A light bulb burns out is a chemical or physical change ?
Do non metals have luster
A car approaches a police radar gun. how does the wavelength of the signal detected within the car compare with that emitted by the radar gun? the wavelength detected inside the car is longer. the wavelength detected inside the car might be shorter or longer depending on speed range. the wavelength detected inside the car is the same. the wavelength detected inside the car is shorter.
Noise caused by not understanding somebody's accent is considered:
A) semantic
B) temporal
C) internal
D)external
Answer:
semantic.
Explanation:
100% correct
What is the frequency corresponding to a period of 8.01 s?
The frequency corresponding to a period of 8.01 seconds is calculated using the formula f = 1/T, resulting in a frequency of approximately 0.125 Hz.
Explanation:The question relates to the concept of period and frequency in wave motion which is a topic in Physics. To find the frequency corresponding to a period of 8.01 s, you use the formula f = 1/T, where f is the frequency and T is the period. Applying this formula:
f = 1/T = 1/8.01 s ≈ 0.125 Hz
Therefore, the frequency corresponding to a period of 8.01 seconds is approximately 0.125 Hertz (Hz).
A formation of igneous rock on earth's surface is known as ______.
The rocks originated from cooled and crystallized magma flown from the volcanic eruptions on planet surfaces is called igneous rocks. They are also called magmatic rocks due to their formation from magma.
A formation of igneous rocks on the earth's surface is known as extrusive, or volcanic igneous rocks.
How igneous rocks are formed?They can be originated in the form of intrusive or extrusive manner. The lava from volcanic eruptions causes the deposition of cooled magma on Earth surfaces and that solidifies after sometimes resulting in the formation of extrusive igneous rocks.The extrusive igneous rocks are formed near or above planet surfaces while the intrusive forms below the planet surface because magma cools slowly in intrusive igneous formation compared to fast cooling of extrusive rock formation.Therefore, the appearance of igneous rocks on the earth's surface is known as extrusive igneous rocks.
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What do astronomers mean when they say that the universe is isotropic?
Which of these is NOT large and gaseous?
A) Jupiter
B) Mercury
C) Saturn
D) Uranus
If the sun were replaced by a 1-solar-mass black hole, what would be the gravitational pull of the black-hole "sun" on earth?
The gravitational pull that a 1-solar-mass black hole would exert on Earth is the same as the sun. This is because gravitational pull is determined by mass and distance. However, life on Earth would be greatly impacted due to the lack of sunlight and heat.
Explanation:If the sun was replaced by a 1-solar-mass black hole, the gravitational pull it exerts on Earth would be the same as that of the sun. This is due to the fact that gravitational pull is determined by mass and distance. Considering the mass would be the same and the distance between Earth and the black hole would remain constant, the gravitational pull remains unaffected.
However, without the sun's light and heat, life as we know it on Earth would not be sustainable. It's also important to note that while the gravitational pull remains the same, various other aspects of having a black hole instead of a sun would drastically impact our planet.
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What type of roadway has the highest number of hazards per mile?
The roadway with the highest number of hazards per mile is city roads and street.
The city has a high population of people, this is a combination of both men and women. These categories of people need vehicles to move around the city, they need it go to the office, school, markets and so on.
Due to the high number of individuals in the city there tend to be a high level of traffic, this can lead to accident or other type of road hazards.
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ANALOGY: Mars bar: planet as Milky Way: __________
Star cluster
Candy bar
Constellation
Galaxy
Subtitle is the half-life of an element is 10 years how many half-lives will it take before only about 6% of the original sample remains
Sasha uses a basketball and a tennis ball to represent two astronomical bodies based on their sizes. Which of the following representations is the most correct based on what Sasha has? The basketball represents Earth and the tennis ball represents the solar system. The basketball represents the moon and the tennis ball represents the solar system. The basketball represents the solar system and the tennis ball represents Earth. The basketball represents the solar system and the tennis ball represents the Milky Way.
Answer:
C
Explanation:
im doing the test rn but i think this is right correct me if im wrong also have a good day or night
Explain why a cow that touches an electric fence experiences a mild shock
Final answer:
A cow experiences a mild shock from an electric fence because its body conducts electricity, completing a circuit to the ground, which is designed to be unpleasant but not harmful. Modern electric fences use pulsed currents to allow detachment, with safety standards keeping shocks below the harmful threshold.
Explanation:
When a cow touches an electric fence, it experiences a mild shock due to the principles of electricity and current flow in living organisms. Our bodies, similar to the cow's, are good conductors because of the high water content. This conductivity allows electric currents to flow through us, following the path of least resistance to reach the ground, often referred to as 'earthing'. Electric fences are designed to give a shock that is unpleasant but not harmful, utilizing a small current that can cause a sensation but is usually not enough to damage tissue.
Modern electric fences are now pulsed on and off to allow someone who touches them to pull away. This design is vital for safety, preventing prolonged exposure that could lead to muscular contractions strong enough to prevent letting go of the fence. Shocks from electric fences are typically below 5 mA (milliamps), which is the maximum allowed shock according to many safety standards. This threshold ensures the shock is felt but remains within a range considered to be harmless.
Additionally, the earth acts as a natural electron sink, allowing currents to dissipate safely when an individual or animal completes the circuit by touching the fence while grounded. However, insulating materials such as rubber shoes can break this path, preventing the shock, which is why electrical safety protocols often include insulating gear to prevent the flow of electrical currents through the body.
A train travels 120 km In 2 hours and 30 minutes what’s its average speed
Explain why sound travels faster through iron than through air
Which type of radiation has a negative charge? alpha beta gamma which type of natural radiation is pure energy? beta alpha gamma which type of natural radiation has the most massive particles? gamma alpha beta?
The Beta particles are negatively charged. Electromagnetic Radiation is pure energy (Gamma). The largest particles are alpha.
What is radiation?Atomic and subatomic particles as well as waves, such as those that characterize X-rays, heat rays, and light rays, move as a result of radiation. All staff is constantly being bombarded by radiation of both types, coming from both cosmic and terrestrial sources.
This page describes the properties and behavior of radiation and the stuff it interacts with. It also describes how energy is transferred from radiation to its surroundings.
There is a lot of focus on the effects of such an energy transfer on living things, including the typical effects on several biological processes (e.g., photosynthesis in plants and vision in animals).
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What is an outward curving lens
An outward curving lens, or convex lens, converges light rays and is an essential element in optical devices like microscopes and cameras. It has a positive radius of curvature by convention. Convex lenses help correct farsightedness by focusing light rays onto a specific point.
An outward curving lens, also known as a convex lens or a converging lens, is a lens that is curved outward on both sides, resembling the intersection of two spheres. This type of lens causes parallel light rays to converge or come to a point after passing through it. The radius of curvature for a convex surface is positive by convention, which helps in the lens-maker's equation for calculating the focal length of the lens.
Convex lenses are widely used in various optical devices such as microscopes, telescopes, cameras, and eyeglasses to correct farsightedness by focusing light rays onto a specific point, resulting in a clear image.
A transformer has 20 turns in its primary coil and 60 turns in its secondary coil. The input voltage for the transformer is 25 volts. What is the output voltage?
Which organelles is used to transport materials through the cell
An arrow is shot vertically upward from a platform 33ft high at a rate of 214ft/sec. when will the arrow hit the ground? use the formula: h=−16t2+v0t+h0. (round your answer to the nearest tenth.)
A 10 - kg object is dropped from rest. after falling a distance of 50 m, it has a speed of 26 m/s. how much work is done by the dissipative (air) resistive force on the object during this descent?
The graph shows the solubility of different compounds at different temperatures. Solubility refers to how much of something will dissolve in the given amount of water at a particular temperature. ________ shows the greatest change in solubility over the temperature range shown. A) KBr B) KNO3 C) NaCl D) NaClO3
Answer:
b
Explanation:
From the graph, it is clear that potassium nitrate, KNO₃ undergo great change in solubility over the temperature range.
What is solubility?
Solubility of a substance is the fraction of its concentration which is dissolved in a solvent at a specified temperature. Solubility of a substance is dependent on the nature of both solute and solvent.
The factors which determine the solubility of a solute are its bond types, molecular weight, temperature and pressure. As the temperature increases, the intermolecular force attraction between solute molecules decreases leading to solvent- solute interaction results in greater solubility.
From the graph it is clear that solubility of KNO₃ changes rapidly with temperature. Whereas , other compounds dose not show this steep curve with increase in temperature. Thus option B is correct.
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What are the short eruptions of intense high-energy radiation from the sun's surface called? Corona Prominences Solar flares Sunspots
The answer is Solor flare, this is because this is a sudden eruption of energy that is magnetic on or even near the surface of the star, the sun.
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Explain how the "natural frequency" of objects must be considered/analyzed in places like concert halls and airplanes.
What is the focal length of a lens?
Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. Which lists the springs based on the amount of elastic potential energy, from greatest to least? X, Y, W, Z X, W, Y, Z Z, W, Y, X Z, Y, W, X
Answer:B
Explanation:
XWYZ
The wheel and axe is a modified incline plane
A.True
B.False
An ac generator with peak voltage 100 volts is placed across a 10-? resistor. What is the average power dissipated?
Strictly speaking, when an object acquires a positive charge by the transfer of electrons, what happens to its mass? (think small.)