Explain what happens to the particles in a substance during a physical change.

Final answer:

To find the density of syrup added to a container, we subtract the empty container's mass from the total mass to get the syrup's mass, convert the pint volume to mL, and divide the mass by the volume, resulting in a syrup density of 1.42 g/mL.

Explanation:

The question involves determining the density of syrup by first finding the mass of the syrup alone and then using its volume in pints. The mass of the empty container is given as 115.25 g, and the total mass of the container with syrup is 182.48 g.

To find the mass of the syrup alone, we subtract the mass of the container from the total mass, which gives us 67.23 g of syrup. To convert 0.100 pint to milliliters (mL), we use the conversion rate (1 pint = 473.176 mL), resulting in 47.3176 mL of syrup. Density is mass divided by volume, hence we divide 67.23 g by 47.3176 mL to get the density of the syrup.

Density calculation:

Therefore, the density of the syrup is 1.42 g/mL.

Answer:

Metal : silver

Explanation:

It is given that,

Mass of the metal, m = 0.5 kg

Temperature, [tex]\Delta T=1\ ^0\ K[/tex]    

Heat, Q = 115 J

Heat absorbed is given by :

[tex]Q=mc\Delta T[/tex]

[tex]c=\dfrac{Q}{m\Delta T}[/tex]

Where,

c is the specific heat of the metal

[tex]c=\dfrac{115\ J}{0.5\times 1\ ^0K}[/tex]

[tex]c=230\ J/kg\ ^0K[/tex]

The metal having specific heat equals 230 J/kg °K is silver

Hence, this is the required solution.

Answer:  

Light from star would take 100 years to reach the Earth.

Explanation:

1 light year can be defined as the distance which light travels in one year in space.

1 light year = speed of light × 1 year

1 light year = 9.46 × 10¹⁵ m

A star at a distance of 1 light year means that observer on earth would see the first light from the star after 1 year.

If a star is located 100 light years from the Earth, the light from the star will reach the Earth in 100 years.

The velocity of car 2 from the frame of reference of car 1 will be 10 mph.

The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.

The given data in the problem is

The velocity of car 1, V₁ = 20 mph south

The velocity of car 2, V₂ = 30 mph north

From the frame of reference of car 1, the velocity of car 2 will be V₁₂

From the frame of reference of car 1, the velocity of car 2 will be;

V₁₂=V₂ - V₁

V₁₂= 30 mph - 20 mph

V₁₂= 10 mph

Hence, the velocity of car 2 from the frame of reference of car 1 will be 10 mph.

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An electron is a negatively charged particle found outside the nucleus of an atom, responsible for the electrical properties and chemical behavior of atoms. Electrons orbit around the nucleus in specific energy levels or shells and carry electrical current.

An electron is a negatively charged particle that is found outside the nucleus of an atom. It is one of the fundamental particles that make up an atom and carries a unit negative charge.

Unlike protons that are found in the nucleus and carry a positive charge, electrons orbit around the nucleus in specific energy levels or shells. These negatively charged particles are responsible for the electrical properties and chemical behavior of atoms.

For example, in electrical circuits, when electrons flow through a conductor, they carry electrical current. However, it is important to note that despite being negatively charged, electrons do not carry positive charge like a proton.

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An electron is best characterized by the following description A. Negatively charged particle outside the nucleus of an atom.

To explain further, an electron is a subatomic particle with a negative charge that resides in the electron orbital, which is outside the nucleus of an atom. It carries the smallest unit of negative charge, denoted by a charge of -1.

Electrons are fundamental components of atoms and play a crucial role in chemical reactions and the flow of electricity.

Final answer:

Margret traveled 50 miles to her appointment. To determine this, an equation using the relationship between time, distance, and speed was solved, taking into account that her return trip took 1/4 hour longer due to heavy traffic.

Explanation:

To solve this problem, we need to set up an equation using the concept of time, distance, and speed. Let d represent the distance to the appointment. The time taken to get to the appointment is d/50 hours, and the time taken to come back is d/40 hours. We are given that the return trip took (1/4) hours longer, which can be written as:

d/40 = d/50 + 1/4

To find the distance d, we solve this equation. Clear the fractions by multiplying everything by a common denominator, which is 200 in this case, to get:

5d = 4d + 50

This simplifies to d = 50 miles. Therefore, the distance Margret traveled to her appointment was 50 miles.

This problem is a classic example of using algebra to solve for a variable in a scenario involving average speed, and it emphasizes understanding the relationship between speed, distance, and time.

Answer:

Force=35 N

Explanation:

Given data

mass m=10.0 kg

Gravitational field E=3.50 N/kg

To find

Force

Solution

From definition of gravitational field intensity.

[tex]E_{gravitational-field }=\frac{Force}{mass}\\ E=F/m\\F=mE\\F=(10.0 kg)*(3.50 N/kg)\\F=35N[/tex]

m₁ = mass of sample of copper = m₂ = mass of sample of aluminum = 5 g

T = initial temperature of copper = initial temperature of aluminum

T₁ = final temperature of copper

T₂ = final temperature of aluminum

c₁ = specific heat of copper = 0.09 cal/g°C

c₂ = specific heat of aluminum = 0.22 cal/g°C

Since both receive same amount of heat, hence

Q₁ = Q₂

m₁ c₁ (T₁ - T) = m₂ c₂ (T₂ - T)

(5) (0.09) (T₁ - T) = (5) (0.22) (T₂ - T)

T₁ - T = (2.44)  (T₂ - T)

Change in temperature of copper = (2.44) change in temperature of aluminum

hence the correct choice is

c. The copper will get hotter than the aluminum.

Answer: c. The copper will get hotter than the aluminum.

Explanation: Specific heat capacity of a substance is the amount of heat required to raise the temperature of 1 gram of water through [tex]1^0C[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T[/tex]

m= mass

c = specific heat

[tex]\Delta T[/tex] = change in temperature

Given : [tex]Q_{Cu}=Q_{Al}[/tex]

mass of copper = mass of Aluminium= 5 g

[tex]c_{Cu}\times \Delta T_{Cu}=c_{Al}\times \Delta T_{Al}[/tex]      

Now put all the given values ,  we get

[tex]0.09\times \Delta T_{Cu}=0.22\times \Delta T_{Al}[/tex]

Thus as specific heat capacity of copper is less, the temperature change will be more as they both are at same initial temperature.

Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are given then the correct sequence in the formation of solar winds would be 3 ⇒2⇒4⇒1.

The energy transferred from the Sun in the form of electromagnetic radiation is known as the solar energy

It can be used as thermal energy for various life purposes as well as for electricity conversion with the help of solar photovoltaic cells,

As given in the problem Carrie is making a presentation on solar winds. Her notes of the steps that must occur for solar winds to form are below

1. The stream of electrically charged particles collides with gas atoms, causing the latter to give off light.

2. The electrically charged particles flow outward in all directions as far as Saturn.

3. The stream of electrically charged particles flows outward from the corona.

4. The particles of the solar wind flow along lines of the magnetic field.

Thus, the correct sequence in the formation of solar winds would be 3 ⇒2⇒4⇒1.

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Answer: This process absorbs energy.

Explanation:

There are two ways in which electrons can transition between energy levels:

Absorption spectra: This type of spectra is seen when an electron jumps from lower energy level to higher energy level. In this process, energy is absorbed.

Emission spectra: This type of spectra is seen when an electron jumps from higher energy level to lower energy level. In this process, energy is released in the form of photons.

So, when electron jumps from lower to higher energy level, it absorbs energy.

it becomes a magnet.

Explanation:

According to Newton's second law of motion, the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Mathematically,    Force = mass × acceleration

or,                         Acceleration = [tex]\frac{Force}{mass}[/tex]

Thus, we can conclude that in order to accelerate an object, force must be applied. The object will accelerate in the direction in which force is applied.

In order for an object to accelerate, a net force must be applied to it. The net force determines the resulting acceleration of the object. The net force may come from various sources.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass

F = m × a,

If an object experiences a net force, it will undergo acceleration in the direction of the net force. Acceleration is the rate of change of velocity, so the object will either speed up, slow down or change direction.

The net force required to accelerate an object may come from various sources, such as applied forces, gravitational forces, frictional forces, or any other force acting on the object. The net force determines the resulting acceleration of the object.

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correct answer is a because that was the coreect answer on e2020

Answer:

New force, F' = 2.33 N

Explanation:

It is given that,

A physicist found that a force of 0.72 N was measured between two charged sphere.

The distance between the spheres was, d = 0.9 m

We have to find the force between the two sphere when the distance was decreased to d' = 0.5 m

The force acting between two charged particles is given by :

[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]

i.e. F is inversely proportional to the square of distance between the charges. Let F' is the force when distance is decreased.

So, [tex]\dfrac{F}{F'}=(\dfrac{d'}{d})^2[/tex]

[tex]\dfrac{0.72}{F'}=(\dfrac{0.5}{0.9})^2[/tex]

On solving, we get : F' = 2.33 N

Hence, on decreasing distance the force between the charges increases.

The incorrect statement about seasons is A. Earth's proximity to the Sun does not cause the seasons; it is the tilt of Earth's axis that causes seasons. The question's primary focus is on dispelling the misconception that Earth's distance from the Sun determines seasonal changes.

The statement that is not true of the seasons is A. The Earth is closer to the sun during the summer and farther away from the sun during the winter. In fact, the Earth's distance from the Sun varies only by about 3%, which is not significant enough to cause the seasons. Moreover, during the Northern Hemisphere's winter in December, Earth is actually closest to the Sun. The seasons are instead caused by the Earth's 23.5-degree tilt on its axis, leading to varying angles and durations of sunlight exposure for different parts of the world as the Earth orbits the Sun.

The tilt causes one hemisphere to be more directly exposed to the Sun's rays, making it summer there, while the other hemisphere receives less direct sunlight and thus experiences winter. This is why the Southern and Northern Hemispheres have opposite seasons. Additionally, summer does not start on the same day in every country, and during the summer, days are indeed longer due to the tilt of the Earth.

By definition, we have that the displacement of the object is given by:

[tex] r = \int\limits^t_0 {v} \, dt [/tex]

Where,

v: object velocity

dt: time differential

Therefore, since the integral of a function is the area under the curve of the function, then in a graph of velocity vs time, we have that the displacement is:

The area under the curve of the velocity vs. time graph.

Answer:

to calculate the displacement of the object we have to calculate:

The area under the curve of the velocity vs. time graph.