SKETCHPAD
Two friends push with great force against a rock. One friend pushes to the right
with 15 N of force. The other friend pushes in the opposite direction with 15 N of
force. Label the forces in the picture below.

The wavelength in nanometers of light is 789 nm. The result is obtained by dividing the speed of light by the frequency.

Wavelength is the distance between the two successive crests or troughs of a wave. The wavelength of a light can be expressed as

λ = c/f

Where

The scientific data shows that the speed of light is 3 × 10⁸ m/s.

So, we get the wavelength by the formula above.

λ = c/f

λ = 3 × 10⁸/3.80 × 10¹⁴

λ = 0.789 × 10⁸⁻¹⁴

λ = 0.789 × 10⁻⁶ m

In nanometers (10⁻⁹), the wavelength is

λ = 789 × 10⁻³ × 10⁻⁶ m

λ = 789 × 10⁻⁹ m

λ = 789 nm

Hence, the wavelength of the light is 789 nanometers.

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All waves have a wavelength, frequency, speed, and amplitude, and they all share the same fundamental features of reflection, refraction, diffraction, and interference. Thus, option B is correct.

The height (amplitude), frequency, and length of a wave can all be used to characterize it. Any wave can be thought of as an energy-transferring disturbance.

Compared to mechanical waves, electromagnetic waves are different. The electromagnetic waves can move in vacuums since they have the ability, but sound waves and water cannot, so they require a medium to spread.

Electric and magnetic fields oscillate along with electromagnetic waves in a manner that is perpendicular to the direction of propagation.

therefore, Mechanical waves require a medium for propagation.

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The skateboarder touches down 3.8 meters from the end of the ramp while wheels roll out without friction.

Friction is the force that opposes motion between two surfaces that are in contact with each other. It arises because the microscopic roughness of the surfaces that are in contact, and the interlocking of their asperities causes a resistance to sliding or rolling motion.

Friction can be categorized into two types:

For example, it allows us to walk, run, and grip objects. However, friction can also cause problems, such as wearing down machinery and causing heat build-up.

Conservation of energy to be used to solve this problem.

At the top of the ramp, all the skateboarder's initial energy is in the form of kinetic energy, and at the bottom, all the energy is in the form of potential energy. Therefore:

[tex]1/2 * m * v^2 = m * g * h[/tex]

where m is the mass of the skateboarder, v is the initial velocity, g is the acceleration due to gravity[tex](9.81 m/s^2)[/tex], and h is the height of the ramp.

Solve this equation for the mass of the skateboarder:

[tex]m = (2 * h) / (g * sin^2(theta))[/tex]

where theta is the angle of the ramp (30 degrees).

Plugging in the given values,

[tex]m = (2 * 1.0 m) / (9.81 m/s^2 * sin^2(30 degrees)) = 2.2 kg[/tex]

Now that the mass of the skateboarder is known, use the kinematic equations to find the distance the skateboarder travels before touching down:

[tex]d = v^2 * sin(2*theta) / g[/tex]

Plugging in the given values

[tex]d = 7.0 m/s * sin(2 * 30 degrees) / (9.81 m/s^2) = 3.8 m[/tex]

Therefore, the skateboarder touches down 3.8 meters from the end of the ramp.

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I came across a query asking why a perfectly fitting pot's cover frequently sticks after cooking when it cools down. The solution manual responded that pressure drops off as the temperature rises.

The sole factor influencing the pot before it is heated during cooking is the atmospheric pressure and the food within the pot likewise depends on that pressure. Therefore, the pressure inside the pot is currently at its starting state. The pressure inside the pot rises as it becomes warmer. Temperature rises along with pressure when pressure rises. Boiling is not an isothermal process. Therefore, during the boiling process, if a substance's pressure increases, the temperature will likewise change. As a result, pressure and body temperature are directly related.

In third case, when the pan is covered with a heavy lid, the cooking time will be the shortest. The pressure in the pan is higher when lid is heavier. When pressure is high, the saturation temperature at which water begins to boil will also be high. Additionally, faster cooking results from greater boiling temperatures.

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The equation for pendulum motion is T = 2π√(l/g), where T represents the period of oscillation, l represents the length of the pendulum, and g represents the acceleration due to gravity.

A pendulum is a simple device consisting of a mass (known as the bob) suspended from a fixed point by a string or rod. When the bob is displaced from its resting position, it swings back and forth in a repetitive motion known as oscillation.

The period of oscillation (T) of a pendulum depends on its length (l) and the acceleration due to gravity (g). The longer the pendulum, the longer the period, and the greater the acceleration due to gravity, the shorter the period.

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The electric field created by sphere A will be much greater than the electric field created by sphere B because sphere A has a much higher surface charge density.

The magnitudes of the electric fields created by the two spheres at a radius of 4 cm will be different because they have different charge distributions.

A good conductor, such as sphere A, will distribute its charge evenly over its surface, so the electric field it creates will be proportional to the surface charge density. On the other hand, an insulator, such as sphere B, will have a uniform charge distribution throughout its volume, so the electric field it creates will be proportional to the volume charge density.

The electric field created by a charged sphere at a point outside the sphere can be calculated using the formula:

E = [tex]\mathrm{k \times Q / r^2}[/tex]

where k is the Coulomb constant, Q is the charge on the sphere, and r is the distance from the center of the sphere to the point where the electric field is being calculated.

Using this formula, we can calculate the electric field created by each of the spheres at a radius of 4 cm:

For sphere A:

[tex]\mathrm{E = k \times Q / (r^2) = k \times (2 x 10^-6) / (4^2 x 10^-2)^2 = k \times 2 / 16}[/tex]

For sphere B:

[tex]\mathrm{E = k \times Q / (4r)^2 = k \times (2 x 10^-6) / (4 x 5 x 10^-2)^2 = k \times 2 / 100}[/tex]

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When a substance lose an electron, it becomes positively charged. The dust particle will acquire positive charge when it losses electrons when it passes through the positively charged grid.

An atom contains equal number of electrons and protons. Hence, it possess no net charge and being neutral. When the atom lose or gain electrons it becomes ions.

When the atom lose one electron its number of protons dominates over that of electrons and it acquires a positive charge. When the atom gain an electron the reverse happen and it acquires a negative charge.

Here, the dust particle loses its electron to the positive grid thus it will gain a positive charge.  

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Answer:

Explanation:

where is the pic

We call a molecule that binds up excess hydrogen ions in a solution a "buffer."

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The weight of an object with a mass of 20 kilograms on a planet is 196N

The weight of an object can be calculated as the product of its mass and the acceleration due to gravity. On a planet with an acceleration of gravity of 9.8 m/s^2, the weight of an object with a mass of 20 kilograms can be calculated as follows:

Weight (W) = Mass (m) * Acceleration of gravity (g)

W = 20 kg * 9.8 m/s^2

W= 196 N

So, the weight of an object with a mass of 20 kilograms on a planet that has an acceleration of gravity of 9.8 m/s^2 is 196 N.

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In general, the most prevalent ways of electrical wire bonding are:

Soldering, Wire nuts, Crimping, Terminal blocks, Heat shrink tubing.

Soldering is the process of melting a metal alloy, such as tin or lead, onto wires to form a permanent, low-resistance link. Soldering is frequently used to join fragile or thin wires.

Wire nuts are twist-on connectors that are often used for connecting wires. They are available in a variety of sizes to accommodate various wire gauges and may be quickly removed if necessary.

Crimping is the process of pressing a metal connection onto a wire using a specific tool to produce a strong bond. This technique is frequently utilised in automotive and maritime applications.

Terminal blocks are used to join together many wires. They are made up of a metal strip and screws that keep the wires in place.

Heat shrink tubing is a form of plastic tubing that contracts when heated. It is useful for insulating and protecting splices and connectors.

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C. whether the creature had hard parts and how fast it was buried.

The process of turning an organism's remains into rock or into imprints inside sedimentary rock is known as fossil preservation. A fossilised dinosaur bone is not actually a bone when you look at it. You are staring at a rock that resembles a bone. Other minerals have displaced the minerals found in the bones of the dinosaur. Over millions of years, sedimentary material filled the voids and the bone transformed into rock.

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Each different signal in a 1H NMR spectrum represents a different type of hydrogen atom. Hydrogen atoms that are equivalent give the same signal.

In physics, the term "spectrum" refers to the variation in light intensity with wavelength or frequency. A spectroscope is a device created for visual spectral observation, while a spectrograph is a device that captures or maps spectra. Spectra can be categorized based on their types of origin, such as emission or absorption. All the radiations that are emitted by atoms or molecules make up an emission spectrum, whereas, in an absorption spectrum, some wavelengths of a continuous spectrum (light that contains all wavelengths) are absent because they have been absorbed by the medium through which the light has passed; these absent wavelengths are visible as dark lines or gaps.

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A 4.0-L balloon at 300 K is placed in a cooler at 245 K; the volume of the balloon after it has been in the cooler is 3.27 L, and the formulas are PV = nRT, which is an ideal gas law formula, and then by using V1/T1 = V2/T2, the answer is derived.

PV = nRT

(P = pressure, V = volume, n = number of moles of gas, R = ideal gas constant, T = temperature)

Suppose, the number of moles and pressure remain constant,

V1/T1 = V2/T2

(V1 = initial volume, T1 = initial temperature, V2 = final volume, T2 = final temperature)

After putting values,

V2 = (V1 x T2) / T1

V2 = (4.0 L x 245 K) / 300 K

V2 = 3.27 L

Hence, the volume of the balloon after it has been in the cooler is 3.27 L, and the formulas are PV = nRT, which is an ideal gas law formula.

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Direction of magnetic field of the conductor is towards left side of the page. Hence option D is correct.

Fleming's left hand rule in magnetism states that, hold the fore finger, middle finger and the thumb of the left hand in a mutually perpendicular position. The forefinger represents the direction of the magnetic field, middle finger represents the direction of the current and the thumb indicates the direction of magnetic force on the conductor.

Here,

The figure of a current carrying wire which is placed in a uniform magnetic field is given.

From the figure,

The direction of force and that of current of the conductor are given.

So,

The direction of force is given by the arrow pointing upwards to the page.

The direction of current is represented by the cross sign. The cross sign indicates that it is perpendicularly inwards to the plane of the page.

It is clear that the force and the  current are in a mutually perpendicular direction in the figure.

Applying Fleming's Left Hand Rule,

Holding the fingers such that the thumb pointing upwards of the page and middle finger towards inside of the page. So now the forefinger is directed towards left side of the page.

Therefore, the direction of magnetic field is towards the left of the page.

Hence,

Direction of magnetic field of the conductor is towards left side of the page.

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The voltage in each branch of the parallel circuit is 9.0 V.

A parallel circuit is a type of electrical circuit in which the components are arranged in such a way that they are connected to the same voltage source by separate branches.

In a parallel circuit, each component has its own individual path for electric current to flow, and the total current is equal to the sum of the currents flowing through each branch.

In a parallel circuit, the voltage across each component is the same, but the current through each component can be different.

V1 = V2 = V = 9.0 V

where;

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Answer:

Alternating Current is the current that reverses its direction at regular intervals.

Initial speed, u = 72 km/h

Initial speed, u = 72 km/hFinal speed, v = 0 km/h (since the car comes to rest)

Initial speed, u = 72 km/hFinal speed, v = 0 km/h (since the car comes to rest)Time, t = 25 s

Formula:

Formula:The acceleration of an object can be calculated using the formula:

[tex]a = \frac{(v - u)}{t} [/tex]

Where a is the acceleration, v is the final velocity, u is the initial velocity, and t is the time taken.

Converting the initial velocity to m/s:

u = 72 km/h = (72 × 1000) / (60 × 60) = 20 m/s

Converting the final velocity to m/s:

v = 0 km/h = (0 × 1000) / (60 × 60) = 0 m/s

Substituting the values in the formula:

a = (v - u) / t

a = (0 - 20) / 25

a = -0.8 m/s² (Note: the negative sign indicates that the car is decelerating)

[tex] PLEASE :\ MARK :\ ME :\ AS :\ BRAINLIEST [/tex]

The net torque about the pivot is -0.6Nm

Torque is defined as the perpendicular component of force \times distance from pivot point.

#Tnet = £Ti where £Ti is the torques from different applied forces.

T1 = 6N × 1.2 = 7.2N  (+ve, counterclockwise)

T2= -5.2N sin 30° 3m (-ve, clockwise)

= -7.8Nm

Tnet = T1+ T2

= 7.2-7.8

= - 0.6Nm

Hence, the total torque is -0.6Nm

What is torque?

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The total energy of the system would be the same regardless of the mass of the object. This is because the energy stored in a spring is a function of the displacement of the spring, and not the mass of the object.

Energy is the capacity to do work. It is the ability to cause change and can take many forms, such as kinetic, potential, thermal, chemical, electrical, nuclear, and gravitational energy. It is essential for life and is found in all parts of nature. Energy is used to power machines, create materials, and to generate electricity. It is also used to heat and cool buildings, to light homes, and to power vehicles. As energy is used, it is converted into another form, such as heat, light, or sound. While energy can be used up, it is never destroyed. It is always transferred or transformed.

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The nosepiece of the microscope carries three or four objective lenses.

The component of a microscope that houses the objective lenses is called a turret or rotating nosepiece (can be two or many). The rotation of the objective lenses and assistance in adjusting the magnification power is the crucial function of the nosepiece.

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Any condition that affects conduction system of the heart can cause disruptions in the electrical signals and result in erratic movements around the atria, which can lead to an irregular heartbeat.

The conduction system of the heart generates and coordinates the electrical signals that cause the heart muscle to contract, producing a normal heartbeat. Disruptions to this system can cause the electrical signals to move erratically around atria, leading to an irregular heartbeat.

These disruptions can occur due to several factors, including aging, heart disease, medications, electrolyte imbalances, and genetic factors. Any condition that interferes with normal functioning of conduction system can cause arrhythmias, as electrical signals are no longer coordinated and may move in a disorganized manner around the atria.

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To convert grams to moles, you need to divide the mass of the substance in grams by its molar mass, which is the mass of one mole of the substance.

The molar mass of a substance is calculated by adding up the atomic masses of all the atoms in its chemical formula.

The formula for converting grams to moles is:

moles = grams / molar mass

The molar mass of a substance is calculated by adding up the atomic masses of all the atoms in a molecule. The atomic masses are found on the periodic table of elements.

For example, the molar mass of water (H2O) is calculated as follows:

2 x the atomic mass of hydrogen (1.008) + 1 x the atomic mass of oxygen (15.999) = 18.015 g/mol

Molar mass is important in chemistry because it allows for the conversion of mass to moles and vice versa. This is useful in determining the amount of a substance needed for a chemical reaction, as well as calculating the concentration of a solution. Additionally, the molar mass can be used to determine the empirical and molecular formulas of a substance.

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The power of the lift motor is 330 Watts.

The work done by the lift motor can be calculated using the formula for work which is Work = Force x Distance,

where

In this case, the lifting force can be calculated as the gravitational force acting on the lift, which is given by the formula Force = mass x acceleration due to gravity. The acceleration due to gravity is 9.8 m/s^2

So the work done by the lift motor is:

Work = (200 kg) x (9.8 m/s^2) x (2 m) = 3960 Joules

The power of the lift motor can be calculated as the work done per unit time. In this case, the time taken was 0.2 minutes, which is equivalent to 0.2 x 60 = 12 seconds.

So the power of the lift motor is:

Power = Work / Time = 3960 Joules / 12 seconds = 330 Watts.

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The change in momentum during the 3.25s acceleration is 28,280 kg m/s.

The change in momentum of an object is given by the product of its mass and its change in velocity, which can be calculated using the equation:

Δp = m * Δv

Where Δp is the change in momentum, m is the mass of the object, and Δv is the change in velocity.

To find the change in velocity, we can use the equation:

v = v0 + at

Where v is the final velocity, v0 is the initial velocity, a is the acceleration, and t is the time interval.

Since the dragster is initially traveling at 35 km/h = 35 * 1000 / 3600 m/s = 9.72 m/s, we can plug in the values to find the final velocity:

v = 9.72 + (12.5)(3.25) = 45.07 m/s

Δv = v - v0 = 45.07 - 9.72 = 35.35 m/s

Now that we have the change in velocity, we can find the change in momentum:

Δp = m * Δv = 800 kg * 35.35 m/s = 28,280 kg m/s

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To increase drag force, the plane can have many flaps it can lift vertically, which will help it increase the drag on the airplane, which is useful to help the plane decelerate or roll

A drag force is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or between a fluid and a solid surface.

To increase drag force, the plane can have many flaps it can lift vertically, which will help it increase the drag on the airplane, which is useful to help the plane decelerate or roll. However, to decrease drag force, the plane needs to be streamlined, in a tear drop shape, but not so much so as to create too much friction drag.

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Ocean waves are considered a renewable resource.

Renewable resources are natural resources that can be replenished in a relatively short period of time. Unlike nonrenewable resources, such as fossil fuels, renewable resources are not depleted when used and can be replenished naturally. Ocean waves are generated by the wind and can be used to generate energy through wave energy converters, which convert the energy from the ocean waves into electricity. The use of ocean waves for energy generation is considered a renewable energy source because the wind that generates the waves is an endless resource.

Ocean waves are created by the wind blowing over the surface of the ocean, causing the water to move in a repeating pattern known as wave motion. The energy from the wind is transferred to the water, causing it to move up and down in a wave pattern. Ocean waves can vary in size and frequency, with larger waves having more energy and a greater potential for energy generation.

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Determine the visible light's wavelength at a frequency of health care - associated x 10 14 Hz. Answer: Given that light has a frequency of 6.24 x 10 14 Khz. We are aware that the speed of light is 3 x 10.

What is a wave's wavelength?

A description of the wave in space that is systematically equivalent to its frequency and governed by the physics of the phenomenon is the wavelength (also known as the wavenumber or wave vector). The lowest traveling wave solutions are sinusoids, and superposition can be used to create more complicated ones.

What distinguishes a wavelength from a comparable point?

Submitted by: Distance between the equivalent positions of two successive waves is known as the wavelength. Two things or particles that are in the same step., points that have performed identical fractions in their periodic motion—are referred to as "corresponding points."

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The difference in the results is -0.002 m. This means that the distance between the spark marks in Gaithersburg is slightly smaller than in Sidney.

To solve this problem,

d = (n/2) * c * (1/f)

where d is the distance between consecutive spark marks, n is the number of spark marks, c is the speed of light, and f is the frequency of the AC power source.

number of spark marks is the same, which is 25 - 1 = 24.

The only difference between the two experiments is the location, which affects the value of the gravitational acceleration g. The acceleration due to gravity is different in Sidney and Gaithersburg,

According to the data, the acceleration due to gravity in Sidney is 9.81 m/s^2, and in Gaithersburg it is 9.79 m/s^2.

Using these values,

d(Sidney) = (24/2) * 3.00E+8 m/s * (1/60 Hz) * (1/9.81 m/s^2) = 0.606 m

d(Gaithersburg) = (24/2) * 3.00E+8 m/s * (1/60 Hz) * (1/9.79 m/s^2) = 0.604 m

The difference between these distances is,

d(Gaithersburg) - d(Sidney) = 0.604 m - 0.606 m = -0.002 m

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The proposed fluid mechanics problem requires more information to compute the pressure in pipe B and the pressure head at Point C.

We must use the hydrostatic equation, the continuity equation, and the information about the specific gravity and pressure gauge reading provided in order to calculate for the pressure in pipe B and the pressure head at the top of the dome (Point C).

It is impossible to offer a conclusive solution to this issue without more details. The size of the tank and piping system, the height difference between various places, and the precise location and orientation of the pressure gauge are all details that would be necessary for a thorough estimate.

For this reason, further information is needed in order to solve the issue and determine the values for the pressure in pipe B and the pressure head at Point C.

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full question

A closed cylindrical tank filled with water has an hemispherical dome and is connected to an inverted piping system as shown in the figure. The liquid on the top part of the piping system has a specific gravity of .8 and the remaining parts of the system are filled with water. If the pressure gage reading at A is 60kPa determine.
- The pressure in pipe B
- The pressure head at the top of the dome (Point C)