Differentiate between static friction and sliding friction.

Answer:

inverse

Criminology

Explanation:

Answer:

positive

Explanation:

ANSWER

Normal force

EXPLANATION

We want to determine what FN would represent on a force diagram.

On a force diagram, FN represents the component of a contact force that acts perpendicular to the surface with which an object makes contact. It is exerted by surfaces and prevents objects from passing through each other.

This force is known as the normal force.

That is the answer.

(a) The power required for the car to climb the hill at steady speed is 15,555.56 W.

(b) The power required for the car to climb the hill at a changing speed is  19,444.44 W.

The power required for the car the move the incline is calculated as follows;

When the speed is steady, the average speed is calculated as;

v = ( 80km/h + 80 km/h) / 2 = 80 km/h = 22.22 m/s

P = Fv

where;

P = ( 700 N x 22.22 m/s )

P = 15,555.56 W

When the speed changes from 90 km/h to 110 km/h, the average speed is calculated as;

v = ( 90 km/h + 110 km/h ) / 2 = 100 km/h = 27.78 m/s

P = ( 700 N x 27,78 m/s )

P = 19,444.44 W

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The given data for a person walking using a motion capture system is shown in the table below:Table showing motion capture data Frame Time (s) Hip angle (degrees) Knee angle (degrees) 1 0 60 180 2 0.03 58 178 3 0.06 56 176 4 0.09 54 174 5 0.12 52 172 6 0.15 50 170 7 0.18 48 168.

To calculate the angle of the thigh at frame 4 (in rad), we need to find the hip angle at frame 4, which is 54 degrees. To convert degrees to radians, we can use the formula:Radians = Degrees x π / 180Using this formula, we can find the angle of the thigh at frame 4 (in rad) as follows:Angle of thigh at frame 4 (in rad) = Hip angle at frame 4 x π / 180= 54 x π / 180= π / 3 radiansTherefore, the angle of the thigh at frame 4 (in rad) is π / 3 radians.

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Answer:

please find attached pdf

Explanation:

To find the maximum of u(ν) with increasing temperature, we need to solve the following equation: du(ν)/dν = 0.

The given statement implies that the maximum of u(ν) occurs at higher frequencies as the temperature increases.

To locate the maximum point, we need to find the derivative of u(ν) with respect to ν and set it equal to zero.

This will help us identify the critical points of the function, which correspond to the maxima, minima, or inflection points.

Summary: To find the maximum of u(ν) with increasing temperature, solve the equation du(ν)/dν = 0. This will help determine the critical points of the function, which can be used to identify the maximum point at higher frequencies.

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CSP technologies can be used to generate electricity by converting sunlight energy to power a turbine, but the same basic technologies can also be used to deliver heat to a variety of industrial applications such as water desalination, enhanced oil recovery, food processing, chemical production, and mineral processing.

Concentrating  solar-thermal powertechnologies use mirrors to reflect and concentrate sunlight onto a receiver. The energy from the concentrated sunlight heats a high temperature fluid in the receiver.

This heat, also known as thermal energy, can be used to spin a turbine or power an engine, thereby producing electricity. It can also be used in industrial applications such as water desalination, improved oil recovery, food processing, chemical production, and mineral processing.

Utility-scale projects typically employ concentrated solar-thermal power systems. Utility-scale CSP plants can be configured in a variety of ways. Mirrors are arranged around a central tower that serves as the receiver in power tower systems. Linear systems use rows of mirrors to focus sunlight onto parallel tube receivers located above them.

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Answer:

Explanation:

The book is affected by the force of gravity from the Earth and the reaction of the support from the table

Answer:

It’s stratosphere

Explanation:

Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

Ozone is an allotrope of oxygen. It is blue in color and it is found in Earth's atmosphere. It protects the Earth from ultraviolet rays from the Sun.

The ozone subcaste is centered at an altitude between 10-15 country miles (15-25 km). Close to 90% of the ozone found in the atmosphere is in the stratosphere. Ozone that is found in this region is about 10 parts per million by volume (ppmv) to the troposphere's 0.04 ppmv.

Therefore, we have determined that Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

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When electrons are emitted from the cathode, they can have zero velocity, one velocity, or a range of velocities depending on the conditions under which they are emitted.

For example, in a vacuum tube, electrons are emitted from the cathode due to thermionic emission and they typically have a range of velocities.

However, in a photoelectric effect experiment, electrons are emitted from the cathode due to the absorption of photons and they typically have a well-defined velocity determined by the energy of the incident photons.

Similarly, in a field emission experiment, electrons are emitted from the cathode due to a high electric field and they typically have a high velocity.

Therefore, the velocity of the electrons emitted from the cathode depends on the mechanism of emission and the conditions under which they are emitted.

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A voltage as low as 112.5 volts could be potentially fatal if the electrician makes good contact with conductors while having sweaty hands, leading to a current passing near the heart.

To determine the fatal voltage, we can use Ohm's Law, which states that voltage (V) is equal to the product of current (I) and resistance (R).

Rearranging the equation to solve for voltage, we have V = I * R.

Given that the current required to be fatal is 50 mA (0.05 A) and the electrician's resistance is 2250 ohms, we can calculate the fatal voltage as V = 0.05 A * 2250 ohms = 112.5 volts.

Therefore, a voltage as low as 112.5 volts could be potentially fatal if the electrician makes good contact with conductors while having sweaty hands, leading to a current passing near the heart.

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For people who don't speak Spanish.

translation:  

Identify the type of variable for each given situation (qualitative: nominal or ordinal) or (quantitative: continuous or discrete)

sorry though I cant answer your question.

4.58m/s

Explanation:

V= displacement/time

circumference=2(pi)r

displacement= (2)(pi)(.6)(3.4)=12.8176

V= 12.8176/2.8

V=4.58 m/s

Answer:

1.656 × 10^(-21) J

Explanation:

Formula for the average translational kinetic energy per atom is;

K.E = (3/2)kΔt

Where;

k is boltzmann constant = 1.38 × 10^(-23) J/K

ΔT is change in temperature = 373 - 293 = 80 K

Thus;

K.E = (3/2) × 1.38 × 10^(-23) × 80

K.E = 1.656 × 10^(-21) J

A body is in mechanical equilibrium when the (c) sum of the external forces acting on it is zero. This means that the body is not accelerating and its angular velocity is not changing. In other words, the body is in a state of rest or moving with a constant velocity.

When a body is in mechanical equilibrium, the net force acting on it is zero, which means that the body is not accelerating. This is because the body experiences equal and opposite forces that cancel each other out, resulting in a net force of zero.

In addition, when a body is in mechanical equilibrium, the net torque acting on it is zero, which means that the body is not rotating or its angular velocity is not changing. This is because the body experiences equal and opposite torques that cancel each other out, resulting in a net torque of zero.

To summarize, a body is in mechanical equilibrium when the sum of the external forces and the sum of the external torques acting on it is zero. This means that the body is not accelerating and its angular velocity is not changing. A common example of a body in mechanical equilibrium is an object at rest on a flat surface, where the force of gravity is balanced by the normal force exerted by the surface.

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A body is in mechanical equilibrium when

A.it is moving with constant acceleration.

B.it is being moved by a constant force.

C.the sum of the external forces acting on it is zero.

D.the sum of the external torques acting on it is zero.

E.it is moving with constant linear velocity and rotating with a constant angular velocity.

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Answer:

fridge microwave washer dryer tv fan dishwasher fish tank lights toaster coffee pot

When one organism in a food chain is destroyed, it can have a significant effect on the entire food chain.

For example, if a producer such as a plant is destroyed, it can cause a decrease in food availability for primary consumers, such as herbivores.

This can then lead to a decrease in population of the primary consumers, which can then affect the secondary consumers, such as carnivores, who rely on the primary consumers for food. This can ultimately lead to a decrease in the overall biodiversity of an ecosystem.

It is important to remember that every organism in a food chain plays a crucial role in maintaining the balance of the ecosystem, and the destruction of one organism can have a domino effect on the entire food chain.

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Answer:

You only have  12 Seconds to Pitch

A baseball game usually lasts 3 hours long

The record of most home runs in a baseball match by one person is 4

Explanation:

I hope this helps u

A proton with kinetic energy T=10 MeV flies past a stationary free electron at a distance b=10 pm. The energy acquired by the electron is 286 eV, assuming the proton's trajectory to be rectilinear and the electron to be practically motionless as the proton flies by.

To find the energy acquired by the electron, we can use the concept of Coulomb scattering. In this process, the proton and the electron interact via the electrostatic force, which transfers energy from the proton to the electron.

The maximum energy transferred to the electron (ΔE) can be found using the following formula:

ΔE = (2 * k * q1 * q2) / b

where k is the Coulomb constant (approximately 8.99 × 10^9 N m^2 C^−2), q1 and q2 are the charges of the proton and electron (1.6 × 10^-19 C each), and b is the impact parameter (10 pm or 10 × 10^-12 m).

Plugging the values into the formula, we get:

ΔE = (2 * 8.99 × 10^9 N m^2 C^−2 * (1.6 × 10^-19 C)^2) / (10 × 10^-12 m)

ΔE ≈ 4.58 × 10^-17 J

Now, to convert the energy into electron volts (eV), we can use the following conversion:

1 eV = 1.6 × 10^-19 J

ΔE ≈ (4.58 × 10^-17 J) / (1.6 × 10^-19 J/eV) ≈ 286 eV

So, the energy acquired by the electron is approximately 286 eV. This value is much smaller than the initial kinetic energy of the proton (10 MeV), confirming the assumption that the electron is practically motionless as the proton flies by.

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Answer:

A)     E = 145.6 N / C , B)  y= 2,8 10-7 m with a downward direction

C) he shape of the trajectory of the two particles is to simulate a parabola,

D)     F_{e} /F_{g} = 10³⁴

Explanation:

A) For this exercise we use Newton's second law to find the acceleration of the electron, where the force is electric

           F = m a  

           - e E = m a

          a = - e E / m

with the field directed downward, the acceleration is in the vertical upward direction.

We look for how much the electron moves with kinematics, in the x direction there is no acceleration,

x axis (parallel to plates)

           x = v₀ t

           t = x / v₀

y axis (perpendicular to plates)

          y = y₀ + \(v_{oy}\) t + ½ a t²

Let's take the zero of the system in the middle of the plates y₀ = 0, also the initial vertical velocity is zero (v_{oy} = 0) the width of the plate is known

          y = ½ a t²

we substitute

         y = ½ (e E /m)  (x / v₀)²

         y = ½ e x2 /m v₀²   E

we look for the electric field

        E = 2 m y v₀² / e x²

where to use this expression the length and width of the condenser must be known, suppose that the length is x = l = 1 cm = 1 10⁻² m and the width is y = 0.5 mm = 0.5 10⁻³ m

let's calculate

         E = 2  9.1 10⁻³¹ 0.5 10⁻³ (1.6 10⁶)² / (1.6 10⁻¹⁹ (1 10⁻²)²)

         E = 145.6 N / C

B) The electron is exchanged for a proton

Let's look for the vertical displacement, in this case as the proton has a positive charge it moves towards the bottom of the plates

          y = ½ e x² / m v₀² E

          y = ½ 1.6 10⁻¹⁹ 1 10⁻⁴ / (1.67 10⁻²⁷ (1.6 10⁶)²   145.6

          y = 28.4375 10⁻⁸ m

since the distance between the plates is 0.5 10-3 m, the proton passes the condensate because its deflection is very small

In summary, its displacement is y= 2,8 10-7 m and with a downward direction (the same direction of the electric field)

C) The shape of the trajectory of the two particles is to simulate a parabola, but one for having a negative charge (electron) the force is upwards and the other for having a positive charge (proton) the trajectory is downwards

D) The force of gravity

           \(F_{g}\) = G m M / R²

electron

          Between the electron and the positive charges of the conducting plate

           F_{g}= 6.67 10⁻¹¹ 1.67 10⁻²⁷ 9.1 10⁻³¹ / (0.5 10⁻³)²

           F_{g} = 4.1 10⁻⁵¹ N

electric force

           F_{e} = -e E

           F_{e} = - 1.6 10⁻¹⁹ 145.6

           F_{e} = 2.3 10⁻¹⁷ N

let's look for the reason between these two forces

         F_{e} / F_{g} = 2.3 10⁻¹⁷ / 4.1 10⁻⁵¹

          F_{e} /F_{g} = 10³⁴

We see that the electric force is many orders of magnitude higher than the gravitational force.

Answer:

22500 Ns

Explanation:

Given,

Mass ( m ) = 1500 kg

Velocity ( v ) = 15 m/s

Formula : -

Impulse = mv

Impulse

= 1500 x 15

= 22500 Ns

Therefore,

22500 Ns is the impulse experienced by the car.

Note : -

Ns is the unit of impulse.

The new  time period of the system is 8.77 sec. If she stands up.

calculation

T = 2π√(L/g)

l = g*(8.85/2π)^2

new length = l -0.35= 8.85-0.35

T = 8.77 sec

Term (T) is the amount of time an oscillating body takes to repeat itself, and Frequency (f or ν) is the variety of instances it repeats in one 2d or unit time. in case you degree time in s (seconds) then frequency is measured in Hz (cycles or durations in keeping with second.

center of mass:

The centroid of a mass distribution in space is the unique point where the weighted relative positions of the distribution masses sum to zero. This is the point where force can be applied to produce linear acceleration without angular acceleration.

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Answer:

I believe its the blue, sorry if I'm wrong

Answer:

To calculate the linear expansion of a brass rod due to a temperature change of 100K, we can use the formula:

ΔL = α * L * ΔT

where:

α = linear expansivity of brass (1.8 x 10^-5K^-1)

L = original length of the rod (2m)

ΔT = change in temperature (100K)

Plugging in the values:

ΔL = 1.8 x 10^-5K^-1 * 2m * 100K = 0.036m

So the linear expansion of the brass rod due to a temperature change of 100K is 0.036 meters.

A cannonball rolling off the edge of a table would not be considered as a projectile. Hence the correct option is C.

A projectile is an object that is launched into the air and moves under the influence of gravity.

It typically follows a parabolic trajectory.

In options a and b, the cannonball is either rolling down a slope or thrown through the air, both of which involve the cannonball being launched and moving under the influence of gravity.

However, in option c, the cannonball is simply rolling off the edge of a table, which does not involve any launch or initial velocity. It is just rolling due to the force of gravity acting upon it. Therefore, option c would not be considered as a projectile.

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Apply ohms law

Answer :-

Explanation :-

As per the provided information in the given question, we have been given that the Potential Difference is 240 Volt's . Resistance is given as 12 Ohm's . And, we have been asked to calculate the Current .

For calculating the Current , we will use the Formula :-

\( \bigstar \: \: \: \boxed{ \sf{ \: Current \: = \: \dfrac{Voltage}{Resistance} \: }} \\ \)

Therefore , by Substituting the given values in the above Formula :-

\( \Longrightarrow \: \: \: \sf { Current \: = \: \dfrac{Voltage}{Resistance} } \\ \)

\( \Longrightarrow \: \: \: \sf { Current \: = \: \dfrac{ \: 240 \: }{12} } \\ \)

\( \Longrightarrow \: \: \textbf {\textsf { Current \: = \: 20 }} \\ \)

Hence :-

\( \underline {\rule {180pt}{4pt}} \)

Additional Information :-

\( \Longrightarrow \: \: \: \sf {Voltage \: = \: Current \: \times \: Resistance} \)

\( \Longrightarrow \: \: \: \sf {Current \: = \: \dfrac {Voltage}{Resistance} } \)

\( \Longrightarrow \: \: \: \sf {Resistance \: = \: \dfrac {Voltage}{Current} } \)

Answer:

The warmer the temperature the more kinetic energy.  

Explanation:

The highest temperature

The typical kinetic energy formula is used to comprehend the kinetic energy of a gas. This formula uses the gas's temperature to calculate the kinetic energy, or KE. This is carried out because a gas's kinetic energy is exactly related to its temperature. Thus option D is correct.

Temperature is a gauge for the typical kinetic energy of a substance's constituent particles. It is a particle's typical kinetic energy.

A gas's temperature directly relates to the average kinetic energy of its particles. The particles must travel more quickly as the gas warms since their mass is constant.

The average kinetic energy of the particles in a sample of matter falls as it is continuously cooled. One would anticipate that eventually the particles will stop moving altogether.

Therefore, beaker D: 18 degree Celsius having average kinetic energy of the particles the greatest.

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Answer:

A coil having 45 loops

Explanation:

The strength of an electromagnet is proportional to the number of loops. So, when we have more loops, we will get mor strength. It means that the coil that will produce a magnetic field with the maximum strenght is a coil having 45 loops because 45 is the greatest number in the list.