Boiler monitor: Over the following three chapters, we will create an app that monitors the temperature and pressure of a boiler. You can model the app based on the Thyroid app. In this chapter, we will create the skeleton of the app, similar to the Thyroid app. Now, just create the pages and the links to navigate between them; you will implement the functionality of the pages in later chapters. The app will have

Answer:

the total mass of the objects multiplied by their velocity.

The mechanism that is responsible for the formation of snowflakes is the nucleation of ice crystals.

This is defined as a piece of snow which falls from the sky as a result of an extremely cold climate condition and is common in the arctic regions of the world.

Snow flakes are formed when ice crystals stick together to form the flakes which usually has a dust or pollen being formed around the area being talked about.

This is also regarded as a type of precipitation such as rain etc and is therefore the most appropriate choice.

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The force acting upon the car is 0.691N. Yes, the frictional force will cause a change in acceleration; the presence of friction reduces the acceleration from 9.8 m/s^2 to 8.3 m/s^2.

Newton's second law of motion states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. This law is expressed mathematically as F = ma, where F is the net force acting on an object, m is its mass, and a is its acceleration.

c. The force acting upon the car can be found using Newton's Second Law. In this case, we know the weight of the car is 3.92N, which is equal to its mass times the acceleration due to gravity (9.8 m/s^2). Therefore, the mass of the car is 3.92N / 9.8 m/s^2 = 0.4 kg.

To calculate the force acting upon the car, we need to consider the forces acting on it. The force applied to the car is the driving force, which is causing the car to move forward. The force of friction, which is equal to the coefficient of friction (µ) multiplied by the normal force (N), is acting in the opposite direction to the driving force, and is reducing the car's acceleration. The normal force is equal to the weight of the car, which is 3.92N.

The force of friction is given as 0.5N, and the coefficient of friction is not given. We can use the equation of motion to calculate the force acting upon the car:

F = ma + µN

F = (0.4 kg)(0.5 m/s^2) + µ(3.92N)

F = 0.2N + µ(3.92N)

To find µ, we can use the fact that the car is just about to move, so the force of friction is equal to the maximum static friction force, which is µsN. Therefore, µsN = 0.5N, and µs = 0.5N / 3.92N = 0.128.

Substituting this value into the equation for force, we get:

F = 0.2N + (0.128)(3.92N) = 0.691N

Therefore, the force acting upon the car is 0.691N.

d. Yes, the frictional force will cause a change in acceleration. This can be calculated mathematically by subtracting the force of friction from the driving force and dividing by the mass of the car:

a = (F - µN) / m

a = (3.92N - 0.5N) / 0.4 kg

a = 8.3 m/s^2

If the car were on a frictionless surface, the acceleration would be equal to the driving force divided by the mass of the car, which would be:

a = F / m

a = 3.92N / 0.4 kg

a = 9.8 m/s^2

Therefore, the presence of friction reduces the acceleration from 9.8 m/s^2 to 8.3 m/s^2.

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In order to determine the density of a cylinder, we need to know its mass and volume. The mass of the cylinder is given as 29.2 grams, but the volume is not provided. Without the volume, it is impossible to calculate the density of the cylinder.

As for whether or not the cylinder will float in water, that also depends on its density. If the density of the cylinder is less than the density of water (1), then it will float. However, without knowing the density of the cylinder, it is impossible to determine whether or not it will float in water.

The average emf induced in the coil is 0. 533 V. The average emf induced in the coil can be calculated using Faraday's law of electromagnetic induction. The formula for the average emf induced in a coil is given by:

E = N * (ΔΦ / Δt)

where E is the average emf, N is the number of turns in the coil, ΔΦ is the change in magnetic flux, and Δt is the time interval.

In this case, the number of turns is 80, and the time interval is 0.0600 s. The change in magnetic flux can be calculated by finding the initial and final flux values.

The initial flux is given by Φ1 = B * A * cos(θ1), where B is the magnetic field, A is the area of the coil, and θ1 is the angle between the coil and the magnetic field.

The final flux is given by Φ2 = B * A * cos(θ2), where θ2 is 90 degrees since the coil is perpendicular to the field.

Substituting the values into the formula, we have:

\(E = 80 * (Φ2 - Φ1) / Δt\)

Calculating the values, we find:

\(Φ1 = (1.10 T) * (0.25 m) * (0.40 m) * cos(37.0°) = 0.536 WbΦ2 = (1.10 T) * (0.25 m) * (0.40 m) * cos(90°) = 0.110 WbΔΦ = Φ2 - Φ1 = 0.110 Wb - 0.536 Wb = -0.426 Wb\)

Substituting the values into the formula, we get:

E = 80 * (-0.426 Wb) / 0.0600 s = -0.568 V

Taking the absolute value, the average emf induced in the coil is 0.568 V or approximately 0.533 V.

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Answer:

a = 2.25 m/s^2

Explanation:

The solution is in the image. Also, knowing this picture is from a Schoology assessment page, if this is a test, try to solve the question yourself before asking for help. Also, specify which part you need help on.

Answer:

4 amp

Explanation:

From ohm's law,

V=IR

so,

I=V/R

I=120/30

I=4amp ans..

The centripetal force experienced by the towel is 55 N.

The given parameters;

The centripetal force experienced by the towel spinning along the walls of the drum is calculated as follows;

Fc = mrω²

where;

Fc is the centripetal force

ω is angular speed in rad/s

The angular speed in rad/s is calculate as;

\(\omega = \frac{200 \ rev}{\min} \times \frac{2\pi \ rad}{1 \ rev} \times \frac{1\min}{60 \ s} \\\\\omega = 20.95 \ rad/s\)

The centripetal force experienced by the towel is calculated as;

\(F_c = mr\omega ^2\\\\F_c = 0.25 \times 0.5 \times (20.95)^2\\\\F_c = 54.9 \ N \ \approx 55 \ N\)

Thus, the centripetal force experienced by the towel is 55 N.

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Answer:

Displacement time graph for uniform motion is a straight line with non-zero slope. Displacement time graph for uniform acceleration is a parabola.

The payback time for cavity wall insulation can be calculated by dividing the cost of insulation by the annual savings. In this case, the cost of insulation is £240, and the annual savings are £32. So, the payback time can be calculated as Payback time = Cost of insulation / Annual saving Payback time = £240 / £32 Payback time = 7.5 years

The payback time for cavity wall insulation is 7.5 years. This means that it will take 7.5 years to recover the initial cost of insulation through the savings in energy bills. After the payback period, the savings will continue to add up, resulting in significant long-term savings. It is important to note that the payback time may vary depending on the insulation cost and the amount of savings, and it is always a good idea to evaluate the potential savings before investing in any energy efficiency measure.

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Balanced chemical equation is : Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

The balanced chemical equation represents the reaction between solid calcium hydroxide (Ca(OH)₂) and aqueous hydrochloric acid (HCl). The equation shows that one mole of calcium hydroxide reacts with two moles of hydrochloric acid to produce one mole of calcium chloride (CaCl₂) and two moles of water (H₂O).

In the equation, the subscripts indicate the number of atoms present in each molecule. Calcium hydroxide consists of one calcium (Ca) atom, two oxygen (O) atoms, and two hydrogen (H) atoms. Hydrochloric acid contains one hydrogen (H) atom and one chlorine (Cl) atom. Calcium chloride is composed of one calcium (Ca) atom and two chlorine (Cl) atoms. Water consists of two hydrogen (H) atoms and one oxygen (O) atom.

The coefficients in the balanced equation indicate the relative amounts of each compound involved in the reaction. In this case, one mole of calcium hydroxide reacts with two moles of hydrochloric acid to produce one mole of calcium chloride and two moles of water.

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Answer:

The answet is B. Hope thia is right! btw this is also my lesson xD

Answer:

When atoms from different elements are joined together in groups, they form molecules. The atoms in molecules bind together chemically, which means that the atoms cannot be separated again by physical means, such as filtration. The molecule has different properties from the elements from which is was made.

Explanation:

Answer: C

Explanation:

c is the right answer try

The referee should award a goal to the attacker since the part of the body in contact with the ball is not hand and it cannot be considered as handball.

There are several rules considered during a game of soccer before the referee will award goal.

The shoulder area ABOVE the armpit is not part of the hand, thus the referee should award a goal to the attacker since the part of the body in contact with the ball is not hand and it cannot be considered as handball.

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At the instant shown, the six scenarios can be ranked in terms of the magnitude of current in the light bulb as follows:

1) Scenario 1 - Here, the battery is directly connected to the light bulb without any other resistors in the circuit. Therefore, the current flowing through the bulb will be the maximum among all the scenarios.

2) Scenario 3 - In this case, the battery is connected to the light bulb through a resistor. However, the resistance is less compared to other scenarios, so the current will be higher than in other cases.

3) Scenario 4 - Here, the battery is connected to the light bulb through a higher resistance compared to scenario 3. This will result in a lesser current in the bulb.

4) Scenario 5 - In this scenario, the battery is connected to the light bulb through a much higher resistance than in the previous two scenarios. Therefore, the current flowing through the bulb will be lower.

5) Scenario 6 - Here, the battery is connected to the circuit in such a way that the current will bypass the light bulb. Therefore, the bulb will not light up and the current flowing through it will be zero.

6) Scenario 2 - This scenario is similar to scenario 6 where the switch is open, so the circuit is not complete, and hence there will be no current flowing through the light bulb.

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The speed of the raft when the 40 kg boy dives horizontally off it at a speed of 4.0 m/s is 0.60 m/s.

According to the law of conservation of momentum, the total momentum before the boy jumps off the raft is equal to the total momentum after he jumps off. The momentum of an object is given by the product of its mass and velocity.

Let the initial velocity of the raft be v (which is what we need to find), and the final velocity of the boy be v_boy = 4.0 m/s. The mass of the boy is 40 kg, and the mass of the raft is 600 kg.

Before the boy jumps off, the total momentum is the sum of the momentum of the boy and the momentum of the raft. After the boy jumps off, the momentum of the boy becomes zero, and only the momentum of the raft remains.

The initial momentum is given by the product of the mass and velocity of the boy: momentum_initial = 40 kg * 4.0 m/s.

The final momentum is the product of the mass and velocity of the raft: momentum_final = 600 kg * v.

Since momentum is conserved, we can equate the initial momentum to the final momentum: momentum_initial = momentum_final.

40 kg * 4.0 m/s = 600 kg * v.

Simplifying the equation, we find: v = (40 kg * 4.0 m/s) / 600 kg.

Calculating this, we get v ≈ 0.2667 m/s, which can be rounded to 0.26 m/s.

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Answer: parasitic organisms cause harm to other organisms.

Answer:

parasitic organisms cause harm to other organisms.

Explanation:

To Make I the subject you need to get it by itself. To do this divide both sides by V and t:

I = E/Vt

The restoring force acting on the simple pendulum is -mg sinФ or -mgФ.

Mass of the bob = m

Angle made by the pendulum from its mean position = Ф

Length of the pendulum = L

Let the distance moved by the simple pendulum from its mean position be x.

So, we can write that,

sinΦ = x/L

for smaller angles, sin Φ ≈ Ф

Ф = x/L

The restoring force acting on the simple pendulum is,

F = -mgФ

F = -mgx/L

We know that, F = ma

So,

ma = -mgx/L

Therefore, the acceleration of the simple pendulum is,

a = -x(g/L)

We know that, ω = √(g/L)

So, g/L = ω²

Therefore,

a = -ω²x

where ω is the angular frequency of the pendulum.

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Take into account that the potential energy is given by the following formula:

U = m·g·h

where

m: mass = 80 kg

g: gravitational acceleration constant = 9.8m/s²

h: height = 7 m

Replace the previous values into the expression for the potential energy U:

U = (80 kg)(9.8 m/s²)(7 m)

U = 5,488 J

Hence, Bobby will have a potential enrgy of 5,844 J when he is a the top of a 7 m hill.

\( \huge{ \underline{ \underline{ \red{ \bf{Solution:}}}}}\)

We know that, Newton's second law of motion states that Force is the product of mass and Accleration which is actually derived from the original statement, Rate of change of momentum is directly proportional to Force applied and acts in the same direction of force.

According to this,

\( \large{ \cdot{ \boxed{ \rm{f = m \times a}}}}\)

Where,

So, By using formula,

➝ F = m × a

➝ 180 N = 15 kg × a

➝ 15a = 180

➝ a = 180/15 = 12 m/s²

❍ Accleration of the body = 12 m/s²

Hence, solved !!

━━━━━━━━━━━━━━━━━━━━

\(\tt {\pink{Given}}\begin{cases} \sf{\green{Force=180 \: newtons}}\\ \sf{\blue{Mass=15 \: kg}}\\ \sf{\orange{Acceleration= \: ?}}\end{cases}\)

Answer:

\(\qquad \: \tiny\dag\:\underline{\tt By \: applying \: Newtons \: second \: law \: of \: motion \: we \: get : } \\ \\ \)

\(:\implies\sf F = ma \\ \\ \)

\(\tt {\pink{Where}}\begin{cases} \sf{\green{F=Force}}\\ \sf{\blue{m=Mass}}\\ \sf{\orange{a=Acceleration}}\end{cases}\)

\(\qquad\tiny\dag\:\underline{\tt Now,substituting\: the \: given \: values \: in \: above \: Formula \: we \: get :} \\ \\ \)

\(:\implies\sf 180 = 15 \times Acceleration \\ \\ \\ \)

\(:\implies\sf Acceleration = \dfrac{180}{15} \\ \\ \\ \)

\(:\implies \underline{ \boxed{\textsf{ \textbf{ Acceleration = 12 m/s$^2$ }}}} \\ \\ \\ \)

\(\therefore\underline{\textsf{ Acceleration produced by the box is \textbf{12 m/s$^2$}}}. \\ \)

Answer:

Scientists predict the location of electrons in the modern model of the atom by using the Heisenberg uncertainty principle.

They have a limited supply in nature, therefore if they are used excessively, they will become exhausted.

Today, we recognise that using fossil fuels has a negative impact on the environment. Fossil fuels produce and utilise local pollutants, and their continued use permanently alters the temperature of our entire world.

Wastes from combustion sources are those that result from carbon pollution (i.e., coal, oil, natural gas). Included in this are all ash and particles taken out of the flue gas.

The fossile fuel is limited in nature. So, it should not waste energy from fossil fuels.

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Answer: Speed

Explanation:

Speed is the time it takes something to travel a certain distance. Accelaration is the rate at which an object's speed changes. Velocity is a vector of the object's speed and direction.

B

Explanation:

yeah but I don't know what

Answer:

""gravity. the force that pulls on objects and causes acceleration if the objects are not balanced by an opposing force. speed. distance traveled per unit time. Newton's Second Law of Motion.""

Explanation:

Answer:

2

cos

(

x

)

−

√

3

=

0

2

cos

(

x

)

-

3

=

0

5

3

y

+

5

2

=

5

5

3

y

+

5

2

=

5

x

−

4

≥

0

Explanation:hopefully this helps you

The specific heat capacity of the metal is 32427.7 J/kg/°C if the mass of a metal is 50 gm.

The specific heat capacity of a substance is the heat required to increase the temperature of the substance of unit mass by one degree. Its SI unit is J/kg/°C.

Mass of the metal= 50 g= 0.05 kg

Temperature of the metal = 100°C

Mass of the water = 200 g = 0.2 kg

Mass of the calorimeter = 80 g =0.08 kg

Temperature of the calorimeter and water combined= 14°C

Equilibrium temperature = 70°C

Specific heat capacity of the copper = 390 J/kg/°C

Specific heat capacity of the water = 4187 J/kg/°C

Heat lost by the metal = heat absorbed by the water and calorimeter

0.05×S×(100-70) = (0.2×4187+0.08+390) × (70-14)

1.5×S = 48641.6

S= 32427.73 J/Kg/°C

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Answer:

this is step up transformer

Explanation: