A car travels a total distance of 99 meters in 3 seconds. Calculate the average speed ? *

Productivity increases when inputs decrease while outputs remain the same (option C).

Productivity refers to the efficiency and effectiveness of producing goods or services. It is a measure of how much output is generated per unit of input. When productivity increases, it means that more output is being produced with the same amount of input or resources.

In option C, inputs decrease while outputs remain the same. This implies that the same level of output is achieved with fewer resources or inputs. This indicates an improvement in efficiency and productivity. By reducing inputs while maintaining the same output level, a business can optimize its resource utilization and achieve higher productivity.

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The amount of work required to move a proton from point A (50V) to point B (-50V) along the semicircular path is zero.

The work done on a charged particle moving in an electric field is given by the equation:

Work = qΔV,

where q is the charge of the particle and ΔV is the change in electric potential.

In this case, the charge of the proton is constant (q = 1.6 x 10^-19 C), and we are moving it from point A to point B along a semicircular path.

Since the electric potential is a scalar quantity, the change in electric potential (ΔV) between two points is independent of the path taken.

Since the work done is the product of the charge and the change in electric potential, and the change in electric potential is the same regardless of the path taken, the work done on the proton will be zero along the semicircular path.

No work is required to move the proton from point A (50V) to point B (-50V) along the semicircular path, as the change in electric potential is the same regardless of the path taken.

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The answers include the following;

This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy.

The direction in which the heat flows is from hot chocolate to the vanilla ice cream and the kinetic energy of the hot chocolate decreases once you add the ice cream.

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Answer:

D) vaporisation and sublimation

Explanation:

Answer:

D

Explanation:

vaporization and sublimation

When the mass of the block is increased without changing the coefficient of kinetic friction, the following changes occur:
1. The force required to move the block increases.
2. The acceleration of the block decreases.
3. The distance traveled by the block in a given amount of time decreases.

The force required to move an object is directly proportional to its mass. Therefore, when the mass of the block is increased, the force required to move it also increases. However, the coefficient of kinetic friction remains the same, so the frictional force acting on the block remains constant.

According to Newton's second law of motion, the acceleration of an object is directly proportional to the force applied on it and inversely proportional to its mass. Since the force required to move the block has increased and its mass has also increased, the acceleration of the block decreases.

Finally, since the acceleration of the block has decreased, it covers a smaller distance in a given amount of time compared to when its mass was lower. This is because the distance traveled by an object is directly proportional to the square of its acceleration. Therefore, as the acceleration decreases, the distance traveled also decreases.

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What are the following statements?

The line does not go through the origin because there is some inherent delay in the heating process that is not dependent on the mass of water in the kettle.

Part (c) asks to suggest why the line on Figure 2 does not go through the origin. The line on Figure 2 represents the relationship between the mass of water in the kettle and the time taken for the kettle to switch off.

Boiling point refers to the temperature at which a liquid substance turns into a gas or vapor. The boiling point of a substance depends on various factors, such as its molecular structure, intermolecular forces, and atmospheric pressure.

The boiling point of a substance remains constant under a given pressure, and any additional heat input during boiling will only cause the temperature of the vapor to increase rather than the liquid. The boiling point is an important physical property of a substance, and it can be used to determine the purity of a liquid through the process of distillation. The boiling point of water is 100 degrees Celsius at standard atmospheric pressure (1 atm), while the boiling point of ethanol is 78.5 degrees Celsius.

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Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart

Explanation:

The Rock cycle is a model that describes the formation degradation, and regeneration of rocks as a result of sedimentation magma, and metamorphism. All rocks are made of minerals.

Rock circulation is the process by which rocks change continuously between three types igneous sedimentary and metamorphic. The three processes that transform one rock into another are crystallization, metamorphism erosion, and sedimentation. Any rock can be transformed into another rock by undergoing one or more of these processes. This creates a lock cycle.

Rock circulation is a fundamental concept that describes the transition between three rock types metamorphic igneous, and sedimentary rocks. Simply put it is a set of processes that create and transform rock types within the Earth's crust. Rock cycling by definition is the natural process by which sedimentary igneous, and metamorphic rocks are formed, transformed from one type to another, and destroyed.

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The minimum height of the loop without falling it off is 2.7(R-r).

What is height?

height is the measurement of someone or something .

Sol-It is given that capital art Israelis of loop. The loop. Small M. Is the mass of the marble. Small art is radius of the marble. We have to find minimum height edge. The track must have for the marble to make it around the loop. The loop without falling off coming to the solution. We have art is radius of solid marvel. Capital art is radius of circular, loop. Track moment of inertia of this is all in I is equal to two divided by five M. R squared. Thank you lad velocity of the marvel is equal. Do your makeup when the slides down the incline plane and regis the top of the loo. Let this be equation to and let this be equation three gain in potential energy related to center of mass is equal to mg. Multiplied by to capital R minus smaller. Let this be equation four. From law of conservation. Oh Nrg we have Equation one is equal to equation too plus equation three plus equation four substituting we have M G multiplied by H plus R is equal to half M V squared plus half I omega squared plus MG multiplied by two R -R. M G multiplied by H plus R. Is equal to half M B squared plus half. Multiplied by two divided by five M R squared. Omega square plus MG.

Hold square plus M G. Multiplied by two R minus R divide M G. On both sides we have H. Plus art Is equal to seven divided by 10, multiplied by R -R. Plus to r minus R. H plus odd as it will do 2.7 R -1.7 are therefore H is equal. Do 2.7 multiplied by R -R. Hence it can be concluded that height of the track. H is equal to 2.7 multiplied by R -R.

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Answer:

see below

Explanation:

1. density = mass / volume

2. kg/mL,  g/cm³

3. volume = mass / density

4. mass = density x volume

5.  

d = m / v

d = 32.9 g / 45.78 mL

d = 0.72 g/mL

6.

vol = m / d

vol = 0.62 g / 120g/cm³

vol = 0.00517 cm³

7.

m = v * d

m = 2.07 g/mL * 60.9 mL

m = 126.063 g

Newton's law of cooling relates the temperature of an object with the time. This law is the following:

Where:

Since we are asked to determien time we need to solve for "t". To do that we will subtract the temperature of the surrounding from both sides:

Now, we divide by the factor multiplying "e":

Now, we use natural logarithm on both sides:

Now, we use the following property of logarithms on the right side:

This means that we can lower the exponent, like this:

Now, we divide both sides by "-r":

Now, we substitute the values:

Solving the operations:

Therefore, the time to wait is 20.15 minutes.

Answer: no

Explanation: speed = rate of change of distance; distance/time

                     velocity = rate of change of displacement; displacement/time

Answer:

The height of the image of the candle is 20 cm.

Explanation:

Given that,

Size of the candle, h = 12 cm

Object distance from the candle, u = -6 cm

Focal length of converging lens, f = 15 cm

To find,

The height of the image of the candle.

Solution,

Firstly, we will find the image distance of the candle. Let it is equal to v. Using lens formula to find the image distance.

\(\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\)

v is image distance

\(\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{15}+\dfrac{1}{(-6)}\\\\v=-10\ cm\)

If h' is the height of the image. Magnification is given by :

\(m=\dfrac{h'}{h}=\dfrac{v}{u}\)

\(h'=\dfrac{vh}{u}\\\\h'=\dfrac{-10\times 12}{-6}\\\\h'=20\ cm\)

So, the height of the image of the candle is 20 cm.

Answer:

48

Explanation:

you basically divide 1200 into 25

The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.

When light beams from an object reflect off a mirror, they intersect with the picture of that thing, called an image. Real and virtual images are the two sorts of images.

The following parameters can be used to describe an image:

1. It is possible for an image to be real or virtual.

2. Left-right reversal is possible or not.

3. The image can be inverted or upright.

4. The image can be enlarged, shrunk, or made the same size as the object.

Plane mirrors provide virtual images that are upright, inverted left-right, the same distance from the mirror as the item, and the same size as the thing.

As a result, the best description of image production by a plane mirror is “a virtual picture is produced behind the mirror.”

The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.

Hence, option D is correct.

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Answer:    

Soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

Explanation:

Land surfaces absorb much more solar radiation than water. ... Water reflects most solar radiation that reaches its surface back to the atmosphere. Since land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy. Thus, land surfaces warm more quickly than water.

Hope this helps!     Thank you,

Soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

When solar radiation strikes the earth's surface, land surfaces absorb the energy differently than ocean surfaces. They both heat up and cool down at different speeds.

Water takes longer to heat than land, but once heated, it keeps its heat for a longer period of time.

Land surfaces absorb far more solar energy than water. The majority of solar energy that reaches the surface of the water is reflected back into the atmosphere.

Because land absorbs more solar radiation, the land surface retains more heat, as does vegetation. As a result, terrestrial surfaces warm faster than water.

Hence soil absorbs heat faster than sand, which absorbs heat faster than water. The air over Earth's surfaces absorbs heat from the materials of Earth.

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universal gravitation is usually started as the particle extracts every other particle in the universe with the force which is directly proportional to the product of masses and inversely proportional to the square of the distance between their centres.

After the collision the magnitude of the momentum of the system is Mv

Given:

mass of 1st object = M

speed of 1st object = v

mass of 2nd object = M

speed of 2nd object = 0

To Find:

magnitude of the momentum after collision

Solution: Product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.

Applying conservation of linear momentum

Mv + M(0) = 2MV

Mv = 2MV

V = v/2

So, after collision momentum is

p = 2MV = 2xMxv/2 = Mv

So, after collision momentum is Mv

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To calculate the potential energy (PE) of the bob at position B, we can use the formula PE = m × g × h, where m is the mass of the bob, g is the acceleration due to gravity, and h is the height.1.323 Joules of energy was transformed to thermal energy

Given:

Mass of the bob (m) = 0.3 kg

Acceleration due to gravity (g) = 9.8 m/s^2

Height at position B (h) = 0 meters (since it is at ground level)

Substituting these values into the formula, we have:

PE = 0.3 kg × 9.8 m/s^2 × 0 m

PE = 0 Joules

Therefore, the potential energy of the bob at position B is 0 Joules.

Next, we need to calculate the energy transformed to thermal energy when the bob swings back to its maximum height at position C.

Given:

Maximum height at position C (h) = 0.45 meters

Using the same formula, we can calculate the potential energy at position C:

PE = 0.3 kg × 9.8 m/s^2 × 0.45 m

PE = 1.323 Joules

Since energy is conserved in this system, the difference in potential energy between positions B and C represents the energy transformed to thermal energy. Therefore:

Energy transformed to thermal energy = PE at position C - PE at position B

Energy transformed to thermal energy = 1.323 Joules - 0 Joules

Energy transformed to thermal energy = 1.323 Joules

Therefore, 1.323 Joules of energy was transformed to thermal energy.

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Answer:

The possibility of Adenine=40% and Thymine=60% is only in single stranded DNA molecule. In the question, the DNA sample referred is a single stranded DNA. If guanine=10% as guanine will always pair with cytosine, i.e.cytosine is also 10% then adenine and thymine accounts 80% as adenine will always pair with thymine.

A molecule of DNA cannot contain 60% thymine because this amount will surpass 100% in consideration of its complementary base.

DNA or deoxyribonucleic acid is a biological molecule that stores genetic information in living cells.

DNA is a double stranded molecule that consists of nucleotide bases as follows:

According to Chargaff in his rule, the amount of adenine & thymine and guanine & cytosine in a DNA molecule is the same, which must equal 100% overall.

Therefore, if thymine is 60% in the DNA, adenine will also be 60%, which in total has already surpassed 100% without adding the other two bases.

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Answer:

Speed and direction affect pitch.

Answer:

The correct answer is B. Speed and Direction affect pitch

Explanation:

The Doppler effect, a quantitative analysis that demonstrates how the repetition heard by the stable perceiver depends on whether the perceiver sees the source approach, causes sound and light waves to increase and decrease in frequency due to the proportional motion between the wave source and its receivers. Accordingly, when the wave source is moving, waves are perceived at frequencies that are different from one another.

I know I'm answering a little later, but this will help any people in the future.

Please 5 star and say thx ty and hopes this helps

Answer: B is the correct answer because if you look, it takes P a longer time to get somewhere while it takes R a shorter time to get somewhere.

At t=0 a grinding wheel has an angular velocity, the wheel turned through a total angle of approximately: 501.21 radians between t=0 and the time it stopped.

To find the total angle through which the wheel turned between t=0 and the time it stopped, we need to consider two parts: the angle covered during constant angular acceleration, and the angle covered while coasting to a stop.

1. During constant angular acceleration:
At t=0, the angular velocity is 21.0 rad/s, and the angular acceleration is 26.0 rad/s². The circuit breaker trips at t=2.10 s. Using the equation θ1 = ω0t + 0.5αt², we can find the angle covered during this time:

θ1 = (21.0 rad/s)(2.10 s) + 0.5(26.0 rad/s²)(2.10 s)²
θ1 ≈ 63.21 rad

2. While coasting to a stop:
After the circuit breaker trips, the wheel turns through an angle of 438 rad as it coasts to a stop at constant angular acceleration. This means θ2 = 438 rad.

To find the total angle through which the wheel turned, simply add θ1 and θ2:

Total angle = θ1 + θ2 = 63.21 rad + 438 rad ≈ 501.21 rad

Therefore, the wheel turned through a total angle of approximately 501.21 radians between t=0 and the time it stopped.

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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.

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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.

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Gravitational force between two cars are 2.92 × 10 ⁻¹¹ Nm²/kg.

The universal force of attraction happened between two objects is called as gravitational force.

The mass of the two cars, m₁ = 2565 kg

                                            m₂ = 4264 kg

                                             r = 5m

                                            G = 6.67 ₓ 10 ⁻11 Nm²/kg

How gravitational force can be calculated?

Definition of gravitational force: The force of attraction between any two bodies is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

                            F ∝ m₁ m₂ ÷ r²

where the force exerted between the two masses m₁ and m₂,

                            F = G (m₁ m₂) ÷ r²

where as,  F - Gravitational force between two bodies,

                 G - Gravitational constant,

                 m₁ - mass of the first body,

                m₂ - mass of the second body,

                r² - square of the distance between two bodies.

                        F= 6.67 × 10⁻¹¹ Nm²/kg ( 2565 kg × 4264 kg) ÷ ( 5²)

         Hence,

                         F = 2.92 × 10⁻⁵ N

Option D is correct answer.

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The connection that requires transformers with two secondary windings providing equal voltages is called a center-tapped transformer configuration.

Center-tapped transformers have a primary winding and two secondary windings with a common center tap, which divides the secondary windings into two equal halves, this configuration is commonly used in various electronic and electrical applications. Center-tapped transformers offer several benefits, such as providing balanced voltages for applications like audio amplifiers and power supplies. They can also be used to generate two different voltage levels, allowing for greater flexibility in electronic circuits.

Additionally, center-tapped transformers enable the creation of a virtual ground or a reference point, which is essential in certain applications like push-pull amplifiers. In summary, center-tapped transformers with two secondary windings that provide equal voltages are essential for specific electronic and electrical applications, offering advantages like balanced voltage output, flexibility in voltage levels, and the creation of a virtual ground.

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Answer:

90 km / hr

Explanation:

V = S / t = 60 * 3.6 km / 2.4 hr = 90 km / hr

Hope that helps <3

Answer:

A. Constructive

B. Destructive

C. Destructive

D. Constructive

Explanation:

Constructive interference takes place at locations along the path of two superposed waves where the waves are in phase such that a high or low point of one of the waves corresponds with a high or low point of the other wave which gives a resulting wave amplitude which is the sum of the amplitudes of the individual waves

Destructive interference takes place at locations along the path of two superposed waves where one wave is out of phase with the other wave such that a high or low point of one of the waves coincides with a low or high point of the other wave respectively thereby cancelling the effect of the other wave and giving a resulting wave that has an amplitude which is the difference in the amplitudes of the individual waves

Therefore;

At point A, the peak of each wave partially coincides resulting in constructive interference

At point B, the peak of the blue wave and the trough of the red wave partially coincides resulting in destructive interference

At point C, the through of the blue wave and the peak of the back wave partially coincides resulting in destructive interference

At point D, the trough of each wave partially coincides resulting in constructive interference.