Velocity is a change in displacement. T Or F


Speed is a change in distance. T Or F


If an object stops where it started, it has zero

displacement. T Or F


If an object is traveling at constant speed, its speed

never changes. T Or F


If an object is traveling at constant speed, it may

have different instantaneous speeds. T Or F


A flat line on a speed-time graph means the object is

not moving. T Or F

A flat line on a position-time graph means the object is traveling at constant zero speed. T Or F

An object can have constant speed but changing. T Or F

velocity.

1. What is different about the following two formulas:

speed=distance/velocity or velocity =displacement/time

Answer:

1000m=1km

simple :) . . .

Answer:

Explanation:

Using the formula for heart capacity;

Q = mcΔt

m is the mass = 150g = 0.15kg

initial temperature = 22°C

Quantity of heat = 3240J = 3.24kJ

specific heat capacity of ethanol = 2.57 [kJ/kg K]

Substitute and get the final temperature

3.240 = 0.15(2.57)(T - 22)

3.240 = 0.3855(T-22)

3.240/0.3855 = T - 22

8.405 = T - 22

T = 22+8.405

T = 30.405°C

Hence the final temperature of the ethanol if 3240 J was needed to raise the temperature of the ethanol is 30.405°C

The most recent view of the atom is the quantum mechanical model of the atom.

We know that the atom is smallest part of the substances that can take part ion a chemical reaction.

An atomic model is a theoretical construct that explains the properties and behavior of atoms, the basic building blocks of matter. The most widely accepted atomic model is the quantum mechanical model, which describes atoms as consisting of a nucleus of protons and neutrons, surrounded by a cloud of electrons.

The electrons occupy energy levels or orbitals, and their behavior is described by the principles of quantum mechanics. The earliest atomic model was proposed by John Dalton in the early 19th century, which was a classical mechanical model.

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The answers is 30 miles per hour, the driver is speeding the car up,     section-H, 12 minutes, section-D, and 65 miles per hour.

The inclination angle of an object is related to the frictional force in that as the angle increases, the frictional force required to prevent sliding also increases.

The inclination angle of an object refers to the angle at which it is tilted or inclined relative to a horizontal surface. The relationship between inclination angle and frictional force can be understood using a free body diagram.

Consider an object on an inclined plane. The force of gravity acting vertically downward can be broken down into two components: one parallel to the incline and one perpendicular to it. The component parallel to the incline is responsible for the object's tendency to slide down the plane. This force is known as the gravitational force component along the incline.

Frictional force acts opposite to the gravitational force component along the incline. It acts parallel to the incline and prevents the object from sliding down. The magnitude of the frictional force depends on the coefficient of friction and the normal force acting perpendicular to the incline.

As the inclination angle increases, the gravitational force component along the incline increases. Therefore, the frictional force needed to balance it also increases. This means that the frictional force is directly related to the inclination angle.

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The least amount of time it will take to reach the rope without breaking is 0.70 seconds .

Force required to lift it is equal to its weight = 12.0 kg x 9.81 m/s² = 117.72 N.

The rope will snap if the tension exceeds 132 N. Therefore, the tension in the rope must be less than or equal to 132 N.

Tension in the rope :

T = 117.72 N + (12.0 kg x -9.81 m/s²) = 0 N

Time taken to reach banana:

t = d/s = 6.80 m / 9.81 m/s² = 0.70 s

Therefore, the least amount of time the monkey could take to reach the banana without breaking the rope is 0.70 seconds.

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The de Broglie wavelength for a proton moving with a speed of 1.0 x 10⁶ m/s is approximately 6.63 x 10⁻⁹ meters.

The de Broglie wavelength (λ) of a particle is given by the equation:

λ = h / p

Where:

λ is the de Broglie wavelength

h is the Planck's constant (approximately 6.63 x 10⁻³⁴ joule-seconds)

p is the momentum of the particle

The momentum of a particle is given by:

p = mv

Where:

m is the mass of the particle

v is the velocity of the particle

In this case, we are dealing with a proton. The mass of a proton (m) is approximately 1.67 x 10⁻²⁷ kilograms.

Given the speed of the proton (v) as 1.0 x 10⁶ m/s, we can calculate the momentum (p):

p = mv = (1.67 x 10⁻²⁷ kg) x (1.0 x 10⁶ m/s) = 1.67 x 10⁻²¹ kg·m/s

Now, we can calculate the de Broglie wavelength (λ):

λ = h / p = (6.63 x 10⁻³⁴ J·s) / (1.67 x 10⁻²¹ kg·m/s) ≈ 6.63 x 10⁻⁹ meters.

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It is the true statement, that if we double the force acting on a body, the acceleration will double.

In terms of both speed and direction, acceleration is the rate at which velocity varies over time. Acceleration refers to the change in speed or direction of an item or point travelling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant. Both impacts help to accelerate all other types of motion.

In order to be a vector quantity, acceleration must have both a magnitude and a direction. As a vector quantity, velocity is also. A time interval's velocity vector change divided by that interval's duration is the definition of acceleration.

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Low-carbon steel would not be an ideal choice for an inexpensive household light switch due to several material selection parameters.

When considering materials for an application like a household light switch, various factors need to be taken into account. Here are five materials selection parameters that highlight why low-carbon steel may not be suitable:

1. Conductivity: Low-carbon steel has relatively low electrical conductivity compared to other metals like copper or aluminum. A light switch requires efficient electrical conduction, and low-carbon steel may result in higher resistance and energy loss.

2. Corrosion resistance: Low-carbon steel is prone to corrosion, especially in humid environments or if exposed to moisture. Household switches are frequently touched and exposed to air and humidity, making corrosion resistance a crucial consideration.

3. Durability: Light switches are subject to repetitive usage, requiring a material with good mechanical strength and durability. While low-carbon steel is robust, it may not offer the same level of endurance as other materials like stainless steel or high-impact plastics.

4. Aesthetic appeal: Low-carbon steel may lack the desired aesthetic appearance for a light switch. Commonly, light switches have a sleek and visually appealing design and alternative materials offer more options for customization and surface finishes.

5. Cost-effectiveness: While low-carbon steel is generally affordable, other materials like plastics or certain alloys may provide better cost-effectiveness for a household light switch, especially when considering factors like production, installation, and maintenance costs.

In conclusion, considering factors such as conductivity, corrosion resistance, durability, aesthetic appeal, and cost-effectiveness, low-carbon steel may not be the optimal choice for an inexpensive household light switch.

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The statement that transmission of culture occurs between related and unrelated individuals, as well as through various forms of media, is true.

This means that cultural transmission is not restricted to the parent-offspring relationship, and can occur through social interactions with peers, teachers, and other individuals, as well as through media such as books, television, and the internet. While genetic transmission is limited to the passing on of genes from parent to offspring, cultural transmission is a more complex process that can involve multiple sources and methods of transmission.

Genetic transmission is the process through which genes are passed from parent organisms to their progeny. It takes place during reproduction when genes, which are sections of DNA, are passed from one generation to the next, assuring the inheritance of traits and characteristics.

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Answer: out of the screen

Answer:

Explanation:

The velocity of the wavelength when given it's wavelength and frequency can be found by using the formula

\( c = f \times \lambda \\ \)

where

f is the frequency

\( \lambda\) is the wavelength in meters

From the question we have

c = 17 × 10.6 = 180.2

We have the final answer as

Hope this helps you

Answer: It’s true

Explanation:

The mass of the object will be equal to 5 kg.

In order to obtain the mass of the object, we will have to use the formula for the spring force at equilibrium which is; kx = mg.

Where:

k = spring constant or which is the applied force multiplied by the displacement of the spring. Assuming a minimum force of 1 N. =

K = 1 N/0.04 m = 25

X = displacement of the spring/ increase 0.02 m

and g = the gravitational force 0.1

Merging all of these is the given equation will depict mass as

m = 25 (0.02 m)/ 0.1 m/s

= 5 kg

Therefore, the mass is 5 kg.

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Alternate Approach The inductor exhibits open circuit behavior at time t=0+. At t=0+, inductive reactance is infinite, causing the inductor to initially operate as an open circuit. The inductor similarly acts like a short circuit at steady state.

The inductor behaves as an open circuit with current reflected back at time t = 0 +. Important Information: A capacitor with a zero starting condition behaves as a short circuit at time t = 0 +, reflecting back voltage.

At time t = 0, an inductor is coupled to a charged capacitor. Considering the capacitor and the inductor as one, Write out the equation for the effective potential difference across the combination at any instant in time t, and then solve it to find the instantaneous current through the combination.

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The change in the internal energy of the ideal gas is determined as -28 J.

The work done on the ideal gas is calculated as follows;

w = -PΔV

w = -1.5 x 10⁵(0.0006 - 0.0002)

w = -60 J

ΔU = w + q

ΔU = -60J + 32 J

ΔU = -28 J

Thus, the change in the internal energy of the ideal gas is determined as -28 J.

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To solve this, we must know each and every concept behind velocity and its calculation. Therefore,  the car's velocity after it has traveled 35.0 m is 157.5m/s.

Velocity is the vector measurement of an object's rate of motion and direction of motion. As a result, in order to calculate velocity using this definition, we must be familiar with both magnitude and direction.

For example, if an item travels west with 5 meters a second (m/s), its velocity to the west will be 5 m/s. The most frequent and simplest approach to determine velocity is using the formula shown below.

Mathematically,

Vf= Vi +2as

Vf= final velocity=?

Vi= initial velocity=0

s= displacement =35.0 m

substituting all the given values in the above equation, we get

Vf=0+2× 4.50 ×35

Vf=157.5m/s

Therefore,  the car's velocity after it has traveled 35.0 m is 157.5m/s.

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Answer:

x=12

Explanation:

The way ice water mix with the salty water is that  when a person adds salty water to ice, the salt will be the first thing to dissolves in the layer of liquid water that is seen on the surface.

By reducing the  freezing point below the ices temperature, when the Ice is said to be in contact with salty water, it tends to melts, forming more liquid water, that will then dissolves more salt, causing a lot of ice to melt, and the process still goes on.

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Lumped Capacitance Method:Lumped Capacitance Method is defined as a heat transfer method that is used to find the temperature of a solid object at the center when it is exposed to different temperatures at the surface. It is a method in which the whole system is treated as a single entity and assumes the temperature to be uniform throughout the system.

It does not consider the internal temperature gradients that occur within the solid.The heat transfer rate from a solid to its surroundings is directly proportional to the difference between the temperature of the solid and the surroundings, which is Newton's law of cooling. Lumped capacitance method is a type of solution to the heat transfer equation in which the heat capacity of the object being heated is assumed to be concentrated in a single location or "lumped" into one point.Using the Lumped Capacitance Method, the temperature of a cylindrical stainless steel rod can be found when it passes through a heat treatment furnace. The initial temperature of the rod is 100 °C and the furnace gas is at 800 °C. The rod has a diameter of 10 cm and is 25 cm long.

Initial temperature of the rod (Ti) = 100 °C

Furnace gas temperature (To) = 800 °C

Diameter of the rod (D) = 10 cm

Length of the rod (L) = 25 cm

The Biot number is given by,Bi = hL / k

where

h = heat transfer coefficient

L = Length of the cylinder

k = thermal conductivity of steel rod

Bi = 6.41 (approx)

The Fourier number is given by,

Fo = αt / L²

where

α = thermal diffusivity

t = time

Fo = 0.125 (approx)

The Nusselt number is given by,Nu = hD / k

where,

h = heat transfer coefficient

k = thermal conductivity of steel rod

Nu = 27.98 (approx)

Using the above formula, the temperature of the rod can be calculated as,

θ = To + (Ti - To) * exp(-Bi * Fo)θ = 794.21 °C

Therefore, the temperature of the rod when it passes through the heat treatment furnace is 794.21 °C.

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Answer:

92 OHMS

Explanation:

The resistance will be "92 ohm".

According to the question,

Current,

Voltage,

As we know the formula,

→ \(I = \frac{V}{R}\)

or,

→ \(R = \frac{V}{I}\)

By substituting the values, we get

→     \(= \frac{230}{2.5}\)

→     \(= 92 \ ohm\)

Thus the answer above is right.

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When two waves interfere, the resulting displacement is determined by the principle of superposition, which states that the displacements caused by individual waves add up algebraically at each point of overlap. In the case of constructive interference, the waves are in phase, meaning their peaks and troughs align, resulting in an increase in the amplitude.

Here, we have a wave with an amplitude of 10 cm and another wave with an amplitude of 15 cm. To determine the maximum displacement that may result when they overlap, we need to consider the combined effect of their amplitudes. Since constructive interference occurs when the waves are in phase, the maximum displacement will be the sum of the individual amplitudes. Adding 10 cm and 15 cm yields a maximum displacement of 25 cm. Therefore, the maximum displacement that may result when the waves overlap is 25 cm. This signifies the peak combined effect of the two waves, resulting in a larger amplitude at specific points of overlap. i.e.,

the maximum displacement is given by:

Maximum displacement = Amplitude of Wave 1 + Amplitude of Wave 2

Maximum displacement = 10 cm + 15 cm

Maximum displacement = 25 cm

Therefore, the maximum displacement that may result when the two waves overlap is 25 cm.

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Answer:

1. An object will remain still unless tampered by an external force.

2. Force = change in Momentum * Acceleration

3. For every action, there is an equal and opposite re-action.

Explanation:

Answer:

The 500 would be able to keep a light bulb on longer.

Explanation:

The 500 would be able to hold more charge than the 100 which means it can keep the light bulb lit for longer.

Answer:

The velocity of the ball after 5 seconds will be 49 m/s

Explanation:

v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time

Initial velocity of the ball = 0 (As the ball is dropped from rest )

Acceleration due to gravity = 9.8 m/s

Time taken = 5 sec

As the acceleration due to gravity is constant in both the cases we can use the equations of motion in order to solve this question

Part I :- As we already know the values of u,g,ant t we can use the first equation of motion in order to find v

Part II :- As we know the values of u, t , g we can use the second equation of motion in order to find s.

Velocity of the ball after 5 seconds

Distance covered by the ball in 5 sec

133xe is the chemical symbol for Xenon-133, an isotope of Xenon. It has 54 protons, 79 neutrons, and 54 electrons.


Xenon-133 has 54 protons, which determines its atomic number and chemical properties. It also has 79 neutrons, which contributes to its atomic mass. The electrons in Xenon-133 are arranged in energy levels around the nucleus, and there are 54 of them. The number of electrons is equal to the number of protons in a neutral atom. Knowing the number of protons, neutrons, and electrons in an atom is important for understanding its properties and behavior, such as its reactivity with other elements.


To summarize, Xenon-133 has 54 protons, 79 neutrons, and 54 electrons. These three subatomic particles play important roles in determining the properties and behavior of an atom.

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Answer:

306J

Explanation:

The formula for kinetic energy is given as ½mv².

Using this, we get our answer by substituting the values into the formula.

½ × 0.145kg × 65m/s

= 306.31J

can be rounded off to 306J

Answer:

51.96 inches

Explanation:

Multiply 1.32 by 39.37

Answer:

52.0 inches

Explanation:

1.32 meters * 39.37  = 51.96 inches ~ 52.0 inches