Are the tube feet at the tip of the arm the same as those further down the arm? why might this be?
Answers
No,
The tube feet at the tip of the arm in certain echinoderms, such as starfish, are not the same as those further down the arm.
The tube feet at the tip of the arm, called terminal tube feet, typically differ in structure and function from the tube feet found along the rest of the arm.
The terminal tube feet are usually longer, more flexible, and have specialized features compared to the tube feet further down the arm. They are often involved in more delicate tasks, such as manipulating and capturing prey, as well as sensing the environment. These tube feet may have sensory structures, such as chemoreceptors, tactile receptors, and light-sensitive cells, that help the echinoderm gather information about its surroundings.
The differentiation of terminal tube feet serves specific functional purposes. By having specialized tube feet at the tip of the arm, echinoderms can enhance their ability to locate and capture food, navigate their environment, and interact with objects. This differentiation allows for greater versatility and adaptability in performing various tasks necessary for survival and ecological interactions.
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Related Questions
A butterfly moves with a speed of v = 12.0 m/s. the x-component of its velocity is 8.00 m/s. the angle between the direction of its motion and the y-axis must be ___________ degrees.
Answers
The angle between the direction of its motion and the y-axis is 41.8⁰.
Angle between the direction of its motion and x axis
The angle between the direction of its motion and x axis is calculated from the formula of horizontal component of the velocity.
Vx = Vcosθ
where;
Vx is the horizontal component of the velocityV is the velocity8 = 12 x cosθ
cosθ = 8/12
cosθ = 0.6667
θ = arc cos(0.6667)
θ = 48.2⁰
angle between the direction of its motion and the y-axisθ_y = 90 - 48.2⁰ = 41.8⁰
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A force of 20N is used to accelerate a 250g mass. What is it’s acceleration
Answers
F = 20 N
m = 250 g = 0.25 Kg
a = ?
SolutionUsing Newton's 2nd Law
F = maa = F/m
a = 20/0.25
a = 80 m/s²
The acceleration of an object with a mass of 250 grams or 0.250 kg and force applied of 20N is 80m/s².
What is Acceleration?Acceleration is the rate of change of velocity of an object. Acceleration means the speed of the object is changing, but not always. When an object moves in a circular path at a constant speed rather than variable, it is still accelerating, because the direction of its velocity is changing. It is a vector quantity as it has both the magnitude and direction. The SI unit of acceleration is meter per second (m/s²).
According to the formula,
f = m × a
f = force,
m = mass of the body,
a = acceleration of the body
f = 20N
m = 250 grams = 0.250kg (1kg = 1000grams)
f = m × a
a = f/ m
a = 20N/ 0.250kg
a = 80m/s²
The acceleration of the body is 80m/s².
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how do animal use upthrust in their daily life
Answers
Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.
Upthrust explained
Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.
Some animals such as fish use upthrust to move and maintain their position in water. Fish have swim bladder which help them to maintain buoyancy.
Some birds such as pelicans use upthrust to dive and swim in water. They have air sacs filled with air which help to reduce buoyancy and also help their buoyancy.
Insects use upthrust to move in the air.
Overall, animals use upthrust to move and maintain their position.
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2kg of water at 30 C is poured into a 1kg copper beaker at 20 C.
What will the temperature of the water and copper beaker be together?
Answers
The temperature of the water and copper beaker be together is 29.6⁰C.
What is the equilibrium temperature of both substance?
The final temperature or equilibrium temperature of the water and copper beaker is calculated by applying the principle of conservation of energy.
Heat lost by the water = Heat gained by the copper beaker
mcΔθ (water) = mcΔθ (copper)
where;
m is massc is specific heat capacityΔθ is change in temperaturem₁c₁(T₁ - T) = m₂c₂(T - T₂)
where;
T₁ is the initial temperature of waterT₂ is the initial temperature of copper beakerT is the equilibrium temperatureSpecific heat capacity of copper, c₂ = 389 J/kgK
Specific heat capacity of water , c₁ = 4200 J/kgK
(2)(4200)(30 - T) = (1)(389)(T - 20)
252,000 - 8400T = 389T - 7780
259,780 = 8789T
T = 259,780 /8789
T = 29.6⁰C
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what is the radius of the event horizon for a black hole with a mass of 7.0 times the mass of the sun
Answers
R=20,751m
What indicates that two objects are in thermal equilibrium?
Responses
The objects' temperatures are changing.
The objects' temperatures are changing.
The objects are the same size.
The objects are the same size.
The objects have the same temp
Answers
Answer:
Option (c) is the correct answer.
Explanation: When two substances does not exchange any energy with each other then they are said to be in thermal equilibrium with each other. This means the temperature of both the substances will be equal, that is why, there is no exchange of energy between them. Thus, we can conclude that when the objects have the same temperature then you can tell the two objects are in thermal equilibrium.
A neutral oxygen atom has 8 protons and 8 electrons. It gains 2 electrons when it chemically combines with magnesium to form magnesium oxide (MgO). What is the charge of oxygen in magnesium oxide?
Answers
Answer:
in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing.
Explanation:
When oxygen is mixed in a chemical reaction, it acquires two electrons from magnesium, to become an ion with 2 negative .
Mg + O → MgO
Therefore, in this ionic compound, oxygen has 2 excess electrons and magnesium has two electrons missing
What are 5 examples of implied powers?.
Answers
Declaring war, levying taxes, regulating commerce, minting money, and controlling immigration are five instances of implied powers.
Political authority provided to the United States government that isn't expressly defined in the Constitution is known as implied power. Due to precedents established by other authorities, it is assumed that these will be given. Any particular governmental body can't operate without these implicit capabilities.Examining whether the Necessary and Proper Clause included a power to create a national bank from Congress's authority to levy and collect taxes, borrow money, regulate trade, declare and carry out wars, and build and sustain armies and navies.There is no explicit mention of implied powers in the Constitution. They stem from Congress's authority to enact any laws that are "necessary and proper" to execute its specified powers. This line, which is part of Article I, Section 8, is sometimes referred to as the elastic clause since it extends Congress's power.Thus these are the five examples of implied powers.
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How long does it take a bicycle to travel 100 m if it goes a speed of 15 m/s?
Answers
The time taken for the bicycle to travel the given distance at the given velocity is 6.667 seconds.
Given the data in the question:
Distance travelled by the bicycle; \(S = 100m\)
Speed or velocity of the bicycle; \(v = 15m/s\)
Time taken for the bicycle to travel the given distance; \(t = ?\)
We know that speed is the rate of change of position of an object with respect to time.
That is to say, Speed = Distance / Time
Hence, Time = Distance / Speed
\(t = \frac{S}{v}\)
So, to get our time "t", we simply substitute in our given values
\(t = \frac{100m}{15m/s}\)
\(t = 6.667 s\)
Therefore, the time taken for the bicycle to travel the given distance at the given velocity is 6.667 seconds.
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a car starts from rest and travels for 3.4s with a uniform acceleration of 17.0 m/s. what is the final velocity of the car
Answers
Answer:
Explanation:
57.8 m/s
how to find frictional force with the coefficient of friction
Answers
To find the frictional force using the coefficient of friction, multiply the coefficient (μ) by the normal force (N). The coefficient of friction represents the ratio of the force of friction between two surfaces, while the normal force is the force pressing the surfaces together.
The resulting frictional force (Ff) can be calculated using the equation Ff = μ * N. It's important to consider that the frictional force acts in the opposite direction of the applied force or the tendency of motion.
Determine the coefficient of friction (μ): The coefficient of friction is a dimensionless value that represents the ratio of the force of friction between two surfaces to the normal force pressing them together. It depends on the nature of the surfaces in contact. The coefficient of friction is typically denoted as μ.
Identify the normal force (N): The normal force is the force exerted by a surface perpendicular to the contact surface. It is equal to the weight of the object or the force pressing the surfaces together.
Calculate the frictional force (Ff): The frictional force can be calculated using the equation:
Ff = μ * N
Multiply the coefficient of friction (μ) by the normal force (N) to obtain the frictional force (Ff).
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6. The transfer of thermal energy by radiation does not require matter.
O True
O False
Answers
Answer:false
Explanation:
what does the 4 mean in 4Cu(NO3)2
1) subscript 2) exponent 3) multiplier 4) coefficient
Answers
Answer:
4) Coefficent in science
why might your slants both look the same now hat they have been stored in the refrigerator for a week
Answers
It is possible that both slants look the same after being stored in the refrigerator for a week because the low temperature has slowed down or halted bacterial growth, leading to no observable changes in the appearance of the bacteria on the slants.
Additionally, if the slants were prepared using the same strain of bacteria, it is expected that they would look similar even after a week of storage.
However, it is important to note that without further analysis such as culturing the bacteria, it cannot be determined if they are still viable or have lost their ability to grow.
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What do all waves in the electromagnetic spectrum have in common?
• A. They have the same distance between crests.
• B. They have the same frequency.
C. They have the same rate of motion
• D. They have the same energy.
Answers
Answer: C. They have the same rate of motion.
Explanation:
A gradient wind blowing around the low-pressure center is constantly accelerating because it is constantly changing directions. This is called ____.
Answers
A gradient wind blowing around the low-pressure center is constantly accelerating because it is constantly changing directions. This is called centripetal acceleration.
Centripetal acceleration is the rate at which a body moves through a circle.
Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, the speed, and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.
The circle's center is where the acceleration is pointed radially. The square of the body's speed along the curve divided by the radius (r) of the circle from the moving body's center determines the centripetal acceleration (ac); is v²r.
Units for centripetal acceleration are metres per second squared. The force creating this acceleration, known as the centripetal force, is also pointed in the direction of the circle's center.
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A patient has a temperature of 38.5 °C. What is the temperature in degrees Fahrenheit? Group of answer choices a.311 °F b.126.9 °F c.70.5 °F d.11.7 °F e.101.3 °F
Answers
A patient has a temperature of 38.5 °C. The temperature in degrees Fahrenheit is e.101.3 °F.
To convert a temperature from degrees Celsius (°C) to degrees Fahrenheit (°F), you can use the following formula:
°F = (°C × 9/5) + 32
In this case, the patient has a temperature of 38.5 °C. Applying the formula, we have:
°F = (38.5 × 9/5) + 32
°F ≈ (69.3) + 32
°F ≈ 101.3
So, the patient's temperature in degrees Fahrenheit is approximately 101.3 °F. Therefore, the correct answer among the choices provided is option e.101.3 °F.
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a 100kg car travels at 2m/s. what is the momentum in kg
Answers
Answer:
200 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 100 × 2
We have the final answer as
200 kg.m/sHope this helps you
explain the working principle of inverter
Answers
An inverter is an electrical device that transforms DC (direct current) to AC (alternating current). An inverter's operation is based on the assumption of electronic switching.
An inverter is made up of three major components: a direct current input source, an oscillator, and an output transformer. The oscillator produces a high-frequency alternating current signal, which is subsequently supplied to the output transformer. The output transformer subsequently raises the voltage of the alternating current signal to the required level.
A battery or a DC power supply can be used as the DC input source. The oscillator is commonly a transistor or a collection of transistors that alternately turn on and off the DC input at a high frequency. The output transformer has two or more copper coils, and the ratio of the coils determines the voltage of the output signal.
When the DC input is turned on, the oscillator begins to create the high-frequency alternating current signal, which is then delivered into the output transformer. The transformer amplifies the voltage of the alternating current signal and generates the alternating current output.
This is the working principle of Inverter.
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I need help lease. I will mark you brainliest
Answers
Answer: 43.5
and now I'm typing cause it said the answer had to be at least 20 characters
if when the sun comes out a road expands more than the dirt it is on it means
Answers
Answer:
the road has a larger coefficient of linear expansion than the dirt
One of your classmates has placed a block in water and it floated halfway like the block shown
on the left. If you wanted to make a block float like the one shown on the right, what could you
do? Write a check mark next to all the actions you can take to make a solid block float so that it
most of it is below water like the block pictured on the right. Be sure to explain your thinking for
each action you check mark.
Use a larger block made out of the same material
Use a smaller block made out of the same material.
Use a block of the same size made out of a denser material.
Use a block of the same size made out of a less dense matenal
Add more water to the tank so it's deeper
Attach a weight to the block
Answers
To make a solid block float so that it most of it is below water like the block pictured on the right.
We have to take the following actions-
Utilize a larger block made out of the same material: This might not work as expanding the measure of the square will moreover increment its weight, which seem cause it to sink.Utilize a smaller block made out of the same material: This might work as a littler square will have less weight and thus, might coast with more of it underneath water.Utilize a block of the same size made out of a denser material: This might work as a denser fabric will have more weight, which may offer assistance it drifts with more of it below water.Utilize a square of the same estimate made out of a less thick material: This is often the finest alternative as a less thick fabric will have less weight and consequently, will coast with more of it underneath water.Include more water in the tank so it's deeper: This might not work as including more water will as it was incrementing the profundity of the water and not alter the buoyancy of the piece.Attach a weight to the block: This might not work as connecting a weight to the square will as it was incrementing its weight, which may cause it to sink.To learn more about block,
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Please help me with this
Answers
Answer:
I can't really see it sorry
3. If you were in a car collision, would you rather be hit by Vehicle 1 (2,027 kg) or Vehicle 2 (1,415 kg) from Activity 73? Explain.
Answers
Answer:
I say vehicle one, because both will apply the same amount of force but, because vehicle two has less mass, it will accelerate more rather than vehicle one which will accelerate less.
Does sound travel faster in a warm room or a cold room? Explain your answer.
Answers
Answer:
The speed of sound is greater in hot air than it is in cold air. This is because the molecules of air are moving faster and the vibrations of the sound wave can therefore be transmitted faster. This means that when sound travels from hot air to cold air or from cold air to hot air it will refract.
Explanation:
Hope this will be help!
10. How does surface area affect the amount of air resistance an object experiences?
Answers
Answer:cross-sectional area, and thus surface area, increases the amount of air resistance an object experiences
Explanation:
If we have a velocity of 20 m/s and our acceleration is -5 m/s, then after 2 seconds our velocity will be....
a) 15 m/s
b) 40 m
c) 10 m/s
d) -10 m/s
Answers
Answer:
v = 10 m/s
Explanation:
We have,
Our initial velocity is 20 m/s
Our acceleration, \(a=-5\ m/s^2\)
It is required to find the velocity after 2 seconds. It is a concept based on equation of kinematics. Using first equation:
\(v=u+at\)
Plugging all the known values
\(v=20+(-5)(2)\\\\v=10\ m/s\)
So, our final velocity is 10 m/s.
a coil used to produce a magnetic field for an electron beam experiment has 200 turns and a radius of 12 cm. what current is needed to produce a magnetic field with a magnitude of 5 x 10^-3 t at the center of a coil?
Answers
4.78 A is current needed to produce a magnetic field with a magnitude of 5 x 10^-3 t at the center of a coil.
\(B=\mu_0nI/2R\) magnetic field due to current carrying at centre.
\([B=5*10^-3T],[n=260],[R=12 cm=0.12 m],[\mu_0=4\pi*10^-7T,m/A]\)
\([I=(B2R/\mu_0n.],[I=5*10^-3* 12 *10^-2/2*10^2*4\pi*10^-7 A.],[I=(15 xx10^(-7)*10^7 A/314],[I=4.78A]\)
When a conductor is connected to a fluctuating magnetic flux, it induces closed loops of electric currents known as eddy currents. They create closed circuits in a plane perpendicular to the magnetic field and are subject to Faraday's law of electromagnetic induction. These currents will flow in a direction that opposes the shift required by the Lenz law.
Eddy currents are created when a conductor is traveling through a magnetic field or when the magnetic field around a conductor at rest changes over time. They arise from variations in the strength and direction of a conductor-linked magnetic field or magnetic flux.
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shawn is traveling away from you at a speed of 120 km/hr. he throws a baseball that, according to him, is going at 100 km/hr in your direction. what do you see the ball doing? shawn is traveling away from you at a speed of 120 km/hr. he throws a baseball that, according to him, is going at 100 km/hr in your direction. what do you see the ball doing? you see the ball traveling away from you at 20 km/hr. you see the ball traveling away from you at 100 km/hr. you see the ball traveling away from you at 220 km/hr. you see the ball traveling away from you at 120 km/hr. you see the ball traveling toward you at 20 km/hr.
Answers
The correct answer is that you see the ball traveling toward you at 20 km/hr.
This question deals with the concept of relative velocity, where the velocity of an object is measured with respect to a reference frame. In this case, you and Shawn are in different reference frames, and you need to calculate the velocity of the ball in your frame of reference.
Since the ball is thrown in the opposite direction to Shawn's movement, its velocity with respect to you would be the difference between the velocity of the ball with respect to Shawn and the velocity of Shawn with respect to you.
The velocity of the ball with respect to Shawn is given as 100 km/hr in the direction towards you. The velocity of Shawn with respect to you is given as 120 km/hr away from you. Therefore, the velocity of the ball with respect to you would be 100 km/hr - 120 km/hr = -20 km/hr.
The negative sign indicates that the ball is moving in the opposite direction to Shawn's motion, and the magnitude of 20 km/hr indicates that the ball is moving towards you at a speed of 20 km/hr. Therefore, you see the ball traveling toward you at 20 km/hr.
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1.
You just earned a $1000 bonus at your job. Would you rather receive all the money at the end of the
year or half the money now and half the money later? Why?