The free-body diagram below represents the force of several vehicles driving across a bridge. Assume that the bridge is in static equilibrium and that it has zero weight, and solve for the unknown reaction force.

The net electric force on particle 2 is -21.7 N.

The net force on particle q₂ is determined by applying Coulomb's law of electrostatic force.

F = kq₁q₂ / r²

where;

The force  between particle 2 and particle 1 is calculated as;

F = -( 9 x 10⁹ x 8 x 10⁻⁶ x 3.5 x 10⁻⁶ ) / (0.1)²

F = - 25.2 N

The force  between particle 2 and particle 3 is calculated as;

F = ( 9 x 10⁹ x 2.5 x 10⁻⁶ x 3.5 x 10⁻⁶ ) / (0.15)²

F = 3.5 N

The net force on particle 2 = 3.5 N - 25.2 N = -21.7 N

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Note that the procedures taken in the experiment set up shown are:

• Measurement of the length of the ramp

• Measurement of the angle of inclination of the ramp

• Measurement of the time taken by the marble to roll down the ramp

Factors that could cause the students collected data to have uncertainty or error in the measurement in the procedures described above are:

• Error due to parallax:, This is as a result of not properly focusing on the measuring device, thereby recording wrong values of the data measured

• Improper calibration, ,of measuring devices used:, This may be as a result of the calibration not starting from the zero point

• Incorrect recording, of measurements

• Changes in environmental condition,, such as temperature, may affect the accuracy of the measuring devices

Certain behaviors and choices during this time can have significant impacts on later-life success are poor diet, lack of exercise, smoking and chronic stress.

Poor diet: Consuming a diet that is high in saturated fats, processed foods, and sugar can lead to weight gain, high blood pressure, and other chronic conditions that can have lasting effects on health.

Lack of exercise: Failing to exercise regularly can increase the risk of chronic diseases such as heart disease, diabetes, and certain cancers, which can impact the quality of life in later years.

Smoking: Smoking is a major risk factor for many chronic diseases, including heart disease, stroke, and lung cancer. Quitting smoking during midlife can significantly reduce the risk of these diseases.

Alcohol abuse: Drinking excessively can increase the risk of liver disease, heart disease, and other chronic health conditions that can negatively impact later-life success.

Chronic stress: Unmanaged stress can contribute to the development of mental health problems, such as anxiety and depression, as well as chronic physical health conditions, such as hypertension and heart disease.

By making healthy choices, managing stress, and maintaining positive perceptions and attitudes, individuals can increase their chances of achieving success in later life.

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Answer:

The student's velocity should be 3m/s.

Explanation:

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Answer:

zepto

Explanation:

The frequency of light with a wavelength of 655 nm is\(4.57 x 10^14 Hz\) and 515 nm is \(5.82 x 10^14\) Hz and  475 nm is\(6.31 x 10^14 Hz\)

The equation that links the speed of light to wavelength and frequency is

c = λν

Where, c = speed of lightλ = wavelengthν = frequency c is a constant of 2.998 x 10^8 m/s.

Calculating the frequency of light with a wavelength of

655 nm:λ = 655 nm = \(6.55 x 10^-7m\)

Using the above equation, we get

c = λνν = c/λ = \((2.998 x 10^8 m/s)/(6.55 x 10^-7m)ν = 4.57 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 655 nm is 4.57 x \(10^14 Hz.\)

Calculating the frequency of light with a wavelength of 515 nm:λ = 515 nm = \(5.15 x 10^-7m\)

Using the above equation, we get

c = λνν = c/λ =\((2.998 x 10^8 m/s)/(5.15 x 10^-7m)ν = 5.82 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 515 nm is 5.82 x \(10^14 Hz\).

Calculating the frequency of light with a wavelength of 475 nm:λ = 475 nm = \(4.75 x 10^-7\)m Using the above equation, we get

c = λνν = c/λ = \((2.998 x 10^8 m/s)/(4.75 x 10^-7m)ν = 6.31 x 10^14 Hz\)

Therefore, the frequency of light with a wavelength of 475 nm is 6.31 x \(10^14 Hz.\)

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According to the question, the resulting angular speed (in rad/s) of the disk is 0.38 rad/s.

Angular speed is the rate at which an object or particle rotates or revolves around a point or an axis. It is measured in radians per second or revolutions per minute. Angular speed is an important concept in mechanics, astrophysics, and engineering.

In this case, the angular momentum of the person is 47.0 kg×2.80 m/s×1.54 m = 186 kg m²/s.

Therefore, the change in angular momentum of the disk is equal to the angular momentum of the person, which is 186 kg m²/s.

Using the conservation of angular momentum equation, we can find the angular speed of the disk by rearranging the equation to get ω = (ΔL)/I.Therefore, the angular speed of the disk is ω = 186 kg m²/s/486 kg m² = 0.38 rad/s.

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A parallel circuit is an electrical circuit with more than one current path and all circuit components are connected between the same two sets of electrically common points. The current supplied by the source in a parallel circuit is equal to the sum of all branch currents in the circuit.

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Answer:

True

Explanation:

If an object is at rest it will stay at rest unless a force acts on it.

Explanation:

One way to save yourself and get to safety without any help on a frictionless frozen pond is to make use of the conservation of angular momentum. By spinning your body, you can create an angular momentum that can be used to propel yourself in the opposite direction.

To do this, you could start by extending your arms and legs outwards and then tucking them in towards your body. This will cause your body to start spinning in the opposite direction. By changing the position of your arms and legs, you can control the speed and direction of your spin.

As you spin, you can gradually increase the speed of your spin by tucking your arms and legs in closer to your body. This will cause your body to spin faster and faster, generating a larger angular momentum.

Once you have built up enough angular momentum, you can then extend your arms and legs outwards again to slow down and stop your spin. At this point, your body will be moving in the opposite direction to your initial spin, allowing you to glide across the ice without any external force.

By repeating this process, you can continue to generate angular momentum and propel yourself in the opposite direction until you reach safety. It may take some practice to master this technique, but with enough determination and persistence, it is possible to save yourself and get to safety without any help on a frictionless frozen pond.

Answer:

by using gravity to push off the floor

Explanation:

or by using ur own body heat to melt some of the ice around u

Answer:

Explanation:

You guys are rude just because she accidentally did the wrong pic dont mean you gotta be rude

this is the answer + im doing this test

No. The potential of a non-uniform charged sphere cannot be the same as that of a point charge.

The potential at any point in space is determined by the distribution of charge within the system, and a non-uniform charged sphere has a different charge distribution than a point charge.

A point charge has all of its charges concentrated at a single point, while a non-uniform charged sphere has charge distributed throughout its volume.

As a result, the electric field and potential will be different for these two systems, even if they have the same total charge. Therefore, the potential of a non-uniform charged sphere cannot be the same as that of a point charge.

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Answer:

c and b

Explanation:

hope this helped!

Answer:

Un objeto se encuentra en equilibrio físico si la fuerza neta que se le aplica es igual a 0.

En este caso solo se aplican fuerzas en el eje horizontal, por lo que las podremos sumar directamente.

La persona A aplica una fuerza:

Fa = -3N

La persona B aplica una fuerza:

Fb = 5N

La persona C aplica una fuerza Fc, la cual aún no conocemos.

Pero sabemos que la caja está en equilibrio físico, por lo que:

Fa + Fb + Fc = 0N

reemplazando los valores que conocemos, obtenemos:

-3N + 5N + Fc = 0N

Ahora podemos resolver esto para Fc, la fuerza que aplica la persona C.

Fc = 0N + 3N - 5N

Fc = -2N

Podemos concluir que la persona C aplica una fuerza horizontal de -2N

Organelles are specialized structures within cells that perform specific functions, such as energy production, protein synthesis, and waste removal.

Some examples of organelles include mitochondria, which produce energy for the cell, and ribosomes, which are involved in protein synthesis.

The size of cells can vary widely depending on the organism and the type of cell. For example, human cells can range from 10 to 30 micrometers in diameter, while bacterial cells are typically much smaller, ranging from 1 to 5 micrometers in diameter.

In summary, organelles are specialized structures within cells that perform specific functions, and the size of cells can vary widely depending on the organism and the type of cell.

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The radio waves travels between the two boxes and they were travelling through air,

In that way, the radio waves from box A to B through air, the box A will gets the signal, and then modulates, amplifies and then it send out radio waves. Through the air, Box B will captures, amplifies and demodulates radio waves.

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Answer:

The de Broglie wavelength will remain the same because it does not depend on temperature.

Explanation:

de Broglie wavelength of a particle is independent of the temperature and hence the properties of emitted particle such as photoelectric effect, radioactive radiation etc. does not depend on the temperature.

Also, until unless the kinetic energy of a moving particle is not driven by the

thermal energy, the de Broglie wavelength  is independent of the temperature

Explanation:

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Ohm's law is defined as the applied voltage (V) is directly proportional to the current flow (I) in the circuit. V =IR, where R is the resistance of the circuit that resists the current flow in the circuit, and the unit of resistance is the ohm.

From the given,

1) a) resistors in the circuit are connected in parallel, then the voltage in the circuit remains the same. The voltage across each resistor is 9V.

  b) the current in each resistor is given by, V=IR

I₁ = V/R₁ = 9/10kΩ=0.9mA.

I₂ = V/R₂ = 9/2kΩ = 4.5mA

I₃ = V/R₃ = 9/1kΩ = 9mA.

2) a) the resistances are connected in parallel, the effective resistance is 1/R(eff) = 1/R₁ + 1/R₂

1/R(eff) = 1/(100) + 1/(250)

           = 250+100/25000

          = 350/25000

          = 7/500

R₁(eff) = 500/7

1/R(eff) = 1/R₁ + 1/R₂

            = 1/350 + 1/200

            = 200+350/70000

            = 550/70000

            = 11/1400

R₂(eff) = 1400/11

Thus, the two effective resistances are connected in series,

R(e) = R₁(eff) + R₂(eff)

      = 500/7 + 1400/11

      = (500×11) + (1400×7)/77

      = 5500 + 9800 / 77

      = 15300/77

R(e) = 198 Ω.

B) total current, I = V/R

  I = 24 /198

   = 121mA.

3) a) the resistances are connected in series, the total resistance,

R(eff) = R₁ + R₂

         = 3+3

R(eff) = 6Ω

b)Current, I = V/R

I = 12/6

  = 2A

c)Power, P = I²R = 2×2×6

      P = 24W is the power in each bulb.

d) Power, P = VI = 12×2 = 24 W, is the power in battery.

4) a) the resistances are connected in parallel,

1/R(eff) = 1/R₁ + 1/R₂

           = 1/3 + 1/3

           = 2/3

R(eff) = 3/2Ω

b) In a parallel circuit, the voltage remains unchanged.

Voltage = 12V

c) Current, I = V/R

I₁ = V/R₁ = 12/3 = 4A

I₂ = V/R₂ = 12/3 = 4A.

d) power, P = I²R =4²3=48W.

e) Total current in the circuit, I = I₁+I₂

I = 4 + 4

 = 8A

f) power supplied by a battery, P = VI

P = 12×4 = 48 W.

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Answer:

below

Explanation:

sin a = 4/5

a = 53.1

tan theta = 3/4

theta = 36.89

Given,

The distances; a=30 m

b=60 m

Angles; θ=E25°S

α=E40°N

From the diagram, ∠A is given by,

On substituting the known values,

From the cos rule,

On substituting the known values,

Thus the total displacement of the boy is 77.6 m

Answer:

polystyrene is a good insulater so less heat will escape from the cup and it will keep it warm.

the cup helps it become more insulated

Situation (a) results in a zero net magnetic field at point P. Option 1 is correct.

In situation (a), the two wires are carrying currents in opposite directions. At point P, the magnetic field due to one wire will be in the opposite direction of the magnetic field due to the other wire. Since the two fields are equal in magnitude and opposite in direction, they cancel each other out, resulting in a net magnetic field of zero at point P.

In situations (b), (c), and (d), the currents are either in the same direction or the wires are at different distances from point P. In these situations, the magnetic fields due to the wires do not cancel each other out at point P, resulting in a nonzero net magnetic field. Therefore, only situation (a) gives rise to a zero net magnetic field at point P. Option 1 is correct.

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Answer:

F = 2.65 10⁻¹¹ N

Explanation:

The radiation pressure for a fully reflective surface is

          P = 2S / c

where S is the pointiing vector which is the energy per unit area,

          S = I = \(\frac{\ P_{prom} }{A}\)

the area of ​​a circle is

           A = π r² = π d²/4

           S = \(\frac{3.98 \ 10^{-3} }{ \frac{\pi \ 0.003^2 }{4} }\)

           S = 0.563 10⁻³ W / m2

let's calculate the pressure

           P = 2 0.563 10⁻³/3 108

           P = 0.3753 10⁻⁵  N / m²

this pressure exerts an upward force, the definition of pressures

           P = F / A

           F = P A

let's calculate

           F = 0.3753 10-5 π / 4 0.003²

           F = 2.65 10⁻¹¹ N

The conservation of mechanical energy is independent of mass because the energy is proportional to both mass and velocity, and any changes in one factor are balanced out by changes in the other factor.

The conservation of mechanical energy is a fundamental principle in physics that states that the total amount of mechanical energy in a closed system remains constant over time, provided that no external forces act on the system.

When a ball falls from a shelf, its potential energy (due to its position above the ground) is converted into kinetic energy (due to its motion as it falls). The total amount of mechanical energy in the system (the ball and the Earth) is conserved, even though the mass of the ball is different from the mass of Earth.

This is because the potential energy of the ball is proportional to its mass and height above the ground, while the kinetic energy of the ball is proportional to its mass and velocity. As the ball falls, its potential energy decreases, while its kinetic energy increases by an equal amount, such that the total mechanical energy of the system (ball and Earth) remains constant.

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Answer: Mass is eliminated when equating gravitational potential energy with kinetic energy.

Explanation:

14. None of these cases are velocity and the acceleration in the same direction at the instant.

15. I, II, and III of these cases are the velocity and acceleration in opposite directions at the instant

16. case I of these cases are the velocity and the net force perpendicular to each other at the instant.

If the velocity and acceleration are in the same direction (both have the same sign and both positive or negative), the object is accelerating. If the velocity and acceleration are opposite (with opposite signs), the object is slowing down.

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Answer: true

Explanation:

the ocean can change the temperature of land.

Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.

Answer:

True

Explanation:

Answer: hi your question is incomplete attached below is the complete question

answer :

Explanation:

Using the information provided in the question attached I will match each term with its corresponding meaning