2. electric current in a solid metal conductor is caused by the
movement of (5f)
a. electrons only
b. protons only
c. both electrons and protons
d. neutrons
Answers
Electric current in a solid metal conductor is caused by the movement of electrons only. The correct option is A.
In a solid metal conductor, electric current is caused by the movement of electrons. Metals have free or delocalized electrons that are not bound to any particular atom and are free to move throughout the material.
When a potential difference, or voltage, is applied across the conductor, the free electrons are pushed or pulled in a specific direction, creating a flow of charge, which we call an electric current.
the electric current in a solid metal conductor is predominantly caused by the movement of electrons (option a), while protons and neutrons do not significantly contribute to the flow of electric current in such materials.
It's important to note that protons are generally fixed within the atomic nucleus and do not participate in the movement of electric charge in a conductor. Neutrons, being electrically neutral, also do not contribute to the flow of current.
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Related Questions
3. A skydiver started his jump from the airplane. He fell 4.9 m in the 1st second, 14.7 m
in the 2nd second, 24,5 m in the 3rd second. How far did he fall between the 7th and the
10th seconds?
Arithmetic or geometric
Answers
The distance between the 7th and the tenth second is 29.4 m.
What is the progression?We know that we can have to formulate the information that has been given here so as to obtain a proper progression and this would help us to get the common difference of the progression that we are looking at.
Now we know that the progression would look something like; 4.9, 14.7, 24.5 ....
We can see that this is an arithmetic progression that has a common difference of 9.8.
U7 = a + (n - 1)d
a = first term
n = Number of terms
d = common difference
U7 = 4.9 + (7 - 1) 9.8
= 63.7
U10 = 4.9 + (10 - 1) 9.8
U10 = 93.1
Between the 7th and 10th seconds, we have;
93.1 - 63.7
= 29.4 m
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Writing an Argument About Galetown’s Severe Storms Note: If you do not have access to Amplify Science at home, your teacher will provide you with an alternate way to complete this homework. In your final report to the citizens of Galetown, you will discuss the three claims and explain how all three factors can contribute to severe storms. Then, you will predict if the storms will always be severe. What caused Galetown to have more severe rainstorms this summer than in previous years?
Claim 1: The lake that was built near Galetown caused it to have more severe rainstorms.
Claim 2: Warmer weather caused Galetown to have more severe rainstorms.
Claim 3: Stronger winds caused Galetown to have more severe rainstorms.
Be sure to use some of the vocabulary words you have learned in both of your writing assignments: Word Bank air parcel, cloud,condensation, energy, evaporation, temperature, transfer, troposphere, water vapor, weather, wind
Recall from the previous activity which claims you think are best supported by evidence. Use these claims to explain what is happening in Galetown. You can use the data table and the words listed in the word bank above to help you with your report that answers the question: What caused Galetown to have more severe rainstorms this summer than in previous years? Press NEXT to move on to the second part of the written report. Write a 3-5 paragraph argumented essay
Answers
The claim that can be deduced is that B. Warmer weather caused Galetown to have more severe rainstorms.
What is a claim?It should be noted that a claim simply means the stance of an author in a literary work.
In this case, the claim is that warmer weather caused Galetown to have more severe rainstorms.
When the temperature of an air parcel begins higher, this will make it rise higher in the troposphere before the temperature of the air parcel and surrounding air are equal.
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How can I skip class:
A: Fake sick.
B: Have a heating pad on my heat to have a fake fever.
C: Fake barf
D: Act fine until a test the neb sick
Answers
Answer:
c gl
Explanation:
::::::::::::::::::::::::
WILL MARK AS BRAINLIEST...,.. A constant force vector f =2i cap+3j cap-5k cap acts on a particle and displaces it from (1,2,-3) m to (2,5,-1) m. find the work done by the force .
Answers
Explanation:
Given that,
Force, \(F=2i+3j-5k\)
The particle displaces from (1,2,-3) m to (2,5,-1) m.
We need to find the work done by the force. Work done by the force is given by :
W = Fd
It is equal to the dot product of force and displacement.
Displacement from (1,2,-3) m to (2,5,-1) m is (2-1, 5-2, -1-(-3)) or (1, 3, 2) m
Work done,
\(W=F{\cdot} d\\\\W=(2i+3j-5k){\cdot} (i+3j+2k)\)
We know that, i.i=j.j=k.k=1
So,
\(W=1\ J\)
So, the work done by the force is 1 J.
Can someone help me PLEASEEE ASAP
Answers
Answer:
12 meters and 2 n
Explanation:
16 - u = 6 (8.0 + 11)
A radio wave has a frequency of 5.5 × 104 hertz and travels at a speed of 3.0 × 108 meters/second. What is its wavelength?
Answers
Answer:5.45X10^3m
Explanation:So use the formula,v= fλ
3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer
Answer:
5.45X10^3m
Explanation:
Brady chucks a water balloon at Russell in the lunchroom. Running for his life, Russell travels 147m in 9.8s. What was his speed?
Answers
List what you know:
d = 147 m
t = 9.8 s
Now solve for s by plugging 147m in for d and 9.8s in for t.
s = 147m/9.8s = 15m/s
Russell’s speed was 15m/s
Determine the magnitude and coordinate direction angles of the resultant force acting on the bracket?
Answers
For force F2 cos2 c + cos2 c + cos2 45 + cos2 * 60 = 1 cos c = 0.5 c = 60 degree, force F1 = 450 * (cos(45) * cos(30) j - cos(45) * sin(30) i + sin(45) k).
What is a force in science?
In science, the term "force" has a particular definition. At this point, describing a force as a push or a pull is perfectly acceptable. There is no such thing as a force that an object "has in it" or "contains." A force is applied to one thing by another.
What different types of force are there?
A force is a push or pull that an object feels as a result of interacting with another object. The Force of Friction is one of many forces. Tension force Standard Force.
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What is the dependent variable in this
experiment?
DONE
Biologists designed an experiment to test
the effect of compost on the development
of root crops. They tested several different
crops, including carrots, potatoes, beets,
and onions. They grew most of the plants
in the greenhouse, but due to space issues,
they had to grow some outdoors. They gave
all the plants the same amount of compost.
They obtained the compost from a local
farmer and from the local hardware store.
They ran out of the farmer's compost, so
some of the plants received that compost
when the seeds were planted and other
plants got hardware store compost after
the plants had already started growing.
What is the independent variable in this
experiment?
DONE
Answers
Answer:
"the plants had already started growing."
Explanation:
I think this is the answer because the definition of a dependent variable is the variable that is being affected by the change. Since the plants had already started growing BECAUSE of "They ran out of the farmer's compost, so
some of the plants received that compost
when the seeds were planted and other
plants got hardware store compost after
the plants had already started growing."
Sorry if I am wrong, I am just a 4th grader, pls don't hate on me, I am just trying to help :)
Answer:
It's compost
Explanation:
In case you needed the dependent variable, its the amount of plant growth
Given three items as {value, weight} pairs {{20, 10}, {30,10}, {20,5}}. The capacity of the knapsack=20. Assume items are divisible, please find the maximum value we can take using the knapsack.
Group of answer choices
A. 60
B. 80
C. 100
D. 40
Answers
The maximum value that can be taken using the knapsack, given the items' {value, weight} pairs and a knapsack capacity of 20, is 60. Therefore the correct option is A. 60.
To find the maximum value that can be taken using the knapsack, we can apply the concept of the Knapsack Problem. The Knapsack Problem is a classic optimization problem in computer science.
Given the items' {value, weight} pairs and the knapsack capacity of 20, we need to select a combination of items that maximizes the total value while ensuring that the total weight does not exceed the knapsack capacity.
Using a dynamic programming approach, we can construct a table to track the maximum value achievable at each weight and for each item. Starting with an empty knapsack (weight = 0), we iterate through each item and update the table based on whether including the current item would increase the total value.
By considering all possible combinations, we can determine that the maximum value achievable with the given items and knapsack capacity is 60.
Therefore, the correct answer is A. 60.
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A 0.40 kg mass hangs on a spring with a spring constant of 12 N/m. The system oscillated with a constant amplitude of 12 cm. What is the maximum acceleration of the system
Answers
Answer:
The maximum acceleration of the system is 359.970 centimeters per square second.
Explanation:
The motion of the mass-spring system is represented by the following formula:
\(x(t) = A\cdot \cos (\omega \cdot t + \phi)\)
Where:
\(x(t)\) - Position of the mass with respect to the equilibrium position, measured in centimeters.
\(A\) - Amplitude of the mass-spring system, measured in centimeters.
\(\omega\) - Angular frequency, measured in radians per second.
\(t\) - Time, measured in seconds.
\(\phi\) - Phase, measured in radians.
The acceleration experimented by the mass is obtained by deriving the position equation twice:
\(a (t) = -\omega^{2}\cdot A \cdot \cos (\omega\cdot t + \phi)\)
Where the maximum acceleration of the system is represented by \(\omega^{2}\cdot A\).
The natural frequency of the mass-spring system is:
\(\omega = \sqrt{\frac{k}{m} }\)
Where:
\(k\) - Spring constant, measured in newtons per meter.
\(m\) - Mass, measured in kilograms.
If \(k = 12\,\frac{N}{m}\) and \(m = 0.40\,kg\), the natural frequency is:
\(\omega = \sqrt{\frac{12\,\frac{N}{m} }{0.40\,kg} }\)
\(\omega \approx 5.477\,\frac{rad}{s}\)
Lastly, the maximum acceleration of the system is:
\(a_{max} = \left(5.477\,\frac{rad}{s})^{2}\cdot (12\,cm)\)
\(a_{max} = 359.970\,\frac{cm}{s^{2}}\)
The maximum acceleration of the system is 359.970 centimeters per square second.
From the scattering of sunlight, J.J. Thomson calculated the classical radius of the electron as having the value 2.82 × 10⁻¹⁵m . Sunlight with an intensity of 500 W / m² falls on a disk with this radius. Assume light is a classical wave and the light striking the disk is completely absorbed.(a) Calculate the time interval required to accumulate 1.00eV of energy.
Answers
The time interval required to accumulate 1.00 eV of energy is approximately 7.16 × 10¹¹ seconds.
To calculate the time interval required to accumulate 1.00 eV (electron volt) of energy from sunlight with an intensity of 500 W/m² falling on a disk with a radius of 2.82 × 10⁻¹⁵ m, we can use the equation:
Energy = Power * Time
Given:
Intensity (I) = 500 W/m²
Radius (r) = 2.82 × 10⁻¹⁵ m
Energy (E) = 1.00 eV
First, we need to calculate the total power received by the disk. Since the light is completely absorbed, we can assume that all the power is absorbed by the disk. The power can be calculated using the formula:
Power = Intensity * Area
The area of the disk can be calculated as follows:
Area = π * (radius)²
Substituting the values into the equation:
Area = π * (2.82 × 10⁻¹⁵ m)²
Next, we can calculate the power:
Power = Intensity * Area
= 500 W/m² * [π * (2.82 × 10⁻¹⁵ m)²]
Now we can solve for time:
Time = Energy / Power
= (1.00 eV) / [500 W/m² * π * (2.82 × 10⁻¹⁵ m)²]
To convert eV to joules, we use the conversion factor:
1 eV = 1.602 × 10⁻¹⁹ J
Substituting this conversion and the numerical values:
Time = (1.602 × 10⁻¹⁹ J) / [500 W/m² * π * (2.82 × 10⁻¹⁵ m)²]
Therefore, the time interval required to accumulate 1.00 eV of energy is approximately 7.16 × 10¹¹ seconds.
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Find the horizontal and vertical components of 75.0 N at 65 degrees
Answers
Horizontal component = 75 · cosine(65°) = 31.7 N
Vertical component = 75 · sine(65°) = 68.0 N
The model shows how the Sun fuses two nuclei of hellum-3 into beryllium-6. Since beryllium-6 is unstable, it will decay into smaller nuclei.
What additional product completes the model?
O A Helium-4
OB Helium-8
o C Carbon-4
OD Carbon-8
Answers
Answer:
A
Explanation:
I took the test
An object is placed 11.9 cm in front of a mirror. What type must the mirror be to form an image of the object on a wall 1.73 m away from the mirror? What is the magnification of the image? Is the image real or virtual? Is the image inverted or upright?
Answers
The mirror is a Concave mirror, the magnification is 0.55.
What is optics?The field of physics known as optics is concerned with the behaviour and characteristics of light, including how it interacts with matter and how to build instruments that can either use or detect it.
Since the image is upright and larger than the object, we need a concave mirror.
We know image height, h/object height, h = -image distance, d'/object distance, d
h'/h = -d'/d
Using the real is a positive convention,
h'= + 11.9 cm, h = + 21.3cm and d = 173 cm.
11.9 cm/ 21.3 cm = -d'/+ 173
0.55 = -d'/ 173
d' = -95.15 cm
Magnification = image height, h'/object height,h
Magnification = 11.9 / 21.3 = 0.55
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At what distance from a 1.0-C charge is the electric potential equal to 12 V?A) 8.3 Ã 107 mB) 7.5 Ã 108 mC) 9.0 Ã 108 mD) 1.1 Ã 109 mE) 3.0 Ã 109 m
Answers
The distance from the charge at which the electric potential equals 12 V is about 7.5 108 m. Therefore the correct option is option B.
The electric potential owing to a point charge can be calculated as follows:
V = k * Q / r
where V represents the electric potential, k represents the Coulomb constant (9 109 Nm2/C2), Q represents the charge, and r represents the distance from the charge.
We are given a 12 V electric potential and a charge of 1.0 C. When we enter these values into the formula, we get:
\(12 = (9 × 10^9 N·m^2/C^2) * (1.0 C) / r\)
When we solve for r, we get:
\(r = (9 × 10^9 N·m^2/C^2) * (1.0 C) / 12\)
\(r = 7.5 × 10^8 m\)
As a result, the distance from the charge at which the electric potential equals 12 V is about 7.5 108 m, which is similar to option (B) 7.5 108 m.
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forces can be________. What phrase completes the sentence.
1.Pushes only
2.Pushes or pulls
3.Pulls only
Answers
Answer:
pushes or pulls
Explanation:
hope this helps....
the cylinder is 4872 N and the cylinder exerts a pressure of 812 N/m2. on the
ground.
To 2 decimal places, what is the diameter of the cylinder?
Answers
The diameter of the cylinder is 2.49 meters if the cylinder is 4872 N and the cylinder exerts a pressure of 812 N/m2. on the ground.
First, we need to find the area of the base of the cylinder that is in contact with the ground. To do this, we can use the formula for pressure: Pressure = Force/Area. Rearrange the formula to solve for Area: Area = Force/Pressure.
Given:
Force exerted by the cylinder (N) = 4872 N
Pressure exerted by the cylinder (N/m^{2}) = 812 N/m^{2}
Calculate the Area:
Area = Force/Pressure = 4872 N / 812 N/m^{2} = 6 m^{2}
Now, we know the area of the base of the cylinder. Since the base is a circle, we can use the formula for the area of a circle: Area = π * (diameter/2)^{2}. Rearrange the formula to solve for diameter: Diameter = 2 * √(Area/π).
Calculate the Diameter:
Diameter = 2 * √(6 m^2/π) ≈ 2.49 meters
The diameter of the cylinder, to 2 decimal places, is approximately 2.49 meters.
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How is speed different from velocity?
Answers
Answer:Speed is the time rate at which an object is moving along a path
Velocity is the rate and direction of an object's movement.
Explanation:
Hope it helps
Emily learns that ancient astronomers, such as Ptolemy, created a model of the solar system based only on what they could see with their eyes. Describe Ptolemy's model of the solar system and how he came to his conclusions. Then describe Galileo's model of the solar system. Explain how Galileo proved that his model was correct and that Ptolemy’s was not correct. Pls help!!
Answers
Ptolemy's model of the solar system, known as the Ptolemaic system, was a geocentric model in which Earth was considered the center of the universe.
Ptolemy observed the apparent motions of the celestial bodies and concluded that they moved in complex circular paths, known as epicycles, around Earth.
His model aimed to explain the observed retrograde motion of planets.
In contrast, Galileo's model of the solar system was heliocentric, with the Sun at the center.
Galileo used a telescope to observe celestial bodies and made several significant discoveries, such as the phases of Venus and the moons of Jupiter.
His observations supported the heliocentric model proposed by Copernicus.
Galileo's proof came from his observations of Venus. He observed that Venus went through phases similar to the Moon, which contradicted the Ptolemaic model.
According to Ptolemy's model, Venus should always appear as a crescent or half-moon shape, never a full or nearly full circle. Galileo's observations demonstrated that Ptolemy's model was not accurate, providing evidence for the heliocentric model.
In summary, Ptolemy's model placed Earth at the center of the solar system and relied on complex epicycles to explain planetary motion.
Galileo's observations and discoveries, particularly regarding Venus, supported the heliocentric model and disproved Ptolemy's geocentric model.
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Roughly where is the magnet when the light bulb is the brightest? (the brightness of the light bulb correlates with how much the needle of the voltmeter gets deflected away from the middle.)
Answers
The light bulb is brightest when either end of the magnet is in the middle of the coil.
What is Light bulb?An electric light with a wire filament that has been heated until it glows is known as an incandescent light bulb, incandescent lamp, or incandescent light globe. To prevent oxidation, the filament is encased in a glass bulb with a vacuum or inert gas. Terminals or wires buried in the glass provide current to the filament. Electrical connections and mechanical support are provided by a bulb socket.
From 1.5 volts to around 300 volts, incandescent bulbs are produced in a variety of diameters, light outputs, and voltage ratings. They operate just as well on alternating current as they do on direct current, have inexpensive production costs, and don't need any extra regulating apparatus. As a result, incandescent bulbs are often utilised for illumination in homes and businesses.
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please help well be very much appreciated <3 Currently, fossil fuels are one of the world's primary energy sources. The graph shows the amount of carbon
that has been released in the atmosphere since 1900 due to the burning of fossil fuels.
Answers
Answer: the answer is d
Explanation:
I got it right
as you are talking to a friend on your cell phone, you might find that you can’t hear them because they are speaking very softly. if you ask them to "speak up," from a physical perspective you are asking them to ________ of the sound waves they are producing.
Answers
Answer: increase the amplitude
Explanation: it’s the correct answer
why is the coefficient of static friction greater than kinetic?
Answers
The coefficient of static friction is greater than the coefficient of kinetic friction because it must overcome the initial inertia and intermolecular forces keeping surfaces at rest together, whereas kinetic friction deals with the resistance to motion once the surfaces are already moving.
When two surfaces are at rest relative to each other, the coefficient of static friction comes into play. This frictional force resists the tendency of the surfaces to start moving.
The coefficient of static friction is higher because it needs to overcome the initial inertia and intermolecular forces holding the surfaces together. The irregularities and interlocking between the surfaces require more force to break them apart and initiate motion.
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1. Your friend tells you that the time-dependence of their car's acceleration along a road is given by a(t) = yt² + yt, where is some constant value. Why must your friend be wrong? (10 points) 2. A p
Answers
Your friend must be wrong because the time-dependence of acceleration is given by the derivative of velocity with respect to time, not the time itself. The equation a(t) = yt² + yt does not represent the correct relationship between acceleration and time.
Acceleration is defined as the rate of change of velocity with respect to time. In mathematical terms, it is the derivative of velocity with respect to time, denoted as a(t) = dV/dt. Therefore, the equation a(t) = yt² + yt provided by your friend does not represent the correct relationship between acceleration and time.
To determine the correct relationship, we need to integrate the equation for acceleration to obtain the velocity function. Given that a(t) = yt² + yt, integrating both sides with respect to time gives V(t) = (1/3)yt³ + (1/2)yt² + C, where C is the constant of integration. However, this equation represents the velocity as a function of time, not the acceleration.
Your friend's equation a(t) = yt² + yt for the time-dependence of acceleration is incorrect. Acceleration is the derivative of velocity with respect to time, not a function of time itself. The correct relationship can be obtained by integrating the acceleration equation, yielding the velocity as a function of time.
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The momentum of an object is determined to be 72 x 10kg. m/s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg - 1000 g) Value
Answers
The momentum of an object is 720000 gm. m/s.
Given momentum of an object is 72 x 10kg. m/s.
Let's convert kg into grams (gm).
We know that 1 kg = 1000 gm.
So, momentum in grams (gm) = 72 × 10 × 1000 gm. m/s
Momentum = 720000 gm. m/s
Thus, the momentum of the object is 720000 gm. m/s.
Write the answer as follows:
The momentum of the object is 720000 gm. m/s
Explanation: Momentum is defined as the product of mass and velocity of an object. It is a vector quantity. Its unit is kg. m/s.
It can also be expressed in equivalent units such as gram. cm/s, newton-seconds (N.s), etc.
Conclusion: Thus, the momentum of an object is 720000 gm. m/s.
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What direction would the north pole of a bar magnet point if you were to hang the bar magnet from a thin string?.
Answers
Answer:
TOWARD the North pole.
Explanation:
A circuit with 0.7 A running through the battery and two 16 Ω resistors in parallel. What is the voltage of the battery?
Answers
Answer:
Below
Explanation:
The two PARALLEL resistors equal: 1 / (1/16 + 1/16) = 8 Ω
V = IR = .7 (8) = 5.6 v
A 3.00 m long rod (I=1/3ML2) with a mass of 10.0 kg is set so that it pivots around its end. The rod is pulled back until it is horizontal and released. A small spherical ball with a mass of 4.00 kg is placed directly under the pivot point of the rod so that the end of the rod strikes the ball when it is vertical.
What is the angular velocity at the bottom before it hits the ball?
Answers
Hi there!
Assuming the rod is pulled back 90° (π/2 radians), we can use angular kinematics to solve.
Using the equation:
\(\omega_f^2= \omega_i^2 + 2\alpha \theta\)
\(\omega_f\) = final angular velocity (? rad/sec)
\(\omega_i\) = initial angular velocity (0 rad/sec)
\(\alpha\) = angular acceleration (rad/sec², must solve for)
\(\theta\) = angular displacement (π/2 rad)
Recall Newton Second Law's rotational equivalent:
\(\Sigma \tau = I\alpha\)
τ = Torque (Nm)
I = Moment of inertia (kgm²)
α = angular acceleration (rad/sec²)
Setting the pivot point at the end, and knowing that the force of gravity works at an object's center of mass (1.5m from the rod's end), we can solve for the angular acceleration.
\(\tau= F \times r\\\\\tau = W \times r = 10(9.8) * 1.5 = 147 Nm\)
Now, solve for the moment of inertia given I = 1/3ML² at one of its ends:
\(I = \frac{1}{3}(10)(3^2) = 30 kgm^2\)
Solve for the angular acceleration:
\(147 = 30\alpha\\\\\alpha = 4.9 \frac{rad}{sec^2}\)
Now, we can use the kinematic equation to solve.
\(\omega_f^2 = 0 + 2(4.9)(\frac{\pi}{2}})\\\\\omega_f = \sqrt{2(4.9)(\frac{\pi}{2})} = \boxed{3.923 \frac{rad}{sec}}\)
Hello, can you help me? I have this question and I don't know how to answer it. Is a tire a conductor or an insulator? Thank you!
Answers
Answer: They're Conductors.
Explanation: