PHYSICS HIGH SCHOOL

While solving a problem, Tran calculates an answer that has coulomb-volts as the units. Which quantity did Tran calculate?


A. electric potential energy

B. electric potential difference

C. electric field

D. electric potential

Answers

Answer 1
Answer:

While solving a problem, Tran calculates an answer that has coulomb-volts as the units and the quantity that it calculates is the electrical potential energy. Hence, option A is correct.

What is Electrical energy?

Charged material experiences a force when exposed to an electromagnetic field because of the fundamental characteristic of electric charge. It's conceivable for electrical ions to be positive or negative. Two charges that are opposed to one another repel one another.

An object with no net charge is said to be "neutral." Classical electrodynamics refers to the older theory of how charged particles interact, and it is still valid for problems that do not necessitate accounting for quantum phenomena.

The net charge of an isolated system, which is the total of the negative and positive charges, cannot change since the electrical current is a conserved property. Electric charge is carried by subatomic particles.

Electromotive force energy is a type of potential energy that emerges from the conservative Coulomb interactions and is linked to the arrangement of a specific set of charged objects within a given system.

To know more about electrical energy:

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Answer 2
Answer:

Answer:

a. electric potential energy

Explanation:

i just looked at my test score on edge


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COLLEGE

A speedboat is moving at a constant speed, and the force propelling it forward is balanced by the force of the water pulling it backward. But suddenly a wave strikes it from the side with a force of 500 newtons. When the wave hits the boat, A. the forces acting on the speedboat will stay balanced. B. a net force of 4,000 N will act on the speedboat. C. the speedboat's direction of motion will change. D. a net force of 8,000 N will act on the speedboat.

Answers

The correct answer is C: the speedboat's direction of motion will change. This is In fact, the new force of 500 N from the side of the boat is not balanced by any forces from the other side, and therefore this force will cause an acceleration in the direction of the force itself, which is not the same direction of motion. Therefore, the speedboat will acquire a movement on the lateral direction as well.

the speedboat direction of motion will change

MIDDLE SCHOOL

Which of these best shows a change from potential to kinetic energy

Answers

The example that best shows a change from potential to kinetic energy is: water flowing over a tall cliff.

WHAT IS KINETIC ENERGY?

Kinetic energy is the energy due to the motion of an object while potential energy is the energy due to the position of an object.

Potential energy, which is the energy assumed by an object at rest, can be converted to kinetic energy.

The example that best shows a change from potential to kinetic energy is: water flowing over a tall cliff. This is because the water is at rest at the top of the cliff but gains kinetic energy when moving over.

Learn more about energy at: brainly.com/question/999862

A

Water flowing over a tall cliff best shows a change from potential to kinetic energy

Explanation:

At the top of the cliff, the water has potential energy – intrinsic energy of the water due to its  relative position of high elevation. The water has the ability to do work. As the water starts falling down the cliff by gravity, this potential energy is converted to kinetic energy – intrinsic energy due to its motion. The kinetic energy can be harnessed to turn dynamo turbines that convert the kinetic energy to electric energy – this is how hydroelectric power is produced.

Learn More:

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MIDDLE SCHOOL

A 20.0kg cart travels at 10.0 m/s in a circle with a radius of 15.0 m. What is the centripetal force? 3.00 N
30.0 N
13.3 N
133 N

Answers

Net centripetal force is given by the product of mass and centripetal acceleration

Here we know that

mass (m) = 20 kg

speed (v) = 10 m/s

radius (R) = 15 m

So here we can say that centripetal acceleration is given as

now from the formula of force

so correct answer would be 133 N

COLLEGE

A particle moves along a straight path through a displacement d = 2.5i + cj while a force F = 8.5i + -8.5j acts on it. The displacement is measured in meters and the force is measured in Newtons. (Other forces also act on the particle.) What is the value of c if the work done by F on the particle is zero?

Answers

Answer:

Explanation:

Work is defined as the scalar product of force and distance

W=F•d

Given that

F = 8.5i + -8.5j. +×-=-

F=8.5i-8.5j

d = 2.5i + cj

If the work in the practice is zero, then W=0

therefore,

W=F•ds

0=F•ds

0=(8.5i -8.5j)•(2.5i + cj)

Note that

i.i=j.j=k.k=1

i.j=j.i=k.i=i.k=j.k=k.j=0

So applying this

0=(8.5i -8.5j)•(2.5i + cj)

0= (8.5×2.5i.i + 8.5×ci.j -8.5×2.5j.i-8.5×cj.j)

0=21.25-8.5c

Therefore,

8.5c=21.25

c=21.25/8.5

c=2.5

HIGH SCHOOL

If the diameter of each of a car's wheels is 0.4 meters, approximately, what was the average speed of the car for its three-hour trip in which each wheel made 100,000 revolutions?

Answers

Answer:

42 km/h was the average speed of the car for its three-hour trip.

Explanation:

Diameter of the car wheel = d = 0.4 m

Radius of the car wheel = r = 0.5 d = 0.5 × 0.4 m =0.2 m

Distance covered in 1 complete revolution =

Distance covered in 100,000 complete revolution,D =

1 m = 0.001 km

125,663.71 m = 125,663.71 × 0.001 km = 125.66371 km

Time taken to complete 100,000 revolution by a wheel = t = 3 hours

Speed of car : S

42 km/h was the average speed of the car for its three-hour trip.

Answer:

Explanation:

diameter = 0.4 m

Radius, r = 0.2 m

Time, t = 3 hour

number of revolutions, = 100,000

Distance traveled in one revolution = 2 x π x r = 2 x 3.14 x 0.2 = 1.256 m

Total distance in 100,000 revolutions,

d = 100,000 x 1.256 = 125600 m

d = 125.6 km

Average speed = distance / time

Average speed = 125.6 / 3 = 41.87 km/h

HIGH SCHOOL

 HURRY PZZ 30PTS Which of the following characteristics differentiates an autotroph from a heterotroph? Question 1 options: An autotroph can only obtain its energy from a heterotroph. An autotroph must obtain its energy from a heterotroph or other autotroph.. Heterotrophs only obtain their energy from the Sun. A heterotroph must obtain its energy from an autotroph or other heterotroph. Autotrophs only obtain their energy from the Sun. A heterotroph can only obtain its energy from an autotroph.





If someone told you they had a career in either ecology, paleontology, or botany, what area of science is this?
Question 2 options:


astronomy


biology


physics


chemistry

Which of the following statements is true for all living things (organisms)?
Question 3 options:


None of The Above


All living things are made up of one or more cells.


All living things have organs.


All living things produce their own food.

How are these related: human, mold, bacteria?
Question 4 options:


They are all protists.


They are all organisms.


They are all Domain Bacteria.


They are all Kingdom Animalia.

What would happen if several salmon in an area were only able to lay 100 eggs instead of what they normally lay?
Question 5 options:


Nothing. The population will most likely stay the same.


The population will most likely die out since most of the eggs are usually eaten and destroyed.


The population will most likely decrease some but the salmon will still survive in the area.


The population will most likely increase dramatically since fewer eggs means better eggs

An organism that has been thriving, has died. Which of the following is NOT a cause of its demise?
Question 6 options:


appropriate enviornment


soil


food


water

The leaves on a green plant soak up sunlight to make food. A cow's stomach digests grass that was eaten. How are these alike?
Question 7 options:


They are both show how organisms continue growth.


They both show how organisms use metabolism.


They are both examples of heredity in organisms.


They are both ways organisms maintain homeostasis.


While exercising, the body releases sweat. Which of the below is a reason this occurs?
Question 8 options:


None of the Above


Homeostasis


Metabolism


Survival of the fittest

Based on the classification system, which subgroup would you find at the bottom?
Question 9 options:


Class


Phylum


Domain


Species

You are taking a walk in the woods. You come upon a butterfly with coloring and other features you have not seen before. You want to find out its scientific name so you can tell your friends and family about it, and they can look it up. It would be best to use what to determine this?
Question 10 options:


Classification system


dichotomus key


Google


science book

Who developed a system of classifying organisms by genus and species?
Question 11 options:


Watson


Mendel


Linnaeus


Darwin

Answers

Answer:

Q1: A heterotroph can obtain its energy by consuming another autotroph or a heterotroph.

Q2: Biology.

Q3: All living things are made up of one or more cells.

Q4: They are all organisms.

Q5: The population will most likely die out since most of the eggs are usually eaten and destroyed.

Q6: Appropriate environment.

Q7: They are both ways organisms maintain homeostasis.

Q8: Homeostasis.

Q9: Species

Q10: Dichotomous key.

Q11: Carolus Linnaeus

Autrotrophs obtain their energy from the sun


Biology


All living things have. Organs



COLLEGE

A parallel-plate, air-gap capacitor has a capacitance of 0.14 mu F. The plates are 0.5 mm apart, What is the area of each plate? What is the potential difference between the plates if the capacitor is charged to 1.2 mu C? What is the stored energy? How much charge can the capacitor carry before a spark occurs between the two plates (thus discharging the capacitor)?

Answers

Answer:

7.9060 m²

8.57 Volts

5.142×10⁻⁶ Joule

1.2×10⁻⁶ Coulomb

Explanation:

C = Capacitance between plates = 0.14 μF = 0.14×10⁻⁶ F

d = Distance between plates = 0.5 mm = 0.5×10⁻³ m

Q = Charge = 1.2 μC = 1.2×10⁻⁶ C

ε₀ = Permittivity = 8.854×10⁻¹² F/m

Capacitance

∴ Area of each plate is 7.9060 m²

Voltage

∴ Potential difference between the plates if the capacitor is charged to 1.2 μC  is 8.57 Volts.

Energy stored

E=0.5CV²

⇒E = 0.5×0.14×10⁻⁶×8.57²

⇒E = 5.142×10⁻⁶ Joule

∴ Stored energy is 5.142×10⁻⁶ Joule

Charge

Q = CV

⇒Q = 0.14×10⁻⁶×8.57

⇒Q = 1.2×10⁻⁶ C

∴ Charge the capacitor carries before a spark occurs between the two plates is 1.2×10⁻⁶ Coulomb

COLLEGE

Unpolarized light of intensity 800 W/m2 is incident on two ideal polarizing sheets that are placed with their transmission axes perpendicular to each other. An additional polarizing sheet is then placed between the two, with its transmission axis oriented at 30∘ to that of the first. What is the intensity of the light passing through the stack of polarizing sheets? (Express your answer to two significant figures.)

Answers

Answer:

75 W/m²

Explanation:

= Unpolarized light intensity = 800 W/m²

= Angle between filters = 30°

Intensity of light after passing through first polarizer

Intensity of light after passing through second polarizer

Intensity of light after passing through third polarizer

The intensity of the light passing through the stack of polarizing sheets is 75 W/m²

MIDDLE SCHOOL

Select the correct answer. Why is the primary mirror in a telescope curved?
A.
to magnify the image
B.
to direct light rays to a focal point to intensify them
C.
to change the direction of the rays
D.
to bend the rays
E.
to absorb extra light

Answers

Answer:

to absorb extra light- E.

Answer:

E.

Explanation:

Curved mirrors absorb more light that the flat ones, this means that the image you're gonna get it has more information, you can see more.

That's why curved mirror are also used to vigilance in stores for example. Because allows you to see a more panoramic view due to the extra light reflection.

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