If the arm 3 in the following figure rotates at 300 rev/min cow, find the speed and direction of rotation of internal gear 7. 7 1547 40T 361 607 20T 18T Select one: O a. w7 = 324 rev/min Cow O b.wy = 324 rev/min cw O c.wy = 222.1 rev/min cw O d. w7 = 222.1 rev/min cow

Answer:its b

Explanation: i took the test

Answer:

APA and MLA are the two format sources.

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Answer:

4 kg

Explanation:

F = ma

m = f/a   = 12 N / 3 m/s^2 = 4 kg    

Linguists call small units of sound that carry meaning on their own "morphemes".

Actually, phonemes are the smallest units of sound in a language that can distinguish meaning. They are abstract units of sound that differentiate one word from another word in a language. For example, in English, the sounds /p/ and /b/ are phonemes because they distinguish words like "pat" and "bat".

Morphemes, on the other hand, are the smallest units of language that carry meaning. They can be made up of one or more phonemes. For example, the word "cats" has two morphemes: "cat" and "-s" (which indicates plurality), and each of these morphemes is made up of phonemes.

So while phonemes are important in distinguishing meaning, morphemes are the smallest units of language that carry meaning on their own.

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Answer:

m=F/a

= 44/4

 = 11 m

Explanation:

Just use the formula F=ma

Answer:

a. Volts = current x resistance

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR\)

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Hence, Ohm's law gives the relationship between voltage, current and resistance of an electric circuit.

Claim: Radio waves useful in the world around us. Evidence: Radio waves are used for communication, such as in television, radio, and cellular networks. Reasoning: Radio waves are ideal for communication because they can travel through the atmosphere.

Radio waves are used for communication. Waves also play crucial role in scientific research, from detecting gravitational waves to studying behavior of atoms and molecules.

Different frequencies of radio waves are used for television and FM and AM radio broadcasts, military communications, mobile phones, ham radio, wireless computer networks, and number of other communications applications. Most radio waves pass freely through the atmosphere of Earth.

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The reason for the deflection of the compass from the magnetic north of the Earth when a current-carrying wire is placed over Magnetic effect due to current carrying wire.

What is Magnetic effect ?

Magnetic effect refers to the influence that a magnet or a magnetic field has on other magnets, magnetic materials, or moving charges. This effect is a result of the physical properties of magnetic fields, which are created by moving charges, such as electrons.

The magnetic effect is responsible for various phenomena, including the attraction or repulsion of magnets, the creation of magnetic fields around current-carrying wires, the behavior of moving charges in a magnetic field, and the generation of electricity in electric generators.

The reason for the deflection of the compass from the magnetic north of the Earth when a current-carrying wire is placed over it is option (a) - Magnetic effect due to current carrying wire.

When a current flows through a wire, it creates a magnetic field around the wire. This magnetic field can interact with the magnetic field of the Earth, causing the compass needle to deflect from its original direction. This phenomenon is known as the magnetic effect of a current-carrying wire.

Therefore, she action of connecting a battery to the wire and placing it over the compass caused a current to flow through the wire, which in turn created a magnetic field around the wire, leading to the deflection of the compass needle.

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Answer:

A reaction force

Explanation:

The box is not moving downward because the table is applying an equal and opposite amount of force on the box.

This is the premise of Newton's third law of motion which states that "action and reaction are equal and opposite".

The action force impacted by the downward pull on the table is being cancelled out by the upward force of the table.

B) The correct answer is "turning a coil of wire in a magnetic field." An electric generator converts mechanical energy into electrical energy through electromagnetic induction.

When a coil of wire is rotated in a magnetic field, the magnetic field lines cut across the wires, inducing a voltage in the wire and generating an electric current. This process is similar to the way a motor works, but in reverse. In a motor, electrical energy is converted into mechanical energy by using the magnetic fields to produce a rotational force.

The other answer choices, forming chemical bonds, breaking chemical bonds, and making electrons move at nearly the speed of light, all involve chemical or physical changes in the material. While these processes can release energy and generate electrical currents in certain circumstances, they are not the primary mechanism by which an electric generator works.

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Complete Question:

an electric generator works by group of answer choices forming chemical bond to release energy.

A. causing electric charge to flow.

B. turning a coil of wire in a magnetic field.

C. making electrons move at nearly the speed of light in a wire.

D. breaking chemical bond to release energy.

When 1 kg of water (specific heat 4200 j/(kg c)) and 1 kg of a mystery substance are combined, the mystery substance has a heat capacity of 8400 J/kg C. Initial water temperature is 35 c.

The quantity of heat that must be applied to an object in order to cause a unit change in temperature is known as the specific heat  or thermal capacity of that object. Joules per kelvin (J/K) is the SI unit for heat capacity. An extensive property is heat capacity. The unidentified compound was discovered to be extremely similar to the drug fluoxetine but not exactly the same. In actuality, the two compounds are isomers, which are atoms that are bound to one another in distinct ways despite having the same number and type of atoms.

1*4200(35-25) = 1*C(25-20)

C = (1*4200*10)/5

C = 8400J/kg C

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The initial energy of the car is 271,025 J, the final energy is 1,084,400 J, and the work done on the car to increase its speed is 813,375 J.

To solve this problem, use the formulas for kinetic energy and work.

The initial kinetic energy (KEi) of the car is given by:

KEi = (1/2) × mass × velocity²

Substituting the values:  

KEi = (1/2) × 875.0 kg × (22.0 m/s)²

KEi = 271,025 J

The final kinetic energy (KEf) of the car is given by:

KEf = (1/2) × mass × velocity²

Substituting the values:

KEf = (1/2) × 875.0 kg × (44.0 m/s)²

KEf = 1,084,400 J

The work done on the car is given by the change in kinetic energy:

Work = KEf - KEi

Substituting the values:

Work = 1,084,400 J - 271,025 J

Work = 813,375 J

Therefore, the initial energy of the car is 271,025 J, the final energy is 1,084,400 J, and the work done on the car to increase its speed is 813,375 J.

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When, a 20.0 kg mass hanging vertically causes a spring to stretch by 50 cm. Then, the approximate constant of the spring is approximately 392 N/m.

To find the spring constant (k), we can use Hooke's Law, which states that the force exerted by a spring is proportional to the displacement from its equilibrium position. Mathematically, this can be expressed as;

F = -kx

where F will be the force applied to the spring, k will be the spring constant, and x will be the displacement from the equilibrium position.

Given;

Mass (m) = 20.0 kg

Displacement (x) = 50 cm

= 0.5 m

The force exerted by the mass can be calculated using Newton's second law;

F = mg

where g will be the acceleration due to gravity (approximately 9.8 m/s²).

F = (20.0 kg)(9.8 m/s²)

F ≈ 196 N

Now, we will substitute the values into Hooke's Law equation;

196 N = -k(0.5 m)

To solve for the spring constant (k);

k = -(196 N) / (0.5 m)

k ≈ -392 N/m

The negative sign will indicates that the force exerted by the spring is in the opposite direction of displacement. Therefore, the approximate constant of the spring is approximately 392 N/m.

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Answer:

75 km/hour

Explanation:

Total distance travelled= 200+25 = 225 km
Total time= 2+1 hours = 3 hours
Average speed= Total Distance/Total time = 225/3 = 75 km/hr

The new power source that made it possible to build factories away from running water is the steam engine.

The steam engine was a significant invention of the industrial revolution and paved the way for many technological advancements of the era.

The steam engine is an external combustion heat engine that produces mechanical energy using water or steam as the working fluid. It was invented by James Watt in the 1760s and was used primarily for pumping water out of coal mines. In conclusion, the steam engine was the new power that made it possible to build factories away from running water during the Industrial Revolution.

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When a proton is moved in the direction opposite to an external electric field, the statement that best describes what is happening to the proton in this scenario is "it is moving from high potential to low potential and the electrical potential energy of a system consisting of the proton and the electric field is decreasing."

Potential energy is defined as the energy stored within an object due to its position or configuration. In this case, the proton is moving against the direction of the electric field, which means that it is losing potential energy.

As a result, the electrical energy of the system consisting of the proton and the electric field is also decreasing.

It is important to note that the movement of the proton in this scenario is in opposition to the direction of the electric field, which means that external work is being done on the proton to move it against the field lines.

This work is what causes the decrease in the electrical potential energy of the system.

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When a proton is moved in the opposite direction of an external E-field, it is moving from a region of high electric potential to low electric potential.

The correct statement that describes what is happening to the proton is that it is moving from high potential to low potential, and the electrical potential energy of a system consisting of the proton and the electric field is decreasing. This is because the electric potential energy is proportional to the distance between the proton and the source of the electric field, and moving the proton in the opposite direction of the electric field reduces the distance between them, resulting in a decrease in electric potential energy. In addition, the proton is experiencing a force opposite to the direction of the electric field, which means that the electrical energy of the system is being converted to kinetic energy of the proton. Overall, the movement of the proton in the opposite direction of the electric field results in a decrease in electrical potential energy and an increase in kinetic energy.

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➢ 1. force = mass × acceleration

➢ 2. Since unit of weight = kg•m/s²

Answer:

Force =  Mass x Acceleration

Hope this helps.

Answer:

Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".

Answer: She moves 5.616 meters in that second.

Explanation:

If we define t = 0s as the moment when she starts decelerating we can write the function of acceleration as:

a(t) = -(0.63 m/s^2)

where the negative sign is because she is slowing down.

The velocity equation can be found if we integrate over time:

v(t) = -(0.63m/s^2)*t + v0

Where v0 is the constant of integration, that represents the initial velocity, in this case is:

v0 = 32.7 km/h

Now, because the acceleration is in m/s^2, we should write this velocity in m/s.

in one km we have 1000 meters, and in one hour we have 3600 seconds, then we have that:

32.7 km/h = 32.7 *(1000/3600) m/s = 9.08 m/s

Then the velocity equation becomes:

v(t) = -(0.63m/s^2)*t  + 9.08 m/s

And for the position equation, we should integrate again to get:

p(t) = -(1/2)*(0.63m/s^2)*t^2 + (9.08m/s)*t + p0

Where p0 is the initial position.

For this problem, we want to find the distance that she moved between t = 5s and t = 6s, and that can be calculated as:

D = p(6s) - p(5s)

D = -(1/2)*(0.63m/s^2)*(6s)^2 + (9.08m/s)*6s + p0 +(1/2)*(0.63m/s^2)*(5s)^2 - (9.08m/s)*(5s) - p0

D = -(1/2)*(0.63m/s^2)*((6s)^2 - (5s)^2) + (9.08m/s)*(6s - 5s)

D = 5.615 m

She moves 5.616 meters in that second.

A girl rides her cycle round a circular track of diameter 60 m. The track is banked at 15° to the horizontal. The coefficient of friction between the track and the tyres of the cycle is 0.25. Modelling the girl and her cycle as a particle of mass 60 kg moving in a horizontal circle, the minimum speed at which she can travel without slipping is 13.64 m/s.

To find the minimum speed at which the girl can travel without slipping, we need to consider the forces acting on her and her cycle as they move in a circular track.

The forces acting on the girl and her cycle are the gravitational force (mg), the normal force (N), and the frictional force (f). The frictional force provides the centripetal force necessary to keep the girl moving in a circular path.

The normal force can be resolved into two components: the vertical component (N⊥) and the horizontal component (N∥). The vertical component balances the gravitational force, while the horizontal component provides the centripetal force.

Mass of the girl and cycle (m) = 60 kg

Diameter of the circular track (d) = 60 m

Bank angle (θ) = 15 degrees

Coefficient of friction (μ) = 0.25

Find the normal force components:

N⊥ = mg cos(θ)

N∥ = mg sin(θ)

The frictional force:

f = μN⊥

The frictional force (f) provides the centripetal force required for circular motion:

f = m(v² / r)

Here, v is the velocity and r is the radius of the circular track. The radius is:

r = d / 2

Combining the equations, we have:

μN⊥ = m(v² / r)

Substituting the values we have:

μmg cos(θ) = m(v² / (d / 2))

v² = (μmg cos(θ) / m) * (d / 2)

v² = (μg cos(θ)) * (d / 2)

v = √((μg cos(θ)) * (d / 2))

v = √((0.25 * 9.8 * cos(15)) * (60 / 2))

v ≈ 13.64 m/s

Therefore, the minimum speed at which the girl can travel without slipping is approximately 13.64 m/s.

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Explanation:

from the given choices it can only be

the shape of Earth.

at any moment of time, because of the ball shape, there are areas on Earth in full, direct sunlight, areas with dimmer light due to narrower angles of sight to the sun, and areas without any light ("night").

what I am missing here is the inclination of the Earth's rotational axis towards its orbital plane around the sun. that is what changes the angle is sunlight over the year in general creating the seasons in the 2 hemispheres.

Answer: The shape of the Earth

Explanation:

I took the test duh

Answer:

 The state when the two objects have reached the same temperature is known as thermal equilibrium.

Answer:

0.36 m

Explanation:

The moment of inertial of a wheel can be calculated as

Where r is the radius of the wheel and m is its mass.

Solving the equation for r, we get

So, replacing I by 0.13 kg m2 and m by 0.98 kg, we get

Therefore, the radius of the wheel is 0.36 m

Answer:

1.67m/s

Explanation:

Total Distance to be travelled by a Runner=100m

Time Taken=10*6s

Speed=Distance/Time

=100/10*6=10/6=1.67m/s

The answer you are looking for is approximately 1.67 m/s.

Solution/Explanation:

Distance Ran: 100 m.

Time ran: 10x6s, or 60s, or one minute.

Speed: Unknown?

Writing out the formula for speed, using distance and time,

S=D/T.

S=Speed.

D=Distance.

T=Time.

Substituting the given values of the variables,

S=100 m/10x6s, or S=100 m/one minute, or S=100 m/60s.

100÷60=1.6667≈1.67.

So, therefore, the final answer is approximately 1.67 m/s.

I hope that this has helped you. Enjoy your day, and take care.

Answer:

Option D.

Explanation:

Data:

Use formula:

Replace:

Multiply gravity with height:

Multiply:

Solve the square root:

How fast is the ball going?

The speed is going at a speed of 13.3 meters per second.

Answer: 11 m/s

vinitial=2 m/s

time=3 s

acceleration = 3 m/s^2

vfinal = ?

The key here is that it is a constant acceleration, so we can use the constant acceleration equations. The easiest one to use would be:

vfinal=vinitial + a*t

We need vfinal, so algebraically we are ready to put in numbers into the equation:

vfinal=vinitial + a*t = 2 m/s + (3 m/s^2)*(3 s ) = 11 m/s is the final velocity

The ball's final velocity is 11 m/s

From one of equations of kinematics for linear motion

We have that

v = u + at

Where v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time

From the given information in the question

u = 2 m/s

t = 3 secs

a = 3 m/s²

Putting these parameters into the above formula

v = u + at

We get

v = 2 + (3×3)

v = 2 + 9

v = 11 m/s

Hence, the ball's final velocity is 11 m/s

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Based on the circled elements in the periodic table’s location, we could infer that most of the circled elements are gases at room temperature. The correct answer is B.

There are 11 elements that are in gaseous state at room temperature. They are Hydrogen (H), Helium (He), Neon (N), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), Fluorine (F), Chlorine (Cl), Nitrogen (N) and Oxygen (O).

Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and also are found as diatomic molecules (H2, N2, O2, F2, Cl2).

Although part of your question is missing, you might be referring to this full question: Consider the circled elements in the periodic table as seen on attached image. Based on their location, we could infer that most of them are:

A) very reactive gases.

B) gases at room temperature.

C) do not react readily with metals.

D) nonreactive solids at room temperature.

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