find the net force on a 30.0 nc charge located at the origin by two other charges. one is -50.0 nc located at (-5.0 m, 2.0 m) and 40.0 nc located at (3.0 m, 1.0 m).

Answer:

its z trust me

Explanation:

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Answer:b:kilowatts

Explanation:

The downtown is 5 miles far away, if the car travels at 10 miles / hour for 0.5 hours.

v = d / t

v = Velocity

d = Distance

t = Time

v = 10 mi / hr

t = 0.5 hr

d = v * t

d = 10 * 0.5

d = 5 mi

Velocity of the car is the rate of change of position of the car. In simple words it can be said as velocity is used to calculate the distance covered in a given amount of time.

Therefore, the downtown is 5 miles far.

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When the north pole is tilted toward the sun, the southern hemisphere has the fewest hours of daylight due to winter season in it.

When the North Pole is tilted toward the sun, the Northern Hemisphere has the most hours of daylight while on the other hand, the Southern Hemisphere has the least hours of daylight.

So we can conclude that When the north pole is tilted toward the sun, the southern hemisphere has the fewest hours of daylight due to winter season in it.

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Answer:

1.2 meters

Explanation:

The work done by a force of a particular magnitude is defined as the product of the force in the direction of the displacement of the object and the magnitude of this displacement. Work done can be calculated by multiplying Force and Distance in the direction of force as follows.

W = F × d

W = work (J),

F = force (N),

d = shift or displacement (m).

Answer:

Hooke's law can be written as:

F = -k*Δx

Where k is a constant that depends on the spring, called the spring constant.

And Δx = (x - x₀) is the displacement of the spring with respect to the rest position x₀

And a proportional equation is something like:

y = c*x

Where c is a constant of proportionality.

In the case of Hooke's law, the constant is K, then the force is proportional to the displacement of the spring with respect to the rest position Δx.

The types of energy that move through the system are as follows: potential energy, kinetic energy, mechanical energy, and electrical energy.The water stored in the dams contains potential energy.

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Hope it helps.

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If a car, starting from rest, accelerates at 4.0 m / sec², then its velocity at the end of 8.0 seconds would be 32.0 meters per second.

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem if a car, starting from rest, accelerates at 4.0 m / sec ² , then we have to find its velocity at the end of 8.0 seconds,

By using the first equation of the motion to calculate the velocity of the car after 8.0 seconds.

v = u + a × t

  = 0 + 4.0 × 8.0

  = 0 + 32.0

   = 32.0 m / s

Thus, If a car, starting from rest, accelerates at 4.0 m / sec², then its velocity at the end of 8.0 seconds would be 32.0 meters per second.

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Answer:

c

Explanation:

a, b, and d are examples of moving forward

while c is moving backwards.

Answer:

K.E=1/2m*v^2

2*K.E/v^2=m

Mass=32×2/(4)^2

Mass=64/16

Mass=4kg

Explanation:

Answer:

15 kg ball

Explanation:

Answer:

F = 300 N

Explanation:

This is an example of Newton's second Law

F = m * a

F = ?

m = 15 kg

a = 20 m^2

F = 20 * 15

F = 300 Newtons.

The height attained is 4.13 m and we do not need to know the mass of the cart to solve the question.

The term mechanical energy refers to energy possessed by a body by virtue of its position or its state of motion. There are two kinds of mechanical energy which are;

For the question, kinetic energy is equal to potential energy hence;

mgh = 1/2 mv^2

We can cancel out m on both sides such that

gh =1/2v^2

h = 0.5v^2/g

h = 0.5(9)^2/9.8

h =4.13 m

We do not need to know the mass of the cart to solve the problem.

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The maximum speed of electrons is 5.28 × 10⁵ m/s and the Work function is 3.34 × 10⁻¹⁹ J.

We have,

The wavelength of incident light = 420 nm

Stopping potential = 0.660 V

Here, we have to calculate the maximum speed of emitted electrons, the work function, and the metal. 

The stopping potential is given by the equation,

eV₀ = (E)Kinetic(max) + work function

v₀= √{2(E)kinetic(max)/m}

v₀= √2e(V₀)/m

work function= hν - eV₀

Where 'e' is the charge on an electron, 'm' is the mass of an electron, V₀ is the stopping potential, and 'ν' is the frequency of the light source.

Here we have,

λ= 420 nm

ν= (c)/λ

= (3.0 × 10⁸ m/s)/(420 × 10⁻⁹ m)

ν= 7.14 × 10¹⁴ Hz

h = 6.63 × 10⁻³⁴ Js

e = 1.60 × 10⁻¹⁹ C

m = 9.11 × 10⁻³¹ kg

V₀= 0.660 V

v₀= √(2 × e × V₀)/m

v₀ = √[(2 × 1.60 × 10⁻¹⁹ C × 0.660 V)/(9.11 × 10⁻³¹ kg)]

v₀ = 5.28 × 10⁵ m/s

Work function= hν - eV₀

Work function= (6.63 × 10⁻³⁴ Js × 7.14 × 10¹⁴ Hz) - (1.60 × 10⁻¹⁹ C × 0.660 V)

Work function= 3.34 × 10⁻¹⁹ J

For metal identification, we need to compare the work function with the known work functions of metals. For Sodium (Na), the work function is 2.75 eV = 4.4 × 10⁻¹⁹ J, which is less than the calculated work function, indicating that the metal is not Sodium.

Hence, we cannot identify the metal with the given data. The maximum speed of emitted electrons is 5.28 × 10⁵ m/s and the work function is 3.34 × 10⁻¹⁹ J.

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Cause: Energy transferred over time Effect: Power When energy is transferred over time, it results in the generation of power. Power is the rate at which work is done or energy is transferred, per unit of time.

The more energy that is transferred over time, the greater the power generated. Cause: Force applied to an object to change its position. Effect: Motion

When a force is applied to an object, it causes the object to move. Motion is a change in an object's position over time. The greater the force applied to the object, the greater the acceleration produced, and the faster the object will move.

Cause: Force moving an object over a distance

Effect: Work

When a force moves an object over a distance, it results in the generation of work. Work is the energy transferred to or from an object when a force is applied over a distance. The more force that is applied over a distance, the more work is done.

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Cause:-Energy transferred over time,Force applied to an object to change its position,Force moving an object over a distance

Effect:Power,Work,Motion

The Explanation are given as follows :-

Power is the rate at which work is done, or the amount of energy transferred over time. When energy is transferred over time, it can be used to perform work at a certain rate, which is power.

Work is the energy transferred when a force is applied to an object to change its position. When a force is applied to an object, work is done to move the object over a certain distance.

Motion is the change in position of an object over time due to a force moving it over a certain distance. When a force is applied to an object and work is done to move it, the object undergoes motion.

Work, power, and energy are related concepts in physics, but they are different in terms of their definitions and units of measurement.

Work is the transfer of energy that occurs when a force is applied to an object and the object is moved through a distance. The amount of work done is equal to the force applied multiplied by the distance over which the force is applied. The unit of work is joules (J).

Power is the rate at which work is done or energy is transferred. It is equal to the amount of work done divided by the time taken to do the work. The unit of power is watts (W).

Energy is the capacity to do work, or the ability to cause change. It is a scalar quantity that comes in different forms, such as kinetic energy (energy of motion), potential energy (energy stored in an object due to its position or state), thermal energy (energy associated with the temperature of a system), etc. The unit of energy is also joules (J).

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The full three-dimensional strain tensor at the point

\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)

To calculate the full three-dimensional strain at the point \(p = e_1 + 2e_2 + 10e_3\), we need to find the components of the strain tensor \(\epsilon_m_n\).

The strain tensor εₘₙ can be calculated using the formula:

εₘₙ = (0.5) * (∂uₘ/∂xₙ + ∂uₙ/∂xₘ)

Given the displacement field u(x, t) with components:

u₁ = 0.1x₁x₂

u₂ = 0.1x₂ + 5

u₃ = 500

We can calculate the components of the strain tensor as follows:

\(\epsilon_1_1 = (1/2) * (\delta u_1/\delta x_1 + \delta u_1/\delta x_1)\\= (1/2) * (0.1x_2 + 0)\\= 0.05x_2\)

\(\epsilon_1_2 = (1/2) * (\delta u_1/\delta x_2 + \delta u_2/\delta x_1)\\= 0.05x_1\)

\(\epsilon _1_3 = (1/2) * (\delta u_1/∂x_3 + \delta u_3/\delta x_1)\\= (1/2) * (0 + 0)\\= 0\)

\(\epsilon_2_1 = (1/2) * (\delta u_2/\delta x_1 + \delta u_1/\delta x_2)\\= (1/2) * (0 + 0.1)\\= 0.05\)

ε₂₃ = (1/2) * (∂u₂/∂x₃ + ∂u₃/∂x₂)

= (1/2) * (0 + 0)

= 0

ε₃₁ = (1/2) * (∂u₃/∂x₁ + ∂u₁/∂x₃)

= (1/2) * (0 + 0)

= 0

ε₃₂ = (1/2) * (∂u₃/∂x₂ + ∂u₂/∂x₃)

= (1/2) * (0 + 0)

= 0

ε₃₃ = (1/2) * (∂u₃/∂x₃ + ∂u₃/∂x₃)

= (1/2) * (0 + 0)

= 0

Therefore, the full three-dimensional strain tensor at the point

\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)

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The electric potential energy of a system of two point charges is proportional to the product of the charges and inversely proportional to the distance between them.

\(U=\frac{k(q1 \times q2)}{r}\), where U is the potential energy, k is the Coulomb's constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them, gives the electric potential energy between two points charges.

Proportional to the product of charges:

The potential energy is directly proportional to the product of the charges' magnitudes. This implies that the potential energy of the system will rise if either or both of the charges do. Similar to this, the potential energy will be negative if the charges have the opposite signs.

Inversely proportional to the distance between them:

The distance between the charges has an inverse relationship with the potential energy. The potential energy diminishes with increasing distance between the charges. This is due to the fact that the electric force between the charges lessens with increasing distance, which lowers potential energy.

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The angular acceleration of the propeller is 7.54 rad/s²

This can be defined as the rate of change of angular velocity. The S.I unit of angular acceleration is rad/s.

The angular acceleration of the propeller can be calculated using the formula below.

⇒ Formular:

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Note: The negative sign tells that the propeller is slowing down.

Hence, The angular acceleration of the propeller is 7.54 rad/s²

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The work was done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\) and at an angle of \(29^o\) 42.83 J.

When an object is moved over a distance by an external force, at least some of that force must be applied in the direction of the displacement. This is known as work in physics. Work may be estimated if the force acting along the path is constant by multiplying the length of the path by the component of the force acting along the path.

To express this formally, the work W is equal to the force f times the length d, or W = fd. The work is W = fd cos if the force is applied at an angle to the displacement.

Given:

The mass, m = 2 kg,

The acceleration, g = 9.81 \(m/s^2\),

θ = angle between block and surface kinetic friction = μ

Calculate the work done by the formula given below,

\(W_{fy}\) = F sinθ

\(W_{fy}\) =  (\(mgsin\)θ)/ (sinθ -  μ * cosθ)

Substitute the values

\(W_{fy}\)  = \((2*9.81 sin29^{o} )/sin29^o - 0.30cos29^o\)

\(W_{fy}\)  = 42.83 J

Therefore, the work done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\), and at an angle of \(29^o\) is 42.83 J.

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Answer:

B

Explanation:

The impulse experienced by an object is the force•time.

The two errors in the passage are:

pH is a measure of the concentration of OH− ions in a solution of an acid or base. The pH scale plots the concentration of solutions in a range from 0–16.

The answer that correct both errors is:

pH is a measure of the concentration of H+ ions in a solution of an acid or base. The pH plots the concentration of solutions in a range from 0–14.

A solution's acidity or basicity is determined using the pH scale. A pH of 0-6.9 is considered acidic, a pH of 7 is neutral, and a pH of 7.1-14 is considered basic. The pH scale is logarithmic, which means that each change in pH reflects a tenfold difference in acidity or basicity.

The concentration of hydrogen ions (H+) in a solution determines the pH of the solution. A base is a chemical that reduces the concentration of H+ ions in a solution, whereas an acid raises the concentration of H+ ions in a solution.

Therefore, The  correct answer choice is:

" pH is a measure of the concentration of H+ ions in a solution of an acid or base. The pH plots the concentration of solutions in a range from 0–14."

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About 45,500,000 j is the amount of energy q you need to take off from 320 kg of water if you want to decrease its temperature from 52 0C to 18 0C.

Energy is the capacity to do work and can be transferred from one entity to another. It is found in many forms, including chemical, mechanical, thermal, electrical, and nuclear energy. Energy is essential for the functioning of all living things, as it powers processes such as growth, reproduction, and movement. It is also essential for the functioning of many machines and appliances. Without energy, the world would be unable to function as it does today.

The formula to calculate this is q = mCΔT, where m is mass, C is the specific heat of water (4,186 j/kg k), and ΔT is the change in temperature (34 0C). Therefore, q = 320 x 4,186 x 34 = 45,500,000 j.
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(a) the magnitude of the electric field at the origin is : E = (2kλ)/0= 2kλ

(b)  the direction of the electric field at the origin is in the positive x direction.

(a) The magnitude of the electric field at the origin is 2kλ, where k is the Coulomb constant and λ is the linear charge density. (b) The direction of the electric field at the origin is in the positive x direction.

(a) To find the magnitude of the electric field at the origin, we can use the formula for the electric field due to a line of charge :E = (2kλ)/r where E is the electric field, k is the Coulomb constant, λ is the linear charge density, and r is the distance from the line of charge.

Since the line of charge extends from x = 0 to positive infinity, the distance from the origin to the line of charge is r = 0. Therefore, the magnitude of the electric field at the origin is: E = (2kλ)/0= 2kλ

(b) The direction of the electric field is always directed away from a positive charge and towards a negative charge. Since the line of charge is positive, the electric field at the origin will be directed away from the line of charge, which is in the positive x direction.

Therefore, the direction of the electric field at the origin is in the positive x direction.

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Her average speed is 8.0km/h and her average velocity is 0km/h.

Speed is a scalar quantity. It only has magnitude. The formula for average speed is,

\(v=\frac{Distance }{Time}\)

The jogger has traveled a total distance of 16 km in 2 hours. Hence, the average speed of the jogger is 8.0 km/h

Velocity is a vector quantity. It has magnitude and direction. To find average velocity in a certain direction, we have to consider the magnitude and directionality.

The jogger runs along a straight path from point A to point B and travels back to the starting position in 2 hours. Hence the displacement of the jogger is 0 km whereas the distance traveled by the jogger remains 16 km.

The formula for average velocity is,

\(v=\frac{\Delta x}{\Delta t}\)

where Δx and Δt represent displacement and time taken respectively.

As the displacement of the jogger is 0 km, the average velocity of the jogger is 0 km/h.

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Answer:

the capacity to do work is called energy

The force of friction acting on the fridge is 149.3 N.

Force of friction is the force that tends to oppose the motion of two surfaces that are in contact.

To get an object into motion the force of friction must be overcame.

The force of friction also tends to oppose the motion of an object.

The frictional force on the refrigerator is calculated by apply Newton's second law of motion.

F - Ff = ma

where;

If the refrigerator didn't budge, acceleration = 0

F - Ff = 0

F = Ff

149.3 N = Ff

Thus, when the force of friction is equal to applied force, the object won't move.

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The chemical equation for this reaction is : 4HCl + O2 ----> 2Cl2 + 2H2O.

Four moles of hydrochloric acid in aqueous state reacts with oxygen gas  in the gaseous state to produce two moles of chlorine molecule present in gaseous state and two moles of water which is in liquid state.

Oxidation state of Cl on left side of the equation is -1 and on the right side of equation oxidation state of Cl becomes zero. It means that it undergoes oxidation.

Oxygen molecule whose oxidation state is zero on the left side of the equation and oxidation state of oxygen becomes -2. It means that it undergoes reduction.

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