If a car travels 400m in 20 seconds how fast is it going? 20 m/s

I believe a scale is good

(a) In a parallel-flow arrangement, the outlet temperature of the water and the air can be determined using the energy balance equation. The heat transfer rate between the water and the air is equal to the product of the water mass flow rate, specific heat capacity of water, and the change in temperature of the water:

Similarly, the heat transfer rate between the air and the water is equal to the product of the air mass flow rate, specific heat capacity of air, and the change in temperature of the air:

Since the heat exchanger is operating under fully-developed flow conditions, the outlet temperature of the water and the air can be found by equating the heat transfer rates:

By substituting the given values, including the specific heat capacities of water and air, and solving the equations, the outlet temperatures of the air and water can be calculated.

(b) In a counter-flow arrangement, the outlet temperatures of the air and water can be determined using a similar energy balance equation. However, in this case, the change in temperature of the air is taken as the difference between the outlet and inlet temperatures of the air:

Again, by equating the heat transfer rates, substituting the given values, and solving the equations, the outlet temperatures of the air and water in a counter-flow arrangement can be calculated.

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Answer:

a.200 Newtons

Explanation:

Given the following data;

Mass = 20kg

Acceleration = 10m/s²

To find the force;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Substituting into the equation, we have

\( Force = 20 * 10 \)

Force = 200 Newton.

The answer to this question depends on the specific conditions and properties of the system in question. However, in general, the process that takes more heat is constant pressure at the same temperature increase.

This is because at constant pressure, the volume of the system can change, which means that more heat is needed to increase the temperature of the system by the same amount compared to a system at constant volume.
To understand why this is the case, we can look at the ideal gas law, which states that pressure, volume, and temperature are related by the equation PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature. If we hold the number of moles and the gas constant constant, we can see that if the pressure is constant and the temperature increases, the volume of the gas will also increase. This means that more heat is needed to increase the temperature of the gas by the same amount compared to a system at constant volume, where the volume remains constant and the pressure increases with temperature.
In conclusion, at constant pressure, the volume of the system can change, which means that more heat is needed to increase the temperature of the system by the same amount compared to a system at constant volume. Therefore, the process that takes more heat is constant pressure at the same temperature increase.

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The kinetic energy of the ball just after it is kicked is 48 J.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all instances of objects in motion that use kinetic energy.

Vibrational, rotational, and translational energy are the three subtypes of kinetic energy. Unsurprisingly, vibrating things are the source of vibrational kinetic energy. While objects colliding with one another produce translational kinetic energy, objects moving create rotational kinetic energy.

Given:

Mass- 0.43kg

Velocity- 15

kinetic energy = 1/2 mv²

kinetic energy of the ball = 1/2 (0.43)(15)²

kinetic energy of the ball = 48 J.

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The change in specific entropy of air is 0.3471 kJ/kg-K.  The specific entropy of the air can be calculated using the formula:

\($$\Delta s = c_p\ln\frac{T_2}{T_1}-R\ln\frac{P_2}{P_1}$$\)

Where,

\($$\Delta s= \text{Change in specific entropy of air}$$\)

\($$T_1= \text{Initial temperature of air}= 500\text{ °C}= 773.15\text{ K}$$\)

\($$T_2= \text{Final temperature of air}= 50\text{ °C}= 323.15\text{ K}$$\)

\($$P_1= \text{Initial pressure of air}= 2000\text{ kPa}$$\)

\($$P_2= \text{Final pressure of air}= 100\text{ kPa}$$\)

\($$c_p = \text{Specific heat capacity of air at constant pressure}= 1.005\text{ kJ/kg-K}$$\)

\($$R = \text{Gas constant for air}= 0.287\text{ kPa.m³/kg-K}$$\)

Substituting the given values in the above equation we get,

\($$\begin{aligned}\Delta s&= c_p\ln\frac{T_2}{T_1}-R\ln\frac{P_2}{P_1}\\&= 1.005\ln\frac{323.15}{773.15}-0.287\ln\frac{100}{2000}\\&= -0.4736+0.8263\\&=0.3527\text{ kJ/kg-K}\end{aligned}$$\)

Therefore, the change in specific entropy of air is 0.3471 kJ/kg-K (rounded to four significant figures).

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The correct answer is: "If the ejected air is directed forward, then the thrust force is also directed forward (Newton's 3rd law)."Newton's third law states that every action has an opposite response. Ejected air provides a response force that moves the object forward.

The correct sentence is: "If the ejected air is directed forward, then the thrust force is also directed forward (Newton's 3rd law)." Newton's 3rd law states that every action has an opposite response. In a rocket or jet engine, the action is ejecting air or exhaust gases, and the reaction is thrust.

Air or exhaust gases expelled forward create a motion. According to Newton's 3rd law, an equal and opposite reaction pushes the item or system forward. Rockets, jet engines, and air pumps use this principle. The system moves forward or generates thrust by expelling mass (air or gases) in one direction. Newton's 2nd law of force, mass, and acceleration does not address thrust direction. Instead, it measures force-acceleration relationships.

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Answer:

a. 2 Hz b. 0.5 cycles c . 0 V

Explanation:

a. What is period of armature?

Since it takes the armature 30 seconds to complete 60 cycles, and frequency f = number of cycles/ time = 60 cycles/ 30 s = 2 cycles/ s = 2 Hz

b. How many cycles are completed in T/2 sec?

The period, T = 1/f = 1/2 Hz = 0.5 s.

So, it takes 0.5 s to complete 1 cycles. At t = T/2 = 0.5/2 = 0.25 s,

Since it takes 0.5 s to complete 1 cycle, then the number of cycles it completes in 0.25 s is 0.25/0.5 = 0.5 cycles.

c. What is the maximum emf produced when the armature completes 180° rotation?

Since the emf E = E₀sinθ and when θ = 180°, sinθ = sin180° = 0

E = E₀ × 0 = 0

E = 0

So, at 180° rotation, the maximum emf produced is 0 V.

Part A) The particle is located at r=(6.4i+2.9j)(0s)2=0m at time t=0s. As a result, there is no distance from the origin.

Part A) The particle is located at r=(6.4i+2.9j)(0s)2=0m at time t=0s. As a result, there is no distance from the origin.

Part B) The particle's position at t(subscript 1)=2.3s is r=(6.4i+2.9j)(2.3s)2=37.7i+14.8jm. Hence, (37.7+2+14.8)m is the distance from the origin.

Part C) The particle's position at t(subscript 2)=6.0s is r=(6.4i+2.9j)(6.0s)2=1382.4i+315.6jm. As a result, the distance from the origin is equal to 1420m (1382.4 + 315.6).

Part D) The derivative of the position with respect to time at t=0s gives the particle's speed at that moment: |r(t=0s)|=|d/dt(6.4i+2.9j)t2|=0m/s.

Part E) The derivative of the position with respect to time at t=2.3s gives the particle's speed at t(subscript 1)=2.3s: |r⃗(t=2.3s)|=|d/dt(6.4i^+2.9j^)t^2|=87.4m/s.

Part F) The derivative of the position with respect to time at t=6.0s gives the particle's speed at t(subscript 2)=6.0s: |r⃗(t=6.0s)|=|d/dt(6.4i^+2.9j^)t^2|=230.4m/s.

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When an electron is moving due north in a region where the electric field points due west, then the electron curves away from due north towards the east. So, the option (D) is the correct answer.

The motion of the electron can be described by the Lorentz force equation:

F = qE + qv x B

Where,

F = force on a charged particle in newtons (N)

q = charge on a particle in coulombs (C)

E = electric field in volts per meter (V/m)

v = velocity of the charged particle in meters per second (m/s)

B = magnetic field in tesla (T)

The first term of the above equation, qE, is responsible for changing the direction of the charged particle (electron) due to the electric field. While the second term qv × B is responsible for the curve in the path of the charged particle due to the magnetic field.

Hence, the correct option is D.

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Answer:

Pulleys accomplish 2 separate operations throughout the computer controlled additional benefit technologies listed elsewhere here.

Explanation:

Answer:

The gravitational force on a mass is its weight. We can write this in vector form, where  

→

w

is weight and m is mass, as

→

w

=

m

→

g

.

In scalar form, we can write

w

=

m

g

.

Since  

g

=

9.80

m/s

2

on Earth, the weight of a 1.00-kg object on Earth is 9.80 N:

w

=

m

g

=

(

1.00

kg

)

(

9.80

m/s

2

)

=

9.80

N

Explanation:

Answer:

Is Mercury an answer on your thing?

Explanation:

Mercury has the least amount of gravity, so therefore you can jump the highest on Mercury.

Answer:

Jupiter

Explanation:

Jupiter has more than 300 time the mass as earth. so, it's gravitational pull is stronger.

Hopefully this helps

The  two examples of electrical or devices that run on electrical energy from these sources are Solar and hydro energy

Solar energy is a type of renewable energy that is obtained from the sun. It is a clean and sustainable source of energy that does not produce greenhouse gases or other harmful emissions. Solar energy is captured through the use of solar panels or photovoltaic (PV) cells, which convert sunlight into direct current (DC) electricity. This DC electricity is then converted into alternating current (AC) electricity, which is the form of electricity used in homes and businesses.

Hydroelectric power plants Hydroelectric power plants generate electricity by harnessing the kinetic energy of falling water. Hydroelectric turbines Turbines used in hydroelectric power plants to generate electricity.

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Here are the four strings (two members and two non-members) for each of the following languages, with the alphabet σ = {a,b}

Language:

Language:

Members:

Language:

Members:

Language:

The alphabet is a writing system based on the symbols of vowel and consonant phonemes. The word alphabet is taken from the Greek language, from the first two letters of their writing, namely alpha and beta and alphabet is a set of graphics or characters used to represent the phoneme structure of a language. The phoneme itself means the smallest unit of sound capable of showing contrast in meaning.

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The trajectory of the object in space has an altitude of 1200 nary (2209 km), a velocity of 7000 m/s, and an elevation angle (Φ) of +40 degrees. This trajectory describes a high-speed ascent into space, likely representing the launch of a spacecraft or a ballistic missile.

1. The given altitude of 1200 nary (2209 km) indicates the height above the Earth's surface at which the object is observed. This suggests that the object has already achieved a significant distance from the Earth's surface.

2. The velocity of 7000 m/s indicates the speed at which the object is moving. This high velocity implies that the object is traveling at a considerable speed, likely surpassing the escape velocity of the Earth.

3. The elevation angle (Φ) of +40 degrees describes the angle at which the object's trajectory deviates from the horizontal plane. A positive elevation angle indicates an upward trajectory from the observer's reference point.

4. Based on the given parameters, it can be inferred that the object is following a high-speed ascent trajectory, possibly representing a launch into space. The combination of the high altitude, high velocity, and positive elevation angle suggests that the object is moving away from the Earth's surface and is on a trajectory to reach a higher orbit or escape the Earth's gravitational pull.

5. To find V, v, and Φ when r = 6.378 x 10^6 m, we need additional information or equations related to the specific trajectory or orbital parameters. Without this information, it is not possible to determine these values accurately.

6. A sketch of the trajectory would show an upward path with an increasing altitude, indicating the object's ascent into space. The point where r = 6.378 x 10^6 m would correspond to the Earth's surface, specifically the point of reference for the altitude measurement.

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Answer:

The initial momentum of the bowling ball is 20 kgm/s.

Explanation:

Given;

mass of the bowling ball, m₁ = 5.0 kg

initial velocity of the bowling ball, u₁ = 4.0 m/s

mass of the Frodo, m₂ = 60 kg

initial velocity of Frodo, u₂ = 0

The initial momentum of the bowling ball is calculated as;

P = m₁u₁

P = 5 x 4

P = 20 kgm/s

Therefore, the initial momentum of the bowling ball is 20 kgm/s.

Answer:

52 kilometers

Explanation:

Since we know that there are 1,000 meter in 1 kilometer, we can divide 52,000 by 1,000 (because we want know that every 1,000 meter is 1 kilometer).

52,000/1,000= 52 kilometers

That's your answer.

Hope this helped! :)

Answer:

52 Kilo

Explanation:

52,000/1,000= 52 kilometers

Answer:

Hey there!

The answer would be a Behavioral perspective.

Let me know if this helps :)

The gauge pressure in the higher part will be 136 kph. The pressure is found with the help of the Bernoulli equation.

The difference between absolute pressure and atmospheric pressure is known as gauge pressure. Relative pressure is another name for gauge pressure.

From the continuity equation;

\(\rm A_1v_1=A_2v_2 \\\\ \rm \frac{\pi}{4}(6)^2 \times 5 = \frac{\pi}{4}(3)^2 v_2 \\\\ v_1 = 20 \ m/sec\)

The gauges pressure in the higher part is found as;

From the Bernoullis equation;

\(\rm \frac{P_1}{\rho g} + \frac{v_1^2}{2g} +Z_1 = \frac{P_2}{\rho g} + \frac{v_2^2}{2g} +Z_2 \\\\ \frac{80 \times 10^3 }{\rho g} + \frac{(5)^2}{2g} +0= \frac{p_2}{\rho g} + \frac{(20)^2}{2g} +3 \\\\ \frac{80 \times 10^3 - P_2 }{1000 \times 9.81 } = \frac{20^2-5^2}{2 \times 9.81 } +3 \\\\ P_2 = 136 \ kpa\)

Hence the gauge pressure in the higher part will be 136 kpa.

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Answer:

Assumption: the acceleration of this bus is constant while the brake was applied.

Acceleration of this bus: approximately \(\left(-6.0\; \rm m \cdot s^{-2}\right)\).

It took the bus approximately \(1.7\;\rm s\) to come to a stop.

Explanation:

Quantities:

Consider the following SUVAT equation:

\(\displaystyle x = \frac{1}{2}\, \left(a\, t^2\right) + u\, t\).

On the other hand, assume that the acceleration of this bus is indeed constant. Given the initial and final velocity, the time it took for the bus to stop would be inversely proportional to the acceleration of this bus. That is:

\(\displaystyle t = \frac{v - u}{a}\).

Therefore, replace the quantity \(t\) with the expression \(\displaystyle \left(\frac{v - u}{a}\right)\) in that SUVAT equation:

\(\displaystyle x = \frac{1}{2}\, \left(a\, \left(\frac{v -u}{a}\right)^2\right) + u\, \left(\frac{v - u}{a}\right)\).

Simplify this equation:

\(\begin{aligned}x &= \frac{1}{2}\, \left(a\, {\left(\frac{v -u}{a}\right)}^2\right) + u\, \left(\frac{v - u}{a}\right) \\ &= \frac{1}{2}\left(\frac{{(v - u)}^2}{a}\right) + \frac{u\, (v - u)}{a} =\frac{1}{a}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right)\end{aligned}\).

Therefore, \(\displaystyle a= \frac{1}{x}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right)\).

In this question, the value of \(x\), \(u\), and \(v\) are already known:

Substitute these quantities into this equation to find the value of \(a\):

\(\begin{aligned} a &= \frac{1}{x}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right) \\ &= \frac{1}{10\; \rm m}\times \left(\frac{{\left(0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}\right)}^2}{2} + \left(0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}\right)\times 10\; \rm m \cdot s^{-1}\right)\\ &\approx -6.0\; \rm m \cdot s^{-2}\end{aligned}\).

(The value of acceleration \(a\) is less than zero because the velocity of the bus was getting smaller.)

Substitute \(a \approx -6.0\; \rm m \cdot s^{-2}\) (alongside \(u = 10\; \rm m \cdot s^{-1}\) and \(v = 0\; \rm m \cdot s^{-1}\)) to estimate the time required for the bus to come to a stop:

\(\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}}{-6.0\; \rm m \cdot s^{-2}} \approx 1.7\; \rm s\end{aligned}\).

The momentum of the bike moving along the path with a constant velocity is  375 kgm/s.

The momentum of an object is the effect experienced by a moving object when a certain force acts on it. It is the product of mass and velocity.

The momentum of the bike is calculated as follows;

P = mv

P = 75 x 5

P = 375 kgm/s

Thus, the momentum of the bike moving along the path with a constant velocity is  375 kgm/s.

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Answer:

2

Explanation:

A protein is made...

Answer:

it is used because

They are also less likely to jam due to rust in the screw thread.

Hydraulic jacks are often used to lift elevators in low and medium rise buildings.

A hydraulic jack uses a liquid that is forced into a cylinder by a pump plunger.

The law of conservation of matter and the law of conservation of energy essentially state that neither type of energy can be created nor destroyed, only transformed. The process by which grapes ferment to produce wine is an illustration of the law of conservation of matter. The amount of matter in the reactants in the bottle doesn't change, but its chemical form does.

It is a fundamental tenet of classical physics that matter cannot be created or destroyed in an isolated system; rather, it can only be changed from one form to another. This means that despite the apparent changes that are seen, no matter is lost during any chemical or physical change that may occur with any substance.

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Answer:

below

Explanation:

The camera's initial upward velocity will be the same as yours at that instant

Vf = at  = 8 * 3 = 24 m/s   upward

THEN (after you drop it) , its velocity is given by:

Vf = Vo + at         where a = - 9.81 m/s^2

Vf = 24  + (-9.81)(2) = 4.38  m/s upward  = ~ 4.4 m/s

b)    in two seconds   YOU travel (from the point you dropped your camera)

       d = vo t + 1/2 a t^2

          = 24 (2)  + 1/2 ( 8)(2^2) = 64 meters

      and your camera travels   d = Vot + 1/2 at^2

                                                       24 (2) + 1/2(-9.81)(2^2) = 28.38 m

    a difference of   64 - 28.38 = 35.62 m

(a) The speed of the ice cube is given by v = √(gR)

(c) If R is made two times larger, the required speed will decrease by a factor of √2

(d) the time required for each revolution will remain constant.

(a) The speed of the ice cube can be found using the equation for centripetal acceleration: v = √(gR), where v is the speed, g is the acceleration due to gravity, and R is the radius of the circle.

(b) No piece of data is unnecessary for the solution.

(c) If R is made two times larger, the required speed will decrease by a factor of √2. This is because the speed is inversely proportional to the square root of the radius.

(d) The time required for each revolution will stay constant. The time period of revolution is determined by the speed and radius, and since the speed changes proportionally with the radius, the time remains constant.

(e) The answers to parts (c) and (d) are not contradictory. While the speed decreases with an increase in radius, the time required for each revolution remains constant. This is because the decrease in speed is compensated by the larger circumference of the circle, resulting in the same time taken to complete one revolution.

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The complete question is:

A basin surrounding a drain has the shape of a circular cone opening upward, having everywhere an angle of 35.0° with the horizontal. A 25.0-g ice cube is set sllding around the cone without friction in a horizontal circle of radlus R. (a) Find the speed the ice cube must have as a function of R. (b) Is any piece of data unnecessary for the solution? Select-Y c)Suppose R is made two times larger. Will the required speed increase, decrease, or stay constant? Selectv If it changes, by what factor (If it does not change, enter CONSTANT.) (d) Will the time required for each revolution increase, decrease, or stay constant? Select If it changes, by what factor? (If it does not change, enter CONSTANT.) (e) Do the answer to parts (c) and (d) seem contradictory? Explain.

Answer:

Explanation:

What???

A dielectric material is a non-steel substance having an excessive particular resistance, a bad temperature coefficient of resistance, and an excessive insulating resistance. another definition of dielectric fabric is a non-accomplishing substance that holds electrical costs.

The capacitance of a capacitor is affected by the area of the plates, the gap among the plates, and the capability of the dielectric to aid electrostatic forces. A dielectric is basically an insulator. An insulator is used to forestall the modern-day from flowing. As both the activity of the capacitor and dielectric is to prevent the cutting-edge form from flowing, putting a dielectric in between the plates of the capacitor will grow the capacitance as an end result.

All-dielectric substances are insulators, but a terrific dielectric is one that is without difficulty polarized. the amount of polarization that happens whilst a sure voltage is implemented to an item influences the quantity of electrical power that is saved within the electric-powered area.

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