v = 0 m/s, u = 11.0 m/s and t = 0.131 s.This gives an acceleration of -84.3 m/s^2, which is an acceleration directed upwards, opposite to the acceleration due to gravity.In summary, the egg experienced an average acceleration of 9.82 m/s^2 downwards while falling, and an average acceleration of -84.3 m/s^2 upwards while stopping.To learn more about The average acceleration refer to:
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a copper cube has a mass of 80.7 g .find the edge length of the cube. (the density of copper is 8.96 g/cm3 , and the volume of a cube is equal to the edge length cubed.)
The edge length of the cube is approximately 0.11 meters.
The edge length of a cube can be found by using the formula for the volume of a cube and the density of the material it is made of.
Given that the density of copper is 8.96 g/cm³, the volume of a cube with a mass of 80.7 g can be calculated as:
V = m/р
where V is the volume, m is the mass (80.7 g), and ρ is the density (8.96 g/cm³).
Since the volume of a cube is equal to the edge length cubed, we can write the edge length, L, as:
L³ = V
L = [tex](V)^{\frac{1}{3} }[/tex]
Plugging in the values and converting from cm³ to m³, we get:
L = [tex](\frac{80.7}{8.96\times10^{-3} } )^{\frac{1}{3} }[/tex]
L = 0.11 m
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a bicycle pump contains 0.650 l of air at 101 kpa. if the pump is sealed, what pressure is required to change the volume to 0.250 l?
The pressure required to change the volume from 0.650 L to 0.250 L is 298 kPa. We can find out using Ideal Gas Law.
The ideal gas law states that the pressure, volume, and temperature of a gas are related by the equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in kelvins.
Since the temperature is constant, we can simplify the equation to:
P1V1 = P2V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume. Rearranging the equation gives:
P2 = P1 * (V1 / V2)
Substituting in the known values, we find:
P2 = 101 kPa * (0.650 L / 0.250 L) = 298 kPa
Therefore, pressure is 298kPa.
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Three protein molecules make up the thin filament.
a. Which molecule has a binding site for myosin heads?_______________________
b. Which molecule covers this binding site?___________________________________
c. Which molecule has a binding site for calcium ions?________________________
Actin molecule has a binding site for myosin heads, tropomyosin molecule covers this binding site, and troponin molecule has a binding site for calcium ions.
Each globular actin molecule in the thin filaments has a myosin-binding site. The actin molecules are arranged in two long chains and coiled around one another. The myosin binding sites are covered by the tropomyosin protein, which coils itself around the fine filaments.
There is a myosin-binding site on each globular actin molecule in the thin filaments. Actin is composed of two lengthy chains that are coiled around one another. The tropomyosin protein, which coils itself around the tiny filaments, covers the myosin binding sites.
Troponin is a key player in the regulation of muscle contraction by calcium: The only component of the fine filaments in striated muscles that can bind calcium is troponin.
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Using standard heats of formation, calculate the standard enthalpy change for the following reaction.
2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g)
The standard enthalpy change for the reaction
2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g) is -966.4 kJ/mol.
The standard enthalpy change of a reaction can be calculated using the standard heats of formation of the reactants and products. The standard heat of formation, ΔHf°, is the heat absorbed or released when one mole of a substance is formed from its elements in their standard states.
The standard enthalpy change of a reaction is given by the equation:
ΔH°rxn = ΣΔHf°products - ΣΔHf°reactants
where ΔHf°products and ΔHf°reactants are the standard heats of formation of the products and reactants, respectively.
For the reaction 2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g), the standard heats of formation are:
ΔHf°H2S(g) = -20.5 kJ/mol
ΔHf°O2(g) = 0 kJ/mol (since O2 is an element in its standard state)
ΔHf°H2O(g) = -285.8 kJ/mol
ΔHf°SO2(g) = -296.8 kJ/mol
So, the standard enthalpy change for the reaction is:
ΔH°rxn = (2 ΔHf°H2O + 2 ΔHf°SO2) - (2 ΔHf°H2S + 3 ΔHf°O2)
ΔH°rxn = (2 × -285.8 + 2 × -296.8) - (2 × -20.5 + 3 × 0)
ΔH°rxn = -966.4 kJ/mol
Therefore, the standard enthalpy change for the reaction is -966.4 kJ/mol.
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Solid water becomes a liquid when the pressure increases isothermally. The entropy of the water¬¬¬¬_______
A. Increases
B. Decreases
C. Remains the same
Solid water becomes a liquid when the pressure increases isothermally. The entropy of the water Increases
This is because the increase in pressure causes the water molecules to gain more thermal energy and become more disordered.
This results in an increase in entropy, as the number of available microstates for the water molecules has increased.
In general, an increase in temperature or pressure results in an increase in entropy, as it promotes a greater degree of disorder and randomness in the system.
Conversely, a decrease in temperature or pressure will result in a decrease in entropy, as it promotes a greater degree of order and stability in the system.
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On a cello the 0.68 m long strings are turned by winding one end around a peg or fret. For a peg diameter of 15mm, calculate how many turns will be necessary to achieve a tension in the 1.36 mm diameter string of 84 N (approximately middle G)
The number of turns turned by winding around a peg are calculated to be 0.003.
Extension δ is given by the formula,
δ = εL = σL/E = FL/AE
where, F is force
L is length
A is area
E is modulus of elasticity
⇒ (84 × 0.68)/[π(1.36 × 10⁻³)²/4](210 × 10⁹) = 0.00019 m
And this is wrapped around the peg's circumference,
Number of turns n = 0.00019/π d = 0.00019/π(15 × 10⁻³) = 0.003 times or about 1.4 degrees.
The peg needs to be turned 1.4 degrees.
Thus, the number of turns turned by winding around a peg are calculated to be 0.003.
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A certain first order reaction between two gases
occurs at 389 K with a half-life of 24 hours. How
much time is required to drop the pressure of one of
the gases from 2.0 atm to 0.25 atm at 389 K?
A) 8 hours B) 72 hours
C) 192 hours D) 288 hours
The time required to drop the pressure of one of the gases from 2.0 atm to 0.25 atm at 389 K is 288 hours, or Option (D).
For a first order reaction, the change in pressure of a gas is proportional to its initial concentration and to the rate constant of the reaction. The half-life of a first order reaction is defined as the time required for the concentration of a reactant to decrease to half its initial value.
The rate constant (k) of a first order reaction can be related to its half-life (t1/2) as follows:
k = 0.693 / t1/2
We can use this relationship to find the rate constant for our reaction:
k = 0.693 / 24 hours = 0.0289 h^-1
Next, we can use the rate constant to find the time required for the pressure of one of the gases to decrease from 2.0 atm to 0.25 atm:
P = P0 * e^(-kt)
ln(P/P0) = -kt
-t = ln(P/P0) / k
where P0 is the initial pressure, P is the final pressure, t is the time, and e is the base of natural logarithms.
Plugging in the values, we get:
-t = ln(0.25/2.0) / 0.0289 h^-1
t = 288 hours
Therefore, the time required to drop the pressure of one of the gases from 2.0 atm to 0.25 atm at 389 K is 288 hours, or Option D).
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a 12 v battery of 0.05-ohm resistance and another battery of 12 v and 0.075 ohm resistance supply power to a 2-ohm resistor. what is the current through the load?
The required current through the load when two batteries are connected is calculated to be 11.3 A.
Two batteries are connected in series so their voltages should be added.
Total voltage V = 12 V + 12 V = 24 V
The total resistances of the two batteries is,
⇒ 0.05 + 0.075 = 0.125 ohm
Load resistance is given as 2 ohm.
Now, let us calculate the load current.
From ohm's law, we know that, V = i R
where, V is voltage
i is current
R is resistance
Making i as subject, we have,
i = V/R = 24/(2 + 0.125) = 11.3 A
Thus, the current through the load is calculated to be 11.3 A.
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When traveling twice as fast your kinetic energy is increased _______.
When traveling twice as fast your kinetic energy is increased: by four times
What is kinetic energy?It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
The kinetic energy depends on velocity, so when the velocity increased twice the kinetic energy increase 2^2= 4
The kinetic energy formula is:
K.E. = 1/2 * m * v²
Where:
v = speed
m = mass
Joules = Kg m²*s²
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what is the force on the 1.0 nc charge in the middle of the figure shown below due to the other four charges? give your answer in component form and in magnitude and direction.
The net force on charge of 1 nC is, [tex]F = 0\ \hat{i} + 1.02 \times 10^{-3}\ \hat{j}[/tex] Newtons.
Electric force on a charge q₁ due to charge q₂ is,
[tex]F = \dfrac{kq_1q_2}{r^2}[/tex],
where r is the distance between the charges and k is the permittivity of free space.
The other four charges are of magnitude 2 nC.
The diagonals of a square are equal. Hence the magnitude of forces due to all other four charges is same.
Now, talking about direction of forces, the force, for the positive 2 nC charge its towards the negative and for negatives too it's towards the negative charge.
Now, the y- component of forces cancel away.
The x-component in negative x-direction adds up.
[tex]F = 4 \times \dfrac{k(2)(1)}{\dfrac{1}{\sqrt2}^2} \times 10^{-9-9+4} \times sin(45^0)[/tex]
[tex]F = 1.02 \times 10^{-3}[/tex]
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"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. The nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult therefore the statement which corrects the error in the passage is that a baby grasshopper is a nymph and is therefore denoted as option B.
What is an Exoskeleton?This is referred to as an external skeleton that supports and protects an animal's body while an internal skeleton such as in humans is referred to as endoskeleton.
During metamorphosis, egg hatches into larva and then to nymph which is referred to as the baby of the insect involved thereby making it the correct choice.
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The full question:
"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
Which statement corrects the error in the passage?
Question 3 options:
A baby grasshopper is a larva.
A baby grasshopper is a nymph.
The grasshopper nymph hatches.
The nymph has no exoskeleton
