List the 4 things technology can be.

About 4.5 mol of water will be created when the platinum-based engine is run continuously at 300 K for an hour with 0.5 atm of H2 and 0.5 atm of O2 injected for each reaction.

For fuel cell engines' electrodes, platinum is a requirement. It acts as an electrocatalyst to speed up the electrochemical reactions needed to induce H2 to release electrons and form H2 ions when it is placed on porous electrodes.

Platinum is particularly well suited as a fuel cell catalyst because it makes it possible for the hydrogen and oxygen reactions to occur at an ideal rate and because it is stable enough to withstand both the intense electrical current density and the complex chemical environment found inside a fuel cell. This allows platinum to function effectively over an extended period of time.

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The fundamental frequency, or first harmonic, is the lowest frequency at which a string might vibrate and produce a standing wave pattern.

In the transverse situation, traveling waves have high points called crests and low points called troughs. In the longitudinal case, traveling waves have compressed points called compressions and stretched points called rarefactions.

Through the equation f = v, where v represents the speed of the waves along the string, wavelength and frequency are connected. The frequency increases with decreasing wavelength for a given value of v.

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The Statement is False An endothermic reaction with positive entropy change can be spontaneous only at high temperatures, rather than at low temperatures.

The spontaneous endothermic reaction is characterized by a positive entropy (ΔS > 0) and a positive enthalpy (ΔH > 0) of the reactants. Since ΔH and ΔS have the same sign, the sign of ΔG determines whether the reaction is spontaneous or non-spontaneous.

Only if ΔG < 0, then the reaction will proceed spontaneously. In contrast, ΔG > 0 makes the reaction non-spontaneous, whereas ΔG = 0 makes the reaction at equilibrium.

Therefore, to have a spontaneous endothermic reaction, ΔH must be higher, meaning the amount of energy entering the system is greater than the amount of energy being produced.  

However, in the presence of a large positive ΔS, the temperature required for the reaction to become spontaneous is lower.

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Answer:

ca taode na kadato itoi runa ko

Answer:

Explanation:

Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.

Frequency= no. of oscillations/time=40/60sec

4/6=0.66

The deflecting electric field is 0.83mv/m

Acc. to the newtons 2nd law - there is an acceleration when a force acts on an object.

F = ma     (equation 1)

where

F is force

m is mass of object

a is acceleration

Electric field intensity- it is defined as force experienced by a unit positive charge placed at that point.

it is denoted by E = F/q

where

F is force

q is the charge

F = Eq     (equation2)

from 1 and 2 equation we get

ma = Eq

E = ma /q

Charge on the drop of ink.is q.

(e is the charge on an electron.)

so,

q = 751896×e

q = 751896×1.6 ×⁻¹⁹

q = 12.03 ×10⁻¹⁴

m = 10⁻¹¹kg

a = 10⁴ m/s²

using above values

E = ma /q

E = 10⁻¹¹×10⁴/12.03 ×10⁻¹⁴

E = 0.83mv/m

The deflecting electric field is 0.83mv/m

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The pressure for CO₂ will be 0.75atm when volume remains unchanged.

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.

PV = nRT

\(\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }\)

\(P_{1} = \frac{1.05atm}{273K} * (194.5K)\)

P1 = 0.748atm

which on round figure gives us,

P1 = 0.75 atm

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The magnetic field tilts of Earth and Uranus are considered to be the most unusual when compared to other celestial bodies in our solar system. Earth's magnetic field tilts at an angle of approximately 11 degrees with respect to its rotational axis, which is quite significant. The magnetic field is generated by the motion of molten iron in the Earth's outer core, which creates a magnetic dipole that is tilted with respect to the planet's rotation axis.

Uranus, on the other hand, has an extremely tilted magnetic field that is almost perpendicular to its rotational axis. This is believed to be due to the planet's unique orientation, as Uranus rotates on its side compared to the other planets in our solar system. The magnetic field is thought to be generated by a layer of electrically conductive fluids deep within the planet's interior, which may be influenced by the unusual orientation of Uranus.

Overall, the magnetic field tilts of Earth and Uranus are intriguing and unique in their own ways, providing valuable insights into the magnetic processes that occur within these celestial bodies.

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Answer: It's D.

Explanation:

I just did it.

The system has parts that sense the amount of output, allows negative feedback to control a system. Option D is correct.

A system is a collection of interconnected or interacting pieces that follow a set of rules to produce a coherent whole.

The limits, structure, and purpose of a system, which is surrounded and impacted by its environment, are characterized and expressed in its functioning.

A feedback system helps the system to work in the productive way. Negative comments might help you get back on track. It allows you to view projects and activities in a new light.

It allows you to learn, grow, and improve anything from your own talents to the project you're working on right now.

The system has parts that sense the amount of output, allows negative feedback to control a system.

Hence, option D is correct.

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0.268 because grams are 1000 times bigger than mg

1 milligram = 0.001 grams

268.0mg * 0.001g

\(=\fbox{0.268 grams}\)

The soda cans and hardwood spoons in objects II and III can be categorised as having good electrical conductivity and having poor electrical conductivity, respectively.

Pure silver is the best conductor of electricity, but unsurprisingly, it is not one of the metals that is used to transmit electricity most frequently. There are a few disadvantages to the widespread use of purified silver.

Silver, copper, and gold are the metals with the highest conductivity. For instance, copper is widely used in metal wiring and is extremely conductive. Brass, on the other hand, has copper in it, but the other components of its composition make it less conductive.

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Answer:-These small plants that Paheli saw are weeds and they grow from the seeds dispersed by birds when they come and sit in the garden.

Explanation: Weeds are considered to be a bane for gardeners as these rampantly grow in gardens and hijack the nutrition provided to plants and hinder the latter's growth.

Answer:

D 100kg

Explanation:

\(1n = 10kg \\ 10n = g \\ g = 10n \times 10kg \\ = 100kg\)

Answer:

a. 6.39 s b. 255.6 m c. 62.6 m/s

Explanation:

a. Find the time it takes to hit the ground.

Using y = ut + 1/2gt² where y = height of cliff = 200 m, u = initial vertical velocity of ball = 0 m/s, g = acceleration due to gravity = 9.8 m/s² and t = time taken for ball to hit the ground.

So, substituting the values of the variables into the equation, we have

200 m = 0 m/s × t + 1/2 × 9.8 m/s² × t²

200 m = 0 + (4.9 m/s²)t²

200 m = (4.9 m/s²)t²

dividing both sides by 4.9 m/s², we have

t² = 200 m ÷ 4.9 m/s²

t² = 40.82 s²

taking square root of both sides, we have

t = √(40.82 s²)

t = 6.39 s

b. Find the RANGE, distance traveled horizontally.

The range is the horizontal distance traveled by the ball, R = vt where v = horizontal velocity of ball = 40 m/s and t = time taken for ball to hit the ground = 6.39 s

So, R = vt

= 40 m/s × 6.39 s

= 255.6 m

c. Find the final vertical velocity.

Using v = u - gt where u = initial vertical velocity of ball = 0 m/s, v = final velocity of ball, g = g = acceleration due to gravity = 9.8 m/s² and t = time taken for ball to hit the ground = 6.39 s.

So, substituting the values into the equation, we have

v = 0 m/s - 9.8 m/s² × 6.39 s

v = -62.62 m/s

v ≅ -62.6 m/s

Answer:

\(5\; {\rm m\cdot s^{-1}}\).

Explanation:

Displacement is the change in position. In this example, the position of this ball changed from the initial value of \(x_{0} = (-5)\; {\rm m}\) to the final value \(x_{1} = 0\; {\rm m}\). Subtract the initial position from the final position to find the change in position:

\(\begin{aligned} & (\text{Displacement}) \\ =\; & (\text{Change in Position}) \\ =\; & (\text{Final Position}) - (\text{Initial Position}) \\ =\; & 0\; {\rm m} - (-5)\; {\rm m} \\ =\; & 5\; {\rm m} \end{aligned}\).

Velocity is the rate of change in position. To find average velocity (average rate of change in position), divide the total change in position (displacement) by the time required for the change:

\(\begin{aligned} & (\text{Average Velocity}) \\ =\; & \frac{(\text{Total Change in Position})}{(\text{Time Required})} \\ =\; & \frac{(\text{Displacement})}{(\text{Time Required})}\\ =\; & \frac{5\; {\rm m}}{1\; {\rm s}} \\ =\; & 5\; {\rm m\cdot s^{-1}} \end{aligned}\).

Therefore, the average velocity will be \(5\; {\rm m\cdot s^{-1}}\).

Answer:

1. stomach

2. arteries

3. trachea

4. spinal cord

Answer:

friction I would guess? you didnt leave any options.

Explanation:

The new velocity v of the trolley after the object is dropped onto it is 2 m/s.

Initial momentum of the system = mass of trolley x velocity of trolley

= 3 kg x 3 m/s

= 9 kg m/s

After the object is dropped onto the trolley, the total mass of the system becomes 3 kg + 1.5 kg = 4.5 kg. Let's assume the velocity of the trolley and object after the collision is v. By conservation of momentum, we can say:

Initial momentum = Final momentum

9 kg m/s = 4.5 kg x v

v = 2 m/s

Therefore, the new velocity v of the trolley after the object is dropped onto it is 2 m/s.

Using Newton's second law, we can calculate its acceleration:

acceleration of cart X = force / mass

= 1.5 N / 0.75 kg

= 2 m/s²

For cart Y, the force acting on it is 3.0 N, and its mass is also 0.75 kg. Using Newton's second law, we can calculate its acceleration:

acceleration of cart Y = force / mass

= 3.0 N / 0.75 kg

= 4 m/s²

Therefore, cart Y has the greater acceleration.

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The space shuttle travels approximately 0.00794 football fields in one blink of an astronaut's eye.

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The correct answer is opposite to the displacement.

The spring force is the force which is exerted by the spring when it is attached with an object.

When we attach a spring to an object and the object is displaced from equilibrium, then there will be a force acting on the spring which will retract the spring to come back to equilibrium.

This is spring force.

According to the Newton's third law, there is always an equal and opposite force. Here, if we are applying a force to displace the object. This force is applied on the object so it is towards the object. Then there is an equal and opposite force which is applied on the spring which tends to pull the object back to its equilibrium position. This force which acts opposite to the displacement of the object to bring spring back to equilibrium is the spring force.

Therefore, we can conclude that, in general, the spring force always points opposite to the displacement from equilibrium.

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NOT an event horizon is its binary counterpart, which transports matter to it.

To refer to the item or person that is the target of an action, we typically use the word "object." Alternatively, the recipient. In a sentence, a verb's action is transferred to a noun or pronoun as a direct object. It typically responds to the what- or whom-questions regarding the verb.

Icons, cursors, buttons, sprites, and other complicated artworks can be made from a collection of simple visual pieces called image objects. Without having to sketch a single pixel, Image Objects let you express creativity.

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Answer:

Gravitational potential=mgh

=50×10×2.5

=1250J

option a

Using the arctan function, we can calculate the angle using the formula θ = arctan(Fy/Fx). The result will be in radians, so to express it in degrees, we can multiply it by 180/π (approximately 57.3 degrees).

The direction angle of the force that the charged sphere exerts on the line of charge can be determined using trigonometry. We can consider the x-axis as the reference line and measure the angle counterclockwise from the x-axis towards the y-axis.
To find the direction angle, we need to determine the relationship between the x and y components of the force. If we have the magnitudes of the x and y components, we can use the inverse tangent function to find the angle.
Let's say the x-component of the force is Fx and the y-component is Fy. To find the direction angle, we can use the following formula:
θ = arctan(Fy/Fx)
where θ represents the direction angle. The arctan function will give us the angle in radians. To express the answer in degrees, we need to convert it by multiplying it by 180/π (approximately 57.3 degrees).
Therefore, the direction angle of the force that the charged sphere exerts on the line of charge can be found by calculating the arctan(Fy/Fx) and then converting the result to degrees.
The direction angle of the force that the charged sphere exerts on the line of charge can be determined using trigonometry. By measuring the angle counterclockwise from the x-axis towards the y-axis, we can find the direction in which the force is acting. To do this, we need to consider the x and y components of the force.

Let's say the x-component of the force is Fx and the y-component is Fy. Using the arctan function, we can calculate the angle using the formula θ = arctan(Fy/Fx). The result will be in radians, so to express it in degrees, we can multiply it by 180/π (approximately 57.3 degrees). This will give us the direction angle of the force exerted by the charged sphere on the line of charge.

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The vehicle travels 135 m in 6 sec while slowing down gradually at a speed of -3.5 m/s².

Using the equations of motion, we can determine how far the car traveled in 6 seconds while slowing down at a constant rate of -3.5 m/s2. In this scenario the initial velocity (u) is 33 m/s, the acceleration (a) is negative 3.5 m/s2 (deceleration), and the time (t) is 6 seconds.

To determine the final velocity (v) we must use the first equation:

v = u + at

v = 33 + (-3.5) * 6

v = 33 - 21

v = 12 m/s

Next, we can find the distance covered using the equation for distance:

s = ut + (1/2)at²

s = 33 * 6 + (1/2) * (-3.5) * (6²)

s = 198 + (-3.5) * 18

s = 198 - 63

s = 135 meters

As a result, the vehicle travels 135 m in 6 sec while slowing down gradually at a speed of -3.5 m/s².

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The molar mass of a compound can be found by adding the molar masses of all of the atoms in the compound.

The molar mass of an atom can be found on the periodic table by looking at the atomic mass listed for that element.

For example, to find the molar mass of water (H2O), we would add the molar masses of two hydrogen atoms (2 x 1.01 g/mol) and one oxygen atom (16.00 g/mol) to get a total molar mass of 18.02 g/mol.

Another way is by finding the molecular formula of the compound, it can be done by analyzing the compound's chemical and physical properties and then using the mass spectrometer to determine the molecular weight.

In conclusion, the molar mass of a compound can be found by adding the molar masses of the atoms in the compound using the atomic masses listed on the periodic table, or by determining the molecular formula of the compound and using a mass spectrometer to find the molecular weight.

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Answer:

B. 24.2 m/s

Explanation:

Given;

mass of the roller coaster, m = 450 kg

height of the roller coaster, h = 30 m

The maximum potential energy of the roller coaster  due to its height is given by;

\(P.E_{max} = mgh\\\\PE_{max} = 450 *9.8*30\\\\PE_{max} = 132,300 \ J\)

\(P.E_{max} = K.E_{max} \ (law \ of \ conservation\ of \ energy)\)

\(K.E_{max} = \frac{1}{2}mv_{max}^2\\\\ v_{max}^2 = \frac{2K.E_{max}}{m}\\\\ v_{max}^2 = \frac{2*132300}{450}\\\\ v_{max}^2 =588\\\\v_{max} = \sqrt{588}\\\\ v_{max} = 24.2 \ m/s\)

Therefore, the maximum speed of the roller coaster is 24.2 m/s.

Answer:

1. 24.2 m/s

2. 20.4 m

3. 22.5 m/s

4. 109,375 J

5. It is easy to calculate new scenarios.

Explanation:

5/5 on the Maximum Energy Quick Check

Explanation:

thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat the flow of thermal energy

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Answer:

.516

Explanation:

I typed this into Acellus and it was correct.

Answer: The answer is The maximum temperature is 172°C

Explanation: