1.Explain why "red hot" is not as hot as "blue hot"

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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Time of flight = 1.6 s

Horizontal distance = 64 m

Projectile motion is the form of motion experienced by an object or particle projected into a gravitational field, such as from the surface of the Earth, and moves along a curvilinear path only under the action of gravity.

For the given case,

h = vt + ¹/₂gt²

h = height of tower

v = initial velocity

t = time of flight

55 = 50sin30t + ¹/₂9.8t²

55 = 25t + 4.9t²

4.9t² + 25t - 55 = 0

t = 1.6 s

X = vₓt

X = horizontal distance

vₓ = horizontal velocity

t = time of flight

X =  (50 x cos30) x 1.6

X =  64 m

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Answer:

Pin, rightwards

Explanation:

Answer:

A. Autumn

Explanation:

Autumn is when all deer starts roaming around and causing car collisions.

Answer:

A

Explanation:

that's migrating season

b).  The power depends on the RATE at which work is done.  

Power = (Work or Energy) / (time)

So to calculate it, you have to know how much work is done AND how much time that takes.

In part (a), you calculated the amount of work it takes to lift the car from the ground to Point-A.  But the question doesn't tell us anywhere how much time that takes.  So there's NO WAY to calculate the power needed to do it.

The more power is used, the faster the car is lifted.  The less power is used, the slower the car creeps up the first hill.  If the people in the car have a lot of time to sit and wait, the car can be dragged from the ground up to Point-A with a very very very small power ... you could do it with a hamster on a treadmill.  That would just take a long time, but it could be done if the power is small enough.

Without knowing the time, we can't calculate the power.

...

d).  Kinetic energy = (1/2) · (mass) · (speed squared)

On the way up, the car stops when it reaches point-A.  

On the way down, the car leaves point-A from "rest".

WHILE it's at point-A, it has no speed.  So it has no (zero) kinetic energy.

When the string of the instrument is tightened then the length of the string decreases hence the pitch and frequency will increase so, option B is correct.

The frequency at which the sound waves that create a sound vibrate determines its pitch. High-frequency sound waves produce high-pitched noises, and low-frequency sound waves make low-pitched noises. The ability to discern between harsh and flat sounds is known as pitch.

A string will vibrate at a varied frequency depending on its length. Higher frequency and higher pitch are produced by shorter strings.

The pitch rises as the anxiety does as well. A string's length is also crucial. A string vibrates and makes music when it is supported at two points and pulled. The pitch of this string will, however, rise if the length is shortened.

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Answer:

Solar energy

Electrical energy

Explanation:

The energy type being transferred from the sun to the a powerbank is solar energy.

Solar energy is the energy that is derived from the sun. This energy originates from light energy cause the excitation and movement of electrons from  a surface. The streaming of electrons produces electrical energy.

The electrical energy is used to charge mobile phone and to power it.

So the energy conversion is from solar to electrical energy

A thermodynamic process is a chemical or physical process that takes place in a thermodynamic system, which changes the system from an initial state to a final state. There are different forms of thermodynamic processes. Isobaric and isovolumetric processes are two of these processes.

The key difference between the isobaric and isovolumetric processes is that the isobaric process occurs at constant pressure while the isovolumetric process occurs at constant volume.

The maximum work is developed when the pressure ratio is the same across each stage as Pi/P2 =  P1/Pi

Describe work.

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. That is called work. Work is a measure of energy transfer.

The definition of energy is the capacity for work. The work produced is consistent. There are many different types of energy, including kinetic and potential energy.

The turbine work ,w =(h 1−h a)(h b −h 2 )

                                   =cp [(T 1−Ta)+(T b−T 2 )]

As the temperature at the inlet at each stage is same: T 1=T b

So ​

turbine work ,w =  cp [(T 1−Ta)+(T b−T 2 )]

                           =  cp [2T1-Ta -T2]

                           =  cp*T1[2- Ta/at1 - T2/T1]

Ta/T1 = (Pi/P1)^x

T2/T1 = (P2/Pi)^x

and x =(k-1)/k

So , w =c p*T 1 [2−( P1/Pi)^ x−( Pi/P2)^x ]

In case of maximum work done , dw/di = 0

Substituting it in above equation gives:

P1*P2 = (Pi)^2x

Pi/P2 =  P1/Pi

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Aztecs took control of the valley of central Mexico, founded what would become the largest city in the western hemisphere, held warfare as a sacred ritual, and engaged in the gradual expansion of control over nearby societies

The Native Americans who ruled northern Mexico at the time of the Spanish invasion in the early 16th century were known as the Aztecs.

The nomadic Aztecs finally made their way to numerous little islands in Lake Texcoco, where they constructed Tenochtitlan, the forerunner of present-day Mexico City, in 1325.

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Answer:

\(\huge\underline\color{green}{Answer \: ☘}\)

In the case of a water wave in the ocean, the medium through which the wave travels is the ocean water. In the case of a sound wave moving from the church choir to the pews, the medium through which the sound wave travels is the air in the room.

hope helpful~

Answer:

Heat pump needs 1.965 megajoules each hour to run.

Explanation:

The Coefficient of Performance (\(COP\)), no unit, of a Carnot's heat pump is:

\(COP = \frac{Q_{H}}{W}\) (1)

Where:

\(Q_{H}\) - Heat received by the building, measured in megajoules.

\(W\) - Work needed to run the heat pump, measured in megajoules.

If heat pump is a Carnot engine working in reverse, then the amount of work needed to run the heat pump is the least possible work. If we know that \(Q_{H} = 7.27\,MJ\) and \(COP = 3.70\), then the amount needed by the heat pump each hour is:

\(W = \frac{Q_{H}}{COP}\)

\(W = \frac{7.27\,MJ}{3.70}\)

\(W = 1.965\,MJ\)

Heat pump needs 1.965 megajoules each hour to run.

The amount of time which the impetus was implemented is 3.04 seconds.

The momentum of the automobile is 34124.26 kg*m/s.

In order to figure out the time, the following formula for impulse can be applied: impulse = force x time. Reformulating and rearranging this equation, we reach the derivative of time = impulse / force. With the provided calculations of 536.49 N*s divided by 176.32 N, these figures conclude that the amount of time which the impetus was implemented is 3.04 seconds.

Additionally, we can use the formula of momentum = mass x velocity to further determine the vehicular testament of import. When applying these specified numbers of 2546.9 kg and 13.4 m/s respectively, the momentum of the automobile is 34124.26 kg*m/s.

momentum = 2546.9 kg x 13.4 m/s

= 34124.26 kg

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Answer:

86.7

Explanation:

sana makatulong yung answer ko

Answer:

75 hz

Explanation:

Trust

The next frequency will be 75.0 Hertz

Wait, how do you know if it is correct?!

Well, it is correct for Acellus:)

Try it in other schools/academies:)

Answer:

Explanation:

Mass of disk = 0.14 kgSpring constant = 155 N/mLength = 4 cmWe need to calculate the speed Using energy conservationWhere, k = spring constantx = compressed lengthm = mass of the discPut the value into the formulaHence, The speed with which the disk slides across the surface is 1.33095 m/s.

The spring potential energy is included in the initial potential energy term in the equation KEi + PEi + WNC= KEf + PEf.

The formula for calculating the potential energy of a spring is PE = (1/2)kx^2, where k is the spring constant and x is the displacement of the spring from its equilibrium position.

The spring constant (k) determines the stiffness of the spring and how much force is required to stretch or compress it. The greater the spring constant, the more potential energy is stored in the spring for a given displacement from its equilibrium position. This means that a spring with a higher spring constant will have a greater potential energy than a spring with a lower spring constant when stretched or compressed by the same amount.

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Answer:

Genes provide instructions for making proteins but they do not build the proteins themselves. Why do some organisms make one type of protein for a feature and others make two? An organism has two copies of a gene for each feature; these can be the same version or different.

Explanation:

The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C

To calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.

However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.

Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.

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Answer:

The value is  \(v_o = 5.488 \ m/s\)

Explanation:

From the question we are told that

     The emitted frequency increased by \(\Delta f = 1.6 \% = 0.016 \\)

Let assume that the initial value of the emitted frequency is

      \(f = 100\% = 1\)

Hence new frequency will be  \(f_n = 1 + 0.016 = 1.016\)

Generally from Doppler shift equation we have that

         \(f_1 = [\frac{ v \pm v_o}{v \pm + v_s } ] f\)

Here v  is the speed of sound with value  \(v = 343 \ m/s\)

         \(v_s\) is the velocity of the sound source which is \(v_s = 0 \ m/s\) because it started from rest

         \(v_o\)  is the observer velocity So

Generally given that the observer id moving towards the source, the Doppler frequency becomes

                   \(f_1 = [\frac{ v + v_o}{v + 0 } ] f\)

=>                \(1.016 = [\frac{ 343 + v_o}{343 } ] * 1\)  

=>                \(v_o = 5.488 \ m/s\)

Answer:

Radiant energy passes the earth's system boundary, but not mass

Explanation:

Took the quiz and got it correct!

Good Luck

Answer:

Radiant energy passes the system boundary but not mass

Explanation:

I took the quiz on k12

Answer:

Rapid human population growth has a number of consequences. Population grows fastest in the world's poorest countries. High fertility rates have historically had a strong relation with poverty, and high childhood mortality rates

Explanation:

i got it from goo.gle but i hope that helps:)

have a good day bro

Answer:

\(V_3\approx 4.28\,\,V\)

\(I_1=0.0572\,\,amps\)

\(I_3\approx 0.171\,\,amps\)

Explanation:

Notice that this is a circuit with resistors R1 and R2 in parallel, connected to resistor R3 in series. It is what is called a parallel-series combination.

So we first find the equivalent resistance for the two resistors in parallel:

\(\frac{1}{Re}= \frac{1}{R1}+\frac{1}{R2}\\\frac{1}{Re}= \frac{1}{100}+\frac{1}{50}\\\frac{1}{Re}= \frac{3}{100}\\Re=\frac{100}{3} \,\,\Omega\)

By knowing this, we can estimate the total current through the circuit,:

\(Vs=I\,*\,(\frac{100}{3} +25)\\10=I\,*\,\frac{175}{3} \\I=\frac{30}{175} \,amps\)

So approximately 0.17  amps

and therefore, we can estimate the voltage drop (V3) in R3 uisng Ohm's law:

\(V_3=\frac{30}{175} *\,25=\frac{30}{7} \approx 4.28\,\,V\)

So now we know that the potential drop across the parellel resistors must be:

10 V -  4.28 V = 5.72 V

and with this info, we can calculate the current through R1 using Ohm's Law:

\(I_1=\frac{V_1}{R_1} =\frac{5.72}{100} =0.0572\,\,amps\)

Answer:

poop bear cookie

Explanation:

Answer:

The expansion of the universe has caused cosmic microwave background radiation to cool. As the universe expands, the radiation is stretched out, causing its wavelength to increase and its temperature to decrease. This phenomenon is known as cosmic microwave background radiation redshift.

the answer is D. It has caused it to red-shift.

The x and y component of the ball's final velocity are respectively 7.35 m/s and  4.90 m/s.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Given that:

Mass of the ball: M = 6.35 kg.

Initial velocity of ball: U = 8.49 m/s.

Mass of the pin at rest: m = 1.59 kg.

Final velocity of pin: v = 20.1 m/s at a -77.0° angle.

Let the x and y component of the ball's final velocity are respectively V₁ m/s and  V₂ m/s.

Appling conservation of momentum along x axis:

MU + m.0 = MV₁ + mvcos(-77.0°)

⇒ V₁ = u - (m/M) v cos(-77.0°)

After putting the values we get:

V₁ = 7.35 m/s.

Appling conservation of momentum along y-axis:

M.0 + m.0 = MV₂ + mvsin(-77.0°)

⇒ V₂ = - (m/M) vsin(-77.0°)

After putting the values we get:

V₂ = 4.90 m/s.

Hence, the x and y component of the ball's final velocity are respectively 7.35 m/s and  4.90 m/s.

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Answer:

R₁ = 0.126 m

Explanation:

Let's use the definition of intensity which is the power per unit area

          I = P / A

the generated power is constant

          P = I A

power is

         P = E / t

if we perform the calculations for a given time, the wave energy is

        E = q V

we substitute

        P = \(\frac{q V\ A}{t}\)

we can write this equation for two points, point 1 the antenna and point 2 the receiver

         V₁A₁ = V₂A₂

          A₁ = \(\frac{V_2}{V_1} \ A_2\)

          A₁ = 0.1 10⁻³  5 10⁻⁴ /V₁

          A₁ = 5 10⁻⁸ /V₁

In general, the electric field on the antenna is very small on the order of micro volts, suppose V₁ = 1 10⁻⁶ V

let's calculate

          A₁ = 5 10⁻⁸ / 1 10⁻⁶

         A₁ = 5 10⁻² m²

the area of ​​a circle is

          A = π r²

we substitute

         π R1₁²= 5 10⁻²

         R₁ = \(\sqrt{ \frac{5 \ 10^{-2} }{\pi } }}\)

         R₁ = 0.126 m

We can deduce here that the maximum horizontal force that you can apply to the box is 150 pounds. Thus, the heaviest box that you can push up the ramp at a constant speed is 75 pounds.

Given the following:

Maximum horizontal force = 150 pounds

Coefficient of kinetic friction = 0.50

Weight of the box = 150 pounds

Angle of the ramp = 60°

Normal force = Weight of the box * Cosine of the angle of the ramp

= 150 pounds × Cos(60°)

= 75 pounds.

Force of friction = Coefficient of kinetic friction × Normal force

= 0.50 × 75 pounds

= 37.5 pounds

Maximum force that can be applied to the box = Weight of the box × Cosine of the angle of the ramp - Force of friction

= 150 pounds × Cos(60°) - 37.5 pounds

= 75 pounds

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