Can you give me the reference frame for every one of these please.

The sun rises over the horizon.
A bus moves past people standing on the sidewalk.
A passenger on that same bus sees a ball roll down the aisle.
Two trains traveling at the same speed on parallel tracks race past passengers who are waiting on a local station's platform.
A passenger on one of those trains looks out the window and sees the other train standing still.
A person standing near a railroad track sees a train pass by, then notices an airplane fly overhead in the same direction as the train, but at a much faster speed.
A passenger in that airplane looks down and sees the train moving backward.
A passenger in that airplane looks across the aisle and sees a child tossing a ball up and down.

It is to be noted that the magnitude of the electric flux through the hemisphere surface  is πR²E. (Option D)

The characteristic of an electric field known as electric flux may be thought of as the quantity of electric lines of force (or electric field lines) that cross a certain region.

According to this theory, electric field lines begin with positive electric charges and end with negative charges.

Recall  that the A hemispherical surface (half of a spherical surface) of radius R.

In order to derive the Magnitude of the electric flux we use the following formula:

Ф = ∈ x Area of the Curve Surface

⇒ Ф = ∈ x πR²

⇒ Ф = πR²∈

Thus, option D is the correct answer.

Learn more about Electric Flux:
https://brainly.com/question/14372859
#SPJ1

Full Question:

A hemispherical surface (half of a spherical surface) of radius R is located in a uniform electric field of magnitude E that is parallel to the axis of the hemisphere. What is the magnitude of the electric flux through the hemisphere surface?

A) 2πR²∈

B) 0

C) 4 πR²∈/3

D) πR²∈

Answer:

80%

Explanation:

efficiency = (useful work out / total energy in) x  100

                = \(\frac{80}{100}\)  x 100

                =  80%

Answer:

Pin, rightwards

Explanation:

Answer: I dont understand

Explanation:

The maximal potential energy is present at the highest point, and there is no kinetic energy due to the zero ultimate velocity at the lowest point.

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly depending upon the height of the object.

When the egg is at the highest position, the height is maximum. Therefore, the potential energy is also maximum.

When the egg lands on the ground at the striking point only the kinetic energy exists the potential energy is zero.

According to the law of conservation of energy, total energy is defined as the sum of kinetic energy and potential energy.

Total energy = kinetic energy+potential energy

Also, the energy can not be created nor destroyed and can be transferred from one form to another form.

Hence, at the highest point potential energy is the maximum and the kinetic energy is zero. because the final velocity is zero.

To learn more about the potential energy, refer to the link;

https://brainly.com/question/24284560

#SPJ1

At the highest point,  the maximum potential energy is present. But kinetic energy is not present because of zero velocity at the lowest point.

Potential energy is the energy posses by an object due to its position relative to other objects , which it stresses within itself.

Potential energy depends upon the height of the object. its SI unit is joule.

When egg rises to the maximum height from the ground surface, the potential energy is also maximum.

When the egg falls and lands on the ground , the potential energy will be zero. It posses only kinetic energy.

By the law of conservation of energy ,

The energy is neither be created nor be destroyed and cannot be transferred from one form to another.

Therefore, At the highest point the potential energy is  maximum. But kinetic energy is zero.

To learn more about potential energy visit

https://brainly.com/question/24284560

#SPJ1

Answer:

the one with 2 batteries

Answer:

AB=0.79

Explanation:

hope this helped

Answer:

\(\triangle v=1.57*10^-^3^5miles/hour\)

Explanation:

From the question we are told that

Mass of of automobile M= 1500 kg

Generally the equation of the uncertainty principle is  given by

\(\triangle p=\frac{h}{ \triangle x}\)

\(\triangle p=\frac{1.054*10^-^3^4}{ 10^-^2}\)

\(\triangle p=1.054*10^-^3^2\)

Generally the uncertainty in velocity is mathematically given by

\(\triangle v=\frac{\traingle p}{m}\)

\(\triangle v=\frac{1.054*10^-^3^2}{1500}\)

\(\triangle v=7*10^-^3^6m/s\)

Therefore the minimum uncertainty in the velocity (in miles per hour)

\(\triangle v=7*10^-^3^6*\frac{3600}{1609.3}\)

\(\triangle v=1.57*10^-^3^5miles/hour\)

Answer:

CO2 emissions from fossil fuel burning should be minimized at all cost. The CO2 are gotten when the carbons from hydrocarbons react with air(oxygen). This gas erodes the ozone layer which makes the melting of ice caps faster due to increased amount of heat radiations on the earth. This is the only best and permanent solution to the reduction of the amount of heat rays on the earth which is a global problem.

Objects which reflects back the sunrays could also be inserted into the sea to prevent the melting of the ice caps.

Answer:

Antibiotics can only kill bacterial infections. they cant treat viruses because it's a viral infection that spreads through the body

They can't be used to treat infections caused by the Corona or any virus because antibiotics only kill bacterial infections. They can not treat Corona or any virus because it's a viral infection that spreads through out the body.

Answer:

O 3.27 N

Explanation:

The effort force needed for the auger to drill through the mud can be calculated using the formula:

Effort force = (mud resistance force) / (mechanical advantage)

The mechanical advantage of the auger can be calculated using the formula:

Mechanical advantage = (2 * pi * radius) / pitch

Substituting the given values, we get:

Mechanical advantage = (2 * pi * 7.75 cm) / 6.80 cm = 7.18

Now, we can calculate the effort force as:

Effort force = 23.4 N / 7.18 = 3.26 N

Therefore, the effort force needed for the auger to drill through 23.4 N of mud is approximately 3.26 N.

The closest answer choice to this value is 3.27 N, so the answer is:

O 3.27 N.

Answer:

decrease; direction of the force

Explanation:

The velocity gradient across the 3.7 mm thick oil layer on the flat plate sliding on the horizontal table is 0.594 m/s/m.

Given:

Surface area of the plate (A) = 1.8 m^2

Thickness of the oil layer (h) = 3.7 mm = 0.0037 m

Force applied on the plate (F) = 2.2 N

Dynamic viscosity of the oil (η) = 0.89 x 10^-3 Ns/m^2

To calculate the velocity gradient across the oil layer, we can use the equation:

τ = η * du/dy

where τ is the shear stress, η is the dynamic viscosity, and du/dy is the velocity gradient.

Since the force (F) applied on the plate is responsible for the shear stress, we can write:

τ = F / A

Substituting the given values, we have:

F / A = η * du/dy

Solving for du/dy, we get:

du/dy = (F / A) / η

Substituting the values, we have:

du/dy = (2.2 N) / (1.8 m^2 * 0.89 x 10^-3 Ns/m^2)

du/dy = 0.594 m/s/m

Therefore, the velocity gradient across the oil layer is 0.594 m/s/m.

For more such questions on velocity, click on:

https://brainly.com/question/5181841

#SPJ8

Potatoes mostly consist of starch, a complex carbohydrate produced by plants as a means of storing energy.

As starch accounts for the majority of potatoes' calories, they are categorised as a carbohydrate vegetable rather than a lipid. Potatoes, like the majority of foods, are a balance of fat, protein, and carbohydrates.

The most prevalent biomolecules on earth are carbohydrates, which include cellulose, starch, creatine, glucose, fructose, and others. Through the process of photosynthesis, carbohydrates are created by reducing the carbon dioxide in the atmosphere with the aid of light energy.

To know more about energy visit:

https://brainly.com/question/1932868

#SPJ1

Answer:

If this is Pre-Algebra or Algebra.

Arithmetic mean (average) = Sum of values/Number of values.

Explanation:

Answer:

Options B

Explanation:

The appropriate quantitative research method for understanding political views held by the young population of a specific area is written surveys (option b). Surveys allow for the collection of data from a large number of participants, and specific questions can be asked to gather data on political views.

Participant observation (option a) involves direct observation of individuals in a natural setting, which may not be practical for studying political views.

Secondary data analysis (option c) involves analyzing data that has already been collected, and may not be specific to the young population or the area of interest.

Laboratory experiments (option d) are typically used to study cause-and-effect relationships between variables, which may not be applicable to studying political views.

Therefore, the best option for understanding the political views held by the young population of a specific area is written surveys.

To understand the political views of the young population of a specific area, a researcher can use written surveys, participant observation, and secondary data analysis as quantitative research methods.

If a researcher is trying to understand the political views held by the young population of a specific area, they should use written surveys, participant observation, and secondary data analysis as quantitative research methods.

https://brainly.com/question/33505242

#SPJ2

Answer:

 ΔV = -2.1 L

Explanation:

To solve this exercise we can use the ideal gas equation for two points

         PV = nRT

          P₁V₁ = P₂ V₂

where point 1 is on the surface and point 2 is at the desired depth,

          V₂ = \(\frac{P_1}{P_2} \ V_1\)

let's calculate

           V₂ = ( \(\frac{1 atm}{2.5 atm}\) ) 3.5 L

            V₂ = 1.4 L

this is the new volume, the change in volume is

          ΔV = V₂ -V₁

          ΔV = 1.4-3.5

          ΔV = -2.1 L

1) The displacement is 0 mi. Option A

2) The average speed is 20 mi/hr. Option C

3) The average velocity is 0 mi/hr. option A

We know that when we talk about the speed, we would look at the ratio of the average distance to the average time that is taken and this would span the entire journey not only a section of the journey.

We must note that the displacement is a vector quantity and as such, we have to look at the direction of the motion of the object.

Displacement = 5 miles - 5 miles = 0 miles

Average speed = Total distance/ Time = 5 miles + 5 miles/ 0.5 hr = 20 mi/hr

Average velocity = Displacement/Time = 0 miles// 0.5 hr =  0 mi/hr

Learn more about speed:https://brainly.com/question/28224010

#SPJ1

Answer:The most common welding methods for automotive jobs include resistance metal inert gas (MIG) welding, plasma arc welding (PAW) and tungsten inert gas (TIG) welding. Learn more about MIG Welding and Other Common Welding Types.

There are various type of welding equipment that are commonly used in automotive shops.the most common form of welding used for automobiles are tungsten inert gas welding (TIG),metal inert gas welding(MIG) and shielded metal arc welding.

It is a type of manual arc welding process which utilizes a consumable electrode covered with flux to protect the weld bead.For SMAW either direct current or alternating current can be used to form the electric arc. The electrode melts and forms a molten weld pool with the base metal by using the thermal energy produced from the electric arc.The weld bead in Shielded metal Arc Welding is formed by the electrode wire core mixing with the molten base metal.

Auto body specialists perform structural repairs on a range of cars and equipment using a variety of automotive welding techniques. They might also create a metal part to enhance an existing building. The most popular welding techniques for automotive projects are tungsten inert gas (TIG), plasma arc, and resistance metal inert gas (MIG) welding.

Thus,There are various type of welding equipment that are commonly used in automotive shops such as Auto-Darkening Welding Helmet Welding Gloves, MIG Welding Pliers, Welding Magnets, Chipping Hammer,Welding,Framing Jig,Metal Brush,Angle Grinder,Metal File,Welding Boots,Safety Glasses and MIG Welding Nozzle Gel.

Learn more about Shielded Metal Arc Welding (SMAW) from here

brainly.com/question/14994590

#SPJ6

Answer:

i don't know but my father i think he can't answer this

Answer:

There are almost 5000 known mineral species, yet the vast majority of rocks are formed from combinations of a few common minerals, referred to as “rock-forming minerals”.

Answer:

The speed each person travels and the distance they travel depends on their mass, friction of the scooter, etc. How would the distance moved by the scooter boards compare if one person had a lot more mass than the other person? The person with less mass would move away faster and would likely move a greater distance.

Answer:

See below

Explanation:

Velocity calculation:

  vf = vo + a t        vf = final velocity    vo = original velocity   a = acceleration

      = 12  +  4 ( 3) = 24 m/s

Displacement /Distance equation :

df = do + vo t      + 1/2 a t^2

       0  +  12 ( 3)  + 1/2 ( 4) ( 9) =  54 m    < === OP

The change in the reservoir, the system or device, and the surroundings are added to determine the overall entropy change. The reservoir's entropy change is. Since entropy is a function of state and we are contemplating a complete cycle (return to initial state), the device's entropy change is zero.

For finite variations at constant T, entropy changes (S) are calculated using the relation G=ΔH - TΔS.

The generation, consumption, conversion, and exchange of thermal energy across physical systems is the focus of the thermal engineering field of study known as heat transfer. Different heat transmission techniques, including thermal conduction, thermal convection, thermal radiation, and energy transfer by phase changes, are categorized.

Conduction is the process through which heat is transported from an object's hotter end to its colder end. Heat naturally transfers from a hotter body to a colder body.

For instance, heat is transferred from the hotplate of an electric stove to the bottom of a saucepan that comes into touch with it.

To know more about heat transfer by conduction, click on the link below:

https://brainly.com/question/2880609

#SPJ9

Answer:

because of gravity the ball falls

Answer:

Gravity

Explanation:

Gravity is the force the world gives which I magnetic and yeah-

The watermelon’s velocity right before it hits the ground is 12.52 m/s.

The principle of conservation of mechanical energy states that the total energy of an isolated system is always conserved.

P.E = K.E

mgh = ¹/₂mv²

gh = ¹/₂v²

v = √2gh

where;

The watermelon’s velocity right before it hits the ground is calculated as follows;

v = √(2 x 9.8 x 8)

v = 12.52 m/s

Learn more about conservation of mechanical energy here: https://brainly.com/question/6852965

Blocks of colored instructions are connected to create programs. Scripts are the name for these collection of blocks. They direct on-screen characters in what to do.

Motion can be characterized as a shift in an object's location with regard to time. Motion can be heard in a variety of sounds, such a book sliding off a table, water running from a faucet, rattling windows, etc. There is motion even in the air we breathe! The universe is a moving thing.

Delete your calendars, task lists, and project management software. Motion uses AI to schedule your day and the days of your team! Your projects, tasks, and meetings are required.

To know more about Motion visit:

https://brainly.com/question/22810476

#SPJ1

Answer:

The time take is  \(t = 1.3964 \ days\)

Explanation:

From the question we are told that

    The decay constant is  \(\lambda = 0.16\)

     The percentage fall is  \(c = 0.80\)

The equation for radioactive decay is mathematically represented as

               \(N(t) = N_o * e^{- \lambda t }\)

Where is \(N(t)\) is the new amount of the new the isotope while \(N_o\) is the original

At initial  \(N_o = 100\)%  = 1

At \(N(t ) = 80\)%  = 0.80  

       \(0.80 = 1 * e^{- 0.16 t }\)

=>     \(-0.223 = -0.16 t\)

=>     \(t = 1.3964 \ days\)

Answer:

t = 1.4 days

Explanation:

The law of radioactive decay gives the amount of radioactive substance, left after a certain amount of time has passed. The formula of law of radioactive decay is given as follows:

N = N₀ (e)^-λt

where,

λ = decay constant = 0.16

N₀ = Initial Amount of the Substance

N = The Amount of Substance Left after Decay = 80% of N₀ = 0.8 N₀

t = Time Required by the Substance to decay to final value = ?

Substituting these values in the law of radioactive decay formula, we get:

0.8 N₀ = N₀ (e)^-0.16 t

0.8 = (e)^-0.16 t

ln (0.8) = -0.16 t

t = - 0.2231/-0.16

t = 1.4 days

NO

Explanation:

A weather chart is a geographical map while an aneroid barometer is an anhydrous barometer(without liquid)