two tuning forks are sounded at the same time. which tuning forks will give rise to a beat frequency of 20 hz 20 hz when sounded together with a 240 hz 240 hz tuning fork?

Answer:

At point A. it gets kinda loud then at point B. it gets very loud than at point C. it gets quieter than at point D. it gets more silent.

Explanation:

Because you can tell when the waves get large it gets louder and then when the waves get more far apart then it get more quiet. Hope this helped!

We know that the coefficient of static friction between the floor of a truck and a box = μ = 0.29.

Truck is traveling at 68.2 km/hr (v), where v is the velocity of the truck.

Let us now find the least distance in which the truck can stop and ensure that the box does not slide by:

                d = v² / 2μgd

        where v = velocity, μ = coefficient of static friction and g = acceleration due to gravity

                             = 168.47 meters.

Hence the least distance in which the truck can stop and ensure that the box does not slide is 168.47 meters.

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Answer:

The speed of the car 6 s after starting to move is 12 m/s.

Explanation:

A car started from rest and moved along a straight road with constant acceleration of \(2\ m/s^2\) for 6 seconds.

It is required to find the speed of the car 6 s after starting to move. Let v is the final speed of the car.

The relation between speed, acceleration and time is given by :

\(v=u+at\)

u = 0

\(v=at\\\\v=2\ m/s^2\times 6\ s\\\\v=12\ m/s\)

So, the speed of the car 6 s after starting to move is 12 m/s.

Answer:

B. The refridgerant

Explanation:

this allows the refrigerant to absorb or release heat

Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission. The correct answer is d.

Placing the lasing material between the two mirrors of an optical cavity allows the photons to bounce back and forth through the lasing medium, increasing the probability of stimulated emission and amplifying the light to produce a laser beam. This process is essential for the sustained laser action. The Pauli exclusion principle and energy quantization may be relevant to the behavior of atoms and electrons in the lasing material, but they do not directly explain the need for an optical cavity. The uncertainty principle and thin-film interference are also not directly related to the function of an optical cavity in laser operation.
To sustain laser action, it is usually necessary to place the lasing material between the two mirrors of an optical cavity because:
d. Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission.

The optical cavity allows photons to travel back and forth through the lasing medium, increasing the chances of interacting with excited atoms and causing stimulated emission. This process amplifies the light, leading to the production of a coherent laser beam.

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Answer:

The change in the car's potential energy is approximately 3,615,124 joules.

The change in the car's potential energy can be calculated using the formula:

ΔPE = m * g * h

where:

ΔPE = change in potential energy

m = mass of the car (1210 kg)

g = acceleration due to gravity (approximately 9.8 m/s²)

h = change in height

In this case, the change in height can be determined by calculating the vertical displacement of the car as it travels up the incline.

The vertical displacement (h) can be calculated as:

h = d * sin(θ)

where:

d = distance traveled along the incline (1.20 km = 1200 m)

θ = angle of the incline (15°)

Substituting the values:

h = 1200 m * sin(15°)

h ≈ 308.41 m

Now, we can calculate the change in potential energy:

ΔPE = (1210 kg) * (9.8 m/s²) * (308.41 m)

ΔPE ≈ 3,615,124 J (joules)

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Answer:

B

Explanation:

Gravity, the attractive force between all masses, is what keeps the planets in orbit. Newton’s universal law of gravitation relates the gravitational force to mass and distance

The force of gravity is what gives us our sense of weight. Unlike mass, which is constant, weight can vary depending on the force of gravity (or acceleration) you feel. When Kepler’s laws are reexamined in the light of Newton’s gravitational law, it becomes clear that the masses of both objects are important for the third law, which becomes a3 = (M1+ M2) × P2. Mutual gravitational effects permit us to calculate the masses of astronomical objects, from comets to galaxies.

Answer:

35 degrees

Explanation:

The incident angle, an 80-degree angle, and as the angle of incidence increases, the amount of refraction also increases. So, we can expect a significant change in the angle of refraction from blue to red light at an 80-degree angle of incidence.

Refraction refers to the bending of light when it passes from different mediums.The amount of refraction that occurs at an interface between two materials depends on the wavelength of light, the angle of incidence, and the properties of the materials. The relationship between these factors is described by Snell's law:

n1 sinθ1 = n2 sinθ2

where n1 and n2 are the refractive indices of the two materials, θ1 is the angle of incidence, and θ2 is the angle of refraction.

For a given angle of incidence, the amount of refraction that occurs is greater for shorter wavelengths (i.e., blue light) than for longer wavelengths (i.e., red light). This effect is known as dispersion, and it is why we see rainbows when sunlight is refracted through water droplets.

In the absence of any information about the properties of the materials involved, we can assume that the amount of refraction will increase as the wavelength decreases.

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The specific heat capacity of the metal is 32427.7 J/kg/°C if the mass of a metal is 50 gm.

The specific heat capacity of a substance is the heat required to increase the temperature of the substance of unit mass by one degree. Its SI unit is J/kg/°C.

Mass of the metal= 50 g= 0.05 kg

Temperature of the metal = 100°C

Mass of the water = 200 g = 0.2 kg

Mass of the calorimeter = 80 g =0.08 kg

Temperature of the calorimeter and water combined= 14°C

Equilibrium temperature = 70°C

Specific heat capacity of the copper = 390 J/kg/°C

Specific heat capacity of the water = 4187 J/kg/°C

Heat lost by the metal = heat absorbed by the water and calorimeter

0.05×S×(100-70) = (0.2×4187+0.08+390) × (70-14)

1.5×S = 48641.6

S= 32427.73 J/Kg/°C

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Answer:

12.39m/s²

Explanation:

use the formula a=v-u

t

The length of the x-component of the vector is approximately 48.55 units.

To find the length of the x-component of the vector, we need to use trigonometry.

We can use the angle and the magnitude (length) of the vector to find the x-component using the formula:

x-component = magnitude x cos(angle)

Plugging in the values given, we get:

x-component = 52 units x cos(21⁰)

x-component = 52 units x 0.9336

Multiplying these two numbers, we get:

x-component ≈ 48.55 units

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Answer: The answer is C.

Explanation:Just took the quiz

The statement about the relationship between rates of reaction and concentration of reactants true is reactions are slower when there is lower concentration of reactants.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

Oxygen is needed for the reactions that cause artifacts to decay in the ocean.

Some ancient shipwrecks have been well-preserved deep in the ocean.

Reviewing the information in the data table, we conclude that reactions are slower when there is lower concentration of reactants.

Thus, the correct option is C.

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Physical and chemical qualities are present in all matter.

Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample).

Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples.

Extensive or intensive physical properties are both possible. The substance's extensive attributes, such as mass, weight, and size, change with the amount present.

Therefore, Physical and chemical qualities are present in all matter.

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The device that converts chemical energy into electrical energy is a battery.

On the other hand, the resistor is a passive element that is mainly used to limit the current in a circuit.

A resistor doesn't convert chemical energy into electrical energy.

Therefore, we can conclude that the given statement is false

Answer:

First of all, what is acceleration? — Acceleration is the rate of change of velocity per unit of time.

Now, we know that velocity is a vector quantity i.e we need both magnitude and direction to define it and so is acceleration. We can now say that in acceleration, the direction of motion is very important or to define acceleration we need both the magnitude of motion (here it is the speed) and its direction.

Now coming to your question. There are two possible answers to this question.

more

,Case 2 — When the body is not moving in a straight line or is constantly changing its direction. In this cas the speed still is constant but the direction is constantly changing, for example in the case of a circular motion the direction of motion constantly changes (the direction of a moving body in a circular path at any point is the direction of the tangent of the circle at that point). Hence the velocity changes as the body move along the circular or curved path.

Now, as  I earlier mentioned to define acceleration we need to know it's magnitude and it's direction, and acceleration is the rate of change of velocity per unit of time — the speed remaining constant the direction constantly changing, and the velocity changes at different time intervals or rate of change of velocity is ≠ 0 unlike in case 1. Since there is the of and a change in velocity (speed constant but the direction is changing) there is some acceleration.

To sum everything up — in the case of linear motion i.e motion in a straight line when the speed is constant and direction is not changing, velocity will be zero and hence acceleration would be zero. In case of a non-linear motion i.e motion not in a straight line, in a circle or any path where the speed is constant but the direction is constantly changing, velocity will not be zero and hence the acceleration would not be equal to zero. Either it would be greater or less than zero.

Answer:

P = E / t      definition of power

P = (1/2 m v2^2 - 1/2 m v1^2) / t

P = m / (2 * t) * (v2^2 - v1^2)

P = 1300 kg / 6 sec * (17.9^2 - 13.4^2)

P = 217 * 141 = 30,600 J/sec

The power required to pass the slow-moving truck is 34,905 watts.

Power is a physical quantity that measures the rate at which work is done or energy is transferred. It is defined as the amount of energy transferred or work done per unit time. The SI unit of power is watts (W), which is equivalent to joules per second (J/s).

In simpler terms, power is the rate at which energy is used or work is done. It is a measure of how quickly something can accomplish a certain task or transfer energy. The greater the power of a system, the faster it can perform a given amount of work.

Power = Work done / time taken = Force x distance/time taken

Here in the Question,

To calculate the power required to pass the slow-moving truck, we need to use the formula:

Power = Force x Velocity

where Force is the net force acting on the car and Velocity is the final velocity of the car after acceleration.

To find the force, we can use Newton's second law of motion:

Force = mass x acceleration

where mass is the mass of the car and acceleration is the change in velocity over time.

Given:

Initial velocity, u = 13.4 m/s

Final velocity, v = 17.9 m/s

Time, t = 3 s

Mass of car, m = 1300 kg

The acceleration can be calculated using the formula:

Acceleration = (Final velocity - Initial velocity) / Time

Acceleration = (17.9 m/s - 13.4 m/s) / 3 s

Acceleration = 1.5 m/s^2

Now we can calculate the force:

Force = mass x acceleration

Force = 1300 kg x 1.5 m/s^2

Force = 1950 N

Finally, we can calculate the power required to pass:

Power = Force x Velocity

Power = 1950 N x 17.9 m/s

Power = 34,905 W

Therefore, the power required to pass the slow-moving truck is 34,905 watts (or approximately 35 kW).

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In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.

hope this helped

Answer:

Ok, as the gas starts to cool down, the kinetic energy of the particles starts to decrease, so the first thing that happens is:

"the gas loses thermal energy" (as the gas cools down, the temperature decreases, so it loses thermal energy)

Now, the kinetic energy must decrease, so now:

"the particles of gas move slower".

Then, as the particles start to move slower, they start to get closer to eachother, then we have:

"The space between the gas particles decreases."

As the particles start to get close to eachother, the density of the gas starts to increase, until a point where we get to the condensation point, here we have a change of phase and the gas changes to a liquid, so here we have:

"The gas changes to a liquid."

Answer:

a

Explanation:

Answer:

Put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating. Or if you want to be easy but messy, add dry ice to a bowl of water and watch how the water starts to boil.

Given data:

The mass of the ball is m=0.25 kg.

The spring constant is k=100 N/m.

The speed of the ball is v=6.8 m/s.

The amount of energy stored in the spring in the form of elastic potential energy will equal to the kinetic energy of the ball. It can be applied as,

Here, x is the compression in the spring.

Substitute the given values in above equation,

Thus, the initial compression of the spring is 0.34 m.

The minimum allowed length for the runway is  1170m.

a=3.30m/s2 is the acceleration of the plane

v=88.0 m/s is the final velocity of the plane

u=0m /s is the initial velocity of the plane

The acceleration of the object is the slope of the v-t graph, therefore,

Slope=Change in y component / Change in the x component

a = u- v / T f - T i

T f - T i =  v/a

T f - T i = 88/3.3

T f - T i = 26.67 s

The displacement,

d=1/2 b h

d=1/2(T f - T i ) * v

d = 1/2 * 26.67 s * 88.0 m / s

d = 1173.33

   = 1170m nearest three significant figures

Hence, the minimum allowed length for the runway is 1170m answers.

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Answer: 60

Explanation: if u hit it it will have impact and the impact added 10n

Answer:

Yes you  worked

Explanation:

You may have not seen a good outcome but you did put effort in.

When a force is applied on the car and it doesn't move then it simply means

work wasn't done.

The formula for work is given below:

Work = Force ₓ Displacement

For work to have been done , the applied force must cause the object to

change its position(displacement).

In situations where the force applied doesn't cause a change in position then work can't be calculated. This means no work was done on the car despite the applied force causing him to be tired.

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If the temperature becomes double, the total radiant energy becomes 16 times of the initial value

stefan Boltzman's law. state that According to the Stefan-Boltzmann law, the total radiant heat power emitted by a surface is proportional to the fourth power of its absolute temperature

the total radiant Object energy emitted by is directly Propotional to the fourth Power of its temperature. the

The Stefan-Boltzmann law expresses the power radiated by a black body as a function of temperature. The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body across all wavelengths per unit time jstar (also known as the black-body radiant emittance) is directly proportional to the fourth power of the thermodynamic temperature T of the black body.

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Answer:

627.2 N

Explanation:

The Normal Force (N) is the force the ground exerts on the sled, which is equal to the weight (W) of the sled.  These forces act in the y direction.  The other forces, Tension, Applied Force, Force of Friction all act in the x direction.

N = W = mg = (64.0 kg)(9.8 m/s²) = 627.2 N

The amount of color in water should be less than 5 color units. The amount of color in water is measured in color units (CU) and indicates the level of organic material present in the water. The correct answer is a.

The maximum allowable color level in drinking water is typically set by regulatory agencies and may vary depending on the source and treatment process. However, in general, the amount of color in water should be less than 5 color units to ensure that the water is aesthetically pleasing and does not contain excessive amounts of organic material.

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If we apply same force  to both-an apple or a couch, the object which will accelerate less is couch.

What is acceleration?

Acceleration is the term used to describe the pace at which speed and direction of velocity vary over time. Something is said to be accelerating when it starts to move faster or slower. Even when the speed is constant, motion on a circle accelerates because the direction is always keeps shifting. Both impacts cause all other motions to speed up.

The couch will accelerate less because

F = m a

where, F = force, m = mass, a = acceleration.

This equation can also be written as

a = F/m

It tells us that the acceleration is inversely proportional to mass.

so, in the question given the mass of couch will greater as compared to an apple so the acceleration of the couch will be lesser as compared to apple.

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