A car P was decelerating at 2.0 m/s^2 when it passes a stationary car Q, and speed was 20 m/s. At the same car Q from rest and accelerated at 2.5 m/s² along the same straight road.
(i) Find the time when car Q overtook car P.
(ii) How far was car Q from car P when car P came to a stop?​

Answer:

235 km/s2

Explanation:

cus mall pods carrying four passengers would accelerate at 2.5 m/s2 until reaching a speed of 330 m/s.

This question is about the acceleration and braking calculations for pods proposed by The Boring Company to transport people between Los Angeles and San Francisco.

Physics - High School

The subject of this question is Physics, specifically dealing with the concept of motion and acceleration. The question presents a scenario where The Boring Company proposes transporting people between Los Angeles and San Francisco in underground tubes using small pods. The question asks for the acceleration and braking calculations for the pods.

Acceleration:

Braking:

By finding the time taken for acceleration and braking, you can determine the total travel time for one pod.

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The pulling tension  on the sled is 125.44 N.

The pulling tension  on the sled is equal to force of friction acting against the sled since it is moving at a constant velocity.

Mathematically, the formula for the pulling tension is given as;

T = Ff = μmg

where;

The pulling tension  on the sled is calculated as follows;

T = ( 0.2 ) x ( 64 kg ) x ( 9.8 m/s² )

T = 125.44 N

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The length of the path traveled between two points is called distance.

Distance physically can refer to several different things, namely:

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a) Cart is speeding up ; b) cart is slowing down and c) cart is not moving.

Force of friction is a contact force whereas friction is the force that resists motion when surface of one object comes in contact with surface of another. Example is the force of friction between two stones rubbed with each other.

Static friction magnitude is directly proportional to normal force magnitude and the roughness between sliding surfaces. The ratio of magnitude of frictional force divided by normal force magnitude is called as coefficient of friction. Friction takes place at the point of contact between two bodies.

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An adiabatic process is a thermodynamic process in which there is no heat transfer from the system to the environment; instead, the heat is maintained constant.

Being or having to do with a system of atoms, molecules, colloidal particles, or bigger things that is studied as an isolated group in terms of thermodynamic processes. thermodynamically.

Washing machines, refrigerators, and air conditioners are a few examples of thermodynamic systems. The refrigerant in an air conditioner circulates inside a closed system, changing its pressure at various places to facilitate the transmission of heat.

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The engineer should measure the radius of the ball bearings before the pivot has been used.

Given is that an engineer builds a model of a machine pivot. Instead of the two parts of the pivot directly touching one another, they have ball bearings between them.

As an indication of the amount of friction in the pivot, the engineer should measure the radius of the ball bearings before the pivot has been used.

Therefore, the engineer should measure the radius of the ball bearings before the pivot has been used.

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The initial velocity u be the product of time t and acceleration due to gravity g thus u = gt. Then height that the ball can move with this velocity is 1/2 gt².

Velocity of a moving object is the measure of its distance travelled per unit time. Velocity is a vector quantity having both magnitude and direction. Acceleration is the rate of change in velocity.

Here, the initial velocity is given u. It is the product of acceleration g and time t. thus, u = gt.

The height travelled within the time t and acceleration g, is written as:

h = 1/2 gt²

Now, when the ball reaches its maximum height, its potential energy becomes equal to the kinetic energy.

that is, 1/2 mv² = mgh

therefore, h = v²/2g.

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The normal stress is 1292.5 Pa and the shear stress is 330 Pa on the plane at an angle of 50° relative to the principal stress axes.

Shear stress is described as the component of stress coplanar with a material cross section which arises from the shear force, the component of force vector parallel to the material cross section.

We will calculate the major and minor principal stresses:

σ1 = (ob + ja) / 2 + (ja - ob) / 2 * cos(2b)

σ2 = (ob + ja) / 2 - (ja - ob) / 2 * cos(2b)

The normal stress on the plane at angle b can be calculated as:

σ = (σ1 + σ2) / 2 + (σ1 - σ2) / 2 * cos(2b)

The shear stress on the plane at angle b can be calculated as:

τ = (σ1 - σ2) / 2 * sin(2b)

Applying the  formulas, we have:

σ1 = (500 + 1500) / 2 + (1500 - 500) / 2 * cos(2 * 50) = 1000 + 500 * 0.87 = 1000 + 435 = 1435 Pa

σ2 = (500 + 1500) / 2 - (1500 - 500) / 2 * cos(2 * 50) = 1000 - 500 * 0.87 = 1000 - 435 = 565 Pa

σ = (1435 + 565) / 2 + (1435 - 565) / 2 * cos(2 * 50) = 1000 + 435 * cos(100) = 1000 + 292.5 = 1292.5 Pa

τ = (1435 - 565) / 2 * sin(2 * 50) = 435 * sin(100) = 435 * 0.76 = 330 Pa

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Answer:

Explanation:

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The energy that is needed to turn the water into a gas is called the latent heat of vaporization.

Latent heat of vaporization is the heat capacity or energy that is needed to turn the water in liquid state into a gas without any rise or change in temperature of the water.

Mathematically, the formula for the energy that is needed to turn the water into a gas is given as;

Q = mLv

where;

Thus, the three words needed to complete the sentence are  heat of vaporization.

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The correct answer is a sealed, insulated cooler.

A closed system is a collection of interconnected parts that form a cohesive whole and prevent matter from entering or leaving its boundaries. However, due to thermodynamic laws, no system is truly closed off from all quantities.

Energy and heat can always enter and exit a system. Therefore, a closed system is often described as one that only allows energy or heat to enter and leave, but not matte.

In conclusion, a closed system is a system that is completely isolated from its environment.

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The total distance travelled by the whale is 3 km.

The complete length of the path between any two points is called distance.

Displacement is the direct length between any two points when measured along the minimum path between them. It is a straight line joining initial and final points.

Given is that a whale swims due EAST for a distance of 6 km, turns around and goes due WEST for 1 km, and finally turns around again and heads 3 km due EAST.

The total distance travelled by the whale will be -

{d} = 6 km + 1 km + 3 km

{d} = 3 km

Therefore, the total distance travelled by the whale is 3 km.

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The electric current flows through the circuit is  15 amp.

The resistance of the circuit is 8 ohm.

The rate at which electrical energy is carried over an electric circuit is known as electric power. The watt, or one joule per second, is the SI unit of power. Watts are subject to the same standard prefixes as other SI units: kilowatts, megawatts, and gigawatts are used.

The electric current flows through the circuit is = (1800 ÷ 120) amp

= 15 amp.

The resistance of the circuit is = (120 ÷ 15) ohm

= 8 ohm.

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Hold the measurement target between the screw gauge's anvil and spindle while applying light pressure. the main size reading of the a circular scale just before zero.

Vernier calipers can be used for alike external and internal measurements, while screw gauges can only be used for external measurements. A vernier caliper has a minimum count of 0.001 cm while a screw gauge has a minimum count of 0.01 cm.

This metre ruler, commonly known as a metre stick, is used to measure short distances and lengths up with one metre. It is a measuring tool used to determine distances and rule straight lines in engineering drawings, geometry, engineering, printing, and construction.

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Answer:

Let vector C(x,y) be A-B.

Explanation:

Now the direction is given by: tan-1(y/x)

Use the correct angle on the basis in which quadrant the vector C lies.

Magnitude = sqrt(x^2 + y^2)

Answer:

Heating effects impact the flow of the electricity.

Explanation:

According to the ideal gas law, 0.588 moles of NH3 gas in a 15.0 L container must be heated to a temperature of 1088.85 K or 815.85°C in order for it to impose a pressure of 3.50 atm.

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The definition of the terms will be:

(i) Fluid: A fluid is a substance that continuously deforms (flows) under an applied shear stress. Examples of fluids include liquids and gases.

(ii) Viscosity: Viscosity is a measure of a fluid's resistance to flow. It is defined as the ratio of shear stress to the rate of strain in the fluid.

(iii) Drag Force: Drag force is a force acting on a moving object in a fluid that opposes its motion. It is proportional to the velocity squared of the object and the fluid density.

(i) Fluid Mechanics: Fluid mechanics is the branch of physics that deals with the study of the behavior of fluids at rest and in motion. It covers various topics such as fluid statics, kinematics, and dynamics.

(ii) Fluid Statistics: Fluid statistics deals with the behavior of fluids in terms of the statistical distribution of their properties, such as temperature, pressure, and velocity.

(iii) Fluid Kinematics: Fluid kinematics is the study of fluid motion without considering the forces that cause the motion.

(iv) Fluid Dynamics: Fluid dynamics is the study of fluid motion and the forces that cause the motion. It covers topics such as the conservation of mass, momentum, and energy, and the study of fluid flows, such as laminar and turbulent flows.

(i) Circular Motion: Circular motion is motion in which an object moves along a circular path with a constant speed.

(ii) Rotational Motion: Rotational motion is motion in which an object rotates about a fixed axis.

(iii) v = wr: This equation states that the velocity of a point on a rotating object is equal to the product of its radial distance (r) from the axis of rotation and the angular velocity (w) of the object.

(iv) a = ar: This equation states that the radial acceleration of a point on a rotating object is equal to the product of its radial distance (r) from the axis of rotation and the angular acceleration (a) of the object.

(v) Torque: Torque is the rotational equivalent of force. It is defined as the cross product of the radial distance (r) and the force (F) applied to an object. The mathematical expression of torque is given by τ = r x F, where τ is the torque, r is the radial distance, and F is the force.

Projectile motion is the motion of an object that is projected into the air and then is subject to the force of gravity. To calculate the range (R), time of flight (T), and maximum height (H) of a projectile, the following equations can be used:

R = v0x * T, where v0x is the initial velocity in the x direction and T is the time of flight.

T = 2v0y / g, where v0y is the initial velocity in the y direction and g is the acceleration due to gravity.

H = v0y^2 / (2g), where v0y is the initial velocity in the y direction and g is the acceleration due to gravity.

Bernoulli's equation is a principle that relates pressure and velocity in a fluid system. It states that the pressure of a fluid decreases as its velocity increases. The expression of Bernoulli's equation is given by P + 1/2 ρv^2 + ρgy = constant, where P is the pressure, ρ is the fluid density, v is the fluid velocity, g is the acceleration due to gravity, and y is the height

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Answer: 70 meters per second = 25550 kilometers per year

70 x 365 (1y) = 25550 (km/y)

Answer: Environmental factors are the abiotic factors that interact with and influence the biotic factors. The amount of carbon dioxide, and water clarity affects the sunlight reaching the aquatic organisms.

According to Pythagoras's Theorem, the square of the hypotenuse side in a right-angled triangle is equal to the sum of the squares of the other two sides.

A, B, and C are the three positive integers, and the Pythagorean triples are written as a2+b2 = c2. These triples are shown as (a,b,c). Here, the right-angled triangle's base, hypotenuse, and perpendicular are denoted by letters a, b, and c, respectively. The most popular and diminutive triplets include (3,4,5).

O is at a right angle in AOB.

∴ By using the Pythagoras Theorem, (AB) 2 = (OB) 2 + (OA) 2.

∴ He has traveled 5 kilometers.

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As the collision is elastic,  u₁ + u₂ = v₁ + v₂ must be satisfied.

According to the law of momentum conservation, momentum is never created nor destroyed inside a problem domain.

Before collision,

velocity of body A = u₁ velocity of body B = u₂

After collision,

velocity of body A = v₁ velocity of body B = v₂

Hence, according to  law of momentum conservation

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

As the collision is elastic, total kinetic energy is also conserved.

1/2m₁u₁² + 1/2m₂u₂² = 1/2m₁v₁² + 1/2m₂v₂²

This two equation satisfy that:

u₁ + u₂ = v₁ + v₂

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The equal and the opposite force is the person's force of gravity pulls up on the elevator. Option A

We know that the elevator is the kind of device that can be used when we are going up or down a high rise building. We have to note that the elevator that we talking about will also work based on the law of Newton.

We have to note that for every force there is an equal and an opposite force and the same is true when you are using the elevator to move up or down as we can see here.

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Answer:

Explanation:

rubber ball, glass jar, motor oil, and tree

The period (T), which is expressed in seconds, is the amount of time required for one full vibration. The frequency of a vibration, for instance, is 10 vibration per second, or 10 hertz, if the duration of a vibrating is 0.1 sec.

T = 1/f, where f is the frequency and T is the period, is the formula for time. = c/f, where c represents wave speed (m/s) as f represents frequency (Hz). Cycles per second (Hz) is the abbreviation for the hertz unit. The equation below describes how electromagnetic waves and sound waves behave.

Solid objects transmit sound the fastest. This is because sound waves can move through a solid medium much more swiftly than they can through a liquid or gas since its molecules are much closer together. In actuality, steel conducts sound waves nearly 17 times more quickly than air.

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The change in the internal energy of the gas is -28 J

Internal energy (U) is the total energy of a thermodynamic system, including the kinetic and potential energies of its particles, as well as its internal molecular energy. It is a thermodynamic state function and depends on the temperature, pressure, and other variables that describe the state of a system.

From the statement of the first law of thermodynamics, we know that we have;

ΔU = q + w

Since the heat was given up and work was done q = -ve

w = -ve Hence we have;

ΔU = -15J - 13J

= -28 J

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The amount of effort put forward if the gas is compressed to only 1/4 of its original volume W = P x AV equals (1,6 x 10 5 Pa) (4 m3). 5. W = 6,4 x 10 J.

Generally speaking, minimal contact with gasoline is safe. A person's health can be significantly harmed by prolonged exposure to gasoline and its vapors since they are poisonous. Humans have created gasoline, which is largely used to power cars and other engine-powered machinery.

Chevron has the greatest overall customer satisfaction ratings among the biggest national chains in America. Over 7,800 stores are within its reach, and while some petrol stations include quick food marts, one in North Hollywood goes above and beyond.

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Answer:

Explanation:

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Answer:

They are used for energy such as electricity