A sample of helium behaves as an ideal gas as
it is heated at constant pressure from 283 K
to 393 K.
If 40 J of work is done by the gas during this process, what is the mass of the helium sample? The universal gas constant is
8.31451 J/mol · K.
Answer in units of g.

Answer:

\(\boxed {\boxed {\sf D. \ 6.02*10^{23} \ atoms}}\)

Explanation:

One mole of a substance contains the same amount of representative particles. These particles can be atoms, molecules, ions, or formula units. In this case, the particles are atoms of titanium.

Regardless of the particles, there will always be 6.02*10²³ (also known as Avogadro's Number) particles in one mole of a substance.

Therefore, the best answer for 1 mole of titanium is D. 6.02*10²³ atoms.

Answer:

D) 6.02 x 1023

Explanation:

A.P.E.X

The image of the bug that is seen by the fish is located 1.5 cm above the water's surface.

In this case, n₁ is the refractive index of water, n₂ is the refractive index of air (which is approximately 1.00), and the angle of refraction within the water is the same as the angle of incidence outside the water.

This can be determined using the equation for refraction: (n1/n₂) = (sin θ₂/sin θ₁), where n1 is the refractive index of air (1.00), n₂ is the refractive index of water (1.33), θ₁ is the angle of incidence (which is 90 degrees since the bug is directly above the water), and θ₂ is the angle of refraction. Solving for θ₂ gives us 48.75 degrees. Using basic trigonometry, we can then determine that the distance between the water's surface and the image of the bug is 1.5 cm.

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Answer:

~ 0.001 m/s^2

Explanation:

If you convert 12 miles per hour to, miles per second, it makes this easier to calculate, so do that first

12m/ 1 hour * 1 hour/ 60 mins * 1 min/ 60 sec = ~0.003333 miles per second.

Next remember that acceleration = velocity/time

So our new velocity: 0.003333 over time: 3 seconds = the acceleration.

0.003333/3 = 0.001 m/s^2

Answer:

40.56Hertz

Explanation:

v=f×lamda( I don't have the symbol)

from the question,

v=23,000

f=?

lamda i.e wavelength=567m

therefore, 23000=f×567

divide by 567

23000/567=567f/567

40.56 Hz=f

so, f=40.56Hz

The block was going 8.12 m/s at the bottom of the hill.

To find this, we can use the conservation of energy equation:
Initial kinetic energy + initial potential energy + work done by non-conservative forces = final kinetic energy + final potential energy

In this case, the initial potential energy is 0 (since the block is at the bottom of the hill), the final kinetic energy is 0 (since the block comes to a stop at the top of the hill), and the work done by non-conservative forces is -432 J (since this is the amount of thermal energy generated).

So the equation becomes:
Initial kinetic energy + 0 + (-432 J) = 0 + final potential energy

We can find the final potential energy by using the equation for gravitational potential energy:
PE = mgh
= (11 kg)(9.8 m/s^2)(6.4 m)
= 696.96 J

So now we can plug this into the conservation of energy equation:
Initial kinetic energy + 0 + (-432 J) = 0 + 696.96 J

Solving for the initial kinetic energy:
Initial kinetic energy = 1128.96 J

And finally, we can use the equation for kinetic energy to find the initial velocity of the block:
KE = 0.5mv^2
1128.96 J = 0.5(11 kg)v^2

Solving for v:
v = 8.12 m/s

So the block was going 8.12 m/s at the bottom of the hill.

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The distance at which the gravitational force will be zero is called the balance point, or the Lagrange point.

define distance ?

Distance refers to the amount of space between two points or objects. It is a scalar quantity and is measured in units of length, such as meters, feet, or kilometers. The distance between two points is equal to the length of the path connecting those two points.

The distance at which the gravitational force will be zero is called the balance point, or the Lagrange point. This distance can be calculated using the formula for the gravitational force between two masses and setting it equal to zero. However, the exact value of this distance would depend on the specific masses and distances involved, which are not specified in the question.

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Despite being two distinct ideas, phenotype and genotype are tightly intertwined. The term "phenotype" describes the physical characteristics of an organism that result from the expression of a person's genes.

The phenotype of an individual is determined by genotype. While an organism's genotype refers to its genetic makeup, its phenotype describes how it looks on the outside. The visible manifestation of a person's genes is their phenotype. Therefore, even an organism belonging to the same species may vary due to a slight variation in their genotype. The primary distinction between the two is this.

Their genotype could be used to decipher the human genetic code. It chooses which features or qualities to display. Even organisms with the same genotype might have different appearances. Periodically, both behavior and appearance change. In contrast, even identical-looking species do not share the same genotype.

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Answer:

..

Charcoal is flammable.

A planet the size of Venus at the same distance from the Sun as Earth may feature a thick carbon dioxide atmosphere, high temperatures, volcanic activity, rugged terrain, and potential evidence of tectonic activity.

There are various surface characteristics that may exist on a planet the size of Venus which is located at the same distance from the Sun as Earth.

A dense atmosphere mostly made of carbon dioxide, extreme surface temperatures that average over 900 degrees Fahrenheit (475 degrees Celsius), and strong greenhouse effects are only a few Venus-like characteristics.

There may be volcanic activity on the planet, with the possibility of massive shield volcanoes and vast lava plains. There could also be extensive expanses of rocky, hilly terrain as well as possible tectonic activity indicators like rift valleys or crustal deformations.

It is also conceivable that impact craters from meteorite impacts exist, albeit they would not be as noticeable because of Venus' dense atmosphere.

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Answer: The whole of it was owned originally by the lord of the manor. He lived in the big house called the manor house. Attached to it were many acres of grassland and woodlands called the park. These were the "demesne lands" which were for the personal use of the lord of the manor.

The lord of the manor previously owned the entire property. He resided in the substantial home known as the manor house.

Thus, The park, which covered many acres of grassland and trees, was connected to it. These "demesne lands" belonged to the lord of the manor and were used exclusively for his exclusive purposes.

The word "manor" is derived from the Old French word "manoir," which means "dwelling place," but a manor isn't just any old house.

The homes and grounds of the nobility were referred to as manors back when people still had titles of nobility. expressing to someone that his home is a manor is the equivalent of expressing that it is so lavish and beautiful that it could have belonged to a lord.

Thus, The lord of the manor previously owned the entire property. He resided in the substantial home known as the manor house.

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Answer:

well..

Explanation:

Liquid can flow but solid cannot because of differences in their properties

property of liquid which lets it flow:

property of solid which tends to obstruct flow:

Hope this helps!

Answer:

C

Explanation:

( I dun know how to explain it ‍ but i do know that the answer is C. Saw it in a past paper.)

The spring scale reads more than true weight as body jump because it measures the force exerted on it, which includes both weight and the additional force generated by your upward jump.

When standing motionless on the spring scale, it measured true weight, which is the gravitational force pulling you downward. However, when body jump upward, it generate an additional upward force. This force adds to the force of your weight, causing the spring scale to read more than true weight.

The spring scale works based on Hooke's law, which states that the force exerted on a spring is directly proportional to the displacement of the spring. As you jump, the spring inside the scale compresses or stretches due to the combined force of your weight and the upward force of body jump. Since the spring scale measures the total force exerted on it, it will read a value higher than your true weight.

It's important to note that the spring scale measures the total force, not the actual weight. To calculate true weight while jumping, would need to subtract the additional force generated by your jump from the reading on the scale.

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We used the Biot-Savart law. So the magnetic field at point C is [-1.64×10^-10 T, 0, -1.82×10^-10 T] Tesla.

To calculate the magnetic field at a given point due to a moving charge, we can use the Biot-Savart law:

B = (μ0/4π) * (q * v x r) / r^3

where B is the magnetic field, μ0 is the permeability of free space, q is the charge of the particle, v is the velocity of the particle, r is the position vector from the particle to the point where we want to calculate the magnetic field, and x denotes the vector cross product.

For part A, the position vector r = (0.02 m, 0 m, 0 m), and the velocity vector v = (0 m/s, 0 m/s, 3.8×10^7 m/s). The charge of an electron is -1.6×10^-19 C. Plugging these values into the formula, we get:

B = (4π×10^-7 T·m/A) * (-1.6×10^-19 C * [0, 0, 3.8×10^7 m/s] x [0.02, 0, 0]) / (0.02^3 m^3)

B ≈ [1.22×10^-5 T, 0, 0]

So the magnetic field at point A is [1.22×10^-5 T, 0, 0] Tesla.

For part B, the position vector r = (0 m, 0 m, 0.01 m), and the velocity vector v = (0 m/s, 0 m/s, 3.8×10^7 m/s). Plugging these values into the formula, we get:

B = (4π×10^-7 T·m/A) * (-1.6×10^-19 C * [0, 0, 3.8×10^7 m/s] x [0, 0, 0.01]) / (0.01^3 m^3)

B ≈ [0, -6.08×10^-11 T, 0]

So the magnetic field at point B is [0, -6.08×10^-11 T, 0] Tesla.

For part C, the position vector r = (0 m, 0.02 m, 0.01 m), and the velocity vector v = (0 m/s, 3.8×10^7 m/s, 0 m/s). Plugging these values into the formula, we get:

B = (4π×10^-7 T·m/A) * (-1.6×10^-19 C * [0, 3.8×10^7 m/s, 0] x [0, 0.02, 0.01]) / (0.022^3 m^3)

B ≈ [-1.64×10^-10 T, 0, -1.82×10^-10 T]

So the magnetic field at point C is [-1.64×10^-10 T, 0, -1.82×10^-10 T] Tesla.

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Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

is these what you're looking for?

Answer:

  (D) 4×10⁻³

Explanation:

The difference is ...

  0.2050 -0.2014 = 0.0036 = 3.6×10⁻³

The number 0.205 is expressed to a precision of 1×10⁻³, so the result of the subtraction operation cannot be considered to be more precise. It must be expressed as ...

  4×10⁻³ . . . . matches choice D

_____

Additional comment

This is physics, not math. In the physical sciences, most numbers must be considered to be measurements. (A few are definitions.) Hence, the rules of significant figures and precision apply to the results of arithmetic operations. This problem is a good illustration of what happens when computing small differences of large numbers. We start with 3 significant figures in 0.205, and end up with 1 significant figure in 0.004.

The organs of the circulatory system and the respiratory system are protected by the cutaneous system, the thoracic cage, and the immune system.

The cutaneous system is mainly made up of the skin. The skin is made of multiple layers of ectodermal tissue. It protects the body from UV radiations and also cold climatic conditions. The thoracic cage is also called as the rib cage. It is one of the main system that protects the vital organs.

The immune system protects the organs against infections from viruses, bacteria, fungi etc. The immune system is not like the other systems. Because it is made up of cells and not tissues. These cells are sterile.  

Therefore, the the three ways in which they are protected are by

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the answer will be 8 meters

Answer:

45 m

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 0.5 kg

Initial height (h₁) = 30 m

Initial potential energy (PE₁) = 20 J

Final potential energy (PE₂) = 30 J

Final height (h₂) =?

From:

PE = mgh

PE / h = mg = constant

Thus,

PE₁ / h₁ = PE₂ / h₂

With the above formula, we can obtain the final height of the bird as follow:

Initial height (h₁) = 30 m

Initial potential energy (PE₁) = 20 J

Final potential energy (PE₂) = 30 J

Final height (h₂) =?

PE₁ / h₁ = PE₂ / h₂

20 / 30 = 30 / h₂

Cross multiply

20 × h₂ = 30 × 30

20 × h₂ = 900

Divide both side by 20

h₂ = 900 / 20

h₂ = 45 m

Therefore, the final height of the bird is 45 m.

The ball's displacement is measured by d = v o t - (gt2) / 2, which is equal to 19.6 m - 4.9 m = 14.7 m.

Magnitude is simply "distance or quantity" in the context of physics. In term of mobility, it indicates the absolute or relative magnitude, orientation, and movement of the an item. Amplitude in physics generally refers to a quantity and amount.

Units of mass x length over time cubed are used to express the strength of a force. The most common unit in metric units is the newton (N), which really is equal to one kg times one meter above one second ( m / s).

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Answer:

Z = 1879.64 Ω = 1.879 KΩ

Explanation:

First, we will find the capacitive reactance of the capacitor:

\(X_{c} = \frac{1}{2\pi fc}\\\)

where,

Xc = Capacitive Reactance = ?

f = frequency = 50 Hz

C = Capacitance = 2 μF = 2 x 10⁻⁶ F

Therefore,

\(X_{c} = \frac{1}{2\pi(50\ Hz)(2\ x\ 10^{-6} F)}\\X_{c} = 1591.55\ \Omega\)

This is an RC series circuit. In the RC circuit the value of impedance is given by the following formula:

\(Z = \sqrt{R^2 + X_{c}^2}\\Z = \sqrt{(1000\ \Omega)^2 + (1591.55\ \Omega)^2}\\\)

Z = 1879.64 Ω = 1.879 KΩ

Answer:

One simple situation where the law of inertia can be observed is when a ball is placed on a flat surface and left undisturbed.

Explanation:

According to the law of inertia, an object at rest will remain at rest unless acted upon by an external force. In this case, the ball will remain stationary until some external force is applied to it. For example, if someone were to give the ball a push, it would begin to move, since the force overcomes the ball's initial state of rest. Similarly, if the surface the ball is on is inclined, the ball will remain stationary until a force, such as gravity, begins to act on it and cause it to roll downhill. This demonstrates the idea that objects at rest will remain at rest until acted upon by an external force, as described by the law of inertia.

Answer:

a)3.2m/s^2

b) -480,000N

Explanation:

mass of train= 150,000kg

velocity of train=40m/s

acceleration is negative

v^2=u^2-2as

v=0m/s

u=40m/s

s=250m

0=1600-500a

500a=1600

deceleration of 3.2m/s^2

newton's second law

F=ma

F= (150,000× -3.2)

F= -480,000N

To find the saturation specific humidity (SSH) of a parcel of air, we need to consider its saturation mixing ratio at different temperatures.

Let's go through the calculations step by step.

Given:

Temperature at the Earth's surface = 85 degrees Fahrenheit

Temperature at height of condensation = 75 degrees Fahrenheit

We know that the saturation mixing ratio represents the maximum amount of water vapor the air can hold at a specific temperature. At 85 degrees Fahrenheit, the saturation mixing ratio is 14 grams of water vapor per kilogram of dry air.

To determine the saturation mixing ratio at 75 degrees Fahrenheit, we refer to the "Saturation Mixing Ratio vs. Temperature" chart or equation. Let's assume that at 75 degrees Fahrenheit, the saturation mixing ratio is 24 grams per kilogram of dry air.

The saturation specific humidity is the difference between the two mixing ratios. In this case, it is:

SSH = 24 grams/kg - 14 grams/kg = 10 grams/kg

The SSH is expressed as a percentage of the saturation mixing ratio at the height of condensation. Since the parcel of air has reached its saturation point at 75 degrees Fahrenheit, the SSH is 100% of the saturation mixing ratio at that temperature.

Therefore, the correct answer is option D (100%).

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