We infer that the universe is expanding because distant galaxies all appear to:_____.
a. be growing in size.
b. be moving away from us, with more distant ones moving faster.
c. be made of dark matter.
d. rotate rapidly.

Answer:

10 ohm

Explanation:

Since the resistors are arranged in series, their total resistance is their sum.

Hence, Total R = 2+3+5 = 10 ohm

Human activity is responsible for recent changes in the atmosphere i.e. the last option , projected data for future atmospheric conditions at current rates of change.

Therefore we can said that, The last option from the question projected data for future atmospheric conditions at current rates of change, states that human activity is to responsible for recent changes in the atmosphere.

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Answer:

ntensive properties: A physical property that will be the same regardless of the amount of matter.

Explanation:

Answer:

33 miles

Explanation:

10 + 15 + 8 = 33

According to corollary discharge theory, movement is perceived when the brain receives a copy of the motor command and compares it with incoming sensory feedback to generate a perception of self-motion.

According to corollary discharge theory, movement is perceived through a mechanism involving two signals: the motor command signal and the corollary discharge signal. The motor command signal is sent from the brain to the muscles to initiate movement, while the corollary discharge signal is a copy of the motor command that is sent to sensory areas of the brain.

The corollary discharge signal allows the brain to predict the sensory consequences of the movement before they occur. By comparing the predicted sensory feedback with the actual sensory feedback received during movement, the brain can distinguish between self-generated sensory signals and external sensory signals, thus allowing the perception of movement.

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Explanation:

Any two uses of magnetic force are:-

Answer:

It is the process in which animals eat each other in the food chain. From producers (like grass) to the top of the food chain (which depends on the climate and habitat)

Explanation:

The notch sensitivity and fatigue stress concentration factors for the bar are calculated to determine the mean and alternating stresses and find the fatigue strength for different cycles.

To calculate the notch sensitivity and fatigue stress concentration factors, we need to consider the presence of the 10 mm hole in the center of the 30 mm side of the bar. The notch sensitivity factor quantifies the effect of the hole on the stress concentration, while the fatigue stress concentration factor determines the increase in stress due to cyclic loading.

The mean stress (σm) is the average of the minimum (F_min) and maximum (F_max) axial loads applied to the bar. The alternating stress (σa) is half the difference between F_max and F_min.

The fatigue strength for a certain number of cycles is determined by applying the appropriate factors to the ultimate tensile strength (S_Ut) or yield strength (S_y) of the material. The fatigue strength is typically given for a specified number of cycles, such as 100, 10,000, 100,000, or 1,000,000 cycles. The fatigue strength for infinite life refers to the stress level below which the material can withstand an unlimited number of cycles without failure.

To provide accurate values for the notch sensitivity, fatigue stress concentration factors, mean and alternating stresses, and fatigue strength for the specified number of cycles, further calculations and data specific to the material properties and geometry of the bar are required.

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Answer:

The student that says the phrase "travels through liquids" goes in the middle, in between the two circles in the venn diagram.

Explanation:

The apparent weight of the rock when submerged in water is 71.33 N. The apparent weight of the rock when submerged in a liquid with density 1.6 times that of water is 53.89 N.

We can use Archimedes' principle to find the apparent weight of the rock when submerged in water. The buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object. Thus, the buoyant force on the rock when submerged in water is:

buoyant force = weight of water displaced = density of water x volume of rock x acceleration due to gravity

where the density of water is 1000 kg/m^3.

The weight of the rock in water is then:

weight in water = weight in air - buoyant force

Part 1:

Substituting the given values into the equation above, we get:

buoyant force = (1000 kg/m^3) x (.00292 m^3) x (9.8 m/s^2) = 28.67 N

weight in water = 100 N - 28.67 N = 71.33 N

Therefore, the apparent weight of the rock when submerged in water is 71.33 N.

Part 2:

If the rock is submerged in a liquid with a density exactly 1.6 times that of water, the buoyant force would be:

buoyant force = (1.6 x 1000 kg/m^3) x (.00292 m^3) x (9.8 m/s^2) = 46.11 N

The weight of the rock in this liquid would be:

weight in liquid = 100 N - 46.11 N = 53.89 N

Therefore, the apparent weight of the rock when submerged in a liquid with density 1.6 times that of water is 53.89 N.

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Answer:

3.038 m/s^2

Explanation:

What we have

m = 6.0 kg

\(\mu_{k}\) = 0.20

\(\mu_{s}\) = 0.40

\(F_{applied}\) = 30 N

Since the situation is that the box has already been pushed, lets get the total net force of both components.

∑Fy = \(ma_{y}\) = 0 (bc the normal and weight cancel out each other)

∑Fx = \(F_{applied}\) - \(f_{k}\) = \(ma_{x}\) (We are going to use this equation to find acceleration)

To find the friction force

\(f_{k}\) = \(\mu_{k}\) * N

\(f_{k}\) = .20 * 6.0 kg * 9.81 m/s^2 = 11.772 N

Now we can use ∑Fx equation to actually find the acceleration of the box!

∑Fx = \(F_{applied}\) - \(f_{k}\) = \(ma_{x}\)

Plug it in

30 N - 11.772 N = 6 kg * a

Do the algebra...

a = \(\frac{30 N - 11.772 N}{6 kg}\) = 3.038 m/s^2

The cyclotron frequency (ω) of an electron in the ionosphere is 1.3 MHz. To find the magnetic field flux density (B), we can use the formula ω = eB/m, where e is the electron charge, B is the magnetic field flux density, and m is the electron mass.

Rearranging the formula, we get B = ωm/e. Substituting the given values, we get B = (1.3 x 10^6) x (9.11 x 10^-31)/(1.6 x 10^-19) = 9.1 x 10^-5 T = 91 µT (microtesla).

To find the magnetic field intensity (H) in amperes per meter (A/m), we can use the formula H = B/μ, where μ is the permeability of free space (4π x 10^-7 H/m).

Substituting the calculated value of B, we get H = (9.1 x 10^-5)/(4π x 10^-7) = 22.9 A/m. Therefore, the magnetic field flux density in µT is 91 µT, and the magnetic field intensity in A/m is 22.9 A/m.

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Answer:

Hey buddy, here is your answer.Hope it helps you.

Explanation:

A catapult is a launching device that allows us to experimentally observe projectile motion. Once the ball is launched, the only forces acting are gravity and air resistance.

Answer:

A

Explanation:

When two magnets are brought near each other, like poles repel; opposite poles attract. We like to represent this force effect of a magnet on iron-like objects with a concept called magnetic field. The concept of field can be best understood if we remember the gravitational force of Earth on object near it.

Every magnet has two poles. The same pole repels while opposite poles attract each other. Option (A) is correct. The poles that face each other are opposite magnetic poles.

A magnet is a substance or item that generates a magnetic field. This magnetic field is invisible, but it is responsible for a magnet's most remarkable property.

A force that attracts or repels other ferromagnetic elements such as iron. Every magnet has two poles. The same pole repels while opposite poles attract each other.

Due to polarity Option (A) is correct. Hence the poles that face each other are opposite magnetic poles.

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The spectrum observed from the Sun (or any star) would exhibit an absorption spectrum. This is because the outer gaseous atmosphere of the star absorbs specific wavelengths of light, resulting in dark absorption lines in the spectrum.

In the cooler, lower-density outer atmosphere, where white light from the star travels, some atoms or molecules in the atmosphere absorb photons with particular energy. In the spectrum, these absorptions show up as black lines at specific wavelengths. The specific set of absorption lines that each element or molecule generates results in a distinctive pattern that can be used to identify the elements that are present in the star's atmosphere.

The absorption spectrum offers insightful data on the chemical make-up and physical characteristics of the star. Astronomers can ascertain the elements present, their abundances, and other characteristics like the temperature, pressure, and velocity of the star's atmosphere by examining the absorption lines.

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The refractive index is  1.620.

To find the refractive index of the material, we will use Snell's Law, which relates the angles of incidence and refraction to the refractive indices of the materials. The equation for Snell's Law is:

n1 * sin(θ1) = n2 * sin(θ2)

Here, n1 and n2 are the refractive indices of the material and air respectively, and θ1 and θ2 are the angles of incidence ( angle made with normal)and refraction.

Given the information in the question:
- Angle of incidence (θ1) = 16°
- Angle of refraction (θ2) = 26°
- Refractive index of air (n2) = 1 (since air has a refractive index very close to 1)

Now, we can plug these values into Snell's Law to find the refractive index of the material (n1):

n1 * sin(16°) = 1 * sin(26°)

To solve for n1, divide both sides by sin(16°):

n1 = sin(26°) / sin(16°)

Now, calculate the values:

n1 ≈ 1.620

Therefore, the refractive index of the material is approximately 1.620.

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Answer:

The unit of the equation P·V = n·R·T is the Joules which is the same as the unit of energy

Explanation:

The unit of energy is Joules, with symbol J

The given equation for an ideal gas is P·V = n·R·T

Where;

P = The pressure of the gas with units Pascals, Pa

V = The volume of the gas, with units m³

n = The number of moles with unit moles

R = The universal gas constant = 8.314 J/(mol·K)

T = The temperature, with units, Kelvin, K

Therefore, we get;

P·V has unit 1 Pa × 1 m³ = 1 N/m² × 1 m³ = 1 N·m = 1 Joule

Similarly, we get

n·R·T with units n mole × 8.314 J/(mol·K) × 1 K = 8.314·n Joules

Therefore, P·V = n·R·T, has the unit of Joules which is the same unit with energy.

This lamp's estimated current consumption is 8 amperes.

Electric current is the rate of charge (electron) passing in a conductor. The SI unit for electric current is the ampere. As current does not obey vector addition, it is a scalar quantity.

Given information:

amount of charge flowing through the lamp, Q = 28800 C;

The charge flow time was t = 1 hour = 3600 seconds.

Hence, the current passing through the bulb as a result.

I = Q/t

= 28800/3600 ampere,

= 8 ampere

Therefore, this lamp consumes 8 amperes of current.

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The time constant of the circuit is 0.24 seconds, which represents the time it takes for the capacitor to charge to 63.2% of its maximum charge.

The time constant (τ) of an RC circuit is given by the equation τ = RC, where R is the resistance and C is the capacitance. In this case, R = 50.0 ohms and C = 12.0 microfarads, so τ = (50.0 ohms)(12.0 microfarads) = 0.60 milliseconds or 0.00060 seconds.

The time constant represents the time it takes for the capacitor to charge to 63.2% of its maximum charge or discharge to 36.8% of its initial charge. In this circuit, when the switch is closed at t = 0.00s, the capacitor will begin to charge, and it will reach approximately 63.2% of its maximum charge after a one-time constant, or 0.24 seconds.

Therefore, it takes 0.24 seconds for the capacitor in the circuit and charge up to approximately 63.2% of its maximum charge.

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Answer:

they would repel because they have the same charge. Charges that are different will stick together.

Answer:

The light traveling in any one direction in a straight line is called a ray of light. A group of light rays given out from a source is called a beam of light.

Explanation:

Candle and electric bulbs. The rays coming out from the candle and electric bulb is divergent beam of light.A beam of light is made up of bundles of closely spaced parallel rays.

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Answer:

The light going in any one course orderly is known as a beam of light. A light beam gathering from a source is known as light emission.

That's the definition of a beam of light.

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The law of conservation of linear momentum states that the total momentum of a system is always conserved and the consequence is that the system must be isolated.

The law of conservation of linear momentum states that in an Isolated system, the total momentum of the system is always conserved.

Mathematically, the formula for the conservation of linear momentum is given as;

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

where;

Based on the law of the conservation of linear momentum, the sum of the initial momentum of the system will be equal to the sum of the final momentum of the system provided the system is isolated.

Thus, the consequences of conservation of linear momentum is that the total momentum of the system will not be conserved if the system is not isolated.

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Answer:

The block that is dropped straight down will have the greatest speed before hitting the ground. This is because it has no initial horizontal velocity, so all of its potential energy is converted into kinetic energy as it falls. The other blocks have some initial horizontal velocity, so some of their potential energy is converted into kinetic energy in the horizontal direction. This means that they will have a lower speed when they hit the ground.

Explanation:

The potential energy of an object is given by the equation:

PE = mgh

KE = 1/2 mv^2

When an object is dropped, its potential energy is converted into kinetic energy. The equation for the conservation of energy can be used to express this relationship:

PE = KE

mgh = 1/2 mv^2

v^2 = 2gh

v = sqrt(2gh)

The velocity of an object that is dropped is directly proportional to the square root of the height from which it is dropped.

The blocks in the question are all dropped from the same height. However, the block that is dropped straight down has no initial horizontal velocity. The other blocks have some initial horizontal velocity. This means that the block that is dropped straight down will have a greater speed when it hits the ground than the other blocks.

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Answer:

that is what I got for my answer

Explanation:

I Calculate it and I got 1600

Answer:

"we both attract each other with the same force but we know that attraction between two bodies depends upon their mass, greater the mass of two bodies is the force of attraction between them"(got this off the internet).

Answer:

Decreases by \($3.6 \times 10^{-3}$\) times

Explanation:

The intensity of a sound is defined as the energy of the sound that is flowing in an unit time through the unit area which is in the direction that is perpendicular to the direction of the sound waves movement.

The intensity of energy is described by the inverse square law. It states that the intensity varies inversely with the distance square of the distance.

In other words, the sound intensity decreases as inversely proportional to the squared of the distance.  i.e. \($\frac{1}{r^2}$\)

In the context when the distance was 3 m, the intensity of the sound was = \($\frac{1}{9}$\)

But when the distance became 6 cm or 0.06 m, the sound intensity decreases by =  \($\frac{1}{0.06^2}$\)

                       = \($3.6 \times 10^{-3}$\) times

One way by which global warming aggravates the effect of radiation is through greenhouse effect

The combined effects of global warming and radiation is explained as follows.

Global warming is the gradual increase in the temperature of the Earth's surface (land), ocean and the atmosphere through the heat from the radiation of the sun.

One way by which global warming aggravates the effect of radiation is through greenhouse effect.

This greenhouse effect aggravates the effect of radiation.

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Answer:

Compound 'A' C5H12 does not react with phenyl hydrazine. Oxidation of 'A' with K2Cr2o7,/H" gives B' (c5H10o). Compound 'B' reacts with phenyl hydrazine but does not give Tollen's test. The