what is the vapor pressure of ethanol (in mmhg) at 34.9 °c if its vapor pressure is 400.0 mmhg at 63.5 °c? (∆hvap = 39.3 kj/mol; r = 8.314 j/k • mol)

Answer:

Positive

when a negatively charged rod is bring near uncharged spherical conductor it attracts positive charge and repels negative charges

so In left side all positive charges appears and in right side all negetive

Types of methods of charging

Answer:

\(125\:\mathrm{minutes\: or\: }2.08\bar{3}\: \mathrm{hours}\)

Explanation:

Speed is given by \(s=\frac{d}{t}\), where \(d\) is distance travelled and \(t\) is time. Rearranging this equation, we have \(t=\frac{d}{s}\).

Plugging in our given information:

\(t=\frac{d}{s}=\frac{1500\:\mathrm{km}}{720\:\mathrm{km/h}}=2.08\bar{3}\: \mathrm{hours}\)

Thus, our answer is:

\(2.08\bar{3}\: \mathrm{hours}\cdot \frac{60\:\mathrm{minutes}}{1\:\mathrm{hour}}=\fbox{$125\:\mathrm{minutes}$}\)

dP/dt = (0.831 - 0.2P) / 100, where P represents pressure (in kilopascals).

This equation represents the rate at which the pressure is changing with the given conditions of temperature and volume.

To find the rate at which the pressure is changing, we need to use partial derivatives. Given the equation PV = 8.31T, we can differentiate both sides of the equation with respect to time t.

Differentiating both sides with respect to time t, we get:

P(dV/dt) + V(dP/dt) = 8.31(dT/dt)

Now, let's substitute the given values:

dT/dt = 0.1 K/s (rate of temperature change)

dV/dt = 0.2 L/s (rate of volume change)

T = 300 K (temperature)

V = 100 L (volume)

Plugging in the values into the equation:

P(0.2) + 100(dP/dt) = 8.31(0.1)

0.2P + 100(dP/dt) = 0.831

Now, we can solve for dP/dt:

100(dP/dt) = 0.831 - 0.2P

dP/dt = (0.831 - 0.2P) / 100

Therefore, the rate at which the pressure is changing when the temperature is 300 K and increasing at a rate of 0.1 K/s, and the volume is 100 L and increasing at a rate of 0.2 L/s is given by:

dP/dt = (0.831 - 0.2P) / 100

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Answer: Sound waves can travel through solids, liquids, and gasses.

Explanation:

Sound waves can travel through various mediums such as solids, liquids, and gases. In solids, sound can travel through the molecules of the material, while in liquids and gases, sound waves propagate through the vibration of the molecules. Sound waves can also travel through plasma, which is a state of matter similar to gases but where the particles are ionized. However, the speed of sound and its behavior can vary depending on the medium through which it travels.

The  resistance increased in the circuit during experiment #3, the voltage decreased while the current decreased.

This is in accordance with Ohm's Law, which states that the voltage (V) across a conductor is directly proportional to the current (I) passing through it, but inversely proportional to the resistance (R) of the conductor. So, as the resistance increases, the voltage decreases in order to maintain a constant current flow. Similarly, as the resistance increases, the current also decreases, as there is less flow of electrons through the circuit.

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Answer:

When unbalanced forces act on an object at rest, the object will move. ... Second, when unbalanced forces act on a moving object, the velocity of the object will change. Remember that a change in velocity means a change in speed, direction or both speed and direction.........Eg.If you kick a football and it moves from one place to another, it means that unbalanced forces are acting upon it. Ball moves from one place to another after kicking it.

Answer:

unbalanced forces could change speed,direction

Explanation:

Example

if two people are pulling a rope and the other one is stronger the rope moves toward the stronger one cause the force is unbalanced

The specific heat capacity of water is 1 calorie per gram per degree Celsius. This means that 1 gram of water will absorb 1 calorie of heat for every 1 degree Celsius increase in temperature.

In this case, we have 32.0 grams of water that is heated from 25.0 degrees Celsius to 80.0 degrees Celsius. The change in temperature is therefore 80.0 - 25.0 = 55.0 degrees Celsius.

The amount of heat absorbed by the water is therefore 32.0 x 55.0 = 1760 calories.

To convert calories to joules, we can use the following conversion factor:

1 calorie = 4.184 joules

Therefore, the amount of heat absorbed by the water in joules is 1760 x 4.184 = 7374 joules.

Therefore, the answer to your question is that 32.0 grams of water absorbs 7374 joules of heat when it is heated from 25.0 degrees Celsius to 80.0 degrees Celsius.

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Explanation:

The energy of a photon is given by :

\(E=\dfrac{hc}{\lambda}\)

Where

h is Planck's constant

c is the speed of light

\(\lambda\) is wavelength

or

\(E=hf\), f is the frequency

Energy is directly proportional to the frequency of an object.

The energy transported by a wave is directly proportional to the square of the amplitude.

Answer: c living in a camber in an under water habitat

Explanation:

Answer:

Time in air t = 1.38 second (Approx)

Explanation:

Given:

Initial speed u = 0 m/s

Final speed v = 13.5 m/s

Find:

Time in air t

Computation:

v = u + gt

g = 9.8 m/s²

13.5 = 0 + (9.8)(t)

13.5 = 9.8 t

t = 13.5 / 9.8

t = 1.3777 second

Time in air t = 1.38 second (Approx)

"Suppose an earthquake occurs on an imaginary planet. Scientist on the other side of planet detect primary waves but not secondary waves after quake occurs. This suggests that a part of planet's interior is liquid."

The interior core is solid, and the outer core is liquid, according to seismic waves. The magnetic field and metallic meteorites both provide information about the composition of the centre. The primary reason for Earth's interior being liquid is due to the pressure on the core from Earth's outer layers.

A liquid medium slows down seismic vibrations. On Earth, molten regions slow down P waves and halt them altogether because S waves only travel through solids and have a shearing motion.

The movement has the fastest pace in the materials, which enables seismograms to pick it up first. Compared to surface and S waves, the P wave has a shorter wavelength and a greater frequency.

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Answer:

the exact center of its mass

Answer:

B. They will attract one another

Explanation:

When two pieces of silk that have acquired an electric charge are brought close together, they will either attract or repel each other, depending on the nature of the charges.

If the two pieces of silk have the same type of charge (both positive or both negative), they will repel each other. This is because like charges repel each other.

On the other hand, if the two pieces of silk have opposite charges (one positive and one negative), they will attract each other. This is because opposite charges attract each other.

Therefore, the answer is B. They will attract one another if they have opposite charges, and they will repel each other if they have the same charge.

Option (B) many

According to the lesson, it can be said that many adults have some of the same problems with sleep that Bailey does.

Sleeplessness is one of the most common issues, every second adult or a teenager is facing now a days. Due to a lot of responsibilities, we end up having little time for sleep and this in turn affects our body functions.

Good sleep hygiene is often recommended to improve sleep quality, which  also helps in alleviating anxiety due to work load and responsibilities.

Answer is Option (B) many

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Answer:

A wave carries energy

Explanation:

According to the third law, when two objects interact, they exert forces on one another that are both equal in strength and directed in the opposite direction.

Therefore,

A) F grave = 2.98 = 19.6

F tens = 3 N

a = 11.25 m/s², down (dir'n)

F net = 22.5  N, down (dir'n)

B)  F tens = 109.6 N

F grave = 2.98 = 19.6

a = 45 m/s², up (dir'n)

F net = 90 N, up (dir'n)

C)  F grave = 500.98 = 4900 N

F norm = 3100 N

a = 16 m/s², down (dir'n)

F net = 8000 N, down (dir'n)

D) F norm = 19,300 N

F grave = 500.98 = 4900 N

a = 28.8 m/s², up (dir'n)

F net = 14400 N, up (dir'n)

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When the partial pressure of water equals the saturated vapor pressure, this is commonly called "equilibrium."

In the context of water vapor, equilibrium occurs when the rate of evaporation and the rate of condensation are in balance. At equilibrium, the amount of water molecules transitioning from the liquid phase to the vapor phase (evaporation) is equal to the amount of water molecules transitioning from the vapor phase to the liquid phase (condensation). This equilibrium state results in a constant concentration of water vapor in the air. The saturated vapor pressure refers to the maximum pressure that water vapor can exert when it is in equilibrium with its liquid phase at a particular temperature. It represents the point at which the air is holding as much moisture as it can at that specific temperature.

When the partial pressure of water vapor in the air matches the saturated vapor pressure at a given temperature, the air is holding the maximum amount of water vapor it can at that temperature. Any additional increase in water vapor would result in condensation, where water molecules transition from the vapor phase to the liquid phase.This state is commonly referred to as "saturation" because the air is saturated with moisture, and any further increase in water vapor would lead to the formation of liquid water.

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Answer:

The amount of pressure delivered to them

Explanation:

The axial resistance of an axon is calculated using the formula R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area. In this case, the axial resistance is 11.28 MΩ.

The resistance along the axon is calculated using the following formula:

R = ρL/A

where:

R is the resistance in ohms

ρ is the resistivity in ohms per meter

L is the length in meters

A is the cross-sectional area in meters squared

In this case, we have:

ρ = 1.6 x 107 Ω.m

L = 0.5 mm = 0.0005 m

A = πr² = π(5 x 10-6)² = 7.854 x 10-13 m²

Therefore, the resistance is:

R = ρL/A = (1.6 x 107 Ω.m)(0.0005 m) / (7.854 x 10-13 m²) = 11.28 MΩ

Therefore, the axial resistance of the axon is 11.28 MΩ.

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the average kinetic energy for 1.00 mol he atoms at 300 K is: 6.211 × 10⁻²¹ J

The average kinetic energy of a gas molecule is calculated as the product of the RMS speed squared and half of the mass of each gas molecule. It is as follows mathematically: m is the mass. V stands for RMS velocity. A substance's average kinetic energy is directly inversely related to its Kelvin temperature. For instance, the average kinetic energy of hydrogen gas particles at 200 K is double that of hydrogen gas particles at 100 K.

Average kinetic energy (K) = 3/2 × (R/N_A) × T

Given that,

no. of moles = 1 mol

temperature (T) = 300 K

K = 3/2 × (8.314/ 6.023 × 10²³ ) × 300

K = 6.211 × 10⁻²¹ J

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In comparison to the light reflected from the front surface, the light reflected from the back surface (side of the angle of incidence) will travel further.

What is light reflection?

When light strikes a smooth surface, it can bounce back, a process known as reflection.

On reflecting surfaces like mirrors, slick metal surfaces, and crystal-clear water, incident light rays are reflected according to the rules of reflection.

According to the law of reflection,

All three rays—the incident, reflected, and normal—lie on the same plane.

The angle of reflection = Angle of incidence

When light collides with a surface of a certain thickness, its speed will drop.

Since

n1sin(i) = n2sin(r),

where;

i stands for incident angle.

The refraction angle is given by r.

The light reflected from the back surface (side of the angle of incidence) will therefore travel further than the light reflected from the front surface for a film with thickness d and an incident angle of 90 degrees.

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The equation will be of the given statement:

y(x,t)  = (0.084)sin(18x - 5.2t)

The distance a wave travels from one crest to another or from one trough to another is known as its wavelength (which may be an electromagnetic wave, a sound wave, or any other wave). The peak of the wave is called the crest, while the trough is its base.

wavelength  = 35cm = .35m

amplitude A =  8.4 cm

Time  = 1.2s

The speed of this wave:

In the positive x direction, the wave is moving in a string. For these circumstances, we must write the wave equation.

When the wave is moving in the +x direction, the following general equation describes it:

Y = Asin( kx - wt )

A is amplitude

k is propagation constant

k = 2π/λ

k = 2π/0.35

k = 17.95 = 18m^-1

ω is angular frequency

ω = 2π/T

ω = 2π/1.2

ω = 5.23s^-1

The equation will be:

y(x,t)  = (0.084)sin(18x - 5.2t)

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I understand that the question you are looking for is:

A wave traveling in a string in the positive x direction has a wavelength of 35 cm, an amplitude of 8.4 cm, and a period of 1.2 s. What is the wave equation (in base SI units) that correctly describes this wave

Answer:

72 meters

Explanation:

Breaking distance is directly proportional to the speed squared.

d = k v²

When v = 12 m/s, d = 32 m.

32 = k (12)²

k = 2/9

d = 2/9 v²

When v = 18 m/s:

d = 2/9 (18)²

d = 72

Answer:

A

Explanation:

I only think its A because of the gravity part...sorry im not good at explaining

Answer:

100 m/s

Explanation:

Speed increases at a rate of 10 m/s (actually 9.8 m/s) every second. Thus after 10 seconds, the speed is 10 x 10 = 100 m/s.

The acronym FN on a force diagram would represent Normal Force. That is option C.

A force diagram is the type of diagram that illustrates the different types of forces acting on an object.

The types of forces that can be represented by a force diagram include the following:

The normal force (FN) is the force that is acting of the object which is perpendicular to the surface the object is in contact with.

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Answer:

C~

Explanation:

Fn is normal, if it's negative then it's most likely -Fn.

Have a good day.

Answer:

It will take 5.33 seconds

Explanation:

Divide the distance per velocity:

64/12 = 5.33

The velocity of the two-block system at the top of the ramp is half the initial velocity of the second block. However, the force due to gravity exerted on both blocks as they travel up the ramp is not relevant to the conservation of momentum because it is a conservative force that does not affect the total momentum of the system.

The total momentum of the system before the collision is equal to the momentum of the second block, which is given by:

p = mv0

where m is the mass of each block, and v0 is the initial velocity of the second block.

After the collision, the two blocks move together with an unknown velocity vr. The total momentum of the system after the collision is:

p' = (2m)vr

where 2m is the total mass of the two blocks, and vr is the final velocity of the system.

The conservation of momentum states that the total momentum of an isolated system remains constant, provided no external forces act on it. Therefore, the total momentum of the system before the collision is equal to the total momentum of the system after the collision:

p = p'

Substituting the expressions for p and p' gives:

mv0 = (2m)vr

Simplifying gives:

vr = v0/2

The velocity of the system can be measured to confirm that the conservation of momentum applies to the system.

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