A car covers 72 kilometers in the first hour of its journey. In the next hour, it covers 90 kilometers. What is the amount of work done by the car? The total mass of the car, including its passengers, is 2. 5 Ă— 103 kilograms. A. 2. 8 Ă— 105 joules B. 4. 0 Ă— 105 joules C. 5. 1 Ă— 105 joules D. 2. 8 Ă— 106 joules E. 2. 8 Ă— 107 joules.

Answer:

The reading will be the same.

Explanation:

Mass does not depend upon anything and it remains the same anywhere. What changes is the weight of the body because it depends upon gravity and is different at different places.

Giving me the brainest will be helpful.

The reading on the scale during free-fall will be the same. reading on the scale is independent of the external environment.

A weighing scale known as a balance is a device used to quantify weight or mass. The classic scale is made up of two plates or bowls that are suspended at equal distances from a fulcrum.

A person with a mass of 70kg is standing on a scale in an elevator suddenly the cable snaps, The reading on the scale during free-fall will be the same as the initial elevator condition.

Hence the reading on the scale during free-fall will be the same. reading on the scale is independent of the external environment.

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a) y(t) = te⁻³ᵗ is a possible position function.

b) General equation: y(t) = C₁e^(-2t) + C₂e^(-3t) + t(e^(-3t))(At + B).

c) Exact motion equation: y(t) = (23/5)e^(-2t) - (8/5)e^(-3t) + t(e^(-3t))(At + B), with initial conditions y(0) = 3 and v(0) = -7.

a) To show that y(t) = te⁻³ᵗ is a possible position function, we substitute it into the differential equation:

y(t) = te⁻³ᵗ

y'(t) = e⁻³ᵗ - 3te⁻³ᵗ

y''(t) = -6e⁻³ᵗ + 9te⁻³ᵗ

Substituting these expressions into the differential equation, we have:

-6e⁻³ᵗ + 9te⁻³ᵗ + 7(e⁻³ᵗ - 3te⁻³ᵗ) + 6(te⁻³ᵗ) = -6te⁻³ᵗ - e³ᵗ

Simplifying this equation, we find that both sides are equal, thus confirming that y(t) = te⁻³ᵗ is a possible position function.

b) The general equation for all possible position functions can be written as:

y(t) = C₁e^(-2t) + C₂e^(-3t) + t(e^(-3t))(At + B)

c) Given the initial conditions y(0) = 3 and y'(0) = v(0) = -7, we substitute these values into the general equation and solve for the constants:

3 = C₁ + C₂

-7 = -2C₁ - 3C₂

Solving these equations, we find C₁ = 23/5 and C₂ = -8/5.

The exact motion equation for the weight is:

y(t) = (23/5)e⁻²ᵗ - (8/5)e⁻³ᵗ + t(e⁻³ᵗ)(At + B)

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Suppose a weight of 1 kg is attached to an oscillating spring with friction constant b = 7 and stiffness constant k = 6. Suppose the external forces on the weight are: Fₑₓₜ(t) = - 6te⁻³ᵗ - e³ᵗ

y" + 7y' + 6y = - 6te⁻³ᵗ - e³ᵗ

a) Show y(t) = te⁻³ᵗ is a possible position function for this weight.

b) Find a general equation for all possible position functions.

c) Find the exact motion equation for this weight if its initial position is y(0) = 3, and its initial velocity is v(0) = y'(0) = -7.

Answer:

most likely D

Explanation:

Distance from the surface to the center of the planet is inversely proportional to your weight or force due to gravity on a planet's surface.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The gravitational constant, denoted by the capital letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity.

f = Gmm/r²

Distance from the surface to the center of the planet is inversely proportional to your weight or force due to gravity on a planet's surface.

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Answer: friction has no role to play in this case. because friction usually occurs between to parts which come in contacts. examples (a)our joints in the human body (b)two mechanical parts (shafts).

Explanation:

However what this topic relates to is gravity. The pebble and paper both weigh one gram, but have different density this is the sole reason why if both are drop from same height the pebble would reach the ground faster than the paper because it is more denser. unlike the paper with a lesser density which would take a longer time to reach the ground.

The time taken for the mass to reach the bottom of the inclined plane after it is released from rest is 0.78 s.

The height of the inclined plane is calculated as follows;

h = L(sin 37)

where;

h = 5 x sin(37)

h = 3.01 m

t = √(2h/g)

t = √(2 x 3.01 / 9.8)

t = 0.78 s

Thus, the time taken for the mass to reach the bottom of the inclined plane after it is released from rest is 0.78 s.

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Answer:

Generally, magnets are attracted to objects that are made of the metals iron, nickel, or cobalt. These materials are called ferromagnetic materials. ... When all or most of the domains are aligned in the same direction, the whole object becomes magnetized in that direction and becomes a magnet.

Explanation:

In order to determine the number of particles of methane, use the following expression:

number of particles = (mass /molar mass ) x Avogadro's number

in this case, you have:

molar mass = 16.03 grams/mole

mass = 120 grams

Avogadro's number = 6.02*10²³ particles/mol

replace the previos values of the parameters into the formula for the number of particles:

number of particles=(120 grams/ 16.03 grams/ mol)x(6.02*10²³particles/mol)

= (7.46 mol) x (6.02*10²³ particles/mol)

= 4.50*10²⁴ particles

Hence, the number of particles of methane, in 120 grams, is 4.50*10²⁴

Increasing marginal cost is a direct result of diminishing marginal returns is true statement.

As production of a good increases, the cost of each additional unit increases due to resource constraints, diminishing returns of production, and the need to hire more specialized labor.

Tesla is building a car battery factory in Nevada to drastically increase their production capacity from where it is now. Since the factory has not opened, Tesla is increasing its production possibility frontier by improving their production capabilities.

As a larger number of students are assigned to groups to work on a project, the less each additional student will contribute to the project due to a diminishing marginal return of labor.

A firm may produce chairs or tables. If the firm is using all of its resources to produce tables and a new technology makes it easier to produce chairs, but the firm continues to produce only tables, the firm is still technically efficient, but the marginal cost of tables increases due to diminishing marginal returns.

The measure which most accurately measures the well-being of society is Real GDP per capita, which measures the total output of goods and services of a country adjusted for population size.

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The symbol for an atom with ten electrons, ten protons, and twelve neutrons is 22Ne. This is because the atom has 10 protons, which identifies it as a neon element (Ne).

The atomic mass is the sum of protons and neutrons (10+12), which equals 22. Therefore, the symbol is 22Ne.

The symbol for an atom with ten electrons, ten protons, and twelve neutrons is 22Ne.The other two symbols you provided, 32Mg and 32Ne, correspond to atoms with 12 protons and 20 neutrons (magnesium-32) and 10 protons and 22 neutrons (neon-32), respectively.

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The net force acting on the airplane is 25N.

Forces acting on the paper airplane when it is in the air:

Given.

Weight of the paper airplane, F1 = 16N

The force of air resistance, F2 = 9N

Net force = F1 + F2

Net force = 25N

Thus, the net force acting on the airplane is 25N.

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According to the question the speed of pulse is = 0.33m/s

Velocity is the pace and direction of either an object's movement, whereas speed is now the time rate which an object is travelling along a path. In other words, velocity is a vector, whereas speed would be a scalar value. If you determine how far an object travels in a certain amount of time, you can calculate its speed.For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour .

The equation for speed can be obtained by simply dividing time by distance.

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From the calculations and the free body diagram, the net force that acts on the body is 34.5 N

The net force refers to the force that is acting on a body. Let us note that the gravitational force and the normal force cancel out each other. Thus the two force that act on the body are the applied force and the frictional force.

Thus;

The  net force that acts on the body is;

40.2 N - 5.7 N = 34.5 N

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Answer:

Ethical Guidelines for Research With Human Subjects

Participation Must Be Voluntary.

Researchers Must Obtain Informed Consent.

Researchers Must Maintain Participant Confidentiality

Explanation:

Basta Yun na yan correct me if I'm wrong hehehhe

Thick wires allow for easier flow of current compared to thin wires of the same material when connected to the same source.

Current flow is determined by the resistance offered by the wire. Thicker wires have a lower resistance due to their larger cross-sectional area, allowing for the passage of more electrons and facilitating the flow of current. In contrast, thin wires have a smaller cross-sectional area, resulting in higher resistance and hindering the flow of current.

Resistance is governed by Ohm's Law, which states that resistance is directly proportional to the length of the wire and inversely proportional to its cross-sectional area. A thicker wire has a larger cross-sectional area, reducing resistance and allowing more current to flow.

Additionally, the resistance of a wire also depends on the resistivity of the material it is made of, but since the question assumes the same material, the focus is on the wire's thickness.

In practical applications, using thick wires for high-current circuits or power transmission is essential to minimize energy loss and prevent overheating. Thick wires can handle larger currents without significant voltage drops, ensuring efficient and reliable electrical systems.

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Answer: A) and D)

Explanation:

Answer:

6m/s

Explanation:

a = (v-u)/t

acceleration, a

initial velocity, u

final velocity, v

time, t

substitute values and you'll get the answer

Answer:

6 m/s

Explanation:

ANSWER:

(a) 108 J

(b) 0 J

(c) 108 J

STEP-BY-STEP EXPLANATION:

(a)

Express the relation between horizontal component of work done and force on the crate:

Here Wh is the horizontal component of the work done on the crate and Fh is the horizontal component of force and d is the distance of the crate across the floor.

Replacing:

(b)

Express the relation between vertical component of work done and force on the crate:

Here Wv is the vertical component of the work done on the crate and Fv is the vertical component of force and d is the distance of the crate across the floor.

Replacing:

(c)

Express the relation for total work done by the 45 N force:

The inventor's claim of a heat pump delivering 8 kW heat to a room at 30°C from the ambient environment at -10 °C by consuming just 1 kW electricity is most likely Impossible.

Based on the laws of thermodynamics, it is highly improbable for a heat pump to achieve a coefficient of performance (COP) greater than 1, meaning it produces more heat output than the electrical energy input. The COP of a heat pump is defined as the ratio of heat output to the electrical energy input. In this case, the claimed COP would be 8, which is unrealistic.

In practice, heat pumps typically have COP values ranging from 2 to 6, depending on various factors such as design, operating conditions, and working fluids. Achieving a COP of 8 would require an exceptionally efficient and ideal heat pump, which is highly unlikely.

Therefore, the inventor's claim is most likely Impossible unless they have developed a groundbreaking technology that defies the known principles of thermodynamics.

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During time interval t2, the voltage is decreasing from the maximum value to 0, as the magnetic flux linkage with the coil is reduced.

When an isolated magnetic North pole is discovered and dropped through the set-up (magnet through a coil experiment), there is a change in magnetic flux linkage within the coil. Therefore, the induced electromotive force (EMF) will cause a voltage pattern to form.The Faraday's Law of Electromagnetic Induction states that when there is a change in magnetic flux linkage within a coil, an EMF is induced in the coil.

In this scenario, the magnetic flux linkage increases as the magnetic North pole enters the coil and decreases when it exits the coil, which will result in a change in the direction of the induced EMF within the coil.The voltage pattern obtained from the experiment depends on the rate at which the magnetic North pole is dropped through the set-up and the number of turns of the coil.

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The force of the swing is 8.33 N.

The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Given that:  fluid resistance of the wind = 8.19 N.

The golf ball with a mass of 0.045 kg accelerates 3.01 m/s^2 through the fluid resistance of the wind.

Let  the force of the swing is F.

Now, from Newton's 2nd law of motion:

ΣF = ma

⇒ F - 8.19 = 0.045×3.01

⇒ F = 8.33 N.

Hence,  the force of the swing is 8.33 N.

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Answer:

9] V = \(\frac{D}{T} \)

Take any distance value from the graph and its relevant time.

V = \(\frac{8}{4} \)

V = 2 m/s

[You will notice that any distance values with its time will give you 2 m/s as its speed. This means that speed is constant throughout.]

10] Take the distance value and its time for the highest peak of B.

V = \(\frac{20}{2} \)

V = 10 m/s

Answer:

From Ohms Law

V=IR

V=5volts

R=33.0hms

I=V/R

I= 5/330

=0.0152A

The current flowing through the cross-section of the resistor is 0.0152A.

Given the data in the question;

Ohm's law states that "the current flowing through the cross-section of a conductor is directly proportional to the voltage across it".

It is expressed as;

\(V = IR\)

Where V is voltage, I is current and R is the Resistance.

To determine the current flowing through the resistor, we substitute our given values into the expression above.

\(V = IR\\\\I = \frac{V}{R}\\ \\I = \frac{5.00V}{330\ Ohm} \\\\I = 0.0152A\)

Therefore, the current flowing through the cross-section of the resistor is 0.0152A.

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Sue provided 40 watts of power to complete the work in 6 seconds.

Power is the rate at which work is done, or the amount of work done per unit time. It is a measure of how quickly energy is transferred or transformed from one form to another. Since Sue completed the work in 6 seconds, we can calculate her power using the formula,

Power = Work / Time

From question #1, we know that the work done by Sue was 240 J. And the time taken to complete the work was 6 seconds. Substituting these values in the above formula,

Power = Work / Time

Power = 240 J / 6 s

Power = 40 watts

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The sun's mass plays a crucial role in shaping the characteristics of planets in a solar system. It determines the orbital paths, stability, and overall structure of planetary systems.

During the three terrain-forming trials, I observed the effects of the sun's mass on planets in a solar system. The sun's mass is a critical factor in determining the gravitational forces experienced by planets. Through these trials, I recorded data that supported several conclusions

Firstly, I observed that the sun's mass directly influences the orbital paths of planets. Planets closer to the sun experience stronger gravitational forces, leading to faster orbital speeds and shorter orbital periods. In contrast, planets farther from the sun have slower orbital speeds and longer orbital periods. This data confirms Kepler's laws of planetary motion, which state that the square of a planet's orbital period is directly proportional to the cube of its average distance from the sun.

Secondly, the sun's mass affects the stability of planetary systems. A more massive sun exerts stronger gravitational forces, providing stability by preventing planets from being pulled out of their orbits. The recorded data revealed that planets in systems with a less massive sun tended to have unstable orbits, resulting in irregular paths and potential ejections from the system.

Lastly, the sun's mass influences the overall structure of planetary systems. Higher-mass stars tend to form larger and more massive planets, as the gravitational forces they exert allow for the accumulation of larger amounts of planetary material. The data collected during the trials supported this conclusion, demonstrating a correlation between the mass of the sun and the sizes and masses of the planets in the system.

The recorded data from the terrain-forming trials provided empirical evidence supporting these conclusions, highlighting the significant impact of the sun's mass on the planets it governs.

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By applying the relationship of side lengths to interior angles in a triangle, a possible measure of line segment TS is 4.0 ft.

In Geometry, the relationship of side lengths to interior angles in a triangle include the following:

Based on the above theory, we can logically deduce that angle GF < TS or TS > GF because 42° is greater than 56°.

TS > 3.2 ft.

Therefore, a possible measure of line segment TS is 4.0 ft.

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Complete Question:

In the triangles, TR = GE and SR = FE. If Line segment G F = 3.2 ft, which is a possible measure of Line segment TS? 1.6 ft 3.0 ft 3.2 ft 4.0 ft.

1,013.75 kg/m3 is what's found to be the mixture's density.

Per unit of length, area, or volume, there is a certain amount of something: as. : celebration of an object per unit volume.

A polystyrene cup can float in water whereas a ceramic cup will fall due to the difference in density between the two materials. Due to its lower density than water, wood typically floats on the surface of liquids. Generally speaking, rocks sink because they are denser than water.

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Answer:

gravity

Explanation:

gravity pulls anything with with weight towards the earth.

Answer

The reason why this occurs is because if there is any apparent wind being pushed towards the direction of the door, there will be an attempt of equalizing pressure and thus it will slam, or close very loudly when you even just push it shut with some effort.

Explanation

This has happened to me a variety of times, I would have the garage open, and it would be a little bit windy, and when I tried to close it, it would slam shut.

Airflow is a significant factor in the pressure appliance.

Your question at the end is correct (Differences in air pressure.)

Apologies for the late response, but I was interested in this as well.

To create a standing wave with n=7 in a pipe of 0.50m length and filled with air, we need to use the formula v = nλf, where v is the speed of sound in air, n is the number of nodes, λ is the wavelength, and f is the frequency.

Since the top of the pipe is open and the bottom is closed, we have a node at the bottom and an anti-node at the top.

The wavelength can be calculated using the formula λ = 2L/n, where L is the length of the pipe. Substituting the values, we get λ = 2(0.50m)/7 = 0.14m.

The speed of sound in air at room temperature is approximately 343 m/s. Thus, we can calculate the frequency as follows:

v = nλf
f = v/(nλ)
f = 343/(7*0.14)
f = 347.6 Hz

Therefore, the frequency created by this standing wave with n=7 in a pipe of 0.50m length and filled with air at room temperature is approximately 347.6 Hz.

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