The correct answer is D, which is creating an electromagnet by wrapping an insulated wire around a ferromagnetic material and applying an electric current.
Explanation:Electromagnets are created by wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current. Therefore, the correct answer to the student's question is D. An electric current flowing through the wire creates a magnetic field around the ferromagnetic material like iron, which enhances the magnetism effect. This process does not simply apply a charge to the material or involve twisting the ferromagnetic material. It also does not require covering a present magnet with insulation or applying an alternating electrical current.
The most common type of lighting unit utilized in street lighting is:
a. metal halide lamps
b. mercury vapor lamp
c. high-intensity sodium vapor lamp
d. incandescent lamp
If you notice that two waves combine and a part of the resulting wave has less light intensity than either of the individual waves, you're observing A. destructive interference. B. polarization. C. constructive interference. D. diffraction.
A skier slides horizontally along the snow for a distance of 12 m before coming to rest. the coefficient of kinetic friction between the skier and the snow is μk = 0.060. initially, how fast was the skier going?
Which of the following best explains why it is important to clean up a liquid spill that occurs during a science experiment? options: A The student could lose points for spilling the liquid B Students can slip on the liquid C It could affect the results of the experiment D IT would make the class look untidy
Answer:
Students could slip on the liquid.
Explanation:
When you see steam fog or clouds you are seeing water on the liquid state t or f?
The statement is false that wherever you see the stem, fog, or clouds you are seeing water in a liquid state.
What is a Cloud?In the Earth's atmosphere, clouds are visible collections of minute water droplets or ice crystals. The size, form, and color of clouds vary widely. They can appear big and lumpy or delicate and airy.
Because the small water droplets inside of clouds are closely packed, they typically have a white appearance because they reflect most of the sunlight that strikes them. Our eyes interpret the combined spectrum of sunlight as white. Clouds become darker as rain approaches because the water vapor is condensing into raindrops and widening the spaces between them. It reflects less light. The rain cloud looks to be gray or black.
Therefore, the given statement is false.
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A plane is flying due East at 57.0 m/s. However, there is a 13.0 m/s wind blowing towards the North. What would the diagram to find the velocity of the plane look like?
Which statement describes the relationship between plants, animals, and the carbon cycle? Plants use carbon and release oxygen, and animals release carbon and use oxygen. Animals use carbon and release oxygen, and plants release carbon and use oxygen. Animals use carbon through respiration, and plants fix carbon through photosynthesis. Plants use carbon when they decompose, and animals release carbon when they decompose.
The statement that best describes the relationship between plants , animals and carbon cycle is : ( A ) Plants use carbon and release oxygen and animals release carbon and use oxygen.
Carbon cycleIn the carbon cycle plants absorb carbon dioxide from the atmosphere and energy from sunlight and water to produce its food ( photosynthesis ). during photosynthesis plants give back oxygen into the atmosphere which is inhaled by animals during respiration.
Animals take in oxygen while giving out carbon dioxide as a waste product.
Hence we can conclude that the correct statement is plants use carbon and release oxygen and animals release carbon and use oxygen.
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How do scientists know the true environmental lapse rate in a column of air?
How do you calculate the speed of an object?
Answer:
[tex]\huge \boxed{S=\frac{d}{t} }[/tex]
[tex]\rule[225]{225}{2}[/tex]
Step-by-step explanation:
The formula to find speed is as follows:
[tex]\Longrightarrow \ \ \displaystyle \sf speed =\frac{distance \ travelled }{time \ taken}[/tex]
[tex]\Longrightarrow \ \ \displaystyle S =\frac{d }{t}[/tex]
You divide the distance travelled by the time taken to find the speed.
[tex]\rule[225]{225}{2}[/tex]
Describe the gases that are emitting from a volcanic eruption. What affect do they have on the atmosphere and planet?
A plane travels 2.5 KM at an angle of 35 degrees to the ground, then changes direction and travels 5.2 km at an angle of 22 degrees to the ground. What is the magnitude and direction of the planes total displacement??
We can solve for the resultant x and y components by using the sine and cosine functions.
resultant x = 2.5 cos 35 + 5.2 cos 22 = 6.87 km
resultant y = 2.5 sin 35 + 5.2 sin 22 = 3.38 km
The resultant displacement is calculated using hypotenuse equation:
displacement = sqrt (6.87^2 + 3.38^2)
displacement = 7.66 km
The resultant angle is:
θ = tan^-1 (3.38 / 6.87)
θ = 26.20°
Therefore the magnitude and direction is:
7.66 km, 26.20° to the ground
To find the plane's total displacement, we calculate the horizontal and vertical components of each part of the journey, then combine these components. The magnitude is the hypotenuse of the triangle formed by the summed components, while the direction is the angle from the horizontal.
Explanation:We can find the plane's total displacement by breaking the first and second parts of the journey into their respective horizontal and vertical components and then combining these components. Here's how we'll do it step-by-step:
Calculate the horizontal (x) and vertical (y) components of the first displacement using trigonometry:The magnitude is the hypotenuse of the right triangle formed by the x_total and y_total components, and the direction is the angle that this vector makes with the positive x-axis, which is usually horizontal ground-level movement.
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An object at rest is suddenly broken apart into two fragments by an explosion one fragment acquires twice the kinetic energy of the other what is the ratio of their masses
An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 1005 nm. part a what is the value of n for the level to which the electron relaxed? express your answer as an integer.
Answer:
final relaxed state is m = 3
Explanation:
As we know that due to transition of electron the wavelength emitted is given as
[tex]\frac{1}{\lambda} = Rz^2(\frac{1}{m^2} - \frac{1}{n^2})[/tex]
now we know that
[tex]\lambda = 1005 nm[/tex]
now we have
[tex]\frac{1}{1005\times 10^{-9}} = 1.01\times 10^7(\frac{1}{m^2} - \frac{1}{49})[/tex]
now by solving above equation for m we will have
m = 3
so the final relaxed state is m = 3
Which components are part of all scientific investigations? Check all that apply. scientific question hypothesis variables control procedure conclusion
All scientific investigations include certain core components: a scientific question, a testable hypothesis, defined variables, a control for comparison, a detailed procedure for conducting experiments, and concluding observations that address the hypotheses. These steps are part of the scientific method.
Components of Scientific InvestigationsThe components that are part of all scientific investigations typically include the following:
Scientific question: The foundation of the investigation, where the curiosity or inquiry is articulated.Hypothesis: A testable prediction or explanation that addresses the scientific question.Variables: These are the elements that can be changed or controlled in an experiment, including independent (manipulated) and dependent (observed) variables.Control: This is the standard to which comparisons are made in an experiment.Procedure: The step-by-step plan for conducting the experiment.Conclusion: The summary of the investigation's findings, determining whether the hypothesis is supported or refuted.These components are integral parts of the scientific method, a process primarily used in scientific investigations. The scientific method includes making observations, asking a question, forming a hypothesis, testing the hypothesis, and drawing conclusions. It also emphasizes the importance of communication in sharing results with the scientific community.
describe what would happen to the volume of gas if the pressure on it were decreased than the gases temperature were increased
Alice and jim calculate that they must do 1,800 j of work to push a piano up a ramp. however, because they must also overcome friction they actually must do 2,400 j of work. what is the efficiency of the map
During an earthquake, where is the greatest motion felt on the surface?
An airplane is flying with constant speed of 300 m/s along a horizontal circle with a radius of 15,000 m. if the lift force of the air on the wings is perpendicular to the wings, at what angle relative to the horizontal should the wings be banked?
Angle; θ ≈ 31. 5°
This question involves centripetal motion and angle of elevation.
We are told that the lift force of the air on the wings is perpendicular to the wings.This means, from centripetal motion we can write the force as;
F•sin θ = mv²/r - - - (1)
Where θ is the angle relative to the horizontal if the wings are banked.
r is radius
v is speed
Similarly, resolving the force Component along the horizontal x-axis, we will have;F•cos θ = mg - - - (eq 2)
We are given radius and speed but we don't have force (F) and mass(M). Thus, we can eliminate them by dividing equation 1 by equation 2 to get;(F•sin θ)/(F•cos θ) = (mv²/r)/mg
tan θ = v²/rg
Plugging in the relevant values L, we have;
tan θ = 300²/(15000 × 9.8)
tan θ = 0.6122
θ = tan^(-1) 0.6122
θ ≈ 31. 5°
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4. A plane traveling at 300.0 km/h attempts to land on a 500 m runway. The plane’s engines and brakes accelerate uniformly at –5.0 m/s2. Will the plane be able to land safely? Show all your work. Include any equations used, the given and unknown. Show all calculations. Express numerical answers with the correct number of significant digits. Remember to carry one or two extra decimal places throughout calculation. Do not round until the end.
How many inner shell electrons does iodine have?
What is bluetooth's rate of transmission?
Which of the following will happen when the force with which an object pushes down on the ground is equal and opposite to the force with which the ground pushes it up?
Object will move up
Object will move down
Object will move sideways
Object will remain stationary
When forces are balanced, the object remains stationary.
When the force with which an object pushes down on the ground is equal and opposite to the force with which the ground pushes it up, the object will remain stationary. This is because the forces are balanced, resulting in no net force and therefore no motion.
A(n)
is a material that takes in a wave when the wave hits it.
Answer: Refractors and absorbers.
Explanation: Almost every material takes in (at least a fraction) of a wave when a wave hits it, where some frequencies or wavelengths may have a bigger percentage taken in.
For electromagnetic waves, a perfect conductor will only reflect the incident wave, and every other case will absorb a part and reflect others.
The type of materials that are "good" by absorbing/transmitting waves are called refractors.
There are other materials called absorbers, but those ones are used for "particles", and you may recall that the light, an electromagnetic wave, can also be viewed as a particle.
The san andreas fault zone in california is an example of a ________ plate boundary.
The San Andreas fault zone in California is an example of a transform boundary. The movement of tectonic plates relative to each other make the plate boundaries.
What is plate boundary?Plate boundaries are region between two tectonic plates. Where the plates interact each other by moving past each other or slides away. There are three types of plate boundaries namely, convergent, divergent and transform plate boundaries.
In geology, a strike-slip fault is a crack in the Earth's crustal rocks when the rock masses slide past one another parallel to the strike. It is formed when a rock surface intersects with the surface or another horizontal plane.
The San Andreas Fault is thought to be the transform (strike-slip) border between two significant plates of the Earth's crust: the North American to the north and east and the Northern Pacific to the south and west. The San Andreas fault is a strike-slip fault because the Northern Pacific plate is passing the North American plate laterally in a northerly manner.
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The sun radiates most strongly at a wavelength of about 550 nm. a star that radiated most strongly at 400 nm would be
A star that radiates most strongly at 400 nm, a shorter wavelength than the Sun's peak at 550 nm, would be hotter according to Wein's Law.
The question concerns the relationship between the temperature of a star and the wavelength at which it radiates most strongly, based on Wein's Law. The Sun, with a surface temperature of approximately 5,800 K, radiates most strongly at about 550 nm, which is in the visible spectrum near the green-yellow part. A star that radiates most strongly at 400 nm, which is closer to the violet part of the spectrum, would be hotter than the Sun.
According to Wein's Law, the peak wavelength of radiation emission (a) is inversely related to the temperature of the emitting body (T), such that a * T = constant (where the constant is approximately 3 x 106 nm·K). Since 400 nm is shorter than 550 nm, the star with a peak emission at 400 nm must have a higher temperature than the Sun to satisfy the inverse relationship described by Wein's Law.
If the crate (drawn inside!) is moving at a constant speed in a straight line and the force applied is 310 N, what is the magnitude of the force of friction? 620 N, 155 N, 0 N, or 310 N ? ***not sure how to go about this:( thanks!!
What is the largest component of bog soil?
A driver in a car traveling at a speed of 26.8 m/s sees a deer 100 m away on the road. Calculate the minimum constant acceleration that is necessary of the car to stop without hitting the deer (assuming the deer does not move).
-4.20 m/s2
-1.75 m/s2
-2.89 m/s2
-3.59 m/s2
The energy of microwaves is less than the energy of ultraviolet light. Which comparison of the energies of electromagnetic waves is correct?
Answer:
Visible light has higher energy than infrared light because visible light has higher frequencies.
Explanation:
higher frequencies have a higher amplitude in turn having more energy.
If an atom has 34 protons and 40 neutrons, what is its atomic number?
A. 34
B. 74
C. 40
D. 6
the atomic number of an atom is equal to the number of protons the atom has
the answer would be A. 34