Question 2 (1 point)
This graph shows an object in free fall. Assume there is no air resistance. What is the only force acting on this object?

Explanation:

q1 = -6

q2 = -8

d^2 = (6/100)^2 = 0.0036

k = 1/4*(pi*E) where E js the permittivity of free space

F = (k*q1*q2)/(d^2)

Substitute your values into this equation and solve

(a) The work done by the gas during this process is -10.8 J.

(b)  The heat added to the gas during this process is 10.8 J.

The work done by the gas during the isothermal expansion is calculated as follows;

W(net) = ΔP x ΔV

W(net) = (2 kPa - 5 kPa) x (6L - 2.4 L)

W(net) = (-3kPa) x 3.6L

W(net) = -10.8 kPa.L

W(net) = -10.8 J

W = - Q

-10.8 J = -Q

Q = 10.8 J

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Answer:

i honestly do not know the awnser , im just setting up my brainly account

Answer:

Q)32) What is the unit of intensity of sound

Ans)Decibel

Q)33) Relate amplitude and distance to the intensity and loudness of sound

Ans)The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of the sound increases. (i can't find the answer for distance and loudness i can't find it on g....o...o....g....l.....e and my textbook u will have to search it on ur own sorry)

Q)34) What is the pitch of sound

Pitch is the rise and fall of our voice when we speak. It is the characteristic of sound by which we can distinguish the sounds of the same loudness. Types: Pitch is generally of two types, high pitch and low pitch. High Pitch: The higher the frequency of the sound, the higher will be the pitch.

Q)35) How is pitch of sound related to its frequency of sound waves?

The sensation of a frequency is commonly referred to as the pitch of a sound. The pitch of the sound we hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound has a low pitch.

Q)36) Define the Doppler effect?

The apparent change in the frequency of sound due to the relative motion between the source and the observer is called the Doppler effect.

Q)37) Explain why the doppler effect occurs

The Doppler effect, or Doppler shift, occurs when the movement of an observer relative to a source (or vice versa) causes a change in wavelength or frequency.

Sorry i can't find the last one i will try to search it afterwards

The coulombs of charge which are flowing into the house is 400 coulombs.

This is the physical property of matter that causes it to experience a force when placed in an electromagnetic field and its unit is Coulomb.

Electric charge(Q) = It where I is current and t is time

Q = It

 = 200A × 2s

 = 400 coulombs

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The most significant difference between the three point and the four-point starter is that in three-point starter the no voltage coil (NVC) is connected in series with the field winding whereas in four-point starter the NVC is directly connected to the supply voltage.

☆...hope this helps...☆

_♥︎_mashi_♥︎_

Answer:

my answer to that question was c

Explanation:

Answer:

I believe it wouled be Nutrients

Explanation:

hope this helps if not please let me know

Answer:

can you clear more I don't understand

Answer:

Please see the file attached

For an erect object is 50 cm from a concave mirror of radius 60 cm. In the situation above, the object is moved to a new position, the new object distance is mathematically given as

u = -18cm

Generally, the equation for magnification is mathematically given as

1/f = 1/v +1/u

therefore,

-1/30 = 1/v + 1/u

v = -2.5u

Hence,

-1/30 = -1/2.5u + 1/u

-1/30 = (3/5)u

u = -18

In conclusion, the new object distance is

u = -18cm

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Answer:

4 ohms

Explanation:

V = I R

12 = 3 R

R = 4 ohms

Answer:

600-750

Explanation:

The red color in the visible region lies in the wavelength of 600 – 750 nm. The visible light spectrum is the fraction of the spectrum that is visible to humans.

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.

The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometers, and other units since it is a distance measurement.

The portion of the spectrum visible to the human light is known as the visible light Spectrum.

Visible light has a range of wavelengths from about 400-750 nm. The red color in the visible region lies in the wavelength of 600 – 750 nm.

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The hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).

The second law of thermodynamics states that, hot things always cool unless you do something to stop them. Or the total entropy of an isolated system can never decrease.

In other words, not all heat energy can be converted into work in a cyclic process.

Therefore, we can conclude that when the woman returns, the hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).

Learn more about second law of thermodynamics here: https://brainly.com/question/1022530

Answer:

850m

Explanation:

The answer should be 850m

I apologize if it is incorrect-

Have a great day!

Anygays-

Answer:

The angular speed will be 85.13 rad/sec

Explanation:

Answer:

75 km/hour

Explanation:

Total distance travelled= 200+25 = 225 km
Total time= 2+1 hours = 3 hours
Average speed= Total Distance/Total time = 225/3 = 75 km/hr

Answer:

Q = M kg* 3.33E5 J / kg = .234 * 3.33E5 = 7.79E4 Joules

As a check (using 80 cal/gm as latent heat of fusion for water)

234 g * 80 cal/gm = 18720 cal

1 cal = 4.19 J

18720 cal * 4.19 J / cal = 7.7E4 J       agrees with value found above

Answer:

gravity

Explanation:

ok what i understand from your query is that a spring balance with a metal piece attached to it is weighing it down, a spring balance is measured in newtons (f=ma), the acceleration part is gravity (-9.81 m/s^2). The metal piece is attached to the string.

hope this answers your question and please take my answer with a grain of salt and refer to some webpages or videos

Answer:

Your answer is C

Explanation:

V=IxR

220 divide by 1.2=183.0

The answer was probably a type error so it should be C

Answer:

velocity

Explanation:

when a speed is given with a direction it is velocity

Answer:

Velocity

Explanation:

Velocity is the rate, and direction of an objects movement.

Speed is the rate of and objects movement, no certain direction.

Acceleration is the rate when velocity changes over time, it can both increase and decrease, and it has both speed and direction.

I hope this helps! Have a great day!

Your Murderer~

The initial angular momentum of the propeller before the torque was applied will be 32 kg m²/s.

Torque is the force's twisting action about the axis of rotation. Torque is the term used to describe the instant of force. It is the rotational equivalent of force. Torque is a force that acts in a turn or twist.

The amount of torque is equal to force multiplied by the perpendicular distance between the point of application of force and the axis of rotation.

The given data in the problem is;

The rotational inertia is,I  = 2.0 kg m²

The clockwise torque is, T = 4.0Nm

The time period is,t= 4.0s,

The angular speed is,ω= 24 * (rad)/s

The initial angular momentum of the propeller is,I₀

The angular acceleration is found by the relation;

[tex]\rm \tau = I \times \alpha \\\\ \alpha =\frac{\tau}{i} \\\\ \alpha =\frac{4.0}{2.0} \\\\ \alpha= 2.0 \ rad/sec^2[/tex]

The initial angular velocity is found as;

[tex]\rm \omega_f = \omega_0 + \alpha t \\\\ \omega_0 = \omega_f -\alpha t \\\\ \omega_0 =24 -[(-2.0)\times 4.0)] \\\\ \omega_0 = 16 \ rad/sec[/tex]

The initial angular momentum of the propeller is found as;

[tex]\rm L_0 = I \omega_0 \\\\ L_0 = 20 \times (1.6) \\\\ I_0 = -32 \ kgm^2/s[/tex]

Hence,the initial angular momentum will be 32 kg m²/s.

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Answer: 14 kg•m2/s

Explanation:

Trust me it’s from khan

Answer:

It add strength to the metal, along with other enhanced chemical properties. Hardness, machinability, and corrosion resistance are other properties that can be added or enhanced by creating an alloy.

I hope my answer helps you.

increase or decrease

Thus the mass may increase and  decrease due to conduction || varies

λ = 5 x 10^-7 m, i.e the wavelength

the energy in the wave.

= c / λ

c =( 3 x 10^ 8 m/s)

f = 3x10^8ms-¹ /5 x10^-7m

= 6x10^14 Hz.

Answer:

150 j

Explanation:

K.E. = 1/2 m v ^2

      = 1/2 * 3 * 10^2  = 150 j

The angular velcoity of this cylinder when the downward speed of the elevator is 1.2 m/s would be 6 rad/s.

Given the following data:

Radius of cylinder = 0.20 meter.

Linear velocity = 1.2 m/s.

Angular velocity can be defined as the rate of change of angular displacement of an object with respect to time. Thus, it is a measure of how fast and quickly an object revolves or rotates relative to another point or how its angular position changes with respect to time.

Mathematically, angular velcoity is given by this formula:

[tex]V =r\omega\\\\\omega =\frac{V}{r}[/tex]

Substituting the given parameters into the formula, we have;

[tex]\omega = \frac{1.2}{0.2}[/tex]

Angular velocity = 6 rad/s.

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Answer:

To change degrees Celsius in degrees Fahrenheit, the formula is:

F = 1.8C +32F=1.8C+3

Explanation:

C = 1.8C +32C=1.8C+32

C = -40C=−40

T=-40+273.15=233.15\ KT=−40+273.15=233.15 K

Answer:

3.97×10^−19 J

From the planks equation

E=hv

V= c/ wave length

V= 3×10^8/500×10^-9

=6×10^14

E= hv

6.63×10^-34×6×10^14

= 3.97×10^−19 J

Explanation:

Answer:

An asteroid is a minor planet of the inner Solar System. Historically, these terms have been applied to any astronomical object orbiting the Sun that did not resolve into a disc in a telescope and was not observed to have characteristics of an active comet such as a tail.