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balu736 [363]
3 years ago
8

Question 7(Multiple Choice Worth 1 points) (05.02 MC) Hugh wrote the characteristics of two types of galaxies as shown below: Ty

pe A: Has a central core from which curved arms come out Type B: Forms a perfect sphere or a smooth flattened oval Which statement is correct? Type A is a lens galaxy and Type B is an irregular galaxy. Type A is an irregular galaxy and Type B is a lens galaxy. Type A is an elliptical galaxy and Type B is a spiral galaxy. Type A is a spiral galaxy and Type B is an elliptical galaxy.
Biology
1 answer:
solong [7]3 years ago
3 0

Answer:

its the last option i think

Explanation:

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Question 1 (3 points)
SVETLANKA909090 [29]

Answer:

1. Electrons

2. thru the circuit from the negative power terminal to the positive power terminal

3. Current

4. Voltage

5. resistance

6. Amps

7. Volts

8. Ohms

9. The voltage is decreased by the electrical resistance.

10. It doesn't work. The electricity can't go backwards thru an LED.

11. The current will decrease.

12. 0.75 amps

13. The current increase

14. an inverse relationship

Explanation:

1. Electrons are what move through a circuit. These electrons are called mobile electrons. Unlike protons and neutrons, they are not confined in the nucleus and are free to move about.

2. Electrons tend to move towards the positive. When an electron moves to a stable atom,the atom would have too much electrons, making it negatively charged. This then would cause a chain reaction of passing on electrons to keep stable.

10.

3 to 8:

Collectively, the flow of electric current is dependent on four things: Voltage, current, resistance, and power.

Voltage is the like the driving force of current. It is the measure of the potential energy or electric potential difference between two points. The unit of voltage is volts, named after Alessandro Volta. You can think of volts as electrical pressure. The higher the voltage, the higher the pressure on the flow of charge.

Current is the "flow" of electrons. It could have another meaning though, in electronics, we refer to current as the volume of the flow of electrons. Current is measured in AMPERES or amps named after Andre M. Ampere. Current is a measure of rate, or the rate of the amount of electrons that flow through a certain point in a circuit, at a given time.

Resistance on the other hand is the opposing force. As electrons move along a circuit, there is bound to be friction. This friction opposes the movement of the electrons, which we call resistance. Resistance uses the unit ohms or the symbol Ω.

These three are all related. The flow of current is affected by how much voltage there is available or pressure available for the movement of the electrons, and at the same time, it is also affected to how much resistance there is in the circuit. And that is where Ohm's Law comes in.

9 and 11-14:

Ohm's Law describes the relationship between current, voltage and resistance. It can be summarized into this formula:

V = IR \rightarrow\; I=\dfrac{V}{R}\rightarrow\;R=\dfrac{V}{I}

Where:

V = voltage

I = Current

R = Resistance

9. When electricity is met with an electrical component, the resistance through that part of the circuit increases. However, the resistance does not change the potential difference between the two points, but rather, it changes the amount of current that flows through. This means that it does not affect the voltage.

11. But on the other hand, for this scenario, the resistance was increased from 10 Ohms to 15 Ohms. Current and resistance have an indirect relationship. This means that as one goes up, the other goes down. As the resistance increases, the less current is able to flow through and thus the current will decrease.

12. Using Ohm's Law we can solve this:

I = \dfrac{V}{R}

The following is our given:

V = 9 V

R = 12 Ω

We plug that in our formula:

I = \dfrac{V}{R}\\\\I = \dfrac{9}{12} = \dfrac{3}{4} = 0.75A

13. As mentioned earlier, current and resistance have an indirect relationship. So when you have this scenario where the resistance  chages from 20 Ω to 12Ω, you see that there is a decrease in resistance. This means that more current can flow through this circuit. So this means that the current increases.

14. was already explained above.

Hope this helps even just a little bit! Good Luck!

4 0
3 years ago
Control-part of the body that determines what to do with the information about the change in setpoint (I will give brainliest)
Ann [662]

Answer:

Hypothalamus

Explanation:

The hypothalamus is involved in different daily activities like eating or drinking, in the control of the body's temperature and energy maintenance, and in the process of memorizing and in stress control. It also modulates the endocrine system through its connections with the pituitary gland.

4 0
2 years ago
14. The average brain weighs about
andrew11 [14]

Answer:

A. three pounds

Explanation:

it definitely doesn't weigh ounces :)

8 0
3 years ago
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IRINA_888 [86]
C. Wolves hunting for food.......
6 0
3 years ago
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Evidence for evolution includes the presence of _______________________, which are similar structures shared by different specie
Ann [662]
The answer is <span>d. homologous structures.

Homologous structures are </span><span>similar structures shared by different species. For example, the anatomy of joints in bones of birds and dinosaurs, support the idea that these two groups have a common ancestor. But since these two groups are different enough to be separated into different classes, it can be concluded that they evolved from the common ancestor.</span>
4 0
3 years ago
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