Tunicates resemble a _____ on the sea floor. rod square sac hole

Answers

Answer 1

Answer:

Answer: sac

Tunicates are sea squirts that are found in the marine water. These animals remains attached to the rocks and the sea beds. They exhibit a body shape which looks like a barrel. The barrel has two openings called as siphons. These siphon helps in the intake of the food particles and oxygen. These animals look like sac on the sea floor.

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Validity is __________.a. concerned with the relationships of random error with systematic error. b. equal to the true score plus the systematic error. c. equal to the true score plus systematic error minus random error. d. concerned with the extent to which differences in scores reflect true differences in the characteristic. e. concerned with the extent to which differences in scores reflect instability in the measurements.

A car climbs 10.0 kilometers up a hill that inclines 8.0 degrees. What is the car's vertical displacement?

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$s=10km\n\alpha=8^o\n\ny=?\n\\sin\alpha=(y)/(s)\Rightarrow y=s\sin\alpha\n\ny=10\sin8^o\n\ny=10\cdot 0,1392\n\n\y=1,392km$

If We Start With 400 Atoms of a Radioactive Substance, How Many Would Remain After One Half-life ?

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If it's half life, that means that half of the atoms have died out. Therefore, 200 atoms have died, so there are 200 atoms left (exactly one half of 400)

200, the half life of a radioactive substance is pretty simple to remember. It is literally cutting it in half, however, don't make the same mistake I did in this subject, the second half life does not reduce it to 0, it reduces it to 100. It just keeps half-lifing over and over again. For example: 400 atoms after one half life:200, after two: 100, after 3, 50, and so on.

As a moving object's velocity decreases, its momentum decreases.Please select the best answer from the choices provided
T
F

Answers

Explanation :

The momentum of an object is defined as the product of its mass and the velocity with which it is moving. It is denoted as p.

Mathematically, it is written as :

$p=mv$

m is the mass of an object

v is the velocity

So, it is clear that the momentum of an object is directly proportional to its velocity.

The statement "as a moving object's velocity decreases, its momentum decreases" is absolutely true.

From the choices provided, the better answer is 'T'. The other one does not apply.

How do charges move through an insulated wire connected across a battery? Use the terms potential difference, current, conductor, and insulator in answer.

Answers

The battery has both a positive side and a negative side. The potential difference will be the potential of the positive end of the battery minus the potential of the negative end, which will result in positive potential, or power. This potential is what gives the electrons the ability to flow from the positive end to the negative end, or to make a current. While the outside of the insulated wire is the insulator, the inside of the wire has copper, which is the conductor of the current. So, this current will go through the copper of the wire (and not the insulator) from the positive side to the negative.

Answer:

Battery is the source of electrical energy which will help the charge to flow through a medium.

Battery is a constant source of potential difference which will create constant potential difference across the ends of a conductor where it is connected.

When a charge is passed through the constant potential difference then the change in electrostatic potential energy will give kinetic energy to the charge.

It is given as

$q\Delta V = (1)/(2)mv^2$

so here charge will continuously flow through the conductor across which potential difference is applied by the battery. This constant motion or flow of charge is known as electric current.

What does the term equilibrium refer to?

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It depends on what subject but usually it means the balance. In physics, it would be when (for example) the forces acting on an object are equal and the object is therefore in equilibrium. In Biology it would be the balance of the conditions of the body, water levels for example.

Answer:the resting position of the wave

Explanation:

Class characteristics serve as corroboration for other, more subjective pieces of evidence in a courtroom (like witness testimony). True False

Answers

Answer: True

Explanation:

Class characteristics can be define as the features which are common to the group of objects. Like the make, model, label of the manufacturing company, design, shape and form. The individual characteristics can be define as the features which develop on the object or any other article with it's wear and use. Like tear, cuts, malformation and deposition of dust, dirt, and mud. The individual characteristic indicate towards the ownership of article or evidence to a particular person.

The class characteristics can only support the possibility of the evidence exactly alike that of the evidence found at the scene of crime. But the individual characteristics can directly link the evidence with the cause of crime. Hence, will be useful to prove that a crime has taken place in the court of law.

Answer:

It is TRUEEEE

Explanation:

I just took the test and got it right

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