What was 15 A pendulum bob has a mass of 1 kg. The length of the pendulum is 2 m. The bob is pulled to one side to an angle of 10° from the vertical. A) What is the velocity of the pendulum bob as it swings through its lowest point? b) What is the angular velocity of the pendulum bob?​

Answer:

a skipping

Explanation:

this is for brainly

Power walking is much easier on the body and is the same fitness as running, so option c is correct.

Humans and other animals may move quickly on foot by using the terrestrial locomotion technique known as running. All the feet are raised above the ground during the aerial phase of running (though there are exceptions). While walking, the center of gravity always vaults over the stance leg or legs in an inverted pendulum motion, the legs are mostly kept straight, and one foot is constantly in touch with the ground.

When you power walk then the heartbeats increase, and you can maintain it for a longer time, therefore, a power walk is more efficient for weight loss or fat loss than running.

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The change will double the electric field between the plates is (a) Bring the plates so that they are 0.01 m apart.

The electric field between the plates of a parallel plate capacitor is given by E = V/d, where V is the voltage between the plates and d is the distance between them.

a) If the plates are brought closer together to a distance of 0.01 m, the electric field between them will double. The new electric field will be E = (1000 V)/(0.01 m) = 100,000 V/m.

b) This statement is incorrect. Changing the distance between the plates or the area of the plates will affect the electric field, but not necessarily double it.

c) Increasing the voltage across the plates to 1500 V will not double the electric field. The new electric field will be E = (1500 V)/(0.02 m) = 75,000 V/m.

d) Increasing the area of the plates will not double the electric field. The new electric field will be E = (1000 V)/(0.02 m) = 50,000 V/m, which is half the original electric field.

e) Increasing the distance between the plates to 0.04 m will not double the electric field. The new electric field will be E = (1000 V)/(0.04 m) = 25,000 V/m, which is one-fourth the original electric field.

Therefore, the correct answer is (a) Bring the plates so that they are 0.01 m apart.

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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:

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

Linear momentum is a physical quantity that describes the motion of an object in a straight line. It is the product of an object's mass and its velocity, and it has both magnitude and direction. The direction of the linear momentum is the same as the direction of the object's velocity. In other words, linear momentum is a vector quantity.

Angular momentum, on the other hand, is a physical quantity that describes the rotational motion of an object. It is the product of an object's moment of inertia and its angular velocity, and it also has both magnitude and direction. The direction of the angular momentum is perpendicular to the plane of rotation, and it is defined by the right-hand rule. In other words, angular momentum is also a vector quantity.

In summary, the main difference between linear momentum and angular momentum is the type of motion that they describe. Linear momentum describes the motion of an object in a straight line, while angular momentum describes the rotational motion of an object.

Explanation:

When ice melts at \(0^{\circ}C\), it requires some energy in the form of heat called the latent heat of fusion.

This is the energy required to melt the ice into the water at \(0^{\circ}C\). This energy changes the state of ice from solid to liquid.

Similarly, the same amount of energy must be extracted to convert water into ice.

Although energy is provided, the temperature is not changing because that energy is used to change the state of water.

Answer: Plasma is made up of groups of positively and negatively charged particles but particles of a gas are mostly uncharged.

Explanation:

Because unlike ordinary gases, plasmas are made up of atoms in which some or all of the electrons have been stripped away and positively charged nuclei, called ions, roam freely.

The potential energy and kinetic energy are constantly changing because of law of energy conservation as the kinetic energy is constantly being converted into potential energy and vice versa.

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

The total mechanical energy of any system is made up of kinetic energy and potential energy.

The kinetic energy is the energy of the object due to its motion while the potential energy is the energy of the object due to its height above the ground.

Based on the law of conservation of energy, the kinetic energy of an object can be converted into potential energy and from potential energy to kinetic energy.

Thus, the potential energy and kinetic energy are constantly changing because of law of energy conservation as the kinetic energy is constantly being converted into potential energy and vice versa.

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Answer:

B

Explanation:

The first modern personality test was the Woodworth Personal Data Sheet, which was first used in 1919. It was designed to help the United States Army screen out recruits who might be susceptible to shell shock.

so, B is correct

Answer:

The answer is B, I hope this helps.

Answer:

Conductor

Explanation:

A battery holds all of the energy in itself. So without the battery, the circuit cannot work.

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The most common structures cutting across mid-oceanic ridges are transform faults, seamounts, and abyssal hills. These features are created by the movement of tectonic plates and volcanic activity.

Transform faults occur where two plates slide past each other, while seamounts are underwater mountains created by volcanic eruptions. Abyssal hills are smaller, more rounded features that are thought to be created by the stretching and cooling of the Earth's crust.

Mid-oceanic ridges are areas where tectonic plates are spreading apart, creating new oceanic crust. Along these ridges, a number of different geological features can be found. Transform faults are areas where plates slide past each other, creating earthquakes and other seismic activity.

Seamounts are underwater mountains that can be hundreds of meters tall, and are created by volcanic activity. Abyssal hills are smaller, more rounded features that are thought to be created by the stretching and cooling of the Earth's crust. Together, these features give us a better understanding of how the Earth's crust is created and shaped by tectonic forces.

In conclusion, the most common structures cutting across mid-oceanic ridges are transform faults, seamounts, and abyssal hills. These features are all created by the movement of tectonic plates and volcanic activity, and provide valuable insights into the Earth's crust and the forces that shape it.

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Answer:

Explanation:

The answer is the layer right under the convection current, C and D. The heat is generated by radioactive decay of heavy elements in the Earth core.

What is the heat source for convection currents in layer E?

O A

O B✓

O C

O D

The 2008 solar minimum is nevertheless regarded as a typical occurrence of the solar cycle, which typically lasts an average of 11 years, despite these alterations.

The solar minimum that occurred around 2008 lasted roughly 12 months, just like those in earlier solar cycles. Even though there weren't many sunspots visible for a while, it was noted for being extraordinarily lengthy and deep.

This one lived longer and deteriorated more gradually than the earlier ones. There were also fewer sunspots and solar flares visible throughout the cycle in 2008 due to the solar minimum occurring at a period of exceptionally low solar activity.

The 2008 solar minimum is nevertheless regarded as a typical occurrence of the solar cycle, which typically lasts an average of 11 years, despite these alterations.

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Answer:

90 mAmps

Explanation:

V=IR

V/R = I

9 v / 100 ohm = .09 amps = 90 mAmps

Resource conservation plays a crucial role in benefiting the environment in multiple ways. Therefore, correct answer is d. All of the above.

Resource conservation plays a crucial role in benefiting the environment in multiple ways. Firstly, by conserving resources, such as forests and wetlands, natural habitats can be preserved, promoting biodiversity and protecting endangered species (option a).

Secondly, resource conservation can help reduce water pollution by implementing efficient water management practices, preventing overuse and contamination (option b). Additionally, resource conservation contributes to the reduction of air pollution by promoting energy efficiency, sustainable transportation, and the use of renewable energy sources (option c).

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Answer: distance, velocity, acceleration and displacement.

Explanation:

Parameters is a numerical or other measurable factor forming one of a set that defines a system or sets the conditions of its operation. So while solving equations of motion we should keep distance, velocity, acceleration and displacement (parameters in mind).

The time it took to walk the distance on the escalator is the same as it would have taken to walk the same distance on the stairs.

To calculate the time gained by getting on the escalator, we need to compare the time it takes to walk the distance on the escalator with the time it would have taken to walk the same distance on the stairs.

Escalator speed: 0.7 m/s

Distance of the escalator: 20 m

Walking speed on the escalator: 2.6 m/s

Let's first calculate the time it takes to walk the distance on the escalator:

Time on escalator = Distance / Speed = 20 m / 2.6 m/s

Now, let's calculate the time it would have taken to walk the same distance on the stairs:

Time on stairs = Distance / Speed = 20 m / 2.6 m/s

To find the time gained, we subtract the time on stairs from the time on the escalator:

Time gained = Time on escalator - Time on stairs

Plugging in the values:

Time gained = (20 m / 2.6 m/s) - (20 m / 2.6 m/s)

Simplifying the expression:

Time gained = 7.6923 s - 7.6923 s = 0 s

Therefore, by getting on the escalator, you didn't gain any additional time. The time it took to walk the distance on the escalator is the same as it would have taken to walk the same distance on the stairs.

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9) A vector describe as a quantity that has both magnitude and direction. 10) We use vectors to describe in physics in physical quantities, including displacement, velocity, acceleration, force, momentum, and torque.

The vector is typically represented by an arrow, with the length of the arrow representing the magnitude of the vector and the direction of the arrow representing the direction of the vector. In addition to the magnitude and direction, vectors also have a starting point and an end point. Vectors can be added together to obtain a resultant vector that represents the sum of the individual vectors. Vectors can also be subtracted, multiplied by a scalar, or divided by a scalar.

For example, displacement is a vector that describes the distance and direction between two points. Velocity is a vector that describes the speed and direction of motion and acceleration is a vector that describes the rate at which velocity changes. Force is a vector that describes the push or pull on an object and momentum is a vector that describes the motion of an object and its resistance to change. Torque is a vector that describes the rotational motion of an object. So therefore vectors are an important tool for physicists because they allow them to describe physical quantities in a way that is both concise and precise.

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The current in the wire can be found using Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R).

First, we need to find the voltage (V) induced in the wire due to the changing magnetic field. We know that the emf (electromotive force) induced in a circuit is given by Faraday's Law, which states that emf equals the rate of change of magnetic flux through the circuit. In this case, the circular path of radius 8 cm is perpendicular to the solenoid's magnetic field, so the magnetic flux through the path is proportional to the magnetic field strength.

Since the problem states that the magnetic field is increasing, we can assume that the rate of change of magnetic flux is constant. Therefore, we can write:

emf = -N d(phi)/dt

where N is the number of turns in the wire (which is not given in the problem), and d(phi)/dt is the rate of change of magnetic flux through the path. The negative sign in front of the equation indicates that the induced emf opposes the change in magnetic flux.

We are given that emf = 25 volts, so we can rewrite the equation as:

25 = -N d(phi)/dt

Solving for d(phi)/dt, we get:

d(phi)/dt = -25/N

Since the magnetic flux through the path is proportional to the magnetic field strength, we can write:

d(phi)/dt = A dB/dt

where A is the area of the circular path and dB/dt is the rate of change of magnetic field strength. Substituting this into the previous equation, we get:

A dB/dt = -25/N

We are given that the radius of the circular path is 8 cm, so the area is:

A = pi r^2 = pi (0.08 m)^2 = 0.0201 m^2

Substituting this into the equation and rearranging, we get:

dB/dt = -25/(N A)

Now we can use the fact that the wire has a resistance of 4 ohms and Ohm's Law (I = V/R) to find the current (I) in the wire. We know that the voltage (V) across the wire is equal to the emf induced in the wire, which is 25 volts. Therefore:

I = V/R = 25/4 = 6.25 amps

So the current in the wire is 6.25 amps.

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The work done by the man in pushing the crate up the ramp at a constant speed is approximately 2223.32 Joules.

The work done by the man, we can use the formula:

Work = Force × Distance × cos(theta)

Given:

Mass of the man (m) = 95 kg

Distance (d) = 4.5 m

Angle of the ramp (theta) = 17°

Force (F) = 520 N

First, let's calculate the component of the force parallel to the ramp:

Force parallel to the ramp = Force × cos(theta)

Force parallel to the ramp = 520 N × cos(17°)

Now, let's calculate the work done:

Work = Force parallel to the ramp × Distance

Work = (520 N × cos(17°)) × 4.5 m

Calculating the numerical value:

Work ≈ (520 N × 0.9537) × 4.5 m

Work ≈ 2223.32 J

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Answer:

I will answer in English, and i will give some representation for each case:

We have a = 6m and b = 8m.

If they are perpendicular, we have that:

a = (6m, 0) b = (0, 8m)

The adition is:

a + b = (6m, 8m).

If they are parallel, we have;

a = (6m, 0)

b = (8m, 0)

a + b = (6m + 8m, 0) = (14m, 0 )

If they are parallel but opposite:

a = (6m, 0)

b = (-8m, 0)

a + b = (6m - 8m,0) = (-2m, 0)

Answer:

energia cinética

Explanation:

Passo um:

Dados fornecidos

Um bloco de peso igual a 10 N,

Constante de mola k = 50N / m

Passo dois:

A forma de energia formada é a energia cinética

Passo dois:

Da lei de Hooke, F = ke

e = F / k

e = 10/50

e = 0,2m

podemos resolver a energia cinética aplicando a fórmula

KE = 1 / 2ke ^ 2

KE = 0,5 * 50 * (0,2) ^ 2

KE = 0,5 * 50 * 0,04

KE = 1J

The displacement of the ball is zero.

What is displacement?

The smallest distance between the initial and final position of an object.

What are the equations of motion?

There are three equations of motion that completely describes the motion of an object.

The first equation of motion gives the relationship between the initial velocity, final velocity, acceleration, and time.

The second equation of motion gives the relationship between the initial velocity, displacement, acceleration, and time.

The third equation of motion gives the relationship between the initial velocity, final velocity, acceleration, and displacement.

Given time, initial velocity, and acceleration, the displacement can be calculated using the second equation of motion. The second equation of motion is,

s=u*t+(1/2)*a*t^2

Here, u=25 m/sec, a=-25 m/sec and t=2.0 sec.

Put the values in the formula and calculate the displacement.

s= (25)*(2.0)+(1/2)*(-25)*(2.0)^2

s=50-50

s=0 m.

Hence the displacement of the ball is zero.

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The heat rate dissipated in one fin is approximately 13.8 W, and the total heat rate dissipated by the all-finned surface is approximately 138 W.

To calculate the heat rate dissipated in one fin, we can use the formula for heat transfer through a rectangular fin:

q = (k * A * ΔT) / L

where q is the heat rate, k is the thermal conductivity, A is the cross-sectional area, ΔT is the temperature difference, and L is the length of the fin.

Substituting the given values, we have:

q = (50 W/(m·K) * 20 cm * 1 cm * (53 ºC - 25 ºC)) / 10 cm

q = 520 W

However, since there are ten fins, we divide the heat rate by ten to obtain the heat rate dissipated in one fin:

q = 520 W / 10 = 52 W

To calculate the total heat rate dissipated by the all-finned surface, we multiply the heat rate dissipated in one fin by the total number of fins:

total heat rate = 52 W * 10 = 520 W

Therefore, the heat rate dissipated in one fin is approximately 13.8 W, and the total heat rate dissipated by the all-finned surface is approximately 138 W.

It is important to note that this calculation assumes uniform heat distribution and neglects any losses due to radiation, which are typically small in comparison to convective heat transfer in such systems.

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Answer:

B. radio waves

Explanation:

Trust me It's correct

Answer:

non-native, harmful

Explanation:

The correct option is D, The net displacement of the particle between 0 seconds and 80 seconds is 20 meters.

Displacement refers to the distance and direction between an initial point and a final point of an object or particle. It is a vector quantity, meaning that it has both magnitude and direction. Displacement can be calculated by subtracting the initial position vector from the final position vector. For example, if an object moves from point A to point B, the displacement vector is the vector that goes from point A to point B.

Displacement is different from distance traveled, which is the total length of the path taken by an object between two points. Displacement takes into account the direction of motion and the final position of the object, while distance traveled does not. Displacement is often used in physics to describe the motion of objects, and is commonly measured in meters or feet.

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If a force of 20 n begins acting on the object in the opposite direction, its velocity will rise.

If there are no forces acting to accelerate or decelerate an object that is already moving with a constant speed, it will continue to move at that speed in a straight line. By defining force as a vector quantity, Newton helped to clarify the aforementioned statement.

Newton's first law of motion states that any object moving at a constant speed experiences no net external forces, so the total amount of forces acting on the object must be zero.

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Ozone in the Earth's upper atmosphere filters incoming ultraviolet radiation reaching Earth's surface. It helps to protect life on Earth from harmful UV rays.

However, it does not filter incoming infrared or visible light. The Earth's atmosphere, in general, plays a critical role in regulating the planet's temperature by trapping some of the sun's energy as radiation and preventing it from escaping into space. This phenomenon is commonly known as the greenhouse effect, and without it, the Earth would be too cold to support life.

Therefore, Ozone in the Earth's upper atmosphere primarily filters incoming ultraviolet (UV) radiation reaching Earth's surface. By doing so, it protects living organisms from the harmful effects of excessive UV exposure.

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Transformation of Energy