When we say an appliance "uses up electricity," we are really saying thata- main power supply voltage is loweredb- electrons are removed from the circuit and placed elsewherec- current disappearsd- electron kinetic energy is changed to heate- electric charges are lost

Initially, the total momentum of the skaters is zero since they are at rest. After the push-off, the total momentum must remain the same according to the principle of conservation of momentum.

Since the skaters are initially at rest, their total momentum before the push-off is zero. According to the conservation of momentum, the total momentum after the push-off must also be zero.

Therefore, the correct answer is:

remains the same

After the push-off, the total momentum remains zero, indicating that the combined momentum of Ricardo and Paula is still zero. This means that the momentum gained by Ricardo in one direction is balanced by the momentum gained by Paula in the opposite direction, resulting in a net momentum of zero for the system.

Learn more about the conservation of momentum here:

brainly.com/question/29220242

#SPJ11.

Angular momentum is a physics concept that is used to describe rotational motion. The concept of angular momentum is that an object with mass that is rotating or moving with an angular velocity is said to have angular momentum.

When an object rotates with a fixed angular velocity around a fixed axis, both the angular momentum and the moment of inertia around that axis stay constant.As a result, the angular momentum and moment of inertia of an object rotating at a constant angular velocity about a fixed axis stay constant regardless of the position of the object along the arc. The moment of inertia is defined as the resistance of an object to rotational motion about a given axis. It depends on the shape and mass distribution of the object. If an object is rotating about a fixed axis, the moment of inertia is an important quantity to calculate because it determines the angular velocity of the object. Angular momentum is represented by L and is given by the product of the moment of inertia and the angular velocity.

Hence,L = Iω, where L is angular momentum, I is the moment of inertiaω is angular velocity. Therefore, when an object is rotating with a constant angular velocity about a fixed axis, the angular momentum (C) and the moment of inertia (D) about that axis remain constant, irrespective of the position of the object along the arc.

To know more about Angular momentum visit:

https://brainly.com/question/29563080

#SPJ11

Answer:

may be 6 seconds i think so

Answer:

7300 mL

Explanation:

The question is a bit misleading, since tanks generally have a constant volume.  But anyway, using ideal gas law:

PV = nRT

If amount of gas (n) is constant, then:

PV / T = constant

P₁V₁ / T₁ = P₂V₂ / T₂

(1798 kPa) (4579 mL) / (55 + 273) K = (1025 kPa) V / (25 + 273) K

V = 7298 mL

Rounded to two significant figures, the volume is 7300 mL.

Potential energy connected with an object's location in a gravitational field is known as gravitational potential energy. It is the energy that an item has as a result of its height above a reference level in the presence of gravity.

A higher elevation item has greater gravitational potential energy than a lower elevation object because it has the ability to do more work as it falls. As a result, gravitational potential energy is a sort of potential energy, which is energy that an item stores as a result of its location or configuration. Potential energy connected with an object's location in a gravitational field is known as gravitational potential energy. It is the energy that an item has as a result of its height above a reference level in the .  as a result of its height above a reference level in the presence of gravity.

learn more about  potential energy here:

https://brainly.com/question/24284560

#SPJ4

Answer:

the square distance i think doubble check me with others from brainly if i am wrong then i am so sorry.

Answer:

A

Explanation:

Liquid water changes into water vapor because of an increase in the kinetic energy of the particles option (C) is correct.

A material changing from one physical form to another is known as a change of state.

When heated or cooled, the matter may transform from one state to another. When heated, ice (a solid) turns into water (a liquid).

This process is known as MELTING. When heated, the water turns into steam (a gas).

Thus, liquid water changes into water vapor because of an increase in the kinetic energy of the particles option (C) is correct.

The question is incomplete.

The complete question is:

Which of the following causes liquid water to change into water vapor?

A. a decrease in the motion of the particles

B. a decrease in the randomness of the particles

C. an increase in the kinetic energy of the particles

D. an increase in the attraction between the particles

Learn more about the change of state here:

https://brainly.com/question/14778824

#SPJ6

Answer:

Do you know the equation for heat transfer? And what the symbols mean?

Explanation:

And how are you, hope life's good

To increase the boiling temperature of 2051 g of water by 1.500 °C, approximately 3.431 grams of NaCl would need to be added.

Explanation:

The boiling point elevation is determined by the molality of the solute in the solution. The equation for boiling point elevation is:

ΔTb = Kb * m

Where:

ΔTb is the boiling point elevation,

Kb is the boiling point elevation constant for water (0.5100 °C/m),

m is the molality of the solute.

To calculate the molality, we can use the formula:

m = (moles of solute) / (mass of solvent in kg)

Given that we want to increase the boiling temperature by 1.500 °C, and the Kb value is 0.5100 °C/m, we can rearrange the equation to solve for the molality:

m = ΔTb / Kb

m = 1.500 °C / 0.5100 °C/m

m ≈ 2.941 m

To convert molality to mass, we need to know the molecular weight of NaCl. The molecular weight of NaCl is approximately 58.44 g/mol.

Using the formula:

mass of solute = molality * molecular weight of solute * mass of solvent in kg

mass of solute = 2.941 m * 58.44 g/mol * 2.051 kg

mass of solute ≈ 3.431 g

Therefore, approximately 3.431 grams of NaCl would need to be added to 2051 g of water to increase the boiling temperature of the solution by 1.500 °C.

Learn more about boiling point elevation and the calculation of molality in solution chemistry. #SPJ11

The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2), the long it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet is 1.414 seconds.

Free fall is a type of movement that an object undergoes when it falls freely under the effect of gravity. Gravity is a force that acts on every object and makes it move towards the center of the earth or any other celestial body. The acceleration due to gravity is expressed as g, and it is equal to 9.8 m/s² on earth. The time it takes a rock falling from rest to reach a velocity of 27.2 m/s on this planet can be calculated by equating the acceleration due to gravity with the given velocity.

The formula for velocity is given by V=U+at, where V is the final velocity, U is the initial velocity, a is the acceleration, and t is the time taken to reach the final velocity. Under free fall, the initial velocity is zero; therefore, the formula can be simplified to V = at.

Substituting the given values in the formula, we get 27.2=1.33t² × g or 27.2=1.33t² × 9.8.

We can simplify this equation to t² = (27.2)/(1.33 × 9.8) or t² = 2.

The square root of 2 is 1.414. Therefore, the time taken for the rock to reach a velocity of 27.2 m/s on this planet is 1.414 seconds.

Learn more about free fall at:

https://brainly.com/question/31260515

#SPJ11

According to the information in the fragment, it can be inferred that it is an example of how scientific development has consequences on pre-established theories and new areas are created in science (option C)

A scientific theory is a term to refer to a set of concepts and observations that are proposed as principles to explain a class of phenomena.

According to the above, the discovery of germs and their relationship with human diseases was an event that changed scientific theories about human diseases because it demonstrated a different explanation than what was believed up to that time.

So, the correct answer is option C because this event changed scientific theory and opened new fields for scientific study and research.

Learn more about sciences in: https://brainly.com/question/12265124

#SPJ1

Answer:

Explanation:

According to the information in the fragment, it can be inferred that it is an example of how scientific development has consequences on pre-established theories and new areas are created in science (option C)

What is a scientific theory?

A scientific theory is a term to refer to a set of concepts and observations that are proposed as principles to explain a class of phenomena.

According to the above, the discovery of germs and their relationship with human diseases was an event that changed scientific theories about human diseases because it demonstrated a different explanation than what was believed up to that time.

So, the correct answer is option C because this event changed scientific theory and opened new fields for scientific study and research.

Galactic spiral arms are traced out by Option E. globular cluster regions.

A spiral galaxy typically has a rotating disc with spiral palms that curve out from a dense relevant location. The Milky manner is a spiral galaxy. 4 instructions are used to categorize galaxies: spiral; barred spiral; elliptical and irregular.

Galactic spiral are actively forming stars and comprise a large fraction of all the galaxies inside the neighborhood universe. abnormal galaxies, which have very little dust, are neither disk-like nor elliptical. Astronomers frequently see irregular galaxies as they peer deeply into the universe, which is equal to searching lower back in time.

Spiral galaxies are commonly observed in low-density areas, and very hardly ever in the middle of galaxy clusters. maximum spiral galaxies incorporate a supermassive black hollow inside the middle of the significant bulge. Spiral galaxies tend to be the brightest galaxies in the universe.

Learn more about Galactic spiral here:-https://brainly.com/question/13956361

#SPJ4

Answer:

below

Explanation:

According to Newtons Second Law of Motion, also known as the Law of Force and Acceleration, a force upon an object causes it to accelerate according to the formula net force = mass x acceleration. So the acceleration of the object is directly proportional to the force and inversely proportional to the mass.

False.

Interstellar matter is not distributed evenly through the galaxy. It is concentrated in certain areas such as in molecular clouds and star-forming regions, and is much less dense in other areas such as the interstellar medium between stars.

This uneven distribution of interstellar matter affects the formation and evolution of stars and planetary systems within the galaxy.

To know more about Interstellar matter refer here

https://brainly.com/question/3681062#

#SPJ11

C it reduces the amount of useful work done on objects move it up the ramp

The gravitational force on the object of masses 3.1×10²³ kg and  7.3×10⁵ kg respectively is 8.16×10⁻³ N.

Gravitational force is the most prevalent force in the universe, pulling together on any two objects with mass in the universe.

To calculate the magnitude of the gravitational force, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the gravitational force is 8.16×10⁻³ N.

Learn more about gravitational force here: https://brainly.com/question/19050897

#SPJ1

Explanation:

Efficiency is a way of describing the amount of useful ​output​ a process or machine can generate as a percentage of the ​input​ required to make it go. In other words, it compares how much energy is used to do work versus how much is lost or wasted to the environment. The more efficient the machine, the less energy wasted.

For example, if a heat engine is able to turn 75 percent of the fuel it receives into motion, while 25 percent is lost as heat in the process, it would be 75 percent efficient. Out of the original 100 percent of the fuel, 75 percent was output as useful work.  

the equation:

energy efficiency =useful output energy/total input energy

The correct statements are: [1] If the absorbance band of an interferent can be blocked by the slit while still passing the absorbance band of the analyte, [3] If narrowing the slit causes the light band passed to go from polychromatic to monochromatic light, [4] If the bandwidth of the light passed by the slit includes some of the baseline.

By adjusting the slit width on a monochromator, it is possible to selectively block certain absorbance bands while allowing others to pass through. This can be useful in eliminating interference from other substances in the sample.

Narrowing the slit width reduces the range of wavelengths that can pass through, resulting in a more monochromatic light. This can enhance the sensitivity of absorbance measurements by reducing background noise.

If the bandwidth of the light passed by the slit includes some of the baseline, it can lead to inaccuracies in absorbance measurements. Narrowing the slit width helps to minimize the inclusion of baseline noise, improving the sensitivity of the measurement.

Learn more about light here:

https://brainly.com/question/166544

#SPJ11

Answer:

a) ii

b) i

c)iii

d)iii

e) i

f)iii

Explanation:

i hope this will help

Answer:

the answer of b is N and d is mol

Answer: A.9.2m/s

Explanation:

The temperature of 96 F in Celsius is 35.56 C

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature.

The temperature conversion from Fahrenheit to Celsius can be done using the following formula: C = (F - 32) * 5/9, where C is the temperature in Celsius and F is the temperature in Fahrenheit.

To find the temperature in Celsius when given the temperature in Fahrenheit, we can plug in the given value of F into the formula and solve for C.

In this case, F = 96.

C = (96 - 32) * 5/9
C = 64 * 5/9
C = 35.56

Therefore, the temperature of 96 F in Celsius is 35.56 C.

TO know more about temperature conversion here:

https://brainly.com/question/13421795#

#SPJ11

If you look at courage and if you look at the brain, there is one particular brain structure that plays a very important role when it comes to courage and your own performance. This part of the brain is called the amygdala. The amygdala is a brain structure that is very small, and we have two of them, one of the left side of the brain, one on the right side of the brain. They’re very small and look like an almond. Amygdala is also the Latin word for almond. Even though they are small, they amygdala is also extremely powerful. It plays a very important role in our survival. Whenever there is a real danger outside, it will trigger a fight, flight or freeze response, so you will fight danger, run away, or just be blocked in your own emotions, you will freeze, perhaps you will hide. The amygdala is very important for our survival and for many emotions in general, but in many situations, the amygdala will also become active when there is no real danger, for example, standing on stage and holding a presentation, leading a difficult conversation. These are two examples where there’s no real danger, but nevertheless, the amygdala can be triggered and cause this feeling of nervousness and anxiety. It’s these feelings of nervousness, anxiety or insecurity that will also block us in our potential to hold a presentation or to lead a good conversation.

A species-specific, genetically programmed pattern of behavior is known as an instinct. It includes activities like migration, hunting, and grooming and is essential for an animal's survival; it is not learned but inherited.

A species-specific reaction pattern that is intrinsic and genetically encoded is known as an instinct. It is an activity or habit that is present from birth or hatching and is not learned but rather inherited. An animal's ability to reproduce and survive depends on these instincts. Depending on the species, instincts may involve activities including migration, nest-building, hunting, and grooming. Animals may compete for resources and adapt to their environments thanks to these behaviors, which are frequently complicated and quite particular. Natural selection is assumed to have led to the evolution of instincts, with creatures with advantageous instincts having a higher chance of surviving and passing on their genes to subsequent generations.

learn more about genetically programmed here:

https://brainly.com/question/15048208

#SPJ4

NASA's space shuttle program in Florida will end in 2011. Increase in tourism and decrease in use of space technologies in homes would be the most likely outcome of this event on the locations near the space center.

The U.S. federal government's autonomous National Aeronautics and Space Administration (NASA) is in charge of the civil space programme, as well as space and aeronautics research.

NASA was created in 1958 to provide the American space development effort a distinctly civilian orientation, stressing peaceful applications in space science. It succeeded the National Advisory Committee for Aeronautics (NACA).

Learn more about NASA here:

https://brainly.com/question/20763143

#SPJ1

Answer:

b. There will be more electrons emitted.

Explanation:

In photoelectric emission, the energy of the emitted electron is dependent on the frequency of the wave incident on the plate; but not the intensity. The rate of electron emission per unit time however depends on the intensity of the incident light. So increasing the intensity of the light at constant frequency will only affect the number of electrons emitted per unit time.

Answer:

The force of gravity exerts a downward force. The floor exerts an upward force. Since these two forces are of equal magnitude and in opposite directions, they balance each other.

The cost of running the refrigerator for 30 days is 18.72 dollars.

The energy usage of a refrigerator with a 1000 W compressor that runs only 20% of the time is to be calculated in dollars per kWh, as electricity costs 0.13 dollars/kWh.SolutionThe energy consumption of a refrigerator can be determined by calculating the energy consumed over time. Let's assume that electricity costs 0.13 dollars/kWh.Cost of running the refrigerator in 1 hour = 0.13 * 1kW = 0.13 dollars

Since the compressor only runs 20% of the time, its running time will be 0.2 * 1 hour = 0.2 hoursThe energy used by the refrigerator in 30 days is the product of energy used per hour and the number of hours in 30 days. There are 24 hours in a day, so there are 24 * 30 = 720 hours in 30 days.

Cost of running the refrigerator in 0.2 hours = 0.13 * 1kW * 0.2 = 0.026 dollars

Cost of running the refrigerator in 30 days = 720 * 0.026 dollars= 18.72 dollars

To know more about internal energy visit:

https://brainly.com/question/11742607

#SPJ11

Answer:

\(\huge\boxed{\sf a = -2 \ m/s^2}\)

Explanation:

Initial velocity = \(V_i\) = 20 m/s

Final velocity = \(V_f\) = 12 m/s

Time = t = 4 s

Acceleration = a = ?

\(\displaystyle a = \frac{V_f-V_i}{t}\)

Put the given data in the above formula.

\(\displaystyle a =\frac{12 - 20}{4} \\\\a =\frac{-8}{4} \\\\a = -2 \ m/s^2\\\\\rule[225]{225}{2}\)

Answer:

4 weight loss

Explanation: