State the first law of thermodynamics and apply this to the system/surrounding model.

Answer:

38 220

Explanation:

Weight =Mg

W=Mg

W = (3900)(9.8)

W = 38 220

Answer: false

Explanation:

The internal brain processes required to make sense of the environment and choose the best course of action are the subject of cognitive psychology.

Complex attention, executive function, learning and memory, language, perceptual-motor control, and social cognition are the six major cognitive function domains identified by the DSM-5.

The cognitive approach's main characteristics are: a conviction that psychology should be treated as a pure science and that research methods should be based on science. The main focus is on thinking and related mental functions like language, perception, memory, and forgetting.

To know more about psychology visit:-

https://brainly.com/question/13513890?

#SPJ1

Answer:

The force acting on the train due to the air resistance is given by the formula:

F = (1/2) * p * A * v^2 * Cd

where p is the density of air, A is the cross-sectional area of the train, v is the speed of the train, and Cd is the drag coefficient.

We can assume that the drag coefficient is constant for a given shape of the train, and we can take it to be 0.5 for a train moving through air.

The pressure difference between the front and back of the train is given by:

P = (1/2) * p * v^2

The pressure difference between the sides of the train and the tunnel walls is given by:

2 * P = 2 * (1/2) * p * v^2 = p * v^2

The force acting on the train due to this pressure difference is given by:

F' = 2 * P * S = 2 * p * v^2 * S

The net force acting on the train is given by:

Fnet = F - F' = (1/2) * p * A * v^2 * Cd - 2 * p * v^2 * S

We can simplify this expression by factoring out p * v^2:

Fnet = p * v^2 * [(1/2) * A * Cd - 2 * S]

We are given that So = 4St, so we can substitute A = St and S = St/4:

Fnet = p * v^2 * [(1/2) * St * Cd - 1/2 * St * Cd] = 0

Therefore, the net force acting on the train is zero. This means that the force due to air resistance is exactly balanced by the force due to the pressure difference between the sides of the train and the tunnel walls.

We are given that Po - P = 2 * Pu, so we can substitute P = (1/2) * Po - Pu:

F' = 2 * P * S = 2 * [(1/2) * Po - Pu] * S = (Po - Pu) * 4 * St

We can equate this expression for F' to the expression for air resistance force:

F' = p * v^2 * [(1/2) * St * Cd - 2 * St/4] = p * v^2 * [(1/2) * St * Cd - St/2]

Equating these two expressions, we get:

(Po - Pu) * 4 * St = p * v^2 * [(1/2) * St * Cd - St/2]

Simplifying and solving for Pu, we get:

Pu = Po - (p * v^2 * Cd) / 8

We are given that Cd = 2N, so we can substitute this value:

Pu = Po - (p * v^2 * 2N) / 8

Pu = Po - (p * v^2 * N) / 4

Therefore, the pressure inside the train is Po - (p * v^2 * N) / 4.

The magnitude οf A + B is 1.95 m and its directiοn is 31.3° clοckwise frοm the pοsitive x-axis when the displacement vectοrs A and B is shοwn in the figure belοw bοth have magnitudes οf 1.95 m. The directiοn οf vectοr A is = 29.0°.

Tο determine the magnitude and directiοn οf A + B, we can measure the length οf the resulting vectοr and the angle it makes with the pοsitive x-axis, respectively.

Alternatively, we can use trigοnοmetry tο find the cοmpοnents οf vectοrs A and B and then add them up tο find the cοmpοnents οf A + B. Then, we can use inverse trigοnοmetric functiοns tο find the magnitude and directiοn οf the resulting vectοr.

Let's use the secοnd methοd tο sοlve this prοblem.

We are given that the magnitudes οf vectοrs A and B are 1.95 m each. The directiοn οf vectοr A is 29.0° cοunterclοckwise frοm the pοsitive x-axis. Let's call the angle between vectοr B and the pοsitive x-axis θ.

Using trigοnοmetry, we can find the x and y cοmpοnents οf vectοrs A and B as fοllοws:

Ax = 1.95 cοs 29.0° = 1.695 m

Ay = 1.95 sin 29.0° = 0.939 m

Bx = 1.95 cοs θ

By = 1.95 sin θ

Tο find θ, we need tο use the fact that the magnitude οf vectοr A + B is alsο 1.95 m. This means that:

[tex](Ax + Bx)^2 + (Ay + By)^2 = (1.95)^2[/tex]

Substituting the values of Ax and Ay, we get:

(1.695 + 1.95 cos θ)² + (0.939 + 1.95 sin θ)² = (1.95)²

Simplifying and solving for cos θ and sin θ, we get:

cos θ = -0.359

sin θ = -1.695

Since sin θ is negative, we know that vector B is pointing downwards.

Now, we can use inverse trigonometric functions to find the magnitude and direction of vector A + B:

[tex]|A + B| = sqrt((Ax + Bx)^2 + (Ay + By)^2) = 1.95 m[/tex]

θ = atan2(Ay + By, Ax + Bx) = atan2(-0.756, 1.336) = -31.3°

Therefore, the magnitude of A + B is 1.95 m and its direction is 31.3° clockwise from the positive x-axis.

To learn more about displacement vectors, visit: https://brainly.com/question/13416288

#SPJ1

Acetic anhydride has two hydrogen bond acceptor atoms and one hydrogen bond donor atom.

It can form two hydrogen bonds with another identical molecule and two hydrogen bonds with water.

  O

    //

H3C-C-O-C-CH3

    \\

     O

Acetic anhydride has two hydrogen bond acceptor atoms

Acetic anhydride can form two hydrogen bonds with another identical molecule and two hydrogen bonds with water

To know more about hydrogen bonds, visit :

https://brainly.com/question/30885458

#SPJ1

Answer:

Metals, nonmetals, and metalloids are three different categories for the elements. Metals may be hammered into sheets and are malleable, ductile, and excellent conductors of heat and electricity (they can be drawn into wire).

Explanation:

Brainliest pls

Answer:

A. Non-metals, metals, metalloids

Explanation:

metals are Group I, II and III and IV

Non metals are Group VII, VI and VIII

A typical 16-line poem that described centripetal force can be found below.

In circular motion, a force we call,

Centripetal, it keeps things in thrall.

Directed towards the center of the path,

Without it, objects would face a wrath.

Angular velocity is key,

The rate of change of the angle we see.

And the radius of the circle too,

Both play a role in what we must do.

The mass of the object cannot be ignored,

It factors in with gravity's cord.

As the force pulls towards the center,

Centripetal force is what we enter.

It is the sum of all the forces in play,

Equal to mass times velocity squared, we say.

And if the force is too weak or too strong,

Off the circular path, the object goes wrong.

Thus, centripetal force is what we need,

To keep objects moving at the speed,

In a circular path, they're meant to be,

A force that keeps them in harmony.

More on centripetal force can be found here: https://brainly.com/question/11324711

#SPJ1

Kirchhoff's current law is applied in nodal analysis. There will be 'n-1' simultaneous equations to solve when there are 'n' nodes in a given electrical circuit. 'n-1' must be solved in order to retrieve all of the node voltages.

Hence, we can solve for V1 and V2:

V1=Vi(R2+R3−k)k(1−nR3)−R2−R3.

V2=Vi(k−R2−R3(1+nR2))k(nR3−1)+R2+R3.

Nodal analysis is a fundamental approach used to investigate voltage and current distribution in a circuit and is one of the simulations included in SPICE simulators. This method successfully integrates Kirchhoff's and Ohm's laws into a single matrix equation.

The distinction between mesh and nodal analysis is that nodal analysis uses Kirchhoff's current law to calculate the voltages at each node in an equation. Mesh analysis, on the other hand, is an application of Kirchhoff's voltage law, which is used to calculate current.

Learn more about  nodal analysis,

https://brainly.com/question/26099417

#SPJ1

The equation = RC, where R is the resistance and C is the capacitance, yields the time constant of the circuit. We obtain the value = RC = (5.5 k)(4.5 F) = 24.75 ms = 0.02475 s by substituting the above variables.

In electronics, a circuit is a completely circular channel through which electricity flows. A current source, conductors, and a load make up a straightforward circuit.

The equation = RC, where R is the resistance and C is the capacitance, yields the time constant of the circuit. Inputting the values provided yields:

τ = RC = (5.5 kΩ)(4.5 µF) = 24.75 ms = 0.02475 s

The voltage drop Vc across the capacitor is equal to the voltage of the battery, i.e., Vc = VB = 180 V.

After a very long time, the voltage across the capacitor is equal to the voltage of the battery, i.e., V = VB = 180 V. Substituting the given values, we get:

Q = CV = (4.5 µF)(180 V) = 810 µC = 8.1 × 10⁻⁴ C

The current I in the circuit is equal to the current in the resistor, which is given by Ohm's law as I = V/R, where V is the voltage of the battery. Substituting the given values, we get:

I = V/R = (180 V)/(5.5 kΩ) = 32.73 mA = 3.273 × 10⁻² A

To find the time t when the current through the resistor is one-third of its maximum value, we can set I = (1/3)(VB/R) and solve for t:

(1/3)(VB/R) = (VB/R)e(-t/τ)

e(-t/τ) = 1/3

-t/τ = ln(1/3)

t = τln(3) ≈ 0.867τ

To know more about capacitance visit:-

https://brainly.com/question/28445252

#SPJ1

To accurately measure the distance traveled by the fire ants, we could use a measuring tape or a GPS device. For short distances, a measuring tape would suffice, while for longer distances, a GPS device would provide more accurate measurements.

How to investigate the distance traveled by fire ants to collect resources?

To investigate the distance traveled by fire ants to collect resources, we could follow the following plan:

To learn more about GPS device, visit: https://brainly.com/question/14996387

#SPJ1

The pair of cities moving apart because of plate motion is London and Boston.

London and Boston are moving apart due to the motion of tectonic plates. The Earth's lithosphere is divided into several large plates that are in constant motion due to the underlying mantle convection. The movement of these plates is driven by the forces generated by the mantle convection, which causes the plates to move away from each other, move towards each other, or move sideways past each other.

London and Boston are located on separate tectonic plates that are moving away from each other. London is located on the Eurasian Plate, while Boston is located on the North American Plate.

Find out more on plate motion at https://brainly.com/question/18612190

#SPJ1

The tire rotates at a rate of 223.7 rpm, while the frequency  layer of a tire is moving at a rate of 24.0 m/s plus 7.50 m/s, or 31.5 m/s. 24.0 m/s - 7.50 m/s = 16.5 m/s is the speed of a spot on the tire's bottom edge.

Frequency refers to the quantity of waves passing a defined location in a predetermined period of time. As a result, the rate is 2 per second if a wave passes through in 1/2 of a second. In this case, the rate is 100 times per hour if it takes 1/10 of an hour.

The quantity of observations that take place during a specific predetermined timeframe is the frequency of such a class interval. So, the frequency for such 5–9 age range is 20 if, for instance, 20 individuals between the ages of 5 and 9 exist in the study's data.

To know more about frequency visit:

https://brainly.com/question/2140860

#SPJ1

Answer

explanation

requirments

The explanation of each of their observations can be found below.

More on observations can be found here: https://brainly.com/question/28041973

#SPJ1

Planck's frequency (h) and indeed the light's velocity (c) are used to connect a photon's energy (E) to its wavelength (), frequency (v), and wavelength. E = hν = hc/λ.

We frequently use the word "energy" in our everyday speech. Energy has an unique physical meaning even if the term is frequently used figuratively. Energy is defined in physics as something's capacity to perform work. Many types of energy are possible. All energy is kinetic in some way.

Energy is present everywhere and comes in a variety of shapes and sizes. Objects at rest have potential energy that, if released, will cause them to move. All moving things contain kinetic energy.

To know more about Energy visit:

https://brainly.com/question/1932868

#SPJ9

The required distance to come to a stop now is 30 meters.

To solve this problem, we can use the equation:

v^2 = u^2 + 2as

where:

v is the final velocity (zero in this case)

u is the initial velocity (10 m/s in the first instance and 20 m/s in the second instance)

a is the acceleration (which is constant in this case)

s is the distance traveled (6 m in the first instance and we need to find it for the second instance)

Solving for s, we get:

s = (v^2 - u^2) / (2a)

For the first instance:

u = 10 m/s

v = 0 m/s

s = 6 m

a = (v^2 - u^2) / (2s) = (0 - 10^2) / (2 x 6) = -16.67 m/s^2 (negative sign indicates deceleration)

Now, using the same constant force, we can find the required distance s for the second instance:

u = 20 m/s

a = -16.67 m/s^2

v = 0 m/s (since the car stops)

s = (v^2 - u^2) / (2a) = (0 - 20^2) / (2 x -16.67) = 30 m

Therefore, the required distance to come to a stop now is 30 meters.

learn more about force here

https://brainly.com/question/11556949

#SPJ1

Answer:

(a) The thrust of the rocket can be found using the formula:

Thrust = (mass flow rate) x (exhaust velocity)

The mass flow rate is the rate at which mass is expelled from the rocket, which is equal to the burn rate times the mass fraction of fuel:

mass flow rate = burn rate x (mass of rocket) x (mass fraction of fuel)

mass flow rate = 200 kg/s x 20,000 kg x 0.8

mass flow rate = 32,000 kg/s

The exhaust velocity is given as 1.80 km/s. Therefore, the thrust of the rocket is:

Thrust = 32,000 kg/s x 1.80 km/s

Thrust = 57,600 kN

(b) The time it takes to exhaust the fuel can be found using the formula:

time = (mass of fuel) / (burn rate)

The mass of fuel is 80% of the initial mass of the rocket:

mass of fuel = 0.8 x 20,000 kg

mass of fuel = 16,000 kg

Therefore, the time it takes to exhaust the fuel is:

time = 16,000 kg / 200 kg/s

time = 80 seconds

(c) The rocket's speed at the end of its engine burn can be found using the rocket equation:

Δv = (exhaust velocity) x ln[(initial mass) / (final mass)]

The final mass is the mass of the rocket after it has burned all of its fuel, which is:

final mass = (mass of rocket) - (mass of fuel)

final mass = 20,000 kg - 16,000 kg

final mass = 4,000 kg

The initial mass is 20,000 kg. Therefore, the change in velocity is:

Δv = 1.80 km/s x ln[(20,000 kg) / (4,000 kg)]

Δv = 1.80 km/s x ln(5)

Δv = 3.89 km/s

Since the rocket was initially at rest, its final speed is equal to the change in velocity:

final speed = 3.89 km/s

Therefore, the rocket's speed at the end of its engine burn is 3.89 km/s.

The force per unit length of Y would be 1.25 * [tex]10^{-3[/tex] N/m.

The force per unit length between two parallel wires carrying currents can be calculated using the equation:

F = μ0 * I1 * I2 * L / (2 * π * d)

where:

Substituting the given values, we get:

F_X = μ0 * 3A * 5A * L / (2 * π * d) = 5 * 10^-5 N

Solving for F_Y, we get:

F_Y = 2 * F_X * π * d / (μ0 * 5A * L)

= 2 * (5 * 10^-5 N) * π * d / (4π * 10^-7 T·m/A * 5A * L)

= 1.25 * [tex]10^{-3[/tex] N/m

Therefore, the force per unit length experienced by wire Y is 1.25 * 10^-3 N/m.

More on force per unit length can be found here: https://brainly.com/question/20358392

#SPJ1

Answer:

last choice

Explanation:

With a single fixed pulley, you pull down (working with the force of gravity) to lift the load up.

Therefore, the volume of the ore is 0.0069 cubic meters.

Volume is a measure of the amount of space that an object or substance occupies. It is a fundamental physical quantity that describes the three-dimensional size of an object or space. The SI unit of volume is the cubic meter (m³), but other units such as liters, gallons, and cubic centimeters (cm³) are also commonly used. Volume can be calculated for regular shapes, such as cubes or cylinders, using mathematical formulas, but for irregular shapes, more complex methods, such as displacement, may be needed.

Here,

To calculate the volume of the ore, we need to convert all the measurements to the same unit. We can choose to convert everything to meters since that's the base unit for volume (cubic meters).

8.8 dm = 0.88 m (1 dm = 0.1 m)

92.4 mm = 0.0924 m (1 mm = 0.001 m)

0.007 dam = 0.07 m (1 dam = 10 m)

Now we can use the formula for volume of a rectangular block:

Volume = length x width x height

Volume = 0.88 m x 0.0924 m x 0.07 m

Volume = 0.0069 cubic meters

To know more about volume,

https://brainly.com/question/25252629

#SPJ9

Answer: Applying a weight limit to a road is often done in an attempt to protect a roadway's appearance in particular. It also aims to protect the character and environment of rural areas, villages, and residential estates. Restricting overweight freights may just prevent damages like pot holes and cracks in the road.

Explanation:

I HOPE THIS HELPED GOOD LUCK AND I AM OPEN FOR FREE ANSWERS!

While submerged in water (n = 1.33) for two convex lenses, the focal lengths of Lens 1 is 19.67 cm and Lens 2 is 18.9 cm.

Lens is a transparent device that is used to focus or redirect light, allowing it to be magnified, focused, or projected onto a surface. It is made of a curved, transparent material like glass, plastic, or crystal. Lenses are commonly used in eyeglasses, cameras, microscopes, and other optical devices. They can be used to magnify, reduce, or otherwise change the direction of light in order to produce a desired effect. They are also used in other applications such as laser cutting and welding, as well as medical imaging and laser treatments.

To learn more about Lens

https://brainly.com/question/28039799

#SPJ1

P = [M1 L1 T-2] × [L2]-1 = M1 L-1 T -2. Therefore, the pressure is dimensionally represented as M1 L-1 T -2.

The colliding objects stick together after the collision, or some kinetic energy is lost to the environment.

The question is incomplete but I will discuss the concept of inelastic collision generally.

An inelastic collision is a type of collision in which kinetic energy is not conserved. In other words, in an inelastic collision, some of the kinetic energy of the colliding objects is transformed into other forms of energy, such as heat, sound, or deformation of the objects.

In an inelastic collision, the colliding objects stick together after the collision, or some kinetic energy is lost to the environment. This means that the final kinetic energy of the objects is less than the initial kinetic energy, and that the objects move with a lower velocity after the collision than they did before.

Learn more about inelastic Collison:https://brainly.com/question/29013438

#SPJ1

Stress refers to a state of mental or emotional strain resulting from adverse or demanding circumstances. It can also refer to the physical forces that act on an object, causing deformation or strain.

In terms of mental or emotional stress, it can result from a variety of factors such as work-related pressure, financial problems, relationship issues, health concerns, and other life events that require us to adapt and cope with changing circumstances.

Physical stress refers to the force or pressure applied to an object, which can cause it to deform, strain, or break. This type of stress can arise from a variety of sources such as gravity, external forces, or internal forces caused by changes in temperature, pressure, or other physical conditions.

Examples of physical stress include tension in a bridge caused by the weight of traffic passing over it, strain in a metal bar due to changes in temperature, or compression of a spring due to a force applied to it. In all cases, the object is subjected to forces that cause it to deform or change shape, leading to stresses that can impact its strength, durability, and performance.

learn more about emotional stress: https://brainly.com/question/11819849

#SPJ1

37. Segment B of the graph corresponds to the only solid state. ,38. Segment E of the graph corresponds to the melting point. and all answer given below:

Segment is a customer data platform (CDP) that enables businesses to collect, store, and analyze customer data from multiple sources. It allows companies to unify their customer data into one place, which can then be used to create more personalized customer experiences. With Segment, businesses can create custom segments of their customers and create targeted campaigns to meet their specific needs.

39. The melting point (temperature) is 300°C.

40. Segment F of the graph corresponds to the only liquid state.

41. Segment A of the graph corresponds to the only gas state.

42. Segment D of the graph corresponds to the boiling point.

43. No, the temperature decreases during freezing.

44. Segment C of the graph corresponds to the freezing point.

45. The boiling point (temperature) is 450°C.

To learn more about Segment
https://brainly.com/question/30436465
#SPJ1