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Directions: Write a T in the blank for True, or an F for False.

6. Newton's First Law states that every action has an equal/opposite reaction.

7. Newton's Second Law can be simplified to F=ma.

8. An object will move in the same direction as the unbalanced force acting upon it.

9. Friction always acts in the same direction as the motion of the object.

10. If there is no next force acting on an object, that means in ALL SITUATIONS that the object will not move.​

Answer:

on

Explanation:

when someone runs their hand is not really balanced when they wrote something

If a  student rolls a ball along the floor so that the ball has a speed of 16 m / s , then the speed of the ball relative to a second student would be 10 m / s if the student is running at 6 m / s in the same direction that the ball is rolling.

The total displacement covered by any object per unit of time is known as velocity.

If a student rolls a ball across the floor at a speed of 16 meters per second, the ball's speed in relation to a second student would be 10 meters per second if the second student is sprinting at a speed of 6 meters per second in the same direction as the ball is rolling.

Thus, the relative speed of the ball with respect to the student would be 10 m / s.

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The density of a material is constant and it is given by the ratio of the mass to the volume of the material

The mass of the liquid and the full bottle ae

The mass of the liquid is 450 g

The mass of the filled bottle is 530 grams

The reason the above values are correct are as follows:

The given parameters are;

Volume of the bottle, V = Half litre

Mass of the bottle, \(m_b\) = 80 g

The volume of liquid in the bottle when filled, V = 500 cm³

The density of the olive oil with which the bottle is filled, ρ = 0.9 g/cm³

a. Required:

To calculate the mass of oil in the bottle

Solution:

The volume of oil in the bottle when the bottle is filled, V = 500 cm³

\(Density, \ \rho = \dfrac{Mass}{Volume} = \dfrac{m}{V}\)

The mass of the liquid, m = ρ × V

∴ m = 0.9 g/cm³ × 500 cm³ = 450 g

The mass of the liquid, m = 450 g

b. The mass of the oil in the bottle, m = grams

The mass of the full bottle, \(m_{filled}\) = m + \(m_b\)

∴ \(m_{filled}\) = 450 g + 80 g = 530 g

The mass of the full bottle, \(m_{filled}\) = 530 grams

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The binding energy of electrons to the metal can be calculated using the equation:

Binding Energy = Planck's constant × speed of light / wavelength of light - Maximum kinetic energy of ejected electrons

First, convert the wavelength from nm to meters: 176 nm = 176 × 10^(-9) meters.

Next, use the equation E = hf to calculate the energy of one photon, where E is the energy, h is Planck's constant (6.626 × 10^(-34) J·s), and f is the frequency of light. Since frequency is the speed of light divided by wavelength, f = c / λ, where c is the speed of light (3.00 × 10^8 m/s) and λ is the wavelength of light.

Substitute the values into the equation and solve for energy.

Finally, subtract the maximum kinetic energy of the ejected electrons from the calculated energy to find the binding energy.

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Hello. You did not present the photos to which the question refers, which makes it impossible for your question to be answered. However, I will try to help you in the best possible way.

Your question informs us that the photos are of a star-forming molecular cloud. The molecular cloud has dust, especially when the star is forming. In this case, we must keep in mind that in photos taken in visible light, the dust is able to appear, especially in space, where this dust would not reflect light, unlike the star in formation. In this case, we can conclude that in the case of the photo taken in visible light, we could see the molecular cloud as a dark spot, due to the dust. However, it would not be possible to view it in a photo taken with infrared light.

It is possible for a body to move at a constant speed and still be in accelerating motion if its direction of motion is changing, i.e., it is undergoing circular motion. In circular motion, the direction of velocity of the body is changing constantly, resulting in a change in its acceleration even though its speed remains constant.

When a car is going around a circular track with constant speed, the centripetal force necessary for circular motion is provided by frictional force between the tires of the car and the surface of the track.

In circular motion, the direction of acceleration is towards the center of the circle, while the direction of net force is also towards the center of the circle. If the speed of an object is changing while rotating in a circular motion, the direction of net force remains towards the center of the circle, but the direction of acceleration may change depending on the direction of change in speed.

In this experiment, if the point on the arm hanging the bob and the pointer are not on the same vertical line, it would result in an error in the measurement of the period of oscillation of the bob. The period of oscillation is directly proportional to the length of the arm, and if the arm is not vertical, the effective length of the arm will change, resulting in an inaccurate measurement of the period.

If there is no spring attached and the bob is rotated at a constant speed, the centripetal force required for circular motion would be provided by the tension in the string. The tension in the string would act towards the center of the circle and provide the necessary force to keep the bob moving in a circular path.

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KE = ½ mv2. Kinetic energy, which may be seen in the movement of an object, particle, or group of particles, is the energy of motion. Any moving item uses kinetic energy, such as a person walking, a baseball being thrown, a piece of food falling from a table, or a charged particle in an electric field.

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The required thermal radiation emitted by the Sun is calculated to be 16 times greater than the radiation.

We know that the energy emitted from the thermal radiation is is proportional to temperature raised to the power 4.

Thermal radiation ∝ T⁴

where,

T is temperature

The energy of the hot sun can be written as σ Thot⁴ = σ(12000)⁴

The energy of the cold sun can be written as σ Tcold⁴ = σ(6000)⁴

The ratio of both the energies is calculated to be,

⇒ σ(12000)⁴/σ(6000)⁴ = 16

Thus, the required energy output of the Sun is 16 times greater.

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Answer:

μ = dynamic viscosity = unknown

ρ = 1000 kg/m^3

k = 0.8 W/m.K

Cp = 4000 J/kg.K

Explanation:

To find the required heat flux, we can use the equation:

Q = m * Cp * (T_out - T_in)

where Q is the heat flux, m is the mass flow rate, Cp is the specific heat capacity, and T_out and T_in are the temperatures at the exit and entrance of the tube, respectively.

Given:

m = 2 x 10^-3 kg/s.m

Cp = 4000 J/kg.K

T_out = 75°C = 75 + 273 = 348 K

T_in = 25°C = 25 + 273 = 298 K

Substituting these values into the equation, we get:

Q = (2 x 10^-3) * 4000 * (348 - 298) = 2.4 W

Therefore, the required heat flux is 2.4 W.

To determine the surface temperature at the tube exit and at a distance of 0.5 m from the entrance, we need to calculate the convective heat transfer coefficient (h) using the following equation:

h = Nu * k / D

where Nu is the Nusselt number and D is the tube diameter.

The Nusselt number can be determined using the following correlation for fully developed flow in a circular tube:

Nu = 0.023 * Re^0.8 * Pr^0.3

where Re is the Reynolds number and Pr is the Prandtl number.

Re = (D * m) / (P * A)

A = π * (D^2 / 4)

Substituting the given values into the equations, we can calculate Re:

D = 12.7 mm = 12.7 x 10^-3 m

P = 1000 kg/m^3

A = π * (12.7 x 10^-3 / 2)^2

Re = (12.7 x 10^-3 * 2 x 10^-3) / (1000 * π * (12.7 x 10^-3 / 2)^2)

Simplifying, we get:

Re ≈ 0.635

Next, we calculate Pr:

Pr = ν / α

ν = μ / ρ

α = k / (ρ * Cp)

Given:

μ = dynamic viscosity = unknown

ρ = 1000 kg/m^3

k = 0.8 W/m.K

Cp = 4000 J/kg.K

We are not given the value of μ, so we cannot calculate Pr accurately.

Therefore, we are unable to determine the convective heat transfer coefficient (h) and, consequently, the surface temperature at the tube exit and at a distance of 0.5 m from the entrance.

The horizontal component of the plane's velocity is 85.96 mph and the vertical component of the plane's velocity is 487.5 mph.

The component form of the velocity of the airplane includes both horizontal and vertical velocity and it is calculated as follows;

Vx = V cosθ

Vy = V sinθ

where;

θ = 170 - 90 = 80⁰

Vx = 495 mph (cos 80)

Vx = 85.96 mph

Vy = 495 mph (sin 80)

Vy = 487.5 mph

Thus, the horizontal component of the plane's velocity is 85.96 mph and the vertical component of the plane's velocity is 487.5 mph.

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Answer:

The nucleus is very small compared to the size of the atom.

The radius of the atom is about 100,000 times the radius of the nucleus

Answer:

A. stronger prevailing winds and more hurricane activity

Explanation:

edg2020

Answer:A

Explanation:

\( \large \bf \implies{s = 200 \: m}\)

Answer:

All cells come from pre-existing cells

Explanation:

Rudolf Virchow, a German Physician, stated the theory that all cells arise from pre-existing cells. He used this theory to explain disease pathology at the cellular level. His work helped clarify that diseases occur not at tissue or organ level, but at the cellular level. This resulted in more accurate diagnosis of diseases by other scientists.

His legacies includes being among the first to use animals in his research, first to name numerous diseases and also the creation of many medical terms still in use today.

Answer:

Explanation:

Given mg = 4N .

m = 4 / g

At the bottom of the swing let centripetal acceleration be a

T - mg = ma

9 - 4 = ma

5 = 4 a  / g

a =  5g / 4

Answer:

14 m/s^2

Explanation:

Use the formula to get the velocities at 2, and 5 seconds.

Then use the average acceleration formula.

Answer:

People who are in good health at the beginning of a hunger strike "are usually at little risk of dying from malnutrition for at least six to eight weeks," the guidelines state. But people who are ill can die from malnutrition in as little as three weeks. Malnutrition during pregnancy can be quite harmful. Maternal malnutrition during pregnancy can affect the wellbeing and development of the baby. Malnutrition is when the baby and in this case, the mother do not receive adequate nourishment during pregnancy. It means the baby, in the mother’s womb does not get enough nutrients to grow.

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If two stars have the exact same spectral class, then they must have similar temperatures, masses, and sizes. The spectral class of a star is determined by its surface temperature, which affects the colors and intensities of the electromagnetic radiation emitted by the star. This information is typically used to classify stars into seven different spectral types: O, B, A, F, G, K, and M, with O being the hottest and M being the coolest.

If a newly discovered stellar object is cooler than an M star, then it is probably a brown dwarf, a type of sub-stellar object that is too small to sustain nuclear fusion in its core. Brown dwarfs are often referred to as "failed stars" since they are too small to become full-fledged stars but too large to be classified as planets. Brown dwarfs emit very little visible light and instead radiate in the infrared part of the spectrum. They can be difficult to detect due to their low luminosity and can be identified using specialized instruments that are sensitive to infrared radiation.

In summary, the spectral class of a star provides information about its temperature, size, and mass, and stars with the same spectral class will have similar properties. A newly discovered stellar object that is cooler than an M star is likely a brown dwarf, a sub-stellar object that emits primarily in the infrared part of the spectrum.

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Electric potential is the amount of electric potential energy per unit charge at a particular point in an electric field.

It is a scalar quantity measured in volts (V). To find the value of charge (q) given the electric potential, we can use the equation:

Electric Potential = Electric Potential Energy / Charge

Rearranging the equation, we have:

Electric Potential Energy = Electric Potential * Charge

The electric potential energy is the work done to bring a charge from infinity to a specific point in the electric field. By knowing the electric potential and rearranging the equation, we can determine the value of the charge (q).

For example, if the electric potential is 10 volts and the electric potential energy is 50 joules, we can substitute these values into the equation:

50 joules = 10 volts * Charge

By rearranging the equation and solving for Charge, we find that the value of the charge (q) is 5 coulombs.

It is important to note that the electric potential is a property of the electric field, while the charge is a property of the particle experiencing the electric field.

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The Law of Reflection held for planar waves due to partial transmission of the wave.

This is a wave which has a constant physical quantity which is perpendicular to the direction of wave travel.

These type of wave has normal wave characteristics such as frequency and is partially transmitted through reflection.

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Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system .

Hope it is helpful to you ☺️

Answer:

Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system.

It is incorrect to say that matter contains heat because heat is a flow of energy not an state function.

Matter is anything that occupies space and have mass, having mass means that it contains energy in itself, this energy is called internal energy.

This internal energy is different from the heat energy, the heat energy is completely different from any of the form of energy.

The heat energy flows continuously, it cannot be contains in any matter, when there is more heat the temperature goes up and when there is low heat, the temperature goes down. It is not a function related to the state the matter. This is why it is incorrect to say that the heat is contained by matter.

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Answer:   3.46 m/s

Explanation:  Change in displacement( Delta x) = 6.6 m/s * 13 s + 0 m/s * 2.7 s+ 4.4 m/s * 4.0s = 85.8m - 17.6m = 68.2 m.

Note : In the cartesian coordinates, we take right side from the origin as positive and left side from the origin as negative. It's just a convention though. When you make graphs for directions it so happens that east is in the right and west in the left.

Now,

Change in time (Delta t) = 13.0 s+ 2.7 s+4.0 s = 19.7s (Note: You cannot have negative time period because time is a scalar quantity meaning that it has only magnitude and no direction.)

Therefore, Man's average velocity (V avg) = Delta x/ Delta t

= 68.2m/ 19.7 s

= 3.46 m/s

Utilitarianism's opponents say that it is a "doctrine worthy only of pigs". Because, they think that human beings have a higher purpose than the maximization of pleasure.

A moral theory known as utilitarianism favours activities that increase happiness or pleasure and disapproves of those that increase sadness or harm. A utilitarian ideology would seek to improve society as a whole when used to guide social, economic, or political decisions.

According to utilitarianism, a decision is morally correct if it makes the most people happy within a community or a group.

A moral theory known as utilitarianism favors activities that increase happiness and disapproves of those that decrease it.

"The greatest amount of benefit for the greatest number of people" is what utilitarianism advocates.

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If its area is 160 km², then this area would be 1.6 ×10⁸ in square meters.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

As given in the problem, one of the smallest nations in the world is Liechtenstein, a tiny country between Switzerland and Austria in Europe. If its area is 160 km.

1 km² = 10⁶ meter²

160  km² =160 × 10⁶ meter²

              =  1.6 ×10⁸ meter²

Thus, this area in square meters would be  1.6 ×10⁸ meter²

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The time interval required to accumulate 1.00 eV of energy is approximately 7.16 × 10¹¹ seconds.

To calculate the time interval required to accumulate 1.00 eV (electron volt) of energy from sunlight with an intensity of 500 W/m² falling on a disk with a radius of 2.82 × 10⁻¹⁵ m, we can use the equation:

Energy = Power * Time

Given:

Intensity (I) = 500 W/m²

Radius (r) = 2.82 × 10⁻¹⁵ m

Energy (E) = 1.00 eV

First, we need to calculate the total power received by the disk. Since the light is completely absorbed, we can assume that all the power is absorbed by the disk. The power can be calculated using the formula:

Power = Intensity * Area

The area of the disk can be calculated as follows:

Area = π * (radius)²

Substituting the values into the equation:

Area = π * (2.82 × 10⁻¹⁵ m)²

Next, we can calculate the power:

Power = Intensity * Area

= 500 W/m² * [π * (2.82 × 10⁻¹⁵ m)²]

Now we can solve for time:

Time = Energy / Power

= (1.00 eV) / [500 W/m² * π * (2.82 × 10⁻¹⁵ m)²]

To convert eV to joules, we use the conversion factor:

1 eV = 1.602 × 10⁻¹⁹ J

Substituting this conversion and the numerical values:

Time = (1.602 × 10⁻¹⁹ J) / [500 W/m² * π * (2.82 × 10⁻¹⁵ m)²]

Therefore, the time interval required to accumulate 1.00 eV of energy is approximately 7.16 × 10¹¹ seconds.

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We may be aware that, for example, a car leaving a stop sign would move farther in a given amount of time the faster it accelerates.

acceleration is the rate of change in both speed of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. So because direction is always shifting, motion on a circle accelerates even while the speed is constant.

An object's velocity is altered by a net force, and acceleration increases with net force. To accelerate at the same rate as less massive objects, more massive objects need greater net forces.

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Answer:

The object's mass is 41.1125 kilograms.

Explanation:

We can use the general density equation to determine the mass.

Density Equation

\(p=\frac{m}{V}\)

\(p\) is the density

\(m\) is the mass

\(V\) is the volume

Lets solve for \(V\).

Multiply both sides of the equation by \(V\).

\(p*V=\frac{m}{V}*V\)

Cancel out the common factor of \(V\) on the right side.

\(pV=m\\m=pV\)

Now we have an equation for mass.

We are given

\(p=3.25\)

\(V=12.65\)

Substituting our values into our equation gives us

\(m=3.25*12.65\\m=41.1125\)

Notice the unit of the given density

\(kg/m\)

Our answer will be in kilograms