Answer:
A
Explanation:
half life is the time taken for a radioactive isotopes to dissociate
Imagine that you are at the doctor's office and about to get a checkup. The doctor walks in and all of a sudden, your heart rate increases, mouth goes dry, etc. What system is causing this?
all of the above
parasympathetic nervous system
central nervous system
sympathetic nervous system
The parasympathetic nervous system and sympathetic nervous system are responsible for heart rate increasing and mouth going dry.
What is Autonomic nervous system?This is a part of the peripheral nervous system that regulates involuntary physiologic processes.
It is divided into two parts namely:
Parasympathetic nervous systemSympathetic nervous systemThey are responsible for involuntary actions which are mentioned above.
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What would happen if a nuclear power plant blew up?.
Answer:
look at Chernobyl it is a nuclear power plant that blew up
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The scientific name is: Enteroctopus dofleini
The diet of the octopus is: Young giant Pacific octopus feeds on dead animals and is characterized as a “neustonic feeder.” Adult preys on crustaceans, such as shrimp, crabs, scallops, clams, as well as other mollusks, flatfishes, redfish and smaller octopods.
The range is: Giant Pacific octopus occurs along the Pacific coast from Southern California north to Alaska and across to Japan. It is found in habitats that range from shallow tidal pools to ocean depths of about 4,920 feet (1500 m). It is most abundant in shallow waters to 16 feet (5 m) deep.
The charecteristics are: bulbous heads, large eyes, and eight very useful arms.
5 facts are:
1. Giant Pacific octopuses can grow to 29.5 feet (9 m) wide from the tip of one arm to the tip of another and 44 pounds (20 kg).
2. Giant Pacific octopuses can change color in one-tenth of a second.
3. Giant Pacific octopuses can be found more than 330 feet (100 m) underwater.
4. Female giant Pacific octopuses never leave their eggs during the brooding process and die shortly after from self-cannibalization.1
5. Female giant Pacific octopuses lay 18,000 to 74,000 eggs that are the size of a grain of white rice.
Human impact: Not only can squids and octopuses sense sound, but as it turns out, these and other so-called cephalopods might be harmed by growing noise pollution in our oceans—from sources such as offshore drilling, ship motors, sonar use and pile driving.
Reproduction: Giant Pacific Octopus Reproduction. After about two years, the female will seek out a male for her one time to reproduce and lay eggs. Once she finds a male, he will deposit a sperm packet into the female's mantle. The female will then store the sperm packet until she is ready to fertilize eggs.
Migration: The medium to large pacific giant is believed to go through a migratory stage in which it migrates from shallow to deep water and back again, the migratory cycle runs as follows: shallow water October-November/deep water February-March/shallow water April-May/deep water August-September.
How many opportunities does a candidate have to pass the test ?
Answer:
Nearly half of California’s potential teachers struggle to pass a gauntlet of standardized tests required for them to earn a credential, making it more difficult for the state to put a dent in a persistent teacher shortage.
From what three regions do most of the small objects in the universe come?
Answer:
Scientists who study the Sun usually divide it up into three main regions: the Sun's interior, the solar atmosphere, and the visible "surface" of the Sun which lies between the interior and the atmosphere. There are three main parts to the Sun's interior: the core, the radiative zone, and the convective zone.
Explanation:
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The majority, but not all, asteroids are found in the area between Mars and Jupiter, where countless other tiny rocky planets circle the sun. Some asteroids are members of groups that originated from bigger parent bodies that were broken in previous impacts with other asteroids.
What is the significance of small objects in the universe?The small objects in the universe may provide information about planet Earth, as well as the formation and evolution of the solar system, because some of these objects are thought to be only slightly altered from their original state in the young solar nebula from which the planets formed,
The bulk of asteroids are situated between Mars and Jupiter, while countless other small rocky planets orbit the sun.
Therefore, some asteroids belong to groups that descended from larger parent bodies that were shattered in past collisions with other asteroids.
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Why can we hear sounds outside of a door when music is playing on the inside?
A solid metal bar is at rest on a horizontal frictionless surface. It is free to rotate about a vertical axis at the left end. The figures below show forces of different magnitudes that are exerted on the bar at different locations. In which case does the bar’s angular speed about the axis increase at the fastest rate?.
The case where the angular speed of the bar will increase at a fast rate is at smaller radius compared to the initial radius from the center of rotation.
Conservation of angular momentumThe principle of conservation of angular momentum states that the total angular momentum of a closed system is always conserved.
[tex]I_i \omega _i = I_f \omega _f[/tex]
where;
Ii is initial moment of inertia of the solid sphereIf is the final moment of inertia of the solid sphereωi is the initial angular speed ωf is the final angular speed[tex]\omega _f = \frac{I_i \omega _i }{I_f} \\\\\omega_f = \frac{(1/2MR_i^2)\omega _i}{1/2 MR_f^2}\\\\\omega _f = \frac{R_i^2 \omega _i}{R_f^2}[/tex]
where;
M is mass of the barR is radiusThe angular speed of the bar depends of the moment of inertia of the bar which in turn depends on axis of rotation.
Thus, the case where the angular speed of the bar will increase at a fast rate is at smaller radius compared to the initial radius from the center of rotation.
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1. What kind of wave is in the picture above?
2. Label the following parts of waves above:
Rarefaction, compression, wavelength, direction of wave
Answer:
1.The above wave is a longitudinal wave, sound wave to be precise.
2. Concerning the labelling, the arrow at the top left corner is the RAREFACTION, the arrow at the top right corner is the COMPRESSION, the two arrows joined together depicts the WAVELENGTH. The horizontal arrow below is the DIRECTION OF THE WAVE.
Answer: 1. Longitudinal wave
Explanation: 2. See attachment
why has si system been developed? give reasons
Answer:
It allows people in different places and different countries to use the same units, avoid mistakes and understand each other more easily. The common base 10 of all units makes it easier and has more accurate calculations that are made without cumbersome conversion factors.
Answer:
Explanation:
As we know that the SI units are extended versions of the MSK system. SI system helps us to calculate the appropriate measurement of any quantity. SI system is convenient(easy) to use and it is also followed all over the world which can help in international trade as well. So, SI system been developed.
Please help in this file below
Answer:
B. South East
Explanation:
What are real and virsual image explain with the help of examples
Here is your Answer:-
In optics, an image is defined as the collection of focus points of light rays coming from an object. A real image is the collection of focus points made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. In other words, a virtual image is found by tracing real rays that emerge from an optical device (lens, mirror, or some combination) backward to perceived or apparent origins of ray divergences. In diagrams of optical systems, virtual rays are conventionally represented by dotted lines.
Because the rays never really converge, a virtual image cannot be projected onto a screen. In contrast, a real image can be projected on the screen as it is formed by rays that converge on a real location.
wht is error of parallax?
Answer: A parallax error is an apparent shift in an object's position as it is viewed from different angles. For example, the error is most easily noticed by looking at a nearby object with one eye closed, then looking at it through the other eye.
Explanation: Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby objects show a larger parallax than farther objects when observed from different positions, so parallax can be used to determine distances.
A 12.0 kilogram mass weighs 84.0 newtons on a newly discovered planet. What is the magnitude of the acceleration due to gravity on this planet?
Answer:
12.0x84.0=1,008
Explanation:
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good morning to you all! someone please answer this, ill give you brainliest and you will earn 50 points.
Natural hazards do not have to be natural disasters. What are some of the ways modern technology can help prevent future natural disasters?
Satellite imaging to make future disaster predictionMonitoring seismic activity using seismographsSatellite imaging helps in predicting disasters like hurricane. Before hurricane, the satellite can help detect the movements in ocean.
Seismographs are the devices that respond to the ground shaking before volcanic eruption, earthquake and explosions.
The correct ones are
Satellite imaging to make future disaster predictionMonitoring seismic activity using seismograph.The reasons are
Satellite imaging can find out the current weather status by which we can be warned about Tsunami,cyclones etc. Seismic waves monitoring can help us to find out at where the next earth quake going to happenwhy freezer is made in the upper part of refrigrator
why freezer is made in the upper part of refrigrator
✒ Answerthe cold air produced from it is denser than the warmer air in the bottom
ExplainationFreezer is normally provided at the top of the refrigerator, because density of the cold air is high compared to the hot air. In a refrigerator the air contacts with the cooling coil and gets cooling.Because of the high density the cold air gets down and the warm air/hot air moves upward and gets cooling from the cooling coil/evaporator coil. This process is repeated. If the Freezer is provided at the bottom place of the refrigerator, the cold air can't to move full area of the refrigerator. So the freezer is normally provided at the top at the refrigerator
A meter stick with a mass of 0.65 kg is held perpendicular to a vertical wall by a cord of length d = 4.8 m attached to the end of the meter stick and also to the wall above the other end of the meter stick. (a) Determine the tension in the cord.
With the mass of the meter stick at 0.65 kg and the length of the cord at d = 4.8 m, The tension in the cord is mathematically given as
T=1.756
What is the tension in the cord.?Question Parameters:
A meter stick with a mass of 0.65 kg
a cord of length d = 4.8 m
Generally, the moment at point A is mathematically given as
mg(0.5)=[tex]tcos\theta x(1)[/tex]
[tex]Tcos\theta=0.35*9.81*0.5[/tex]
Where
[tex]\theta=sin^{-1}(1/4.8)\\\\\theta=12.02[/tex]
Hence
[tex]Tcos\theta[/tex]=0.35*9.81*0.5
Tcos(12.02)=0.35*9.81*0.5
T=1.756
In conclusion, the tension in the cord is
T=1.756
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When using the lens equation, a negative value as the solution for di indicates that the image is real. Virtual. Upright. Inverted.
Option B is correct. A negative value as the solution indicates that the image is Virtual.
What is the lens equation?The Lens formula describes the relationship between the distance of an image (v), the distance of an object (u), and the focal length (f) of the lens in optics.
The lens equation is given below;
[tex]\frac{1}{v}-\frac{1}{u}=\frac{1}{f}[/tex]
When light beams from the same spot on an item reflect off a mirror and diverge or spread apart, virtual pictures are formed.
Hence option B is correct. A negative value as the solution indicates that the image is Virtual.
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Answer:
B. Virtual
Explanation:
Edge 2023
Select the correct answer. What is the main function of a telescope? A. It brings scientists closer to distant objects. B. It magnifies light received from distant objects. C. It measures the temperature of distant objects. D. It measures the wavelengths of incoming light rays.
Answer: A. It brings scientists closer to distant objects.
Explanation:
When light from infinite coming toward the lens of the telescope then this light is converge at the focal plane of the lens. This will image which is formed at the focal plane worked as an object for another lens of the telescope.
Now another lens made the final virtual image which is seen by the observer.
So here in this whole process the main working of Telescope is to form the image of a distant object near to the eye of an observer. So the light coming from the infinite distance is collected together and then a bright image is formed by that light so that observer is able to see the image clearly
so here correct answer would be
A. It brings scientists closer to distant objects.
Answer:
Answer: A. It brings scientists closer to distant objects.
Explanation:
someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
E) All of the above
Explanation:
PLEASE MARK ME AS BRAINLIEST
Answer:
I believe it's number 2 not for sure.
Explanation:
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I don't understand..
Explanation:
What's the requirements
A and C must be equalWhy?
F_net=Total upward force-Total downward force=0NSo box remains on groundAnd
B must be less than DOption A is correct
What is the elastic potential energy of a spring with a 80 N/m spring constant
that has been moved 0. 6 m from equilibrium?
HELP!!!
Two new planets are discovered, planet X and planet Y. The planets have identical volumes, but the mass of planet X is two times greater than the mass of planet Y. If two identical space ships land on each planet, which of the following will be true?
The weight of the space ship on planet X will be greater than the weight of the space ship on planet Y.
The mass of the space ship on planet Y will be greater than the mass of the space ship on planet X.
The mass of the space ship on planet X will be greater than the mass of the space ship on planet Y.
The weight of the space ship on planet Y will be greater than the weight of the space ship on planet X.
The weight of the space ship on planet X will be greater than the weight of the space ship on planet Y because mass is directly proportional to weight.
What is directly proportional?Directly proportional means if one factor is increases the other will automatically increases and vice versa so we can conclude that The weight of the space ship on planet X will be greater than the weight of the space ship on planet Y is the correct answer.
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What type of galaxy is pictured? (4 points)
1. Irregular
2. Spiral
3. Lens
4. Elliptical
Answer:
Elleptical
Explanation:
An elliptical galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. They are one of the four main classes of galaxy described by Edwin Hubble in his Hubble sequence and 1936 work The Realm of the Nebulae, along with spiral and lenticular galaxies
Find the current produced when a voltage of 60 V is applied to a resistance of 15 Ω? What is the equation?
Answer:
V = IR
Explanation:
V = voltage
I = current
R = resistance
A gust of wind blows parallel to a window with area 2.5m2.. Assume the pressure inside the house is at atmospheric pressure and that the gust reaches 30 m/s. Which answer most closely approximates the force on the window
Assuming that the pressure inside the house is at atmospheric pressure, the force on the window is approximately 1378 Newtons.
Given the data in the question;
Area of the window; [tex]A = 2.5m^2[/tex]Velocity of wind; [tex]V = 30m/s[/tex]Force on the window; [tex]F = \ ?[/tex]
ForceForce is an influence that can cause the change of motion of a particle or object. Also, force normal to the area of a surface is equal to pressure multiply by the area of that surface.
[tex]F = P * A[/tex]
Where P is pressure and A is area of the surface.
Also, we know that;
[tex]Pressure \ P = \frac{D_{air}V^2}{2}[/tex]
Where [tex]D_{air}[/tex] is density of air, approximately( [tex]1.225 kg/m^3[/tex] ) and V is velocity.
Hence
[tex]F = P * A\\\\F = \frac{D_{air}V^2}{2} * A[/tex]
We substitute our values into the equation above
[tex]F = \frac{D_{air}V^2}{2} * A\\\\F = \frac{1.225kg/m^3*(30m/s)^2}{2} * 2.5m^2\\\\F = 551.25 kg/ms^2 * 2.5m^2\\\\F = 1378.13 kgm/s^2\\\\F = 1378N[/tex]
Therefore, Assuming that the pressure inside the house is at atmospheric pressure, the force on the window is approximately 1378 Newtons.
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can someone please answer this, ill give you brainliest and your earning 50 points.
Answer:
Good morning! It's D. all of the above
Explanation:
Social backgrounds, culture, politics, education and economic reasoning might equally contribute to uncontrolled settlements. People live in disaster-prone areas partly for economic reasons. In the case of Semarang, where tidal flooding submerges houses, people stay due to economic factors.
Plus I took the test and got it right
_AnnieTheDreamGirl, 3/10/2022
What are reasons people settle in areas that are prone to natural disasters?
O avaliability of natural resources
There's an abundance of natural resources around the area prone to natural disastersO proximity (nearness) to water (rivers, ocean, etc.)
Due to frequent occurrence of disasters,the water flows down to many places and settle there forming many rivers and lakes and pondsO abundance of fertile soil
Some places where there's an eruption or erosions tend to have fertile soil rich in mineralsO all of the above ✓
brainly A bicycle wheel has a diameter of 64.0 cm and a mass of 1.80 kg. Assume that the wheel is a hoop with all the mass concentrated on the outside radius. The bicycle is placed on a stationary stand, and a resistive force of 120 N is applied tangent to the rim of the tire. (a) What force must be applied by a chain passing over a 9.00-cm-diameter sprocket in order to give the wheel an acceleration of 4.50 rad/s2
For a bicycle wheel has a diameter of 64.0 cm, a mass of 1.80 kg and a resistive force of 120 N, The force must be applied by the chain is mathematically given as
F=862.413N
What force must be applied by a chain passing over a 9.00-cm-diameter sprocket in order to give the wheel an acceleration of 4.50 rad/s2?Generally, the equation for the Inertia is mathematically given as
I=0.5mr^2
Therefore
I=0.5(1.8)(0.32)^2
In conclusion
Znet=0.091*4.49
Znet=0.4086N.m
Hence
[tex]x*\frac{0.09}{2}-120*0.32=Znet\\\\x*\frac{0.09}{2}-120*0.32=0.4086[/tex]
F=862.413N
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Why is the moon’s gravitational force less than the earth’s gravitational force
Answer:
no idea
Explanation:
i have absolutely no idea
What variables go into preventing injury ?
Answer:
Here below are some basic measures to take in order to avoid a sports injury: Make a training routine that contains exercise, strength training, and flexibility exercises. This will help to lower your risk of injury. Exercising different muscle groups every other day is a good idea.
Science
Imagine you accidentally touched a hot stove. Explain how you
would react in the short term and long term, and describe what body
systems would be involved in your behavioral response.
Answer:
Your human reflexes would pull your arm away extremely fast, and you'd be left in pain, this is your nervous system at work. In the long term, you'd be very cautious about stoves
Explanation:
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