Physics High School

## Answers

**Answer 1**

**Answer:**

**8.136×10⁻⁵ J**

**Explanation:**

Applying,

Q = Cv................ Equation 1

Where Q = Charge on the capacitor, v = voltage of the battery, C = capacitance of the capacitor.

From the question,

Given: C = 6.78μF = 6.78×10⁻⁶ F, v = 12 V

Substitute these values into equation 1

Q = (6.78×10⁻⁶ )(12)

Q = 8.136×10⁻⁵ J

Hence the charge on the capacitor is 8.136×10⁻⁵ J

## Related Questions

walk done in units time is called

### Answers

**Answer:**

**Explanation:**

work done per unit time is caleed power.it's SI unit is watt.it depends upon time.

on a proton is 1.6×10`¹⁹. how many protons are in one coulomb of charge

### Answers

**Answer: There are **[tex]6.25 \times 10^{18}[/tex]** protons present in one coulomb of charge.**

**Explanation:**

**Given:** Charge on proton = [tex]1.6 \times 10^{-19} C[/tex]

It is known that the charge on a proton is equal to the charge present on an electron.

**Formula used to calculate number of protons is as follows.**

Q = ne

where,

Q = charge considered

n = number of protons

e = charge on electron or proton

**Substitute the values into above formula as follows.**

[tex]Q = ne\\1 C = n \times 1.6 \times 10^{-19} C\\n = 0.625 \times 10^{19}\\= 6.25 \times 10^{18}[/tex]

Thus, we can conclude that **there are **[tex]6.25 \times 10^{18}[/tex]** protons present in one coulomb of charge.**

Joe places two solid objects in contact with each other.

Which property determines the direction of the flow of heat between the two objects?

Select all the true

A

density of the objects

B

temperature of the objects

C

material of the objects

D

volume of the objects

### Answers

**Answer:**

B. temperature of the objects

A truck starts from rest with an acceleration of 0.3 m/ S^2 find its speed in km/h when it has moves through 150 m

### Answers

**Answer:**

9.5 m/s

**Explanation:**

Distance, S = 150m

Acceleration, a = 0.3 m/s^2

Initial velocity, u = 0 m/s

Final velocity, v

Use kinematics equation

v^2 - u^2 = 2aS

v^2 - 0 = 2*0.3*150 = 90

v = sqrt(90) = 9.49 m/s

During a Buckeye football game, the quarterback throws a ‘long bomb' to a wide receiver. During it's flight, the ball reached a maximum height of 15 m [U] before it started falling back down, and during this time flew 30m [E], where it was caught. The receiver then ran it another 15 m [E] for a touchdown. A) Determine the distance and displacement experienced in the up-down dimension by the ball b) Determine the distance and displacement experienced by the ball in the east-west dimension.

### Answers

**Answer:**

A) The distance traveled by the ball in the Up-down dimension is 30 m

The displacement of the ball in the up-down direction is 0 m

B) The distance the ball travels in the east west direction is 45 m [East]

The displacement of the ball is the east-west direction is 45 m [East]

**Explanation:**

The long measures of the ball motion are;

The maximum height reached = 15 m Up

The horizontal distance traveled by the ball during flight = 30 m East

The distance the receiver ran with the ball after the ball was caught = 15 m East

A) The distance traveled by the ball in the Up-down dimension = 15 m up + 15 m backdown = 30 m in the up-down direction

The displacement of the ball in the up-down direction, d = 15 m + (-15 m) = 0 m

B) The distance the ball travels in the east west direction = 30 m [E] + 15 m [E] = 45 [E]

The displacement of the ball is the east-west direction, d = 30 m + 15 m = 45 m [E].

Please urgent science question explaining needed

### Answers

**Answer:**

what is the question? there isn't one

I think you forgot the question

what do you mean by orbit?

### Answers

**Answer:**

An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. ...Planets, comets, asteroids and other objects in the solar system orbit the sun

**Explanation:**

In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet. Normally, orbit refers to a regularly repeating trajectory, although it may also refer to a non-repeating trajectory.

How much energy is transferred in 10 seconds with a current of 13 amperes and a potential difference of 230 volts?

### Answers

29900 J

**Explanation:**

Recall that

P = VI

= (230 volts)(13 A)

= 2990 watts

Also,

E = Pt

= (2990 watts)(10 s)

= 29900 J

Why x rays have different properties from light even though both originate from orbital transition of electrons in excited atoms?

### Answers

**Answer:**

he difference between X-rays and visible radiation is in the energy of each foton.

**Explanation:**

Visible light and X-rays are electromagnetism waves with the same origin betray the atomic, but the energy of transioin wings is different,

E = h (v_f - v₀)

With this equation we see that the energy is proportional to the difference between the atomic levels where the ranscion occurs, the X-rays the transition involves deep levels n = 1 or 2 for which the energy of the emitted photon is very high.

The visible radiation the transition is between levels closer so that the emitted light has a lower frequency and is in the range of the visibly

Consequently, the difference between X-rays and visible radiation is in the energy of each foton.

Which statement best describes the Sun Earth-Moon system?

### Answers

**Answer:**

A

**Explanation:**

A. The Moon orbits the Earth, and the Earth-Moon system orbits the Sun

B. The Earth and Moon both orbit the Sun separately

C. The Sun orbits the Earth-Moon system

D. The Moon revolves around Earth but not the Sun

why should we measure accurately

### Answers

**Answer:**

To obtain fair results

**Explanation:**

if we don't measure the results might give unfair results

**Answer:**

Accurate measurement s r important bcz precise amounts r required for reaçtiøñ#s tø take place før a recipe tø turn out ãnd tø keep correct records of A measurement

*uR** **ANSWER** HOPE** IT** HELPS** YOU**.**.**.*

On what factors does critical velocity depend on

### Answers

**Explanation:**

The critical velocity is that velocity of liquid flow, up to which its flow is streamlined (laminar)& above which its flow becomes turbulent. It's denoted by Vc & it depends upon: Coefficient of viscosity of liquid (η) Density of liquid. Radius of the tube.

Numa máquina térmica uma parte da energia térmica fornecida ao sistema(Q1) é transformada em trabalho mecânico (τ) e o restante (Q2) é dissipado, perdido para o ambiente.

sendo:

τ: trabalho realizado (J) [Joule]

Q1: energia fornecida (J)

Q2: energia dissipada (J)

temos: τ = Q1 - Q2

O rendimento (η) é a razão do trabalho realizado pela energia fornecida:

η= τ/Q1

Exercícior resolvido:

Uma máquina térmica cíclica recebe 5000 J de calor de uma fonte quente e realiza trabalho de 3500 J. Calcule o rendimento dessa máquina térmica.

solução:

τ=3500 J

Q1=5000J

η= τ/Q1

η= 3500/5000

η= 0,7 ou seja 70%

Energia dissipada será:

τ = Q1 - Q2

Q2 = Q1- τ

Q2=5000-3500

Q2= 1500 J

Exercicio: Qual seria o rendimento se a máquina do exercicio anterior realizasse 4000J de trabalho com a mesma quantidade de calor fornecida ? Quanta energia seria dissipada agora?

obs: Entregar foto da resolução ou o cálculo passo a passo na mensagem

### Answers

Numa máquina térmica uma parte da energia térmica fornecida ao sistema(Q1) é transformada em trabalho mecânico (τ) e o restante (Q2) é dissipado, perdido para o ambiente.

sendo:

τ: trabalho realizado (J) [Joule]

Q1: energia fornecida (J)

Q2: energia dissipada (J)

temos: τ = Q1 - Q2

O rendimento (η) é a razão do trabalho realizado pela energia fornecida:

η= τ/Q1

Exercícior resolvido:

Uma máquina térmica cíclica recebe 5000 J de calor de uma fonte quente e realiza trabalho de 3500 J. Calcule o rendimento dessa máquina térmica.

solução:

τ=3500 J

Q1=5000J

η= τ/Q1

η= 3500/5000

η= 0,7 ou seja 70%

Energia dissipada será:

τ = Q1 - Q2

Q2 = Q1- τ

Q2=5000-3500

Q2= 1500 J

Exercicio: Qual seria o rendimento se a máquina do exercicio anterior realizasse 4000J de trabalho com a mesma quantidade de calor fornecida ? Quanta energia seria dissipada agora?

obs: Entregar foto da resolução ou o cálculo passo a passo na mensagem

Describe the movements that occur along each of the three types of faults. Describe the movements that occur along each of the three types of faults.

### Answers

**Answer:**

**Explanation:**

strike-slip, normal and thrust

mark her as brainiest, :) I don't need it :P

if molecule gains heat energy it converts liquid to gas

### Answers

**Answer:**

Actually, the substance is the one that changes from liquid to gas.

The molecule just gains energy which overcomes the attraction force between it and neighboring molecule.

FInish the lyircs! I am healthy I am wealthy

### Answers

**Answer:**

I am rich, I am that bi*ch. I am gonna go get that bag and I am not gonna take your ****

**Explanation:**

A solid cylinder has a mass of 5 kg and radius of 2 m and is fixed so that it is able to rotate freely around its center without friction. A 0.02 kg bullet is moving from right to left with an angular momentum of 9 kgm2s just before it strikes the cylinder near its bottom and gets stuck at the outer radius. What is the angular velocity (magnitude and direction) of the cylinder bullet system after the impact

### Answers

**Answer:**

0.893 rad/s in the clockwise direction

**Explanation:**

From the law of conservation of angular momentum,

angular momentum before impact = angular momentum after impact

L₁ = L₂

L₁ = angular momentum of bullet = + 9 kgm²/s (it is positive since the bullet tends to rotate in a clockwise direction from left to right)

L₂ = angular momentum of cylinder and angular momentum of bullet after collision.

L₂ = (I₁ + I₂)ω where I₁ = rotational inertia of cylinder = 1/2MR² where M = mass of cylinder = 5 kg and R = radius of cylinder = 2 m, I₂ = rotational inertia of bullet about axis of cylinder after collision = mR² where m = mass of bullet = 0.02 kg and R = radius of cylinder = 2m and ω = angular velocity of system after collision

So,

L₁ = L₂

L₁ = (I₁ + I₂)ω

ω = L₁/(I₁ + I₂)

ω = L₁/(1/2MR² + mR²)

ω = L₁/(1/2M + m)R²

substituting the values of the variables into the equation, we have

ω = L₁/(1/2M + m)R²

ω = + 9 kgm²/s/(1/2 × 5 kg + 0.02 kg)(2 m)²

ω = + 9 kgm²/s/(2.5 kg + 0.02 kg)(4 m²)

ω = + 9 kgm²/s/(2.52 kg)(4 m²)

ω = +9 kgm²/s/10.08 kgm²

ω = + 0.893 rad/s

The angular velocity of the cylinder bullet system is 0.893 rad/s in the clockwise direction-since it is positive.

em 6

Which provides a definition for

matter?

Anything that

A.

B.

C.

D.

is solid and has weight

takes up space and is heavy

takes up space and has mass

is a liquid or solid

### Answers

**Answer:**

definition of matter is that matter takes up space and has mass

What is the strength of an electric field 0.2 m from a 1.56 x 10-6 C charge?

### Answers

**Answer:**

Solution given:

strength of electric field [E]:?

distance[d]:0.2m

charge[Q]=[tex]1.56×10^{-6} C[/tex]

we have

**E**** **=K [tex] \frac{Q}{r²}[/tex]

E=[tex]9×10^{9} C[/tex][tex] \frac{1.56×10^-6 C}{0.2²} [/tex]

E=[tex] 3.51×10^{5}[/tex]V/m

**strength of electric ****field**** ****:** [tex] 3.51×10^{5}[/tex]V/m

30. A box with mass 20kg is on a cement floor. The coefficient of static friction between the box and floor is 0.25. A man is pushing the box with a horizontal force of 35N. What is the magnitude of the force of static friction between the box and floor

### Answers

**Answer:**

84.05

**Explanation:**

F=mg×0.25F=20x9.81×0.25f=49.05NF=35N

F=f+F

F=49.05+35

=84.05

_____ Rocks are porous.

A) Sedimentary

B) Metamorphic

C) igneous

### Answers

**Answer:**

Sedimentary rocks are porous.

**Explanation:**

So option A) Sedimentary is your answer. Have a great summer

Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 1.1 m, while the mass of each is 0.10 kg. One rod is held in place above the ground, and the other floats beneath it at a distance of 11 mm. Determine the current in the rods.

### Answers

**Answer:**

220 A

**Explanation:**

The magnetic force on the floating rod due to the rod held close to the ground is F = BI₁L where B = magnetic field due to rod held close the ground = μ₀I₂/2πd where μ₀ = permeability of free space = 4π × 10⁻⁷ H/m, I₂ = current in rod close to ground and d = distance between both rods = 11 mm = 0.011 m. Also, I₁ = current in floating rod and L = length of rod = 1.1 m.

So, F = BI₁L

F = (μ₀I₂/2πd)I₁L

F = μ₀I₁I₂L/2πd

Given that the current in the rods are the same, I₁ = I₂ = I

So,

F = μ₀I²L/2πd

Now, the magnetic force on the floating rod equals its weight , W = mg where m = mass of rod = 0.10kg and g = acceleration due to gravity = 9.8 m/s²

So, F = W

μ₀I²L/2πd = mg

making I subject of the formula, we have

I² = 2πdmg/μ₀L

I = √(2πdmg/μ₀L)

substituting the values of the variables into the equation, we have

I = √(2π × 0.011 m × 0.1 kg × 9.8 m/s²/[4π × 10⁻⁷ H/m × 1.1 m])

I = √(0.01078 kgm²/s²/[2 × 10⁻⁷ H/m × 1.1 m])

I = √(0.01078 kgm²/s²/[2.2 × 10⁻⁷ H])

I = √(0.0049 × 10⁷kgm²/s²H)

I = √(0.049 × 10⁶kgm²/s²H)

I = 0.22 × 10³ A

I = 220 A

Emma compares the time it takes for a large marble and a small marble to roll down a slope. To make the findings reliable, Emma should..

### Answers

Answer:

use two marbles that are having the same mass.

Explanation:

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

Compare and contrast is used for the comparison of two or more things to show similarities and differences i.e how they are alike and different.

In this scenario, Emma compares the time it takes for a large marble and a small marble to roll down a slope.

In order to make his findings reliable, Emma should use two marbles that are having the same mass i.e two large marbles with the same mass and two small marbles with the same mass.

Mass can be defined as a measure of the amount of matter an object or a body comprises of. The standard unit of measurement of the mass of an object or a body is kilograms. Irrespective of the location of an object or a body at a given moment in time, the mass (amount of matter that they're made up of) is constant.

The force between two charges is 1000 N. One has a charge of 2.0 x 10-5 C and one has a charge of 5.0 x 10-6 C. What is the distance between the charges?

### Answers

**Answer:**

F= kq1q2÷r^2 r=√9x10^9 x 2.0 x 10^-5 x 5.0x 10^-6 ÷ 1000 ) the ansewer√300

Light travels through space at a speed of 3.0 x 108 m/s. A space probe is

traveling toward Earth at 2.5 * 108 m/s when one of its spotlights is turned

on. What speed would an observer on Earth measure for the light from the

spotlight?

O A. 2.5 * 108 m/s

O B. 3.0 x 108 m/s

O c. 5.5 x 108 m/s

O D. 0.5 x 108 m/s

### Answers

**Explanation:**

The answer is (B). The speed of light is the same for all observers regardless of their motion relative to the light source.

The **speed **would an observer on **Earth **measures for the **light **from the **spotlight **will be** 3×10⁸ m/sec.**

What is speed?

**Speed **is defined as the **rate **of change of the **distance **or the **height attained**. it is a time-based quantity. it is denoted by u for the i**nitial speed **while v for the **final speed**. its si unit is** m/sec.**

The **given **data in the problem is;

The **speed **of light is, [tex]\rm C =3 \times 10^8\ m/sec[/tex]

All frames of reference have the** same speed **of light in a **vacuum**. Therefore the **speed **would an observer on **Earth **measures for the **light **from the **spotlight **will be 3×10⁸ **m/sec.**

Hence** option B** is correct.

To learn more about the **speed **refer to the link;

https://brainly.com/question/7359669

29. A boy lifts a book with the weight of 30.0 N from the floor to the top of a table, a vertical distance of 2.0. meters. Compute the increase in the potential energy of the weight.

Remember to include your data, equation, and work when solving this problem.

### Answers

**Answer:**

60J

**Explanation:**

Since the book's weight is 30N and weight = mass * gravity (around 10m/s²):

30 = X * 10 ===> X = 3.

Using the potential energy formula we have Gravity * Height * Mass:

10 * 2 * 3 = 60J

An object is to the left of a convex mirror. Describe the two rays needed to indicate the location and height of the image. Additionally, state what side of the mirror the image is on and whether it is real or virtual.

### Answers

**Answer:**

1) a ray parallel to the optical axis that after passing through the lens passes through the focal length

2) a ray that passes through the center of curvature, this ray does not have any deviation

real image d_{objet} > f

**Explanation:**

In geometric optics, you can find the position of the image by geometric method, we draw two rays

1) a ray parallel to the optical axis that after passing through the lens passes through the focal length

2) a ray that passes through the center of curvature, this ray does not have any deviation

3) a ray that passes through the focal length and when passing the lens comes out horizontally

The interceptor point is where the image is

To determine if the image is real or virtual, when the object is at a greater distance than the focal length, the image is real and when it is at a shorter distance, the image is virtual.

The virtual image is formed on the same side as the object

real image d_{objet} > f

A magnetic compass is placed near an insulated copper wire. When the wire is connected to a battery and a current is created, the compass needle moves and changes its position. Which is the best explanation for the production of a force that causes the needle to move?

### Answers

**Explanation:**

When the wire is connected to a battery, the compass needle moves and changes its position. This happens because the needle magnetizes the copper wire, thus, creating a force.

While the current in the wire produces a magnetic field and exerts a force on the needle. The insulation on the wire becomes energized and exerts a force on the needle. Hence, the compass needle moves and changes its position.

A stunt performer falls off a wall that is 1.6 m high and then lands on a mat.

What is his impact velocity?

A. 5.6 m/s

B. 1.1 m/s

C. 4.7 m/s

o

D. 2.9 m/s

### Answers

**Option**** ****B****:**** ****5****.****6**** ****m****/****s**

According to law of conservation of energy,

= ½mv² = mgh

= mv² = 2mgh

= v² = 2mgh/m

= v = √2gh

So, now just put the values of g & h, abd you are done;

= v = √2×9.8×1.6

= v = √31.36

= v = 5.6 m/s

How many types of galaxies are there?

a. 3

b. 4

c. 5

d. 6

### Answers

The answer is 3 elliptical, spiral, and irregular.