If 42 J of chemical energy in a battery places 7.0 C of negative charge at the negative terminal,
leaving a deficit at the positive terminal, what is the potential difference between the negative and
positive terminals of the battery?

Answer:

It would go out the bottom hole faster.

Explanation:

It goes down the bottom hole faster because the water would get poured out the bottom before they even flipped the water bottle.

The mass of the coin is 8.5 g.

The change in temperature of a substance is directly proportional to the heat absorbed or lost by that substance, and inversely proportional to its heat capacity. The heat absorbed or lost by a substance can also be calculated using the equation Q=mcΔT, where Q is the heat, m is the mass, c is the specific heat capacity and ΔT is the change in temperature.

Given the information provided, we can use the equation Q = mcΔT to find the mass of the coin.

Q = mcΔT

First, we need to know the specific heat capacity of water and copper. Water's specific heat capacity is 4.184 J/g°C and Copper is 0.39 J/g°C.

Now we know that the heat lost by the coin = heat gained by water

mc1ΔT1 = mc2ΔT2

where

c1 is the specific heat of copper

c2 is the specific heat of water

Therefore:

(m * 0.39 J/g°C) * 68.0°C = (101 g * 4.184 J/g°C) * 8.39°C

Solving for m we get:

m = (101 g * 4.184 J/g°C * 8.39°C) / (0.39 J/g°C * 68.0°C)

m = 8.5 g

Therefore, the mass of the coin is 8.5 g.

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Answer:

(a) 1317.44 W/m²

(b) 1.74×10¹⁵ litres of heating oil

(c) -20.63°C

(d) Energy storage in the Earth and the air

Explanation:

The parameters given are;

Luminosity of the Sun = 3.828 × 10²⁶ Watt

Distance of the Earth from the Sun, d = 152.06 × 10⁶ km

The radius of the Sun = 696 × 10³ km

The radius of the Earth, \(r_E\) = 6730 km

The surface area of the Sun = 12000 × Surface area of the Earth

The surface area of the Sun = 6.09 × 10¹² km²

Cross sectional area of the Earth = 1.27 × 10⁴ m² = 0.0127 km²

By the inverse square law, we have;

\(R = \dfrac{Luminosity \, of \, the \, Sun}{4 \pi d^2}\)

Where:

R = Solar radiation reaching the Earth

Therefore;

\(R = \dfrac{3.828 \times 10^{26}}{4 \times \pi \times (1.5206 \times 10^{11})^2} = 1317.44 \ W/m^2\)

Hence, the energy, E, reaching the Earth in a day is given as follows;

E = R × 4×π×\(r_E\)²×60×60×24 = 1317.44 × 4 × π × 6730000² × 60×60×24

E = 6.479×10²² Joules

(b) The number of litres of heating oil is therefore;

6.479×10²² J ÷ (37.3×10⁶ J/litre) = 1.74×10¹⁵ litres of heating oil

(c) 30% of the Energy is reflected, therefore;

0.7 × 6.479×10²² Joules = 4.54×10²² Joules reaches the Earths surface

From Stefan-Boltzmann law, we have;

\(T = \left (\dfrac{\left (1 - \alpha \right ) \times R }{4\times \sigma } \right )^{\dfrac{1}{4}}\)

Where:

α = 0.3

σ = Stefan-Boltzmann constant = 5.6704×10⁻⁸ W/(m²·K⁴)

Therefore;

\(T = \left (\dfrac{\left (1 - 0.3 \right ) \times 1317.44 }{4\times 5.6704 \times 10^{-8} } \right )^{\dfrac{1}{4}} = 252.52 \ K = -20.63 ^{\circ} C\)

(d) The heat storage in the Earth and the air

The basic function of a transformer is to convert one level of electrical voltage or current to another level. Therefore, the correct answer is C, low voltage to high or vice versa.

Transformers are used extensively in electrical power systems to step up the voltage for transmission and step down the voltage for distribution. They operate on the principle of electromagnetic induction and have no moving parts, making them highly efficient and reliable. Transformers can be found in many applications such as power supplies, audio systems, and medical equipment. They play a critical role in modern technology by allowing the efficient transmission and distribution of electricity.
The basic function of a transformer is involved in the conversion process C: low voltage to high voltage or vice versa. Transformers are crucial in power transmission and distribution systems, as they are used to step up or step down voltage levels according to the requirements, allowing efficient transfer of electrical energy. It's important to note that transformers only work with alternating current (AC) and do not convert mechanical energy to electrical, electrical energy to mechanical, or alternating current to direct current.

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Answer:

explanations below

Explanation:

From the attached document, it can be seen that Stations 2 and 3 are further away from the epicenter unlike stations 1 and 4. Stations 2 and 3 are likely going to record fewer waves than the others because as the wave travel such distances, part of it are bent by the earth’s interior and some of the materials in earth also reflect some of the waves.

It takes approximately 4.59 seconds for the car to come to a stop. the car's initial speed was approximately 110.2 ft/s,

To determine the time it takes for the car to stop and the car's initial speed, we can use the kinematic equation:

v² = u² + 2as

where:

v is the final velocity (0 ft/s, since the car comes to a stop),

u is the initial velocity (unknown),

a is the acceleration (-24.0 ft/s², as the car slows down),

and s is the distance traveled (253 ft).

Plugging in the known values into the equation, we can solve for u:

0² = u² + 2(-24.0 ft/s²)(253 ft)

0 = u² - 48.0 ft/s² * 253 ft

48.0 ft/s² * 253 ft = u²

u² = 12144 ft²/s²

Taking the square root of both sides:

u = √12144 ft/s

u ≈ 110.2 ft/s

So, the car's initial speed was approximately 110.2 ft/s.

Now, to find the time it takes for the car to stop, we can use the equation:

v = u + at

0 = 110.2 ft/s + (-24.0 ft/s²) * t

24.0 ft/s² * t = 110.2 ft/s

t = 110.2 ft/s / 24.0 ft/s²

t ≈ 4.59 s

Therefore, it takes approximately 4.59 seconds for the car to come to a stop.

In summary, the car's initial speed was approximately 110.2 ft/s, and it took approximately 4.59 seconds for the car to come to a stop while skidding a distance of 253 ft.

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The lowest frequency at which the circuit can operate can be determined using the formula:
f = (1 / (2π√(L3 * C)))
The lowest frequency at which the circuit can operate is not limited by the given parameters.

Given that L3 is 24 mH (millihenries), we can convert it to henries by dividing it by 1000:
L3 = 24 mH = 0.024 H
Assuming the circuit operates at the resonant frequency, the inductive reactance (XL) and capacitive reactance (XC) cancel each other out, resulting in a purely resistive circuit. This means that the impedance (Z) of the circuit is equal to the resistance (R). In this case, the impedance is given by:
Z = Vrms / Irms = 7.0 V / 1.0 A = 7.0 Ω
Since Z = R, we can consider R as the effective resistance of the circuit.
Using the impedance and inductance values, we can calculate the capacitance (C) required for the circuit:
Z = √(R² + (XL - XC)²)
7.0 Ω = √(R² + (2πfL3 - 1 / (2πfC))²)
Since we want to find the lowest frequency, we can assume that the capacitive reactance is at its maximum value, which occurs when XC = 1 / (2πfC) is at its minimum. This happens when the denominator is at its maximum value, which occurs when fC is at its minimum.
Therefore, the lowest frequency (f) occurs when fC = 1 / (2πfC) is at its minimum.
Simplifying the equation, we have:
1 / (2πfC) = 2πfC
1 = (2πfC)²
1 = 4π²f²C²
f²C² = 1 / (4π²)
Now we can substitute the given values and solve for the lowest frequency (f):
(1 / (4π²)) * C² = 1 / (4π²)
C² = 1
Since C is the capacitance, its value cannot be negative. Therefore, the equation C² = 1 has a valid solution, which means that the lowest frequency (f) is not restricted by the given constraints.
In conclusion, the lowest frequency at which the circuit can operate is not limited by the given parameters.

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The remote control can overhang the edge of the table by a maximum of 0.752 m and still not tip over when the power button is pressed.

To prevent the remote control from tipping over, the torque due to the force required to press the power button must be balanced by the torque due to the weight of the remote control acting on the opposite side of the pivot point. The torque due to the force can be calculated as:

τ_force = F * l

where F is the force required to press the power button and l is the length of the overhang.

The weight of the remote control can be calculated as:

w = m * g

where m is the mass of the remote control and g is the acceleration due to gravity.

The torque due to the weight can be calculated as:

τ_weight = w * (l/2)

where (l/2) is the distance from the pivot point to the center of mass of the remote control.

For the remote control to be in equilibrium and not tip over, the two torques must be equal:

τ_force = τ_weight

Substituting the expressions for the torques gives:

F * l = w * (l/2)

Solving for the maximum overhang length (l) gives:

l = 2 * F / (m * g)

Substituting the given values gives:

l = 2 * 0.350 N / (0.095 kg * 9.81 m/s^2) ≈ 0.752 m

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To solve this problem, we need to know the speed of sound in the liver. The speed of sound varies depending on the medium it is traveling through. In human tissues, it's typically around 1540 m/s, but it can vary slightly.

Once we have the speed of sound, we can use the formula for distance, which is speed multiplied by time. However, since the sound wave travels to the reflector and back, the time we have is actually twice the time it takes for the sound wave to reach the reflector. Therefore, we need to divide the total time by 2 to get the time it takes for the sound wave to reach the reflector.

Let's use these values to calculate the distance.

The distance from the source to the reflector is approximately 1.54 millimeters (mm).

This is calculated by using the speed of sound in the liver (1540 m/s) and the time it takes for the sound wave to reach the reflector (1 microsecond, which is half of the total time of 2 microseconds). The formula for distance is speed multiplied by time, so the calculation is 1540 m/s * 1 microsecond = 0.00154 meters, or 1.54 mm.

La densidad del metal como se requiere en la pregunta es 7.8 * 10 ^ 3 Kg / m ^ 3.

Sabemos que ese empuje hacia arriba = peso en aire - peso en líquido

Peso en el aire = 63,5 * 10 ^ -3 Kg * 10 m / s ^ 2 = 0,635 N

Peso en líquido = 55,4 * 10 ^ -3 Kg * 10m / s ^ 2 = 0,554 N

Empuje hacia arriba = 0,635 N - 0,554 N = 0,081 N

Pero ;

Empuje hacia arriba = Volumen * densidad del fluido * aceleración debido a la gratitud

volumen = empuje hacia arriba / densidad del fluido * aceleración debido a la gratitud

volumen = 0.081 N / 1000 * 10

Volumen = 8.1 * 10 ^ -6 m ^ 3

Densidad = masa / volumen

Densidad = 63,5 * 10 ^ -3 Kg / 8,1 * 10 ^ -6 m ^ 3

= 7,8 * 10 ^ 3 kg / m ^ 3

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Answer:

Physics is the study of the interactions between physical systems. The physicist attempts to describe the interaction with the most fundamental and general law or principle possible. ... All electrical phenomena involve the interaction between positive and negative charges.

Answer:

What is Physics at NTNU?

Physics is a natural science based on experiments, measurements and mathematical analysis with the purpose of finding quantitative physical laws for everything from the nanoworld of the microcosmos to the planets, solar systems and galaxies that occupy the macrocosmos.

The laws of nature can be used to predict the behaviour of the world and all kinds of machinery. Many of the everyday technological inventions that we now take for granted resulted from discoveries in physics. The basic laws in physics are universal, but physics in our time is such a vast field that many subfields are almost regarded as separate sciences.

The early Greeks established the first quantitative physical laws, such as Archimedes' descriptions of the principle of levers and the buoyancy of bodies in water. But they did not actually conduct experiments, and physics as science stagnated for many centuries. By the 17th century, however, Galileo Galilei and later Issac Newton helped pioneer the use of mathematics as a fundamental tool in physics, which led to advances in describing the motion of heavenly bodies, the laws of gravity and the three laws of motion.

The laws of electricity, magnetism and electromechanical waves were developed in the 1800s by Faraday and Maxwell, in particular, while many others contributed to our understanding of optics and thermodynamics.

Modern physics can be said to have started around the turn of the 20th century, with the discovery of X-rays (Röntgen 1895), radioactivity (Becquerel 1896), the quantum hypothesis (Planck 1900), relativity (Einstein 1905) and atomic theory (Bohr 1913).

Quantum mechanics (Heisenberg and Schrödinger), beginning in 1926, also gave scientists a better understanding of chemistry and solid state physics, which in turn has led to new materials and better electronic and optical components. Nuclear and elementary particle physics have become important fields, and particle physics is now the basis for astrophysics and cosmology.

Answer:

Fe

Explanation:

Dựa vào dãy hoạt động hóa học của kim loại

Given data

*The given frequency is

*The another given frequency is

*The given speed of light is c = 3.0 × 10^8 m/s

(a)

The formula for the wavelength is given as

Substitute the known values in the above expression as

The another wavelength for the another frequency is calculated as

(b)

Radio spectrum is an electromagnetic spectrum where the frequency range belongs of wireless telecommunication.

The total kinetic energy of sphere is 12.051J, the rotational kinetic energy is 0.22v²/5, and the translational kinetic energy is 0.55v².

To determine the sphere's total kinetic energy, you must first calculate its total mechanical energy at the top of the ramp. At the top of the ramp, the sphere has gravitational potential energy, which is expressed as: mgh = (2.2 kg)(9.81 m/s²)(0.55 m) = 12.051 J. At the bottom of the ramp, the sphere's gravitational potential energy is converted to kinetic energy, which is equal to the sphere's total mechanical energy.

Ek(total) = mgh = 12.051 J

The rotational kinetic energy can be calculated using the following formula: Ek(rot) = Iω²/2where I is the moment of inertia and ω is the angular velocity. To find the moment of inertia of the sphere, use the formula: I = (2/5)mr² = (2/5)(2.2 kg)(0.15 m)² = 0.02475 kg m²For a sphere rolling without slipping, the linear velocity of the center of mass is equal to the radius of the sphere multiplied by the angular velocity of the sphere.ω = v/r, where v is the linear velocity of the sphere's center of mass. Ek(rot) = Iω²/2 = (0.02475 kg m²)(v/r)²/2 = (0.5)(2.2 kg)(v)² = mv²/5where v is the sphere's linear velocity. Ek(rot) = mv²/5 = (2.2 kg)(v²/2²)/5 = 0.22v²/5

The translational kinetic energy can be calculated using the formula: Ek(trans) = mv²/2where m is the mass of the sphere and v is the linear velocity of its center of mass. Ek(trans) = mv²/2 = (2.2 kg)(v²/2²)/2 = 0.55v²Therefore, the sphere's total kinetic energy is 12.051 J, the rotational kinetic energy is 0.22v²/5, and the translational kinetic energy is 0.55v².

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The change in temperature of the copper block of mass 125 g is 2 °C.

a process whereby the degree of hotness of a body (or medium) changes from one value to another.

To calculate the change in temperature of the copper, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the change in temperature of the copper block is 2 °C.

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Answer:true

Explanation:

Answer:

Req= 220 ohm

Explanation:

In series combination just add the resistances.

Req=R1+Req(23)

Req=100+120

Req= 220 ohm

Decrease in potential difference causes decrease in potential energy.

A dielectric produces an internal electric field when it is exposed to an electric field because the dielectric is polarized. The potential difference between the plates is caused by the internal electric field within the dielectric, which is in the opposite direction of the field between the plates of the capacitor. As a result, the effective electric field between the plates of the capacitor diminishes.

E = ΔV/Δr

Where, Δr = distance between plates, which is constant

Potential energy of a capacitor is;

U = (1/2)qΔV

Where, Charge is constant .

Therefore, potential energy U likewise drops as a result of the potential difference V being smaller.

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The path traveled by the proton will be larger than that of the electron due to its larger mass and charge. When a proton and an electron are released at the same speed traveling in the same direction into a region with a uniform magnetic field, they will both experience a force due to the magnetic field.

The direction of this force is perpendicular to the direction of motion of the particle and the direction of the magnetic field, and its magnitude is proportional to the charge of the particle, its velocity, and the strength of the magnetic field. As a result, both the proton and the electron will follow a circular path in the magnetic field. However, since the mass of the proton is much greater than that of the electron, the proton will have a much larger momentum and a larger radius of curvature than the electron.

This means that the proton will travel in a larger circular path compared to the electron. Additionally, since the force on the proton is proportional to its charge, which is much greater than that of the electron, the proton will experience a much greater force than the electron, causing it to move in a larger circle than the electron. When released at the same speed and direction into a uniform magnetic field, the proton, and the electron will both move in circular paths, but the path traveled by the proton will be larger than that of the electron due to its larger mass and charge.

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The average change in momentum for the car during the trip is 8400 kg·m/s.

What is Momentum?

Momentum is a vector quantity, meaning it has both magnitude and direction. The direction of momentum is the same as the direction of velocity, and its magnitude is proportional to both the mass and the velocity of the object.

Then, we calculate the final momentum of the car during the remaining 3 hours:

Final momentum during the remaining 3 hours = mass × final velocity during the remaining 3 hours = m × v2

Now, we can calculate the average change in momentum:

Average change in momentum = Final momentum - Initial momentum

= (Final momentum during the first 2 hours + Final momentum during the remaining 3 hours) - Initial momentum

= [(m × v2) + (m × v2)] - (m × v1)

= 2m × v2 - m × v1

Plugging in the given values:

Mass of the car (m) = 1400 kg

Initial velocity (v1) = 32 m/s

Final velocity during the first 2 hours (v2) = 38 m/s

Average change in momentum = 2m × v2 - m × v1

= 2 × 1400 kg × 38 m/s - 1400 kg × 32 m/s

= 53200 kg·m/s - 44800 kg·m/s

= 8400 kg·m/s

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The work  was done to move the block  across the floor  is 400 Joule.

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.

A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Force applied on the block: F = 40 N.

Displacement of the box = 10 m.

Hence, work  done to move the block = Force × Displacement

= 40 × 10 joule

= 400 joule.

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1) Any mechanical interactions taking place in the process should be frictionless, to make a process perfectly reversible

What is mechanical interactions?

Mechanical interactions are physical forces that are used to affect the behavior of objects and materials. This can include contact forces such as friction, tension, and compression, as well as non-contact forces such as gravity, magnetism, and electric fields

Mechanical interactions can be used to cause objects to move, change shape, or experience a change in energy. These interactions can also be used to create, store, or transfer energy. Mechanical interactions are studied by engineers and scientists in multiple disciplines, and are used in many different applications, including the design of machinery, medical devices, and consumer products.

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Answer:

Displacement (km)

Explanation:

The y axis is the vertical axis pointing up and down. This is labeled as the the displacement (km) in the graph.

ANSWER: the answer is down .

Answer:

Zero

Explanation:

Because at the top of path the rock is not accelerating until it starts going down

Yes, Ballistic stretching can be harmful if it is not performed properly.

This type of stretching involves bouncing movements, which can place excessive strain on the muscles and connective tissues. This can lead to muscle strains or tears, as well as other injuries. It is important to use caution when performing ballistic stretches and to stop if any pain or discomfort is experienced. It is also recommended to warm up before stretching and to stretch slowly and smoothly, rather than using ballistic movements.

Ballistic stretching can also increase the risk of muscle imbalances and poor posture if it is not balanced with other types of stretching, such as static stretching. It is generally more effective and safer to gradually increase flexibility through regular, consistent stretching rather than trying to force the body to stretch too quickly or aggressively.

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Answer:

A student becomes negatively charged because of the friction between his socks and the carpet. ... The electrons get rubbed and move towards the carpet so the carpets electrons move away and the student becomes negatively charged.

The relationship between the work done while moving a book to a higher bookshelf and the potential energy is The work done is equal to the increase in gravitational potential energy.

The energy that an item retains due to its position in relation to other objects, internal tensions, electric charge, or other reasons is known as potential energy in physics. To move a thing, energy must be transmitted to it. Force is another way to transfer energy. Work or work done refers to the energy expended when a force is used to move an item. Potential energy is a type of stored energy that depends on the locations of various system components in relation to one another. A spring's potential energy is increased by stretching or contracting it. When a steel ball is lifted above the earth's surface as opposed to being brought to it, it has more potential energy. Potential energy is the energy that an object has stored as a result of its location or condition.

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The highest flow rate that this filter can process is 2,160 gpm.

The maximum filtration rate allowed for a filter depends on the filter's size and the permissible flow rate per unit area of the filter. In this case, the filter has an area of 18 feet x 20 feet = 360 square feet.

The surface area of the filter is:

18 feet x 20 feet = 360 square feet

To determine the maximum flow rate, we need to multiply the surface area by the maximum filtration rate allowed:

360 square feet x 6.0 gpm/ft2 = 2,160 gallons per minute (gpm)

Therefore, the highest flow rate that this filter can process is 2,160 gpm.

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Answer:

\(\boxed {\boxed {\sf \frac {8}{3} \ m/s^2 \ and \ not \ higher \ than \ the \ car's \ acceleration }}\)

Explanation:

Acceleration is the rate of change of velocity with respect to time. It is calculated by dividing the change in velocity by the time.

\(a= \frac {v_f-v_i}{t}\)

1. Motorist Acceleration

The motorist accelerates from an initial velocity of 0 meters per second to a final velocity of 8 meters per second in 3 seconds.

Substitute the values into the formula.

\(a= \frac{ 8 \ m/s - 0 \ m/s }{3 \ s}\)

Solve the numerator.

\(a= \frac{8 \ m/s}{3 \ s}\)

\(a= \frac{8}{3} \ m/s^2\)

\(a \approx 2.667 \m/s^2\)

2. Car Acceleration

The car accelerates from an initial velocity of 0 meters per second to a final velocity of 30 meters per second in 6 seconds.

Substitute the values into the formula.

\(a= \frac{ 30 \ m/s - 0 \ m/s }{6 \ s}\)

Solve the numerator.

\(a= \frac{30 \ m/s}{6 \ s}\)

\(a= { 5 \ m/s^2}\)

The motorist's acceleration is 8/3 or approximately 2.667 meters per second squared. This is not higher than the car's acceleration of 5 meters per second squared.