What happens in terms of energy when a moving car hits a parked car, causing the parked car to move?

The amount of thermal energy produced when the crate slides at a constant speed is27,618.38 J.

The amount of thermal energy produced by a 750 N crate that slides down a ramp that makes a 25° angle with the horizontal and travels a distance of 10 m at a constant speed can be calculated using the formula for work-energy theorem.

Let's first calculate the speed at which the crate slides down the ramp. Using the formula:

tan(θ) = opposite/adjacent

tan(25°) = h/10

h = 10 tan(25°)

h = 4.27 m

So, the height of the ramp is 4.27 m. From the work-energy theorem,W = ΔK+Wnc. Here, Wnc represents the non-conservative work. As the crate slides down the ramp, the frictional force acting on it does non-conservative work by converting mechanical energy into thermal energy.

Therefore, Wnc = ΔEthermal where ΔEthermal is the change in thermal energy. To calculate ΔK, we need to first calculate the speed of the crate. Using the formula:

mg sin(θ) - μmg cos(θ) = ma750 sin(25°) - 0.3 × 750 cos(25°) = 750 a

0.4229 - 193.08 = 750 a-192.66 = 750 a

Therefore, a = -0.2568 m/s²

Negative sign indicates that the acceleration of the crate is opposite to the direction of motion (i.e., upwards against the gravity).Using the formula:

v² - u² = 2asv² - 0² = 2 × (-0.2568) × 4.27v = 1.165 m/s

So, the speed of the crate is 1.165 m/s.To calculate ΔK, using the formula:

ΔK = ½mv² - ½mu²= ½ × 750 × (1.165)² - 0= 508.33 J

Therefore, W = ΔK + WncΔEthermal = Wnc = W - ΔK= mgh + ½mv² - ½mu² - ΔK= 750 × 9.81 × 4.27 + ½ × 750 × (1.165)² - 0 - 508.33= 28,126.71 J - 508.33 J= 27,618.38 J

Therefore, the amount of thermal energy produced is 27,618.38 J.

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Answer: If the difference in electronegativity for the atoms in a bond is greater than 0.4, we consider the bond polar. If the difference in electronegativity is less than 0.4, the bond is essentially nonpolar. If there are no polar bonds, the molecule is nonpolar

Answer:

A note of frequency 300 Hz is produced when the length of a wire is 80 cm and the tension is 40 N. What is the frequency...

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Explanation:

A note of frequency 300 Hz is produced when the length of a wire is 80 cm and the tension is 40 N. What is the frequency if the length of the wire is halved and the tension is doubled? NECO 200834 Ans: 848.4 Hz

i don't really get the question

sorryyyy

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

The divers final speed before hitting the bottom is 14.0 m/s.

The time taken for the skydiver to fall from the given height affects the  final velocity  of the diver and it is calculated by using the following kinematic equation.

v² = u² + 2gh

where;

Substitute the given parameters and solve for the final velocity.

v² = 0 + 2gh

v = √2gh

v = √(2 x 9.8 x 10)

v = 14.0 m/s

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\( \LARGE{ \underline{ \blue{ \tt{Required \: answers}}}}\)

First of all,

We have,

➝ Angle of reflection = 35°

(a) According to law of reflection,

Angle of incidence = Angle of reflection

➝ Angle of incidence = 35°

(b) By using formula,

Angle of Deviation = 180° - 2(Angle of incidence)

From (a),

➝ Angle of Deviation = 180° - 2(35°)

➝ Angle of Deviation = 180° - 70°

➝ Angle of Deviation = 110°

(c) We know,

Angle of Incidence + Glance angle of incidence = 90°

Angle of reflection + Glance angle of reflection = 90°

So,

As angle of incidence = angle of reflection

Then, Angle of glance is also equal.

➝ Angle of glance = 90° - 35° = 55°

━━━━━━━━━━━━━━━━━━━━

Answer:  D) 0-3 seconds

Explanation:

Answer:

Explanation:

option 1 - A and B move with the same speed INCORRECT because the lines have different slopes

option 2 - B moves with non-uniform speed  INCORRECT because the line for B is straight

option 3 - A completes his journey early INCORRECT because A ends his journey at about 11:45 after going about 42 km. B finishes his journey at about 11:35.

option 4 - B overtakes A at 11:10 a.m.  CORRECT.  They meet at the 30 km mark at 11:10, which is where the lines intersect.

Answer:

soory but i cant under stand it proper can explain

The final image is located 25 cm to the right of the concave mirror, overall magnification depends on calculations, and the final image is real.

To determine the location of the final image, we need to consider the properties of the converging lens and the concave mirror. Given that the object is 50 cm to the left of the lens, which has a focal length of 30 cm, we can use the lens formula (1/f = 1/v - 1/u) to find the image distance (v) from the lens.

Next, we consider the concave mirror, which is 25 cm to the right of the lens. We can use the mirror formula (1/f = 1/v + 1/u) to find the final image distance (v') from the mirror.

By combining the lens and mirror formulas, we can calculate the overall magnification (M) as the product of the magnification produced by the lens (m_lens = -v/u) and the magnification produced by the mirror (m_mirror = -v'/u). The negative sign indicates an inverted image.

Based on the calculations, we can determine the location of the final image relative to the original object, the overall magnification, and the character of the final image.

The positive distance of 25 cm to the right of the mirror indicates that the final image is formed on the same side as the object. The overall magnification is determined by multiplying the magnifications of the lens and mirror. Since the magnifications are both negative, the final image is inverted.

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Answer: False

Explanation:

Growing different crops in different seasons in the same field will deplete the soil of nutrients. False. Growing different crops In the same field actually help to improve the fertility of the field.

The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.

It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.

They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.

Haley noticed a small spot on her skin that turned out to be skin cancer.

Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.

Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.

The treatment most likely to use is Superficial External bean Radiation Therapy.

Then the correct option is B.

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Answer: As you already know people have cloned dolly sheep but what about people? will we be able to clone ourselves one day?. Good question, actually scientist believe it may be possible years from now, though it wouldn't be right if we didn't research. It is hard to clone animals let alone people which is probably one of the reason's some human's oppose it so much. Think of it this way though if we cloned ourselves or someone  clones us after we die it'll be like we never left. It will bring less heart-ship to people knowing can always have that person.  it will also make life more evolved in evolution and theory.

i couldn't think of anything else but her's a start :)

The moment of inertia (I) of the ring in Figure 10.1, with total mass m, inner radius r1, and outer radius r2 rotating about the axis shown, is I = (1/2) * m * (r1^2 + r2^2).

The moment of inertia is a measure of an object's resistance to changes in its rotational motion. For a thin ring rotating about an axis perpendicular to its plane, the moment of inertia can be calculated using the formula I = (1/2) * m * (r1^2 + r2^2), where m is the mass of the ring, r1 is the inner radius, and r2 is the outer radius.

In this case, we have a ring with total mass m, so the formula becomes I = (1/2) * m * (r1^2 + r2^2). By plugging in the given values, we can calculate the moment of inertia of the ring.

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The Planck equation and rules of direct proportions can be found that the amount of energy emitted by sodium the answer is;

              E = 2.2 10⁻¹³ J

Planck's equation establishes a relationship for the energy of photons

          E = h f

          c = λ f

          E = \(\frac{h \ c}{\lambda}\)

Where E is the energy, h the Planck constant (h = 6.63 10⁻³⁴ J s), f the frequency of radiation, c the speed of light and λ the wavelength

The energy emitted by each sodium atom is the energy of the emitted radiation that has a wavelength of 590 nm, two lines close together, indicate that each atom emits a photon, its energy is

             E₀ =  \(\frac{6.63 \ 10^{-34} \ 3 \ 10^8}{ 590 \ 10^{-9}}\)

             E₀ = 3.37 10⁻¹⁹ j

We look for the mass of a mole of sodium in the periodic table

             PM = 29.9897uma ( \(\frac{1.66 \ 10^{-17} kg}{1 una}\)) = 49.78 10⁻²⁷ kg

With a direct rule of proportions we can find the atoms of sodium in the lamp. If in mol of sodium it has a mass 49.78 10⁻²⁷ kg and has avogadro number 6.022 10²³ atoms. How many atoms are there in 45.8 10⁻⁹ kg

               # sodium atoms = \(\frac{49.78\ 10^{-27} \ 6.022 \ 10^{23}}{ 45.8 \ 10^{-9}}\)

               #_atom Sodium = 6.54 10⁵ Sodium atoms.

Let's use a direct ratio rule, If a sodium atom emits an energy Eo, how much energy do you emit? 6.54 105 atoms

              E = Eo  # _atmos / 1 atom

              E = 3.37 10⁻¹⁹ 6.54 10⁵

              E = 2.2 10⁻¹³ J

In conclusion, using the Planck equation and direct proportions rules we can find the amount of energy emitted by sodium, the answer is;

              E = 2.2 10⁻¹³ J

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Maximum overcurrent protection (MOP) is the most circuit breaker size required to shield the system. The maximum overcurrent safety is 41.053 A.

We know that for a three-phase transformer, the contemporary can be written as,

I = 3 - phase kV A / 1.73 x V

I = 25000 / 1.73 x 440

I = 32.84 A.

Now, the maximum overcurrent protection value is 25% above the present day, therefore, the most overcurrent safety can be written as,

I_Max = 125% of I

          = 1.25 x 32.84

          = 41.053 A

subsequently, the most overcurrent protection is 41.053 A.

Maximum Overcurrent Protection (MOP) refers to the maximum level of electrical current that is allowed to flow through an electrical system without causing damage. This protection is typically provided by overcurrent protection devices, such as circuit breakers and fuses, which are designed to automatically interrupt the flow of current in the event of an overcurrent situation.

MOP is an important safety feature in electrical systems, as it helps to prevent damage to electrical components and reduces the risk of fires and other safety hazards. The level of MOP is determined by the electrical codes and standards that apply to the particular system, and it is based on factors such as the type of electrical equipment used, the size of the conductors, and the type of insulation used.

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The magnetic field around a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire.

The magnetic field strength generated by a current-carrying wire follows the right-hand rule. As the current increases, the magnetic field strength also increases. This relationship is described by Ampere's law.

Additionally, the magnetic field strength decreases as the distance from the wire increases, following an inverse square law. This means that doubling the current will double the magnetic field strength, while doubling the distance from the wire will reduce the field strength to one-fourth of its original value. Therefore, the magnetic field around a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire.

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Answer:

This region of increasing temperatures is the stratosphere, spanning a pressure range from 100 millibars at its base to about 10 millibars at the stratopause, the top of the layer.

Explanation:

Answer:

zeros and ones

Explanation:

pls brainliest

The digital signals are generally in the form of zeros and ones.

The digital signals turn sounds into zeros and ones.

An electronic signal is transmitted as binary code that can be either the presence or absence of current, high and low voltages, or short pulses at a particular frequency. This signal is called a Digital Signal.

Digital signals take value in discrete form only at a given time.

Any digital signal can be converted into an analog signal with the help of a digital to analog converter.

If the sound signal is in the form of a digital signal, then it will turn the sound into the form of zeros and ones.

To know more about the digital signal, follow the link given below.

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vf = vi + at

vf = 0

a = - (to stop (deceleration))

input the value:

0 = 4 m/s -a.8

8a = 4

a = 0.5 m/s²

F = m.a

F = 75 kg x 0.5 m/s²

F = 37.5 N

Answer:

d. Two soccer balls that are touching each other

Explanation:

Let \(m_1\) be the mass of a tennis ball, \(m_2\) is the mass of a soccer ball.

As the mass of a soccer ball is more than the mass of a tennis ball, so

\(m_2 > m_1\)

Let \(d_1\) be the distance between the centers of both the balls near each other and \(d_2\) be the distance between the centers of both the balls touching each other.

So, \(d_2 > d_1\)

The gravitational force, F, between the two objects having masses M and m and separated by distance d is

\(F=\frac{GMm}{d^2}\)

Where G is the universal gravitational constant.

As, the gravitational force is directly proportional to the product of both the masses and inversely proportional to the square of the distance between them,  so selecting the larger mass (\(m_2\), soccer ball) separated by a lesser distance (\(d_2\), touching) to get more gravitational force.

Therefore, there will be a larger gravitational force between them when two soccer balls touching each other.

Hence, option (d) is correct.

Answer:

Two soccer balls that are touching each other

Explanation:

I got it right on the test.

The diameter size which means the area between partings is exactly the same as the diameter of the roller is a. 1/2.

A roller is a cylindrical device used to create curls or waves in hairdressing. Hair rollers come in various sizes and materials, with foam, velcro, and heated rollers being the most common. They come in a variety of sizes to accommodate various hair lengths and curl types. They're also a favorite of stylists since they can be used to build volume, body, and movement in hair.

When the diameter size is 1/2, the area between the partings (which are essentially gaps or spaces) is equal to the diameter of the roller. This can be visualized as the roller being divided into two equal parts, with one part being the diameter of the roller and the other part being the same diameter. Hence, the area between the partings is exactly the same as the diameter of the roller.

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Answer: the radial distance between the 500-v equipotential surface and the 1000 v surface will be 8.91*106 times the charge Q.

Explanation: To find the answer, we have to know more about the equipotential surfaces.

                            \(V=\frac{Qk}{r}\)  , where k is equal to 1/(4π∈₀) =\(8.99*10^9\) .

                          \(r_d=r_1-r_2\)

                   \(500V=\frac{Qk}{r_1} \\thus, r_1=\frac{Qk}{500V}= (1.79*10^7 *Q) m\)

                  \(1000V=\frac{Qk}{r_2}\\ r_2= \frac{Qk}{1000V} =(8.99*10^6*Q) m\)

                  \(r_d=1.79*10^7Q-8.99*10^6Q=(8.91*10^6*Q)m\)

Thus, we can conclude that, the radial distance between the equipotential surface of 500V and 1000V will be,8.91*106 times the charge Q.

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Isaac Newton was significant to the study of mathematics, physics, and optics. Hence, all of the choices are correct; option D

Sunlight is   mixture of all visible light; option A

Isaac Newton believed that light had properties of both particles and waves; False

Light waves are made of photons; option B

The type of electromagnetic waves that causes the most damage to living things is gamma rays; option C

An object that produces light because it has been heated is incandescent; option B

The most transparent object is bottled water; option B

The standard unit of brightness is called the candela; True

The direction of a reflected ray will always match its; None of the choices are correct.

Plane mirrors always follow the law of reflection; True

All light rays parallel to the optical axis of a concave mirror are reflected through the focal point; option B

Headlights on cars are made from convex mirrors; False

Concave mirrors are used in reflecting telescopes; True

A mirage is caused by the bending of light rays as they pass through air layers of different densities; True

Light refracts because it changes speed as it moves between media of different densities; option B

Lenses reflect light; option A

Images are formed on the retina of the eye; option C

The vitreous humor is the part of the eye that light strikes first; True

Lenses in the human eye do not change shape; False

Ultraviolet radiation is not helpful to humans, it is only harmful; False

Refraction of light is a phenomenon that occurs when light travels from a medium of less optical density to a medium of greater optical density or vice versa

The lens in the eye functions to refract light. Lenses can also reflect light.

Sunlight can be refracted or reflected. It contains light of all colors and is a form of electromagnetic radiation.

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An airplane passenger carries a 215 n suitcase up stairs a displacement of 4.20 m vertically and 1.60 m horizontally, then work done is zero.

In physics, work is a measure of the energy transfer that happens when an item is pushed across a length by an external force, at least a portion of which is supplied inside the direction of displacement. Work may be calculated if the forces are constant by multiplied the path's total length by the components of the force operating along the path.

The work done when the force is applied at an angle to the displacement is W = fd cos. Work on a person is conducted not just by moving the body in its entirety from one location to another. An airplane passenger carries a 215 n suitcase up stairs a displacement of 4.20 m vertically and 1.60 m horizontally, then work done is zero.

Therefore, the work done is zero.

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The acceleration of free fall on the planet is 3.6 m/s^2. The correct answer is option C.

Let's assume that acceleration of free fall on the planet is a.

Potential energy of stone at height 2.0m is given be,

mah = 2ma

Kinetic energy of stone just before reaching the surface of the planet is,

Kinetic energy = mv^2/2

v= 3.8 m/s

Kinetic energy = 7.22m

By law of conservation of energy, Kinetic energy will be equal to Potential energy, and we get;

2ma = 7.22m

a = 3.6 m/s^2

Hence, the acceleration of free fall on the planet is is 3.6 m/s^2. Option C is the correct answer.

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