Answer:
c
Explanation:
what is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm the mass of an electron is 9.11*10^-31 kg
With a vacuum wavelength of 488 nm and an electron mass of 9.11*10^-31 kg, an electron travelling at 1490.45 m/s has the same momentum as a photon.
The pace at which the distance a moving item travels changes is measured as speed. Since speed is a scalar, it has magnitude but no direction as a unit of measurement. Speed is the rate at which anything moves over a predetermined distance. The elementary electric charge of the electron, sometimes known as the symbol e or, is a negative one. Given that they have no known components and are part of the first generation of lepton particles, electrons are frequently regarded as being elementary particles to its wavelength.
E = mc^2
mc^2 = hc/(lamda)
v = h/m(lamda)
v = 6.626*10^-34/9.11*10^-31*488*10^-9
v = 1490.45 m/s
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THIS IS PART OF YOUR PRAC APP:
Given 5.9V and 3.02amps for a rectifier.
If the present rectifier voltage output remains constant, calculate current output if the circuit resistance of the cathodic protection system doubles
A) 5.0A
B) 6.04A
C)1.5A
D) 3.2A
E) 2.2A
The correct answer is option C) The current output would be 1.51 amps if the circuit resistance of the cathodic protection system doubles.
The current output (I) of a circuit can be calculated using Ohm's Law, which states that I = V/R, where V is the voltage and R is the resistance. In this case, the voltage output of the rectifier is 5.9V and the current output is 3.02A. If the circuit resistance doubles, the new resistance would be 2R, where R is the original resistance. To calculate the new current output, we can use the formula \(I = V/(2R) = (1/2)*(V/R) = (1/2)*3.02A = 1.51A\). As the resistance of the circuit increases, the current output decreases proportionally, according to Ohm's Law.
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a homer in in a baseball game was measured at 450 feet. how many meters is this equal to?
For a moving object, the force acting on the object varies directly with the object's acceleration. When a force of45N
acts on a certain object, the acceleration of the object is5m/s∧2
. If the force is changed to81N
, what will be the acceleration of the object?
Answer:
9
Explanation:
the force is directly proportional to acceleration
F=ma
F1/a1=F2/a2
45/5=81/a2
81×5/45=9M/S²
If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will:__________
The true airspeed will increase and true altitude will increase.
What is true air speed?True airspeed is the airspeed of an aircraft relative to undisturbed air.
It's the aircraft speed relative to the airmass in which it's flying.
How does outside air temperature affect air speed?If the outside air temperature increases during a flight at constant power and at a constant indicated altitude, the true airspeed will increase and true altitude will increase.
Thus, the true airspeed will increase and true altitude will increase.
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what is the magnitude of velocity for a 1500 kg car possessing 4500 kgm/s of momentum?
Simple Harmonic Motion: A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency
Answer:
The frequency will still remain F
Explanation:
Firstly, we should remember that the frequency of a simple harmonic oscillator doesn't depend on the amplitude. Rather, it depends on the spring constant, k, and the mass of the attached weight, m. This means that the change in amplitude will not lead to a corresponding change in frequency.
the frequency is represented by the formula
f = 1/2π * √(k/m),
where
f = frequency of the oscillator
k = spring constant and
m = mass attached to the spring
From the formula above, we can state that the frequency doesn't depend on the amplitude at all, and as such, the amplitude changing from A to 2A, will effect no change in the frequency F.
A cube of copper and a sphere of aluminum are both positively charged and connected by a wire. What do the two conductors have in common?
The two conductors have the same potential. The copper cube and the aluminum sphere are both positively charged and connected by a wire. When two conductors are connected by a wire, they have the same potential.What is electrical potential
Electric potential, often known as electric potential energy per unit charge, is a scalar quantity that is comparable to potential energy. It is a measure of the electrical energy a charged particle can hold. The work done per unit of charge to bring a charge from a large distance to a point in an electric field is known as electric potential.Explanation:When a wire connects two conductors, it creates a conductive pathway for electrons. Because the potential is the same at all points in a conductor,
it is not necessary to connect the two conductors to every point along their surface in order to connect them electrically.The positive charges within each conductor will be repelled by the positive charge on the other conductor, causing the electrons in each conductor to move away from the positive charges and towards the negative charge on the wire connecting them. Eventually, electrons will build up on one conductor and be removed from the other conductor until the potential of each conductor is equal and no more current flows.
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two uses of electricity
Which of these does a balanced chemical
equation show?
the speed of a reaction
elements created by a reaction
phase changes taking place during a
reaction
the number of atoms involved in a reaction
A balanced chemical reaction shows the element created by the reaction, phase changes during the reaction, and the number of atom involved in it.
What are balanced chemical equation?
A balanced chemical equation is a chemical equation in which the number of atoms for each element in the reaction are equal on both sides of the equation. This is important in chemistry because it ensures that mass is conserved in a chemical reaction. For example, the combustion of methane (CH4) can be represented by the following balanced chemical equation:
CH4 + 2O2 → CO2 + 2H2O
In this equation, there are 4 atoms of carbon (C) on the left side and 4 atoms of carbon on the right side, indicating that all of the carbon has been accounted for in the reaction. There are also 8 atoms of oxygen (O) on the left side and 8 atoms of oxygen on the right side, 4 atoms of hydrogen (H) on the left side and 4 atoms of hydrogen on the right side, and 4 atoms of oxygen (O) on the left side and 4 atoms of oxygen on the right side, indicating that all of the elements have been accounted for in the reaction.
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Ace Batteries uses the Capital Asset Pricing Model to calculate the cost of equity capital. Which of the following event will REDUCE the company's WACC (weighted average cost of capital). a. An increase in the flotation costs associated with issuing new common stock. b. An increase in the market risk premium. c. A decrease in the company's beta d. An increase in flotation cost of issuing preferred stock.
WACC (Weighted Average Cost of Capital) is a calculation used to assess a company's cost of capital. It is computed by multiplying each source of capital (equity, debt, and preferred stock) by its relevant weight and then summing these up.
In this question, Ace Batteries is utilizing the CAPM (Capital Asset Pricing Model) to determine the cost of equity capital.Ace Batteries' WACC can be reduced if the company's beta decreases. The beta of a company is a measure of its market risk or volatility, and it is a component of the CAPM formula
As a result, a lower beta lowers the cost of equity capital, lowering the company's WACC. Consequently, option c: A decrease in the company's beta, will REDUCE Ace Batteries' WACC (weighted average cost of capital).
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The particles of a substance vibrate in place but stay in fixed positions. when thermal energy is added to this upsets, the particle stay close together but start to slide past one another. what change in state has occurred?
The change in state that has occurred is the substance transitioning from a solid to a liquid state.
When thermal energy is added to a substance, its particles gain kinetic energy, causing them to vibrate more vigorously. In the solid state, the particles are tightly packed and vibrate in place. However, with the addition of thermal energy, the particles overcome the intermolecular forces holding them in fixed positions, and their increased kinetic energy enables them to slide past one another. This results in a change in the substance's physical state from solid to liquid.
In the liquid state, the particles still maintain some degree of proximity to each other, but they are no longer confined to fixed positions. They have greater freedom of movement, allowing them to flow and take the shape of their container. The intermolecular forces in the liquid state are weaker than those in the solid state, as evidenced by the ability of the particles to move more freely. However, these forces are still present, keeping the particles in close proximity.
The transition from solid to liquid is known as melting. It is a reversible process, meaning that if the substance is cooled down, it can revert to its solid state through the process of solidification or freezing.
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An orbiting satellite experiences no force due to the Earth's
gravity.
Answer:
false
Explanation:
The statement "An orbiting satellite experiences no force due to the Earth's gravity." is a False statement. This is further explained below.
What is Gravity?Generally, Gravity is simply defined as the force that pulls items toward the center of a planet or other entity.
In conclusion, an orbiting satellite experiences force due to the Earth's gravity.
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Why is gravity so weird?
Will mark as brain list
Answer:
No force is more familiar than gravity — it's what keeps our feet on the ground, after all. And Einstein's theory of general relativity gives a mathematical formulation for gravity, describing it as a “warping” of space.
For your assigned element provide:
1. Atomic Symbol
2. Atomic Number
3. Atomic Mass (round to nearest whole number).
4. # of protons
5. # of electrons
6. Average # of neutrons
Element: Iron (Fe)
1. Atomic Symbol: Fe
2. Atomic Number: 26
3. Atomic Mass: 56 (rounded to the nearest whole number)
4. Number of Protons: 26
5. Number of Electrons: 26
6. Average Number of Neutrons: 30
Iron (Fe) has an atomic symbol Fe, an atomic number of 26, and an atomic mass of 56 (rounded to the nearest whole number). It contains 26 protons and 26 electrons. On average, iron has 30 neutrons in its nucleus.
Iron is a chemical element with the symbol Fe and atomic number 26. Its atomic mass is approximately 56, which is the sum of the protons and neutrons in its nucleus. Iron has 26 protons, which determine its atomic number and uniquely identify it as iron.
The number of electrons in an atom is equal to the number of protons, so iron also has 26 electrons. Neutrons, on the other hand, contribute to the mass of the atom without affecting its chemical properties.
The average number of neutrons in iron is approximately 30, calculated by subtracting the atomic number (protons) from the atomic mass (rounded to the nearest whole number). Iron is a common element found in the Earth's crust and is known for its strength, versatility, and role in various biological processes.
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assume a deep water wave: would a diver at 20 meters depth notice the passage of a wind wave that has a wavelength of 30 meters? why?
Depth of water is 20m with a wavelength is 30m inclined at 1.56 x 10⁻⁷ m/s.
Principle-Water is a combination of longitudinal and transverse waves called surface waves.δψ²=0 is the equation of continuity.Speed is the product of 1.56 & wave period.Wave period refers to reciprocal of frequencyMathematics-E=hv
E=hc/x
x is wavelength
c is speed of light
v=c/x
Calculations-v= 3x10⁸/30
v= 10⁷Hz
Wave period= 10⁻⁷sec.
Speed = 1.56 x 10⁻⁷ m/s.
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A(n) 0.49 kg softball is pitched at a speed of20 m/s. The batter hits it back directly at thepitcher at a speed of 25 m/s. The bat acts onthe ball for 0.012 s. What is the magnitude of the average force exerted by the bat on the ball? Answer in units of N.
Given,
The mass of the softball, m=0.49 kg
The speed with which the ball was thrown, u=-20 m/s
The speed of the ball after the batter hits it, v=25 m/s
The time duration for which the bat acts on the ball, t=0.012 s
Here we have considered the direction from the pitcher to the batter as the negative direction and the direction from batter to the pitcher as the positive direction.
The momentum of an object is given by the product of the mass of the object and its velocity.
The change in the momentum of the ball is given by,
\(\begin{gathered} \Delta p=mv-mu \\ =m(v-u) \end{gathered}\)On substituting the known values,
\(\begin{gathered} \Delta p=0.49(25-(-20)) \\ =22.05kg\cdot\frac{m}{s} \end{gathered}\)The change in the momentum is equal to the impulse that acts on an object due to the applied force. And the impulse is given by the product of the applied force and the time duration.
Thus,
\(\begin{gathered} I=\Delta p \\ =F\cdot t \\ \Rightarrow F=\frac{\Delta p}{t} \end{gathered}\)Where I is the impulse and F is the magnitude of the average force exerted by the bat on the ball.
On substituting the known values,
\(\begin{gathered} F=\frac{22.05}{0.012} \\ =1837.5\text{ N} \end{gathered}\)Thus the magnitude of the average force exerted by the bat on the ball is 1837.5 N
Taking somebody else’s ideas and passing them off as your own is called?
Answer:
Copy Cating or just CopyingExplanation:
I think that the Answer to this is copying because it is like when some body says something and then the other person is mocking them then that would be called COPYING......Answer:
Plagiarism
Explanation:
Its using someone else's stuff and saying its yours.
A Over ordinary temperature ranges, the resistance of most metals such as copper increases as the metal gets hotter. O decreases as the metal gets hotter. is a maximum at 20°C. is independent of the temperature of the metal. Submit Request Answer Provide Feedback
The correct option is A: Over ordinary temperature ranges, the resistance of most metals such as copper increases as the metal gets hotter.
Most metals including copper have a temperature coefficient of resistance, which means that their resistance increases with temperature. Over ordinary temperature ranges, the resistance of most metals such as copper increases as the metal gets hotter. For instance, an increase in temperature results in an increase in the number of collisions of free electrons with ions, which makes the free electrons move at a slower rate through the material. This reduces the drift current, causing an increase in resistance. When temperature decreases, the opposite occurs and resistance decreases. This temperature dependence is critical for temperature sensors, temperature control devices, and temperature compensation circuits.The maximum amount of resistance that a metal can provide is proportional to its size, type, and composition. However, the resistance of metals increases at lower temperatures. They behave like superconductors and lose all of their electrical resistance at extremely low temperatures.
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which of the following isn't an example of potential energy? chewing food water stored in a reservoir burning wood a fan blade turning jogging
Jogging is not an example of potential energy.
Potential energy refers to the energy that an object possesses due to its position or state. Chewing food, water stored in a reservoir, and burning wood are all examples of potential energy.
Chewing food is an example of chemical potential energy, as the food contains energy stored in its chemical bonds that can be released through digestion. Water stored in a reservoir is an example of gravitational potential energy, as the water has the potential to do work due to its position relative to the Earth's surface. Burning wood is an example of thermal potential energy, as the wood contains energy that can be released through combustion.
A fan blade turning is an example of kinetic energy, which is the energy of motion. When the fan blade turns, it has kinetic energy due to its motion.
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an organ pipe acts as a closed-end resonator. what is the length of an organ pipe which has a fundamental frequency of 18 hz?
The length of the organ pipe with a fundamental frequency of 18 Hz is approximately 9.53 meters.
In a closed-end resonator, such as an organ pipe, the fundamental frequency is determined by the length of the pipe. The fundamental frequency corresponds to the first harmonic, where the pipe vibrates with one-half of a wavelength.
The formula to calculate the fundamental frequency of a closed-end pipe is:
f = v / (2L),
where f is the fundamental frequency, v is the speed of sound, and L is the length of the pipe.
Rearranging the formula, we have:
L = v / (2f).
Given that the fundamental frequency is 18 Hz, and the speed of sound is approximately 343 m/s at room temperature, we can substitute these values into the formula:
L = 343 m/s / (2 * 18 Hz) = 9.53 meters.
Therefore, the length of the organ pipe with a fundamental frequency of 18 Hz is approximately 9.53 meters.
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By what means can the internal energy of a closed system increase?.
Answer:
when work is done on the system or heat comes into the system
The rings of Saturn are composed of chunks of ice that orbit the
planet. The inner radius of the rings is 73,000 km, and the outer
radius is 170,000 km.
Part A) Find the period of an orbiting chunk of
The period of an orbiting chunk of ice in the rings of Saturn is approximately 333,170.7 years.
The period of an orbiting chunk of ice can be found using Kepler's third law, which states that the square of the period of an orbiting object is proportional to the cube of its average distance from the planet's center.
To find the period, we first need to calculate the average distance of the orbiting chunk of ice from the planet's center. This can be done by finding the average of the inner and outer radii of the rings:
Average distance = (inner radius + outer radius) / 2
= (73,000 km + 170,000 km) / 2
= 121,500 km
Next, we can use Kepler's third law to find the period. Let T represent the period, and r represent the average distance:
T^2 = k * r^3
Solving for T, we get:
T = sqrt(k * r^3)
Since we are only interested in the magnitude of the period, we can disregard the constant k. Thus, the period is given by:
T = sqrt(r^3)
Substituting the value of r, we get:
T = sqrt(121,500^3)
Calculating this, we find:
T ≈ 333,170.7 years
Therefore, the period of an orbiting chunk of ice in the rings of Saturn is approximately 333,170.7 years.
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Write the word conduction, convection or radiation in the blanks in front of the numbers.6. _____________________ Heat from the sun warming a swimming pool.7. _____________________ Changing a light bulb while it’s still hot.8. _____________________ Heat from the hood of a car when you touch it the hood.9. _____________________ Feeling the heat from a stove burner without touching the stove.10. ____________________ Boiling water moving in a circular motion.
Conduction: heat transfers by direct contact
Convection : heat transfers within fluid
Radiation: heat transfers due to electromagnetic waves
Conduction: 7 , 8 ,
Convection : 10
Radiation : 6,9
regarding the oscilloscope and based on the information provided in the laboratory manual. what axis measures the voltage strength, the x-axis or the y-axis?
pertaining to the oscilloscope and in accordance with the details in the laboratory manual. what axis quantifies the voltage intensity? Voltage (on the vertical axis) versus time is plotted on the oscilloscope's graph (on the horizontal axis).
What is meant by a Oscilloscope?An oscilloscope is a class of electronic test equipment that graphically shows changing electrical voltages as a two-dimensional plot of one or more signals as a function of time.
The major goals are to show on the screen waveforms that are repeating or singular and would otherwise occur too quickly for the human eye to see. The waveform that is being presented can then be examined for characteristics like amplitude, frequency, rising time, time interval, distortion, and others.
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(PLEASE HELP. DUE IN 4 HOURS. I WILL CASHAPP YOU $20 TO GIVE A CORRECT ANSWER. PLEASE LEGIT ANSWERS. I AM DESPERATE. GIVING BRAINLIEST, THANKS, AND 5 STARS. THANK YOU.)
In Video 2, you observed a "Frictionless Pendulum", the frictionless pendulum can only be simulated. Go back and see if you can observe any changes in motion. How would the motion of the pendulum change if that was a demonstration rather than a simulation? Use the CER (claim, evidence, reasoning) template to answer.
CLAIM: Write your answer to the question given: The motion of a real pendulum would ______________________ (describe how it would or would not change).
EVIDENCE: This is your example, model, observation, or idea demonstrating your claim, you could begin with “According to…” or “Based on...”, or "Watch how..."
REASONING: You could begin with, “This is because…” or “The fact that supports this evidence is…”. ONLY state science facts to support your example, do not guess, use opinion, or use inferences here.
Answer:
When the mass is drawn upwards and let go, the force of gravity accelerates it,
Explanation:
if you send me the video i can give you a better answer its just hard without seeing it
A woman runs 4.5 miles south and 3,7 miles east. What is the angle of the displacement of the resultant?
Answer:
51°
Explanation:
Please see attached photo for explanation.
In the diagram, R is the resultant and θ is the angle of the displacement of the resultant.
The value of θ can be obtained as follow:
Angle θ =?
Opposite = 4.5 miles
Adjacent = 3.7 miles
Using Tan ratio:
Tan θ = Opposite / Adjacent
Tan θ = 4.5 / 3.7
Tan θ = 1.2162
Take the inverse of Tan
θ = Tan¯¹ 1.2162
θ ≈ 51°
Thus, the angle of the displacement of the resultant is 51°
What name did marie curie give to the process by which materials give off rays capable of fogging photographic plates?
The study of radioactivity by Marie Curie marked a significant turning point in the realm of physics and had a significant influence on scientific knowledge. Now let's get into the specifics.
"Radioactivity" is the term Marie Curie coined to describe the phenomenon whereby materials emit radiation that can fog photographic plates. During her uranium investigation in 1896, she made this discovery. This game-changing discovery opened the door for more research into and comprehension of radioactivity, which resulted in important developments in the field of nuclear physics.
Marie Curie's research on radioactivity served as a springboard for additional nuclear physics research and has profound ramifications for other fields of science and medicine. It resulted in improvements in our knowledge of atomic structure, the creation of radiation therapy for the treatment of cancer, and the eventual exploitation of nuclear energy.
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What is the magnitude of the net force on the first wire in (figure 1)? express your answer in newtons
0.00025 N is the magnitude of the net force on the first wire in (figure 1).
What is net force?The total of all forces exerted on an item is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there are a lot of forces acting on a system, the phrase "net force" is employed.
From the diagram, first wire has an attracting force from third wire at 0.04 m distance and a repelling force from second wire at 0.02 m distance.
Expression of the force is -
F = [µ ×π×(I)² × L] / (2πd)
When d = 0.02 m,
or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.02)
or, F = 0.0005 N
And when d = 0.04 m,
or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.04)
or, F = 0.00025 N
So, the net force on first wire = 0.005 - 0.00025
= 0.00025 N repelling or upward.
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The complete question is as follows:
What is the magnitude of the net force on the first wire in (Figure 1)?
Express your answer in newtons.
A Martian weighs 27 N at the surface of the Mars. The acceleration due to gravity at the surface of Mars is 3.8 m/s^2. The acceleration due to gravity at the surface of Earth is 9.8 m/s^2. The acceleration due to gravity at the surface of Earth's moon is 1.6 m/s^2.
1.Calculate his mass on Earth.
2.Calculate his weight on Earth.
3.Calculate his mass on Earth's moon.
4.Calculate his weight on Earth’s moon.
I NEED HELP ASAPPP ILL GIVE A 100 BRAINLISTS
Answer:
1. 7.105 kg 2. 69.629 N 3. 7.105 kg 4. 11.368 N
Explanation:
Firstly the main point is that " mass " is independentnof the the place wheather it is no earth or moon or some else place.
So mass is
W = mg
27 = m 3.8
m =7.105 kg
1. Mass on Earth :
m = 7.105 kg
2. Weight on Earth:
W=mg
W=7.105 × 9.8
W = 69.629 N
3.Mass on Moon:
m = 7.105 kg
4. Weight on Moon:
W =mg
W =7.015 ×1.6
W= 11.368 N