A person weighs 734 N. What is their mass?

If the wave velocity and frequency of a wave are both doubled, the wavelength will remain the same.

The wavelength of a wave shows the spatial orientation of distance between two successive crest in a wave medium.

The wavelength λ is expressed by using the relation:

\(\mathbf{\lambda = \dfrac{v}{f}}\)

Now, if velocity and  frequency of wave is both doubled, the wavelength will   remain the same.

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Answer:A rock moving through a gravitational field is analogous to a "massive" charge moving through an electric field.

Just as a charged particle experiences a force when moving through an electric field, a massive object experiences a force when moving through a gravitational field. The strength of the force depends on the mass of the object and the strength of the field. This is described by Newton's law of gravitation.

Explanation:

A rock moving through a gravitational field is analogous to a positive or negative charge moving through an electric field

Comparison between gravitational field and electric field:

A rock moving through a gravitational field is analogous to a positive or negative charge moving through an electric field, depending on the direction of the gravitational force and the sign of the charge.

Both the gravitational field and the electric field are conservative fields that exert a force on objects or charges within their respective fields.

However, the strength and nature of the force depend on the mass or charge of the object or particle, as well as the distance and direction from the source of the field.

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Answer:

HLW ITS JESS BREGOLI

YOUR ANSWER IS HERE

At different points on Earth's surface, the free fall acceleration ranges from 9.764 m/s2 to 9.834 m/s2[2] depending on altitude and latitude, with a conventional standard value of exactly 9.80665 m/s2 (approximately 32.17405 ft/s2). Locations of significant variation from this value are known as gravity anomalies.

Explanation:

HOPE IT MAY HELP YOU !!

The speed of the car after 5 seconds, given that the car has a uniform acceleration of 2 m/s² is 10 m/s

The following data were obtained from the question:

The final speed of the car can be obtained as demonstrated below:

v = u + at

Inputting the various parameters, we have

v = 0 + (2 × 5)

Clear bracket

v = 0 + 10

v = 10 m/s

Thus, from the above calculation, we conclude that the speed after 5 seconds is 10 m/s

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Clear question:

A car starts at rest and has a uniform acceleration of 2 m/s² .Find the speed of the car the car after 5 seconds.

The speed of the boat relative to the water is 9.08 m/s, when the boat takes 14 minutes to cross the river.

We can decompose the velocity of the boat into two components: one parallel to the river, and one perpendicular to it. Let's call the parallel component \(v_p_a_r\) and the perpendicular component \(v_p_e_r_p\):-

\(v_p_a_r = v_b_o_a_t cos\theta\)

\(v_p_e_r_p = v_b_o_a_t sin\theta\)

The boat will travel a distance of 102 m across the river, which will take 14 minutes or 840 seconds. Therefore, the distance traveled parallel to the river will be:

\(d_p_a_r = v_p_a_r * t = v_b_o_a_t cos\theta * 840 s\)

The distance traveled perpendicular to the river will be:

\(d_p_e_r_p = v_p_e_r_p * t = v_b_o_a_t sin\theta * 840 s\)

The boat will end up at a point directly north of its departure point on the south bank, which means that \(d_p_e_r_p = 102 m\). Therefore, we can solve for \(v_b_o_a_t\) as follows:

\(v_b_o_a_t sin\theta * 840 s = 102 m\)

\(v_b_o_a_t sin\theta = 102 m / 840 s\)

\(v_b_o_a_t sin\theta = 0.1214 m/s\)

To solve for \(v_b_o_a_t\):-

\(tan\theta = d_p_a_r / d_p_e_r_p\)

\(tan\theta = (v_p_a_r * t) / (v_p_e_r_p * t)\)

\(tan\theta = v_p_a_r / v_p_e_r_p\\tan\theta = v_b_o_a_t cos\theta / (v_b_o_a_t sin(\theta))\\\)

Reserving the value of \(d_p_e_r_p\) and solving for \(\theta\):-

\(\theta = arctan(v_p_a_r / (102 m / 840 s))\\\theta = arctan(v_b_o_a_t cos(\theta) / 0.1214 m/s)\)

\(v_p_a_r^2 + v_p_e_r_p^2 = v_b_o_a_t^2\\(v_b_o_a_t cos(\theta))^2 + (v_b_o_a_t sin(\theta))^2 = v_b_o_a_t^2\)

\(v_b_o_a_t^2 (cos^2(\theta) + sin^2(\theta)) = v_b_o_a_t^2\\v_b_o_a_t^2 = 102^2 / (cos^2(\theta) + sin^2(\theta))\\v_b_o_a_t = \sqrt{[102^2 / {cos^2(\theta) + sin^2(\theta)}]}\)

Reserving the value of \(\theta\):-

\(v_b_o_a_t = \sqrt{[102^2 / {cos^2(\theta) + sin^2(\theta)}]} \\v_b_o_a_t = 9.08 m/s\)

Therefore, the speed of the boat relative to the water is 9.08 m/s.

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Answer:

360 degrees is one full rotation starting at zero

it take 2 s  to the flag to rotate once in a full circle  with 3 rad/s of angular velocity.

Angular velocity is "rate of change of angular displacement with respect to time". i.e. ω= dθ/dt. it is also defined as angular displacement over time. i.e. ω = angular displacement/Time.

Angular velocity shows how much angle can be covered in unit time. It's SI unit rad/s.

Angular acceleration is rate of change of Angular velocity with respect to time.

i.e. α = dω/dt if an object changes its angular velocity in short time, we can say that it has greater angular acceleration. It is expressed in rad/s².

In this problem we have to calculate time, but the angular velocity id not given.

Consider the angular velocity is 3 rad/s.

Given,

Angular displacement θ = 2π

angular velocity ω = 3 rad/s

Time t = ?

Time = θ/ω

Time = 2π/3 rad/s = 2 s

Hence the answer is 2s.

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Answer:

first one is  series second one is paralle

Explanation:

The following calculation can be used to calculate how much work the windmill has to accomplish in order to fully charge the electric car: Energy + Work

Wind turbines operate on a straightforward premise: rather than using power to create wind, like a fan, they create electricity using wind. To generate power, a turbine's blades, which resemble propellers, revolve around a rotor.

The ratio of the power that is caught by the wind turbine rotor, PR, divided by the total power that is now available in the wind, P, is known as the coefficient of performance, or CP.

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Answer:

1450.4 KN\(m^{2}\)

Explanation:

Pressure = ρhg

where: ρ is the density of the liquid, h is the height and g the force of gravity.

Total pressure exerted by the liquids at the base = Pressure of oil + Pressure of water + Pressure of mercury

So that,

i. Pressure of oil = ρhg

(ρ = 0.8 g/cm³ = 800 kg/m³)

                        = 800 x 5 x 9.8

                        = 39200

Pressure of oil = 39200 N\(m^{2}\)

ii. Pressure of water = ρhg

(ρ = 1 g/cm³ = 1000 kg/m³)

                                      = 1000 x 8 x 9.8

                                     = 78400

Pressure of water = 78400 N\(m^{2}\)

ii. Pressure of mercury = ρhg

(ρ = 13.6 g/cm³ = 13600 kg/m³)

                      = 13600 x 10 x 9.8

                      = 1332800

Pressure of mercury = 1332800 N\(m^{2}\)

So that,

Total pressure exerted by the liquids at the base = 39200 + 78400 + 1332800

                                               = 1450400

                                               = 1450.4 KN\(m^{2}\)

Total pressure exerted by the liquids at the base is 1450.4 KN\(m^{2}\).

From the ground, a ball is hurled straight up. A 2-m-high window is passed by it. The ball's starting velocity is 4.82 m/s because the bottom of the window is 7.5 metres above the ground.

Level ground refers to the lowest level of a structure when the majority of its height is exposed above the ground level of the nearby street or riverwalk. The floor that is level with the ground is referred to as the first floor in American English, followed by the floor that is above it and so on. The term "Ground Level" refers to the height of the main construction entrance to the structure or building.

Walking, slipping, tripping, transfers (such as getting up from a chair or bed), falling from furniture (such as a bed or sofa), picking something up off the ground, and standing tasks were all considered to be ground level activities (e.g., washing dishes).

We can employ the kinematic equation to get the ball's starting velocity:

h = vi * t + 0.5 * a * t^2

where an is the acceleration brought on by gravity (-9.8 m/s2), vi is the initial velocity, t is the time (1.3 s), and h is the window's height (2 m).

Rearranging the equation to solve for vi:

vi = sqrt(2 * a * h / t^2)

Substituting the values:

vi = sqrt(2 * (-9.8) * 2 / 1.3^2)

= sqrt(39.2 / 1.69)

= sqrt(23.18)

= 4.82 m/s

Therefore, the ball's initial velocity is roughly 4.82 m/s.

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Answer:

Option A

Explanation:

Nonverbal communications are ambiguous because some times the face expressions (non verbal signals – Sad face or sitting alone gesture of Alejandro) and the verbal signals (communication between Roark and Alejandro) do not match or contradict each other. Some people prefer to believe on their interpretations of the nonverbal  signals as compared to that of the verbal signals

Hence, option A is correct.

In summary, the observations about determining ages of rocks and fossils are based on scientific principles such as radioactive decay, superposition, and original horizontality.

A scientific principle is a fundamental concept or law that explains how the natural world works. It is a statement based on empirical evidence and repeated observations that is widely accepted by the scientific community as a fundamental truth. Scientific principles provide a framework for understanding and explaining natural phenomena, and they form the basis for scientific research and discovery.

Examples of scientific principles include:

The law of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another.

The theory of evolution, which explains how species change over time through natural selection and genetic variation.

The law of gravity, which explains the attraction between objects with mass and their impact on space-time.

The principle of relativity, which explains how the laws of physics are the same for all observers in uniform motion relative to each other.

Scientific principles are subject to change and refinement as new evidence and discoveries are made, but they provide a reliable foundation for scientific inquiry and understanding.

Here,

1. Observations about determining ages of rocks and fossils:

Scientists use a variety of methods to determine the ages of rocks and fossils, such as radiometric dating, relative dating, and stratigraphy.

Radiometric dating involves measuring the decay of radioactive isotopes in rocks or fossils, which provides an estimate of the time elapsed since the material was last heated or exposed to sunlight.

Relative dating involves comparing the ages of rocks or fossils based on their position in relation to one another.

Stratigraphy involves studying the layers of rock or sedimentary deposits to determine the relative ages of the materials.

2. Explanation based on scientific principles:

Radiometric dating is based on the principle of radioactive decay, which is the spontaneous breakdown of atomic nuclei into smaller particles over time. The rate of decay is constant, which allows scientists to use the amount of remaining radioactive material to estimate the time elapsed since the material was last heated or exposed to sunlight.

Relative dating is based on the principle of superposition, which states that the oldest rocks or fossils are found at the bottom of a sequence, while the youngest rocks or fossils are found at the top. By comparing the ages of rocks or fossils in different layers, scientists can determine their relative ages.

Stratigraphy is based on the principle of original horizontality, which states that sedimentary layers are deposited in horizontal layers. By studying the layers of rock or sedimentary deposits, scientists can determine the relative ages of the materials based on their position.

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Because they last for a very long time, they become unstable and then either slip back into to the sun and erupt into space.

Solar flares are abrupt outbursts that are among the most violent phenomena to occur on the Sun's surface.Flares can unleash energies equal than millions of thermonuclear weapons and normally endure for a few minutes.

The moment the filament size starts to diminish as seen in H pictures is when we designate the filaments eruption start time.This study reports 33 eruptive filament episodes, of which 73% are connected with CMEs and 76% with solar flares.

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Answer:

about 2s or 3s,

Explanation:

15 m/s - 9.8 m/s = 5.2 m/s (1 sec)

5.2 m/s - 9.8 m/s = -4.6 m/s (2 sec)

Answer:

C. gravitational

Explanation:

Answer:

c

Explanation:

edge

The tungsten filament in an incandescent bulb does indeed get very hot, even though it's not as hot as the sun's surface.

Incandescent light bulbs work by passing an electric current through a tungsten filament, which heats up and produces light. The filament is designed to resist melting even at very high temperatures, and it can reach temperatures of around 3020 K (2747 °C or 4986 °F) when the bulb is turned on.

To put that temperature in perspective, the surface temperature of the sun is around 5778 K (5505 °C or 9941 °F), so the tungsten filament in an incandescent bulb does indeed get very hot, even though it's not as hot as the sun's surface.

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Answer:

 #_electrons = 2 10¹⁰ electrons

Explanation:

For this exercise we can use a direct rule of three proportions rule. If an electron has a charge of 1.6 10⁻¹⁹ C how many electrons have a charge of 3.2 10⁻⁹ C

          #_electrons = 3.2 10⁻⁹ ( \(\frac{1}{1.6 \ 10^{-19}}\))

          #_electrons = 2 10¹⁰ electrons

According to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

It is a professional who diagnoses and is responsible for collecting facts about the behaviors and experiences of living beings, organizing them in a systematic way and developing theories for their understanding.

This means that psychologists analyze the behavior of living beings from a scientific approach and these studies allow us to explain their behavior.

Therefore, we can conclude that according to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

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Answer:

The answer is the fourth option

Explanation:

For everyone on edg3, it is D) suggest why a behavior occurs.

The number of significant figures in the calculation for the perimeter should match the least number of significant figures among the measurements, which is 2. Therefore, the calculation for the perimeter should be reported with 2 significant figures.

When performing calculations, it is important to consider the rules of significant figures. The rule states that the result of a calculation should be rounded to match the least number of significant figures in the given measurements.

In the given measurements, the least number of significant figures is 2, which is found in Side 3 (2.000 m). Therefore, when calculating the perimeter of the seven-sided figure, the result should be rounded to 2 significant figures.

For example, if the calculated perimeter is 41.756 meters, it should be rounded to 42 meters since 2 is the least number of significant figures. This ensures that the result aligns with the precision of the measurements provided.

By adhering to the rules of significant figures, we can maintain consistency and accuracy in our calculations and ensure that the level of precision is appropriate for the given data.

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The steady rate of heat transfer through the glass window is 120 watts, and the temperature of its inner surface is 6°C.

To determine the steady rate of heat transfer through the glass window and the temperature of its inner surface, we can use the formula for heat transfer:

Q = (k * A * ΔT) / d

Where:

Q is the rate of heat transfer (in watts)

k is the thermal conductivity of the glass (in W/m°C)

A is the surface area of the window (in square meters)

ΔT is the temperature difference between the inside and outside (in °C)

d is the thickness of the glass (in meters)

Given:

Height and width of the window, A = 1 m x 1 m = 1 m²

Thickness of the glass, d = 8 mm = 0.008 m

Thermal conductivity of the glass, k = 0.64 W/m°C

Temperature difference, ΔT = (20°C - 5°C) = 15°C

Convection heat transfer coefficient, h = 20 W/m²°C

First, we calculate the rate of heat transfer Q:

Q = (k * A * ΔT) / d

Q = (0.64 W/m°C * 1 m² * 15°C) / 0.008 m

Q = 120 W

Therefore, the steady rate of heat transfer through the glass window is 120 watts.

Next, to determine the temperature of the inner surface, we can use the formula for convection heat transfer:

Q = h * A * ΔT_s

Where:

ΔT_s is the temperature difference between the surface and the indoor air.

Rearranging the formula, we can solve for ΔT_s:

ΔT_s = Q / (h * A)

ΔT_s = 120 W / (20 W/m²°C * 1 m²)

ΔT_s = 6°C

Therefore, the temperature of the inner surface of the glass window is 6°C.

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In the chemical reaction described in the passage, the product is Ammonia (NH₃)

A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.

Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).

The given chemical reaction of  chemical factories  is:

H₂ + N₂ → NH₃

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Answer: As the magnetic field from a magnet is present everywhere, correct answer is D

Explanation:

the magnetic field from the magnet is present everywhere so it magnetizes the whole block rather than just a part of the block. given that the block can be magnetized.

Answer:

A. 0.5m/s².

B. –0.5m/s².

C. –0.5m/s².

D. 100m.

Explanation:

A. Determination of the acceleration in the first 20s.

Initial velocity (u) = 0

Final Velocity (v) = 10m/s

Time (t) = 20secs.

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (10 – 0)/20 = 10/20

a = 0.5m/s²

Therefore, the acceleration of the cyclist in the first 20secs is 0.5m/s²

B. Determination of the acceleration between 20 and 30s. This can be obtained as follow:

Initial velocity (u) = 10m/s

Final Velocity (v) = 5m/s

Time (t) = 30 – 20 = 10s

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (5 – 10)/10 = –5/10

a = –0.5m/s²

Therefore, the acceleration of the cyclist between the 20 and 30secs is

–0.5m/s².

C. Determination of the acceleration in the last 10s.

Initial velocity (u) = 5m/s

Final Velocity (v) = 0

Time (t) = 10s

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (0 – 5)/10 = –5/10

a = –0.5m/s²

Therefore, the acceleration of the cyclist between the last 10secs is

–0.5m/s².

D. Determination of the distance travelled by the cyclist when he was moving at a constant speed.

Velocity (v) = 5m/s

Time (t) = 50 – 30 = 20secs

Displacement (d) =?

Velocity = Displacement /Time

v = d/t

5 = d/20

Cross multiply

d = 5 x 20

d = 100m

Therefore, the distance travelled by the cyclist at constant speed is 100m

Answer:

you would do multiplication, d=rt. (distance=d rate=r time=t).

Explanation:

You already have all the variables figure out so just plug in the numbers.

For an easier equation you would just do .6*45=27, the 27 is the total kilometers in 45 minutes.

The spring constant in a situation where a mass of 0.2 kg is attached to a spring of negligible mass, and the mass executes simple harmonic motion with a period of 0.5 s is 62.8 N/m.

What is simple harmonic motion?

Simple harmonic motion (SHM) is a type of motion in which an object oscillates (vibrates) back and forth over the same path over time. A mass on a spring is a basic example of an object that undergoes simple harmonic motion. T

What is the Spring constant?

The spring constant, also known as the force constant, is the ratio of the force exerted on an object to the displacement caused by the force. The spring constant is a measure of the stiffness of a spring or how difficult it is to stretch or compress it. The spring constant is represented by k, and it has units of newtons per meter (N/m).

Calculating spring constant:

Given in the question: mass, m = 0.2 kg, the period T = 0.5 s

We know that the formula for the period of the simple harmonic motion is:

T = 2π √(m/k)T² = 4π²(m/k)k = 4π²m/T²

Substituting the given values in the above equation,k = 4π² × 0.2 / 0.5²= 62.8 N/m

Therefore, the spring constant in a situation where a mass of 0.2 kg is attached to a spring of negligible mass, and the mass executes simple harmonic motion with a period of 0.5 s is 62.8 N/m.

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Firstly, we can write the equation for the electric force. It is:

By applying our values we get

Now, if we remind ourselves of Newton's law, we know that

We know the mass, and we know the Force, so we can find out the acceleration, this gives us:

Thus

Our final acceleration is 0.122 m/s^2

first. this is only worth 38 points second it's B

Answer:

Explanation:

Variable 1 is distance and it is Independent.
Variable 2 is charge and it is Independent.
Variable 3 is force and it is Dependent.

a. To increase force, you need to change distance and/or charge.
b. To increase the force, you need to decrease the distance between the charges and/or increase the magnitude of the charges.

a. To decrease force, you need to change distance and/or charge.
b. To decrease the force, you need to increase the distance between the charges and/or decrease the magnitude of the charges.

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