ist Law of Thermodynamics
Question 2 of 10
What is the change in internal energy if 20 J of heat is released from a system
and the system does 50 J of work on the surroundings?
Use AU = Q-W.
A. 30 J
B. 70 J
C. 30 J
D. -70J

Answer:

Physical

Explanation:

The physical properties of a substance change, but the identity of the substance doesn't change

The current flowing through resistor R1 since resistors in series have the same current running through them is the current flowing from the battery through the complete circuit.

To find the current flowing through resistor R1, first we need to trаce the current flowing from the bаttery through the complete circuit. The given resistors аre in series, which meаns they аre connected end-to-end, so the sаme current flows through both of them. Thus, the current flowing through the complete circuit is:

I = V/Rtotаl

where I is the current, V is the voltаge of the bаttery, аnd Rtotаl is the totаl resistаnce of the circuit.To find the totаl resistаnce of the circuit, we need to аdd the resistаnces of both resistors in series:

Rtotаl = R1 + R2

Thus, the current flowing through the complete circuit is:

I = V / (R1 + R2)

Now, to find the current flowing through resistor R1, we use Ohm's Lаw, which stаtes thаt the current through а resistor is proportionаl to the voltаge аcross it аnd inversely proportionаl to its resistаnce. Thus:

I1 = V/R1

where I1 is the current flowing through resistor R1. Substituting the vаlue of V from the previous equаtion, we get:

I1 = I * R1 / (R1 + R2)

Therefore, the current flowing through resistor R1 is I1 = I * R1 / (R1 + R2)

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Answer:

Hey Again!

Your answer is 2450 cm3 !

Explanation:

Volume of cylinder = V=πr2h

2.45L = 2450mL

1mL = 1 cm cubed  

2450mL = 2450 cm cubed

*substitute values in*

I HOPE THIS HELPS YOU!!

Answer:

With regards to NASA's ambition to send humans to Mars, is an encouraging idea.  Also, the aim of sending food supply by unmanned spacecraft before the 2030 project though noble is filled with constraints and design problems.

For the constraints,

1. The spacecraft could be lost on the space before it reaches its destination being Mars. This is because, lack of communication between the control unit on earth and the spacecraft signify it being lost forever.

2. The food supply is bound to spoil on Mars since it would be stored unrefrigerated. This is as a result of the actions of the micro organisms acting on them.

For the criteria for the engineering design problem:

1. The distance between earth and Mars is very far

2. Not factoring in the preservation method into the unmanned aircraft.

Explanation:

Answer:

Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. The further away from the original source of a sound you are, the waves lessen until they don't have the strength to vibrate any other particles.

Explanation:

For a diode operating in the Zener region, the correct answer is d. I and IV.

1) Reverse voltage Vz is almost fixed at a value called "Zener Voltage": This statement is correct. In the Zener region, the reverse voltage across the diode remains nearly constant (Vz) regardless of changes in current.

II) Vp and I are both negative: This statement is not necessarily correct. In the Zener region, the voltage across the diode (Vp) can be positive or negative, depending on the polarity of the applied voltage. However, the current (I) is always in the reverse direction.

III) A large % change in Ip causes a very small % change in VD: This statement is not correct. In the Zener region, a change in the reverse current (Ip) can cause a significant change in the voltage across the diode (VD).

IV) Reverse current Iz is almost fixed: This statement is correct. In the Zener region, the reverse current (Iz) remains almost constant over a wide range of applied voltages (Vp).

Therefore, only statements I and IV are correct.

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Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Answer:

I don't know

Explanation:

The impulse on the car is 12 kg m/s. Impulse is the integral of the force applied on the object and the time period for which it is applied.

Impulse is the integral of a force, F, over the time interval, t, for which it acts on an object. Since, force is a vector quantity, therefore impulse is also a vector quantity because it has both the magnitude and direction. Impulse applied to an object produces an equivalent vector change in its linear momentum. The SI unit of impulse is the newton second (N⋅s) or kilogram meter per second (kg⋅m/s).

Impulse = Change in momentum

ΔP = F × ΔT

where, F = Force applied on the object,

ΔT = change in time

ΔP = Pf - Pi

where, ΔP = change in momentum,

Pf = final momentum = m × v,

Pi = initial momentum = m × u

Pf = 1.5 kg × 10 = 15 kg m/s

Pi = 1.5 × 2.0 = 3.0 kg m/s

ΔP = 15 - 3

ΔP = 12 kg m/s

Therefore, the impulse is 12 kg m/s.

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Answer:

your answer is 12.3

Explanation:

hope it helps : )

Answer:

4 N

Explanation:

mass = 2 kg

acceleration = 2 m/s^2

Force = mass * acceleration

         = 2 *2

         = 4 N

Answer:

416.6 KG

Explanation:

Due to the mass being missing from the equation you divide the force by the acceleration

The minimum temperature is found to be approximately 72.4 °C obtained using the Carnot efficiency equation.

The efficiency of an ideal heat engine operating between two reservoirs can be determined using the Carnot efficiency formula:

Efficiency = 1 - (T_cold / T_hot)

Where T_cold is the temperature of the cold reservoir (ambient temperature) and T_hot is the temperature of the hot reservoir.

To find the minimum temperature of the hot heat reservoir, we need to solve for T_hot. Rearranging the Carnot efficiency equation, we have:

T_hot = T_cold / (1 - Efficiency)

Substituting the given values, T_cold = 35.0 °C and Efficiency = 0.462, we get:T_hot = 35.0 / (1 - 0.462)

Calculating this expression, we find that the minimum temperature of the hot heat reservoir should be approximately 72.4 °C.

Therefore, in order to achieve at least 46.2 percent efficiency with the heat engine in an environment where the ambient temperature is 35.0 °C, the minimum temperature of the hot heat reservoir should be around 72.4 °C.

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Answer:

5 remainder 5

Explanation:

divide 120 by 2.3

To calculate the time it would take for information to travel a certain distance along a neuron, you can use the formula: Time = Distance / Speed.

Given that the information travels at 120 meters per second and the distance is 2.3 meters:

Time = 2.3 m / 120 m/s

Time ≈ 0.019167 seconds

To convert seconds to milliseconds, multiply by 1000:

Time in milliseconds ≈ 0.019167 s * 1000 ms/s ≈ 19.167 ms

So, it would take approximately 19.167 milliseconds for the information to travel 2.3 meters along a neuron.

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For a radius of diatomic molecules is approximately 2.3 ×10-10 m, the  pressure in Pa is mathematically given as

P=0.134Pa

Generally, the equation for the ideal gas  is mathematically given as

PV=nRT

Therefore

\(P=\frac{1kT}{\sqrt{2}\pi(p)d^2}\)

\(P=\frac{1.38*10^-23*293}{\sqrt{2}\pi*(2*1.3*10^{-10})^2)*0.1}\)

P=0.134Pa

In conclusion, Pressure

P=0.134Pa

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The horizontal displacement of the cannonball  is  65.75 meter.

Speed is characterized as the rate at which an object's position changes in any direction. The distance travelled in relation to the time it took to travel that distance is how speed is defined. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

original speed: u= 35.9 m/s.

acceleration due to gravity: g = 9.8 m/s².

Initial height of the cannonball = 166 m.

Hence,  the horizontal displacement of the cannonball = u²/2g

= 35.9²/(2×9.8) meter

= 65.75 meter.

so, the displacement of the cannonball  is  65.75 meter.

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(a) The budget constraint can be written as: C = wL + V, where C is consumption, w is the real wage, L is leisure, and V is non-labor market income.

(b) With ẞ = 1/2, V = 100, and w = 200, John's optimal supply of labor cannot be determined without information about his preferences for leisure and consumption. The utility function only represents his preferences, but we need additional information to determine the specific amount of labor he would choose to supply.

(c) John's total income is the sum of his labor income and non-labor market income: Total income = Labor income + Non-labor income = wL + V. Without knowing the specific value of L, we cannot calculate the total income.

(d) Similarly, without knowing John's preferences for leisure and consumption, we cannot determine the specific level of consumption he would choose.

(e) In the case where John is subject to a 10% income tax on labor income only, his new optimal supply of labor would depend on the tax rate's impact on his preferences and the trade-off between leisure and consumption. Without further information on his preferences and the specific tax structure, we cannot determine the new optimal supply of labor.

Additional information about John's preferences for leisure and consumption, as well as the specific tax structure, is necessary to calculate his optimal labor supply, total income, consumption, and the impact of the income tax on his labor supply.

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Answer:

The answers are red bone marrow and blood vessels.

Explanation:

Bone marrow is made of stem cells. These stem cells make red bone marrow, which creates blood cells and platelets for your blood.

Answer:

b

Explanation:

The speed of the car after 5 seconds, given that the car has a uniform acceleration of 2 m/s² is 10 m/s

The following data were obtained from the question:

The final speed of the car can be obtained as demonstrated below:

v = u + at

Inputting the various parameters, we have

v = 0 + (2 × 5)

Clear bracket

v = 0 + 10

v = 10 m/s

Thus, from the above calculation, we conclude that the speed after 5 seconds is 10 m/s

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Clear question:

A car starts at rest and has a uniform acceleration of 2 m/s² .Find the speed of the car the car after 5 seconds.

Answer:

3.141592653 im  king of NYC

Explanation:

We will have the following:

The labeled point in the diagram represents a trough.

True, some of the tiles in Byzantine mosaics were placed at an angle to reflect the light. This was done to enhance the visual appearance and create a dazzling effect.

Byzantine mosaics were used to decorate and embellish the walls, floors, and ceilings of buildings such as churches, palaces, and public places. They were made of small, colored, and shiny tiles called tesserae, which were arranged in various patterns to create intricate and sophisticated designs. One of the notable features of Byzantine mosaics was the use of tesserae at different angles to reflect the light and create a mesmerizing effect. The artists who created the mosaics were highly skilled and trained, and they knew how to use the properties of light to enhance their art. By placing the tiles at an angle, they could make the light bounce off the surface and produce a sparkling and radiant effect. The use of angles also allowed the artists to create depth, texture, and movement in their designs, which made them more dynamic and engaging. The Byzantine mosaics are still admired and revered for their beauty and craftsmanship, and they continue to inspire and influence artists and designers to this day.

In summary, some of the tiles in Byzantine mosaics were placed at an angle to reflect the light and create a dazzling effect. This technique was used by the artists to enhance the visual appearance and create depth, texture, and movement in their designs. The use of tesserae at different angles is one of the defining characteristics of Byzantine mosaics, and it reflects the skill and creativity of the artists who made them.

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The distance between two adjacent nodes in terms of the wavelength λ of the standing wave is B) The distance between the two adjacent nodes = λ/2.

A standing wave is a wave that appears to be standing still, resulting from the interference of two waves of identical wavelength and frequency traveling in opposite directions.

In standing waves, the nodes are located at fixed points of the wave, with no displacement at the nodes. Standing waves are created by the superposition of two waves of the same amplitude and frequency traveling in opposite directions in a medium, resulting in a wave that appears to be standing still.

The distance between the two adjacent nodes is equal to half of the wavelength λ of the standing wave, according to the formula,

Distance between the adjacent nodes = λ/2.

Therefore, option B is correct.

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Reptiles are not a monophyletic group because the taxon "birds" is not included.

Birds are descended from a common ancestor with other reptiles, but they have evolved many unique features and are now considered a distinct group within the larger clade of reptiles. Therefore, the traditional classification of reptiles, which includes turtles, snakes, lizards, crocodiles, and birds, is not monophyletic.

In order to create a monophyletic group that includes all the descendants of the most recent common ancestor of reptiles, birds must be included as a subgroup of reptiles. This revised classification is supported by modern molecular and genetic evidence.

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According to the data given in the question the net force on the box is of 5 N.

All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.

Given data :

Force on box to the left side (F1) = 15 N

Force on box to the right side (F2) = 20 N

Because both forces are in opposite direction

Hence,

Net force = F2 - F1

Net force = 20 - 15

Net force = 5 N.

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Answer:

v = 11061.02 km/h

Explanation:

Given that,

The radius of the circular orbit, r = 42250 km

Time taken to revolve around the Earth, t = 24 hours

We need to find the speed of the satellite. We know that, speed of an object is equal to total distance traveled divided by the time taken. So,

\(v=\dfrac{2\pi r}{T}\)

Put all the values,

\(v=\dfrac{2\pi \times 42250}{24}\\\\v=11061.02\ km/h\)

So, the speed of the satellite is equal to 11061.02 km/h.

The average acceleration vector of the ball is approximately 9.8 m/s² downward.

When the ball is thrown upward, it experiences a constant acceleration due to gravity pulling it downward. This acceleration is equal to 9.8 m/s², which is the acceleration due to gravity near the surface of the Earth. Since the ball reaches the same speed in the downward direction when it returns to the hand, we can conclude that its average acceleration vector is also 9.8 m/s² downward.

When the ball is thrown upward, it moves against the force of gravity. As it moves upward, the gravitational force slows it down until it reaches its highest point. At this point, the ball momentarily stops before reversing direction and falling back downward.

The force of gravity then acts in the same direction as the ball's motion, causing it to accelerate downward. The acceleration due to gravity remains constant throughout the ball's motion, regardless of its direction.

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