Which of the following chemical reactions expressed correctly the role of the catalyst in the reaction?

All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.

Answer:

I've done this test a couple days ago and got a hundred. The answer you are looking for is C, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.

Explanation:

, The small the number of electrons and atom has to borrow or to lend, the greater the activity of the atom.

In the Gregorian calendar (the calendar used in most Western countries), the year begins on January 1st and ends on December 31st, lasting 365 days.

However, the Solar year (the time it takes for the Earth to make its orbit around the sun) lasts a little bit longer: 365 days 5 h 48 min 45.10 s (365.242189 days).

This means there is a gap between the Gregorian calendar and the Solar year. So, the solution given to this situation was to correct the calendar every four years by an unaccounted accumulation of approximately 1/4 of a day per year that equals one extra day, as follows:

"Leap year is divisible by 4, unless it is a secular year (last of each century, ending in 00), in which case it must also be divisible by 400."

This extra day is added in February, after day 28th. That is why every four years we have a February 29th in the Gregorian calendars or a Leap year.

Answer:

Leap years make up for the extra one-fourth day the Earth needs to orbit the sun

Explanation:

Answer:

=14.4Watts

Explanation:

Power in  a light bulb is calculated by the use of the following formula: P=VI

For the provided scenario, the current will be calculated as follows:

I=V/R

=12V/10Ω

=1.2A

Therefore P=12V×1.2A

=14.4Watts

Answer:

The difference in potential at two points in a wire causes electric current in a wire.

Explanation:

Electric Current:

The flow of Electric charges is called Electric Current.

An electric current is said to exist when there is a net flow of electric charge through a region. In electric circuits this charge is often carried by electrons moving through a wire.

Electrons move in a wire from lower potential to higher potential because, positive charge attracts the negative charge and causes it to move towards itself.

From the list of activities below, select those that can increase your carbon footprint is driving a car that uses gasoline.

The amount of carbon dioxide released into the atmosphere due to the human activities of driving a car or burning plastics, etc is called the carbon footprint.

The gasoline contained in the cars or trucks will burn due to spark in the IC engines. This result in the production of Carbon-di-oxide.

Thus, driving a car that uses gasoline increases footprint.

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Activities from the list that increase your carbon footprint include purchasing factory-processed foods, driving a gasoline-powered car, and using non-LED lights. These actions are less energy-efficient and lead to higher carbon emissions.

From the list of activities provided, those that can increase your carbon footprint include:

To reduce our carbon footprint, we can switch off lights when not in use, use bicycles, walk, use public transportation, purchase energy-efficient appliances, choose fuel-efficient vehicles, and install solar panels. Engaging in the political process and supporting policies aimed at reducing carbon emissions can also lead to greater collective environmental benefits.

Answer:

they both evaperated bye heat

Explanation:

Thermionic emission and liquid vaporization are related processes where heat is the primary driver of change. Both absorb heat for transformation, thermionic emission for release of electrons and liquid vaporization to turn into steam. They also both impact their surrounding environment.

Both thermionic emission and liquid vaporization are processes that are influenced by an increase in heat or temperature. Thermionic emission is the process whereby heat provides sufficient energy to an element enabling it to overcome forces binding it and thus, it releases electrons. On the other hand, liquid vaporization or evaporation is the process whereby a liquid takes in heat from the surroundings and transforms into a gaseous state.

The similarities between these two processes lie in the fact that both are energy-input-driven processes. In both cases, heat energy is absorbed by the substances for transformation: for thermionic emission to release of electrons and, for liquid vaporization to turn into steam. Therefore heat acts as the fundamental driver of change in both instances.

Furthermore, both processes have impact on the surrounding environment. In thermionic emission, the released electrons can affect nearby substances, and in liquid vaporization, the absorbed heat can cool the surroundings. Therefore, both these processes do not just involve the substances undergoing the changes but also influence the larger environment they are a part of.

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Answer:

A machine in which work input equals work output. energy can be used to do work, work can be used to transfer energy. The change in the kinetic energy of an object is equal to the net work done on the object.

hope this helps

Answer:

32%

Explanation:

For a heat engine, efficiency is work out divided by heat in:

η = Wₒ / Qᵢ

Since energy is balanced, heat in is the sum of work out and heat out:

Qᵢ = Wₒ + Qₒ

Therefore:

η = Wₒ / (Wₒ + Qₒ)

Given Wₒ = 710 J and Qₒ = 1480 J:

η = 710 / (710 + 1480)

η = 0.32

The thermal efficiency is 32%.

Answer:

magnitude: 100 N direction: east

Explanation:

The electrostatic force between two charges is given by

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

where

k is the Coulomb's constant

q1 and q2 are the two charges

r is the separation between the charges

In this problem, we have

[tex]q_1 = 5 \mu C = 5\cdot 10^{-6} C[/tex]

[tex]q_2 = 2 \mu C = 2\cdot 10^{-6} C[/tex]

[tex]r=3\cdot 10^{-2} m[/tex]

Substituting into the equation, we find the magnitude of the force

[tex]F=(9\cdot 10^9 N m^2 C^{-2})\frac{(5\cdot 10^{-6}C)(2\cdot 10^{-6}C)}{(3\cdot 10^{-2}m)^2}=100 N[/tex]

Concerning the direction, let's notice that:

- Both charges are positive, so the force between them is repulsive

- The charge q1 is west of the charge q2

- So, the force applied by q1 on q2 must be to the east (away from charge q1)

Answer:

Magnitude 100 N, direction East

Explanation:

Edge test answer confirmed

Electric force occurs between positive and negative electric charge. It can be calculated with formula [tex]F=\frac{Q_1Q_2}{A\epsilon_0\epsilon_r}[/tex] where F is force, Q1 and Q2 are charges, A is area of object usually ball ([tex]A=4\pi r^2[/tex]) because we describe charges as points in space like electrons and protons, [tex]\epsilon_0[/tex] is a natural dielectric constant of empty space or vacuum ([tex]\epsilon_0=8.85\times10^{-12}\mathsf{\frac{As}{Vm}}[/tex]) and [tex]\epsilon_r[/tex] also known as relative dielectric variable.

There are two types of the force:

1. Attractive electric force

2. Repulsive electric force

Attractive electric force occurs between positively and negatively charged objects while repulsive occurs between equally charged objects for eg. (positive and positive will repulse).

Answer:

C. conductor and battery

Explanation:

An electrical circuit is the part in which two or more conductors are joined in series , parallel or in mixed grouping such that when they are connected to a battery then some current will flow through it.

So here we can say that in order to make a complete circuit we need to take care that current will flow through the combination which will make a circuit

In order to flow the current we need an energy source which is done by the battery and other is the conductor which help to flow the the charge particles.

So here correct answer will be

C. conductor and battery

Answer:

A conductor and a battery

Explanation:

A electrons in the innermost energy level

Atoms form chemical bonds using their outermost electrons, also known as valence electrons. The aim is to achieve a stable electronic configuration. An example can be seen in water molecules where oxygen shares its outermost electrons with hydrogen to form covalent bonds.

Atoms form chemical bonds using their electrons in the outermost energy levels. These are known as valence electrons. The desire of atoms to reach a stable electronic configuration, often mimicking the electron configuration of noble gases, drives the formation of chemical bonds.

For example, in a water molecule (H2O), the oxygen atom shares its outermost electrons with two hydrogen atoms to form covalent bonds. These shared electrons provide each atom with a more stable electron configuration.

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Answer:

The correct answer is: B area = area

Explanation: You can solve this problem through the use of laws of Kepler's planetary motion. There are Kepler the laws ( 3 of them) In this exercise, we will use the second law. According to this law, a line segment joining a planet and the sun sweeps out areas is equal to that during the equal intervals of time

The following diagram shows the path of a planet around the Sun. Kepler discovered that area A = area B. Option A is correct.

During equal intervals of time, a line segment between a planet and the sun sweeps out regions are equal. Equal regions for equal times is Kepler's Law.

The journey of a planet around the Sun is depicted in the diagram below. Area A = area B was found by Kepler.

The regions swept away by a planet as it advances in an orbit around the Sun are equal for equal time periods. A: The equal portions of circular orbits are identical in form and size.

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Answer:

hold on let me check my answer

Explanation:

The correct answer is that the jart will reach a maximum height of approximately 10.2 meters.

To solve this problem, we need to analyze the vertical component of the jart's initial velocity separately from the horizontal component. Since the jart is tossed at a 60° angle, we can use trigonometry to find the vertical and horizontal components of the initial velocity.

First, let's find the vertical component of the velocity [tex](\(v_{y0}\))[/tex] using the sine function:

[tex]\[v_{y0} = v_0 \cdot \sin(\theta)\][/tex]

where [tex]\(v_0\)[/tex] is the initial velocity (14.1 m/s) and [tex]\(\theta\)[/tex] is the angle of the toss (60°). The sine of 60° is [tex]\(\sqrt{3}/2\)[/tex], so:

[tex]\[v_{y0} = 14.1 \cdot \frac{\sqrt{3}}{2}\][/tex]

Now, we can calculate the maximum height (h) using the kinematic equation for vertical motion:

[tex]\[v_{y}^2 = v_{y0}^2 - 2gh\][/tex]

where [tex]\(v_{y}\)[/tex] is the final vertical velocity (which is 0 m/s at the maximum height), (g) is the acceleration due to gravity (approximately 9.81 m/s ²), and (h) is the maximum height we want to find. Rearranging the equation to solve for (h), we get:

[tex]\[h = \frac{v_{y0}^2}{2g}\][/tex]

Substituting the value of [tex]\(v_{y0}\)[/tex] we found earlier:

[tex]\[h = \frac{(14.1 \cdot \frac{\sqrt{3}}{2})^2}{2 \cdot 9.81}\][/tex]

[tex]\[h = \frac{14.1^2 \cdot (\frac{\sqrt{3}}{2})^2}{19.62}\][/tex]

[tex]\[h = \frac{198.81 \cdot \frac{3}{4}}{19.62}\][/tex]

[tex]\[h = \frac{149.1075}{19.62}\][/tex]

h = 10.2 meters

Therefore, the jart will reach a maximum height of approximately 10.2 meters.

Answer:

Because the object should shrink its volume to zero, which is impossible

Explanation:

Let's talk about gases for simplicity. Ideal gases are governed by the ideal gas equation:

[tex]pV=nRT[/tex]

where

p is the gas pressure

V is the volume of the gas

n is the number of moles

R is the gas constant

T is the absolute temperature

From the formula, we see that T and V are directly proportional: therefore, in order for a gas to have an absolute temperature of zero, it must also have a volume of zero, which is impossible.

Answer:

A. 2.43 kg x 1000 g/1 kg

Explanation:

We know that the equivalence between grams and kilograms is

[tex]1 kg = 1000 g[/tex]

So, if we want to convert a mass m from kg to g, we just need to multiply the value by the factor [tex]\frac{1000 g}{1 kg}[/tex].

In this problem, the mass is

m = 2.43 kg

Therefore, multiplying by the factor above, we get

[tex]m = 2.43 kg \cdot \frac{ 1000 g}{1 kg}[/tex]

Answer:

A

Explanation:

edge 2020

Answer:

Matter & Energy

Math Review

Kinematics  

Defining Motion

Graphing Motion

Kinematic Equations

Free Fall

Projectile Motion

Relative Velocity

Dynamics

Newton's 1st Law

Free Body Diagrams

Newton's 2nd Law

Static Equilibrium

Newton's 3rd Law

Friction

Ramps and Inclines

Atwood Machines

Momentum

Impulse & Momentum

Conservation Laws

Types of Collisions

Center of Mass

UCM & Gravity

Uniform Circular Motion

Gravity

Kepler's Laws

Rotational Motion  

Rotational Kinematics

Torque

Angular Momentum

Rotational KE

Work, Energy & Power

Work

Hooke's Law

Power

Energy

Conservation of Energy

Fluid Mechanics  

Density

Pressure

Buoyancy

Pascal's Principle

Fluid Continuity

Bernoulli's Principle

Thermal Physics  

Temperature

Thermal Expansion

Heat

Phase Changes

Ideal Gas Law

Thermodynamics

Electrostatics  

Electric Charges

Coulomb's Law

Electric Fields

Potential Difference

Capacitors

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Electric Current

Resistance

Ohm's Law

Circuits

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Circuit Analysis

Magnetism  

Magnetic Fields

The Compass

Electromagnetism

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Transistors

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Processing

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Wave Characteristics

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MAGNETISM

Magnetic Fields

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Electromagnetism  

Electromagnetism

In 1820, Danish physicist Hans Christian Oersted found that a current running through a wire created a magnetic field, kicking off the modern study of electromagnetism.

Moving electric charges create magnetic fields. You can test this by placing a compass near a current-carrying wire. The compass will line up with the induced magnetic field.

To determine the direction of the electrically-induced magnetic field due to a long straight current-carrying wire, use the first right hand rule (RHR) by pointing your right-hand thumb in the direction of positive current flow. The curve of your fingers then shows the direction of the magnetic field around a wire (depicted at right).

You can obtain an even stronger magnetic field by wrapping a coil of wire in a series of loops known as a solenoid and flowing current through the wire. This is known as an electromagnet. You can make the magnetic field from the electromagnet even stronger by placing a piece of iron inside the coils of wire. The second right hand rule tells you the direction of the magnetic field due to an electromagnet. Wrap your fingers around the solenoid in the direction of positive current flow. Your thumb will point toward the north end of the induced magnetic field, as shown below.

Explanation:

Answer:

E=252J

Explanation:

The total mechanical energy of an object or system is given by:

E mech=K+U

Where K is the kinetic energy of the object and U is the potential energy of the object. The carriage, sitting motionless at the top of the hill, has only potential energy in the form of gravitational potential energy.

Gravitational potential energy is given by:

Ug=mgh

Where m is the mass of the object, g is the gravitational acceleration constant, and h is the height of the object above some specific reference point, in this case the ground 21 m below.

The weight of a stationary object at the surface of the earth is equal to the force of gravity acting on the object.

W=→Fg=mg

We are given that the carriage weighs 12 N, therefore mg=12N.

Ug=12N⋅21m

⇒Ug=252Nm=252J

Hope it helped, God bless you!

The baby carriage at the top of the hill possesses gravitational potential energy. Using the formula for potential energy (PE = m x g x h) and given values for mass, gravity, and height, we find the energy of the carriage is 823.2 Joules.  The carriage has gravitational potential energy.

The energy of the baby carriage at the top of the hill is known as gravitational potential energy, which can be calculated using the formula PE = m x g x h where m is the mass, g is the acceleration due to gravity and h is the height above the ground.

In this case, the mass (m) is 4 kg, the gravitational acceleration (g) is approximately 9.8 m/s², and the height (h) is 21 m. Plugging these values into the formula gives us a potential energy (PE) of PE = 4 kg x 9.8 m/s² x 21 m = 823.2 Joules.

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Explanation:

The velocity [tex]V[/tex] of a wave is given by:

[tex]V=\lambda.f[/tex]   (1)

Where:

[tex]\lambda[/tex]  is the wavelength of the wave

[tex]f[/tex] is the frequency of the wave. Its unit is Hertz ([tex]1Hz=\frac{1}{s}[/tex])

So, we have to find [tex]\lambda[/tex]  from equation (1):

[tex]\lambda=\frac{V}{f}[/tex]   (2)

[tex]\lambda=\frac{15km/s}{12Hz}[/tex]

Finally we obtain the wavelength of the earthquake wave:

[tex]\lambda=1.25 km[/tex]

Answer:

B

Explanation:

Transformer is a device used to convert low a.c. voltage to high a.c. voltage and vice versa.

There is two types of transformer, they are:

1.Step up transformer

It converts low a.c. voltage into high a.c. voltage.

2.Step down transformer

It converts low a.c. voltage to high a.c. voltage.

Answer:

0.5s

Explanation:

The answer is 0.5s as shown in the image attached.

Answer:

The current is proportional to the voltage and inversely proportional to the resistance. This mean if the resistance decreased and the voltage stayed constant, the current will increase.

Explanation:

Let's star with a closed circuit with a constant voltage of 48V, and a variable resistor selector of 6, 4 and 2 Ohms.

Using Ohm's Law equation [tex]I=\frac{V}{R}[/tex]

With the variable resistor selector on 6 Ohms

[tex]I=\frac{48V}{6ohms} =8A[/tex]

Changing the selector to a 4 Ohms

[tex]I=\frac{48V}{4ohms} = 12A[/tex]

Last, changing the selector to a 2 Ohms

[tex]I=\frac{48V}{2ohms} =24A[/tex]

Answer:

Two characteristics of a unit are:

It should be of convenient size.

It must be universally accepted i.e. its value must remain the same at all places and at all times.

The net force is 27 n

Answer: 91N down

Explanation:

Answer:

96 newtons is the weight of that 6 kg mass.

Explanation:

Weight equal to mass x acceleration

6 x 16

96 newtons

That 6 kg body feels that it have 9.6 kg mass. But actually not mass is constant overall universe and weight is a variable.

Weight is the product of mass and acceleration due to gravity. The weight of a 6 kg mass located on the surface of planet X is 98 N

Weight of an object is different in different planet due to differences in acceleration due to gravity. Since mass of a body is always constant.

The acceleration due to gravity on planet earth is approximately equal to 9.8 m/[tex]s^{2}[/tex]

To calculate the weight W of a body or any object, we multiply the mass m of the body with the acceleration due to gravity g of that planet. That is,

W = mg

From the given question, the parameter given are :

m = 6 kg

g = 16 m/[tex]s^{2}[/tex]

Substitute all the parameter into the formula

W = 6 x 16

W = 98 N

Therefore, The weight of a 6 kg mass located on the surface of planet X is 98 N

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1. 69.8 m

The vertical motion of the shell is a uniformly accelerated motion, with constant acceleration [tex]g=-9.81 m/s^2[/tex] towards the ground (acceleration due to gravity).

At the point of maximum height, the velocity of the projectile is zero:

v = 0

So we can find the maximum height by using the equation:

[tex]v^2 -u^2 = 2gd[/tex]

where

u = 37 m/s is the initial velocity

d is the maximum heigth

Solving for d,

[tex]d=\frac{v^2-u^2}{2g}=\frac{0^2-(37 m/s)^2}{2(-9.81 m/s^2)}=69.8 m[/tex]

2)

A projectile motion consists of two separate motions:

- A uniform motion along the x-direction, with constant velocity given by

[tex]v_x = v_0 cos \theta[/tex]

where [tex]v_0[/tex] is the initial velocity, and [tex]\theta[/tex] the angle of launch

- A unformly accelerated motion along the y-direction, with initial velocity

[tex]v_y = v_0 sin \theta[/tex]

and constant acceleration

[tex]g=-9.81 m/s^2[/tex] (acceleration due to gravity) towards the ground.

The horizontal position of the projectile at time t is given by

[tex]x(t) = v_x t[/tex]

while the vertical position is given by

[tex]y(t) = y_0 + v_0 sin \theta t + \frac{1}{2}gt^2[/tex]

where [tex]y_0[/tex] is the initial height of the projectile.

Final answer:

To calculate the maximum height an artillery shell rises, use the kinematic equation for projectile motion, substituting in the initial velocity, final velocity (0 m/s), and acceleration due to gravity, resulting in approximately 70.14 meters.

Explanation:

Calculating Projectile Motion

To calculate how high a projectile rises, we can use the following kinematic equation which is part of the projectile motion concepts:

vf^2 = vi^2 + 2ad

Where vf is the final velocity, vi is the initial velocity, a is the acceleration, and d is the displacement or height in this case. For a projectile launched vertically, its final velocity at its peak height will be 0 m/s. Hence, solving for d gives us:

d = (vf^2 - vi^2) / (2a)

Substituting the given values: vi = 37 m/s, a = -9.8 m/s2 (the negative sign indicates acceleration is opposite to the direction of the initial velocity), and vf = 0 m/s, we get:

d = (0^2 - 37^2) / (2 * -9.8)

After calculation, the maximum height the artillery shell rises is approximately 70.14 meters.

Answer:

There are 7 major organs located in the abdominal cavity.

The major organs located in the abdominal cavity include the stomach, kidneys, liver, spleen, pancreas, small intestine, and large intestine

The abdominal cavity contains two key lymphatic organs, the spleen and numerous lymph nodes. The spleen sifts pathogens from the blood while lymph nodes create and transport lymphocytes for immune defense.

The abdominal cavity houses two primary lymphatic organs: the spleen and numerous lymph nodes. The spleen is a major secondary lymphoid organ located in the upper left quadrant of the abdomen near the stomach and left kidney. Its role is to remove pathogens from the blood, hence sometimes referred to as the 'filter of the blood.'

On the other hand, the lymph nodes are small, bean-shaped organs located along the larger lymph vessels in the abdomen. They are pivotal in developing critical immune responses and also serve as a cleaning system for the lymph before the fluid is returned to the heart.

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Answer:

20,000, though, I'm not completely sure.

Explanation:

"Sound is generated along the length of the lightning channel as the atmosphere is heated by the electrical discharge to the order of 20,000 degrees C (3 times the temperature of the surface of the sun)."

Answer:

[tex]1.84\cdot 10^5 J[/tex]

Explanation:

The heat absorbed by the piece of iron is given by:

[tex]Q=mC_S \Delta T[/tex]

where:

m = 34 g is the mass of the piece of iron

[tex]C_s = 450 J/g^{\circ}C[/tex] is the specific heat of iron

[tex]\Delta T=24 C-12 C=12^{\circ}C[/tex] is the variation of temperature of the piece of iron

Substituting numbers into the formula, we find

[tex]Q=(34 g)(450 J/gC)(12 C)=1.84\cdot 10^5 J[/tex]