the earth's internal heat makes it much more dynamic than the moon. true false

Answer:

don't  

Explanation:

The mass of the block is 4.5 kg that falls by 40m and work done is -1800J.

The work done is defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object's displacement.

w=f × s

-1800=f×40

f=45 N

by Newton's 2nd law

F=ma

45=m×(10)

m=45÷10=4.5 kg

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Answer:

P=33.6 \ W

Explanation:

Mechanical Work and Power

Work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.

Being \(\vec F\) the force vector and \(\vec s\) the displacement vector, the work is calculated as:

\(W=\vec F\cdot \vec s\)

If both the force and displacement are parallel, then we can use the equivalent scalar formula:

\(W=F.s\)

Mechanical Power is the amount of energy transferred or converted per unit of time. The SI unit of power is the watt, equal to one joule per second.

The power can be calculated as:

\(\displaystyle P=\frac {W}{t}\)

Where W is the work and t is the time.

If an object of mass m has an acceleration a, the net force is:

F=m.a

The go-kart and rider have a mass of m=14 kg and accelerate at \(6 m/s^2\), thus the net force applied is:

\(F=14\cdot 6 = 84\ N\)

The work done by the cart when traveling d= 40 m is:

\(W=84\cdot 40\)

\(W=3,360\ J\)

Finally, the power for t= 100 seconds is:

\(\displaystyle P=\frac {3,360}{100}\)

P=33.6 \ W

Answer:

C. Leadville has a higher elevation.

Explanation:

In those two cities depicted in the picture, one city being further west or east does not cause significant temperature change. (Too north or too south can change this but this is not what we are supposed to find.) Rules out A.

Latitude is basically where a city is on the map, either north or south, and they have the same latitude, so B doesn't make sense.

A difference between an average high and low does nothing to why it would be colder in one place over another.

C is the logical answer for this question. The elevation, or how high you're elevated, changes the temperature. The higher the elevation, the colder it becomes since you're more closer to the clouds, and the clouds are actually really cold. Did you know that? this is why we cannot breathe outside in airplanes, it is way too cold and not enough CO2 to survive.

Given :-

To Find :-

Solution :-

As we know that ,

→ Pressure = Force/ Area

If Force is constant, then ,

→ P inversely proportional to Area

→ P = k/A

→ PA = k

We can also write it as ,

→ P₁ A₁ = P ₂ A₂

Here ,

→ A₂ = A₁/2

so that;

→ A₁ * 80,000 Pa = A₁/2 * P ₂

→ P ₂ = 80000Pa *2

→ P ₂ = 160000 Pa

Hence the required answer is 160,000 Pa .

The element which release most energy while gaining an electron is Chlorine.

Chlorine has a higher affinity for electrons than fluorine does, despite the fact that fluorine is intended to have halogens with higher electron affinity .Therefore, chlorine has the highest electron affinity among the all elements in the group.

When an electron is added to a neutral atom to create a negatively charged ion, how much energy is released. Only a few chemical elements, primarily the halogens, have values available since it is difficult to determine the affinities of atom’s electrons.

Low melting and boiling points characterize the halogens. They all react with hydrogen to create acids. Salts are easily formed when they react with metals. Their outer shell contains seven valence electrons.

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Answer:

Acceleration, a = -0.5 m/s²

Explanation:

Given the following data;

Initial velocity = 72 km/h

Final velocity = 18 km/h

Time = 10 seconds

To find the acceleration of the car;

Conversion:

72 km/h to m/s = 72*1000/3600 = 20m/s

18 km/h to m/s = 18*1000/3600 = 5 m/s

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

Substituting into the equation;

\(a = \frac{5 - 20}{10}\)

\(a = \frac{-5}{10}\)

Acceleration, a = -0.5 m/s²

Therefore, the car is decelerating.

Answer:

v = 6.72 m/s

Explanation:

Given that,

Vertical height, h = 2.31 m

We need to find the speed at the bottom of the slide. Let the speed be v. We can find it using the conservation of energy such that,

\(\dfrac{1}{2}mv^2=mgh\\\\v=\sqrt{2gh}\)

Put all the values,

\(v=\sqrt{2\times 9.8\times 2.31} \\\\v=6.72\ m/s\)

So, her speed at the bottom of the slide is equal to 6.72 m/s.

Thermal insulators stop the loss of accumulated heat, metal flat plates absorb solar radiation, and tubes absorb solar energy with the least amount of heat loss.

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Answer:

8.45m/s = recoil speed

Explanation:

Momentum = mass • velocity

9.8kg • 88.03m/s = 102.1kg • recoil speed

862.694kg•m/s = 102.1kg • recoil speed

divide both sides by 102.1kg

8.45m/s = recoil speed

The portion of the universe that has been selected for analysis is called a sample. In statistics and research, a sample refers to a subset of individuals, objects, or events that are selected from a larger population or universe for the purpose of study or analysis. The sample is chosen to represent the characteristics and variability of the entire population.

The process of selecting a sample involves careful consideration of sampling techniques to ensure that it is representative and unbiased. By studying the selected sample, researchers can make inferences and draw conclusions about the larger population.

In contrast, a frame refers to a list or source from which a sample is drawn, typically containing the elements of the population. Parameters are characteristics or properties of the population, while statistics are measurements or summaries obtained from analyzing the sample.

Therefore, the correct answer is A. sample.

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Answer:

the answer is B.

Explanation:

The ball that is thrown straight up has more kinetic energy and more speed than the ball that is thrown straight down. Both balls have the same kinetic energy and speed.

The kinetic energy of a body can be determined as the energy of a moving physical system because of its motion. Work has to be done on an object to change its kinetic energy.

The kinetic energy of the moving system can be expressed as K.E. = ½mv²  where ‘m’ is mass while ‘v’ is the velocity of the object.

The potential Energy of the physical system can be described as the energy stored due to its position. The mathematical formula for the calculation of the potential energy can be expressed in the form of P.E = m×g×h where ‘g’ is the gravitational acceleration, ‘m’ is the mass and ‘h’ is the height in meters

When two identical balls are thrown from a cliff, each with the same speed. One ball is thrown straight up, and the other ball is straight down. Both balls will have the same kinetic energy as well as speed.

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Answer:

Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a type of spiral galaxy.

Explanation:

spiral galaxy

The Milky Way is a huge collection of stars, dust and gas. It's called a spiral galaxy because if you could view it from the top or bottom, it would look like a spinning pinwheel. The Sun is located on one of the spiral arms, about 25,000 light-years away from the center of the galaxy.

Mental A has the smaller density. An object's density is defined as its mass divided by its volume.. Density is commonly expressed in grams per cubic centimeter (g/cm3).

Density is the amount of "stuff" in a given amount of space. A block of the heavier element lead (Pb), for example, will be denser than a block of the softer, lighter element gold (Au). A Styrofoam block is less dense than a brick. It is expressed in terms of mass per unit volume.

An object's density is defined as its mass divided by its volume. Density is commonly expressed in grams per cubic centimeter (g/cm3). Remember that grams are a unit of mass and cubic centimeters are a unit of volume (the same volume as 1 milliliter).

The SI density unit is m3kg. Volume Mass Density = m3kg

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The initial tension applied to the stationary belts is 1116 N.

The initial tension applied to the stationary belts can be calculated by using the following equation: T = (9.55 * P * n)/(π * D), where T is tension, P is power, n is rev/min, and D is diameter.

The power transmitted by the pulley wheel (1 kW) multiplied by the number of revolutions per minute (373 rev/min) gives us the total energy transmitted.

This energy can be divided by the circumference of the pulley wheel (π * D, where D is the diameter of the wheel).

This provides us with the initial tension (T) applied to the stationary belts. Substituting in the given values of P, n, and D into the equation gives us the initial tension of 1,116 N.

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Formula for momentum:

\(p=mv\)

momentum(measured in kg*m/s) = mass(measured in kg) * velocity(measured in m/s)

__________________________________________________________

Given:

\(m=3kg\)

\(v=3m/s\)

\(p=?\)

__________________________________________________________

Finding momentum:

\(p=mv\)

\(p=3\times3\)

__________________________________________________________

Answer:

\(\fbox{p = 9 kg*m/s}\)

a) Moore’s Law is a prediction that was first made by Gordon Moore, the co-founder of Intel Corporation, in 1965. The law suggests that the number of transistors that can be placed on a computer chip will double every two years, while the cost of manufacturing the same will halve.

This has led to the incredible growth in the computing industry and has allowed for the development of smaller, more powerful devices at a cheaper cost. Moore’s Law has been highly successful in the advancement of electronics because it has acted as a guide to technology developers and has provided a framework for their research and development. With the understanding that the number of transistors would double every two years, developers have been able to set achievable goals that have allowed them to achieve this prediction. This has led to the development of ever-more powerful computer chips that have revolutionized the way that people live and work.

b) A Metal-Oxide-Semiconductor (MOS) capacitor is a type of capacitor that is commonly used in electronic circuits. The MOS capacitor consists of a metal electrode, a semiconductor substrate, and an oxide layer that separates the metal electrode from the substrate. The MOS capacitor is used to store charge and to control the flow of current in a circuit.

There are two types of MOS capacitors: the depletion-mode MOS capacitor and the enhancement-mode MOS capacitor. The depletion-mode MOS capacitor is normally on, which means that it conducts current when no voltage is applied to it. The enhancement-mode MOS capacitor, on the other hand, is normally off, which means that it does not conduct current until a voltage is applied to it.

The MOS capacitor is an important component in many electronic circuits because it allows for the precise control of charge and current flow. It is widely used in digital circuits, where it is used to store charge and to control the switching of current between different circuits.

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The speed of the bullet immediately before impact was 361.7 m/s.

The speed of the bullet immediately before impact can be calculated using the law of conservation of momentum and the work-energy theorem.

The impact of the bullet causes the wooden block to move with kinetic energy, which is then dissipated through kinetic friction as it slides to a stop.

The equation for this process is:Initial momentum = Final momentum(12.0 g)(v) = (12.0 g + 98 g)(v')where v is the initial speed of the bullet and v' is the final speed of the block and bullet after impact.

Using the work-energy theorem, we can relate the kinetic energy of the block and bullet to the work done by

kinetic friction:Initial kinetic energy = Work done by kinetic friction(1/2)(12.0 g + 98 g)(v')^2 = (0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)

Solving for v' and substituting back into the initial momentum equation gives:

(12.0 g)(v) = (12.0 g + 98 g)(√[(0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)] / (12.0 g + 98 g))v = √[(0.650)(12.0 g + 98 g)(9.8 m/s^2)(7.5 m)] / (12.0 g)v = 361.7 m/s

Therefore, the speed of the bullet immediately before impact was 361.7 m/s.

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According to Heisenberg's Uncertainty Principle, it is impossible to determine the position and momentum of a particle with absolute certainty at the same time. The Uncertainty Principle is defined as Δx * Δp ≥ h/4π, where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.
For the given problem, the uncertainty in position of a proton with mass 1.673 x 10-27 kg and kinetic energy 1.2 keV can be calculated as follows:

We know that the momentum p of a particle is given by p = mv, where m is the mass of the particle and v is its velocity.
The kinetic energy of the proton can be converted to momentum using the equation E = p²/2m, where E is the kinetic energy.
1.2 keV = (p²/2m)    (1 eV = 1.6 x 10^-19 J)
p²/2m = 1.92 x 10^-16 J
The momentum p of the proton can be calculated by taking the square root of both sides:
p = √(2mE) = √(2 x 1.673 x 10^-27 x 1.6 x 10^-16) = 7.84 x 10^-22 kg m/s

Using Heisenberg's Uncertainty Principle, we can calculate the uncertainty in position as follows:
Δx * Δp ≥ h/4π
Δx ≥ h/4πΔp
Substituting the values of h, Δp, and solving for Δx:
Δx ≥ (6.626 x 10^-34)/(4π x 7.84 x 10^-22)
Δx ≥ 2.69 x 10^-12 m

Therefore, the uncertainty in position of the proton is 2.69 x 10^-12 m.

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Answer:

a force is a movement on a object such as kinetic energy

The car is going at 24.6 m/s after undergoing an acceleration of 4.2 m/s2 over a distance of 450 m.

The velocity of the car initially was 9.6 m/s and the distance covered by the car is 450 m. The acceleration of the car is 4.2 m/s2. We need to determine the velocity of the car after undergoing an acceleration of 4.2 m/s2. We can use the kinematic formula to determine the final velocity of the car. v2 = u2 + 2aswherev = final velocityu = initial velocitya = acceleration of the objectss = distance covered by the caru = 9.6 m/sa = 4.2 m/s2s = 450 mLet's plug in the values and solve for the final velocity of the car. We have:v2 = u2 + 2asv2 = (9.6)2 + 2(4.2)(450)v2 = 92.16 + 3780v2 = 3872.16Taking the square root of 3872.16, we get:v = 62.22 m/s. Therefore, the car is going at 24.6 m/s after undergoing an acceleration of 4.2 m/s2 over a distance of 450 m.

Given that the velocity of the car initially was 9.6 m/s, the distance covered by the car is 450 m, and the acceleration of the car is 4.2 m/s2. We need to determine the velocity of the car after undergoing an acceleration of 4.2 m/s2.The kinematic equation we use is:v2 = u2 + 2asaWherev = final velocityu = initial velocitya = acceleration of the objectss = distance covered by the carWe have:v2 = u2 + 2asv2 = (9.6)2 + 2(4.2)(450)v2 = 92.16 + 3780v2 = 3872.16Taking the square root of 3872.16, we get:v = 62.22 m/sTherefore, the car is going at 24.6 m/s after undergoing an acceleration of 4.2 m/s2 over a distance of 450 m.

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Answer:

The maximum possible efficiency of an automobile engine with an exhaust temperature of 120°C and a burning gas temperature of 620°C is 0.46, which corresponds to Option D.

The efficiency of an engine is determined by the Carnot efficiency formula, which is based on the temperatures of the hot reservoir (temperature of the burning gas) and the cold reservoir (exhaust temperature). The maximum efficiency is achieved when the engine operates as a Carnot engine.

Using the Carnot efficiency formula:

Efficiency = 1 - (Tc / Th)

Where Tc is the temperature of the cold reservoir (exhaust temperature) and Th is the temperature of the hot reservoir (burning gas temperature).

Plugging in the given values:

Efficiency = 1 - (120°C / 620°C) = 1 - 0.1935 ≈ 0.8065 ≈ 0.46 (rounded to two decimal places)

Therefore, the correct answer is Option D, 0.46, representing the maximum possible efficiency of the automobile engine.

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To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.

The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.

In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.

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The focus of the enlightenment is (d) government and ethics.

The primary objective of the Enlightenment intellectuals was social reform, and they offered the first significant opposition to the autocracy and theocracy that had long ruled society. Science was one of the most important means of advancing change.

People throughout this time period challenged conventional wisdom and believed that rational reform could enhance humanity.

The philosophers of the Enlightenment believed that Natural Law, rather than antiquated laws recorded in an ancient book, governed mankind. Science also grew beyond its traditional domains of physics, astronomy, natural science, and alchemy/chemistry to include economics, social science, and political science.

Government and ethics were the Enlightenment's primary focuses. They focused on addressing issues with the government, equality, and other societal issues.

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The angular acceleration is -1.33 revolutions per second.

The angular acceleration can be calculated using the following formula:
Angular acceleration (α) = (Final angular velocity - Initial angular velocity) / Time


Initial angular velocity = 1200 revolutions per minute (rpm) = 20 revolutions per second (rps)
Final angular velocity = 0 revolutions per second (rps)
Time = 15 seconds
Angular acceleration (α) = (0 - 20) / 15 = -1.33 revolutions per second squared (rps2)

Moreover, the temporal rate at which angular velocity changes is known as angular acceleration. The standard unit of measurement is radians per second per second. Therefore, = d d t. Rotational acceleration is another name for angular acceleration. A rigid body's points all share the rotating velocity and acceleration. Here, The rotation is in the clockwise direction and the angular acceleration is negative.

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Answer:

To find the slope, we need to have co-ordinates of atleast 2 points lying on the line.

In this case, the 2 points are

(-3,1) and (2,-2)

To find the gradient we put in the following rule :

Rise / Run = (y2 - y1) / (x2-x1) = (-2-1) / (2+3) = -3 /5

Explanation:

Answer:

24.4 m

Explanation:

sin 30 =  12.2 / x

x = 12.2 / sin 30    =  24.4 m

The distance covered by Mr. John is 24.4 meters.

An angle is a figure in Euclidean geometry made up of two rays that share a common terminal and are referred to as the angle's sides and vertices, respectively.

Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles. We refer to these as dihedral angles. The angle formed by the rays lying perpendicular to the two crossing curves at the point of junction is another property of intersecting curves.

Given parameters:

Height of the slide: h = 12.2 meters.

Angle of inclination of the inclined plane =  30°

Let the distance covered by Mr. John is x meters.

Then from trigonometry, we can write:

sinα = perpendicular/ hypotonias

sin 30° =  12.2 / x

x = 12.2 / sin 30°  

x = 24.4 meters

Hence, the distance covered by Mr. John is 24.4 meters.

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The electric potential at a point 4d away from the charged particle is one-fourth of the electric potential at a distance d from the charged particle, or 19 * (1/4) = 4.75 nV.

The electric potential (V) at a point due to a point charge (Q) is given by the formula:

V = k * Q / r

where k is the Coulomb constant (8.99 x 10^9 N m^2/C^2), Q is the charge of the particle, and r is the distance from the point charge to the measurement point.

Given that the electric potential at a distance d from the charged particle is 19 nV, we can find the value of Q:

Q = V * r / k = 19 * 10^-9 * d / (8.99 * 10^9)

The electric potential at a point 4d away from the charged particle is given by:

V' = k * Q / (4d) = k * Q / 4r = (k / 4) * Q / r = (1/4) * V

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Explanation:

According to newtons first law of motion " A body is at a state of rest or uniform motion unless acted upon by a force (external)" which will either

1. change the direction

2. change the acceleration

3. change the velocity(moves or stop the body from moving)

4. change the shape or size