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iris [78.8K]
3 years ago
5

Which structure found in echinoderms can sometimes perform a similar function as a radula found in some mollusks? This Is A Scie

nce Question
A.foot
B.gill
C.mantle
D.stomach
Physics
2 answers:
kow [346]3 years ago
8 0

Answer: Foot.

Explanation:

Echinoderm means spiny skin. Some example of echinoderms are star fish, sea urchin, sand dollar.

These organisms have no eyes, no brains but they posses tube feet. This feet helps them in respiration, feeding and locomotion.

Tube feet helps in passing food to the oral cavity. This organ performs the similar function to radula in mollusks.

hammer [34]3 years ago
6 0
I think it’s D which is the stomach if not I can get you someone that can help you
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You lift a 10-N physics book up in the air a distance of 1.0 m, at a constant velocity
Anarel [89]

The book is lifted upward, but gravity points down, so the work done by gravity must be negative (so you can eliminate options 1 and 3).

The force exerted on the book by gravity has magnitude

<em>F</em> = <em>mg</em> = (10 N) (9.80 m/s^2) = 9.8 N ≈ 10 N

You raise the book 1.0 m in the opposite direction, so the work done is

<em>W</em> = (10 N) (-1.0 m) = -10 J

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3 years ago
Use the drop-down menu to complete the statement. Based on the field lines, the electric charges indicated by the question marks
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Answer: The same

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3 years ago
Read 2 more answers
Waves : Transfer of Energy
garri49 [273]

✒ Answer

In the case of still lake and ocean water how are they different in transferring energy from one location to another?

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7 0
2 years ago
A particle on a spring moves in simple harmonic motion along the x axis between turning points at x1 = 95 cm and x2 = 135 cm. (i
uranmaximum [27]

Answer:

(i) x = 115\,cm, (ii) x = 95\,cm, (iii) x = 95\,cm

Explanation:

(i) x_{1} and x_{2} represent the points where particle has a velocity of zero and spring reach maximum deformation, Given the absence of non-conservative force and by the Principle of Energy Conservation, the position where particle is at maximum speed is average of both extreme positions:

x = 115\,cm

(ii) Maximum accelerations is reached at x_{1} and x_{2}.

x = 95\,cm

(iii) Greatest net forces exerted on the particle are reached at  x_{1} and x_{2}.

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8 0
3 years ago
A 50kg chandelier hangs from a ceiling suspended by a cable.
babunello [35]

Answer:

The tension force has a magnitude of 490 N, and acts vertically upward

Explanation:

The complete question is:

A 50kg chandelier hangs from a ceiling suspended by a cable. What is the Tension (magnitude and direction of the force) in the cable?

ANS:

Tension is the force applied axially by rope, chain, cable, rod, etc, as a reaction force. The direction of tension is always towards the support. Since, the support here, is ceiling.

Therefore, the direction of tension force will be <u>vertically upward</u><u>.</u>

Since the chandelier is hanging stationary, without any motion. Thus, there must not be any unbalanced force applied on it.

Hence, the tension force must be equal to the weight of chandelier.

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<u>Thus, the tension force has a magnitude of 490 N, and acts vertically upward</u>

6 0
3 years ago
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