Explain what the core muscles do and why it's important to have a strong set of core muscles.

a)The ball's potential energy changes as it moves from the release point to the top of the rebound.

b)The ball's potential energy is at its highest and rests when it is in the top position.

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly dependent upon the height of the object.

Potential energy = mgh

The kinetic energy of the body is due to the virtue of motion.

According to the Law of Conservation of Energy, energy can neither be created nor destroyed but can be transferred from one form to another.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

A ball dropped onto a trampoline returns to the same height after the rebound.

Hence, the ball's potential energy changes as it moves from the release point to the top of the rebound. When the ball is at the top position the potential energy is maximum and the ball is at rest.

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Fluorescent dyes can absorb ultraviolet light and then convert it to visible light of longer wavelengths. But a dye absorbs visible light and then emits ultraviolet cannot be possible.

Fluorescence can be described as the emission of light by a substance that has absorbed electromagnetic radiation. The emitted light has a longer wavelength, and therefore a lower energy of photon than the absorbed radiation.

Fluorescence occurs when the radiation from the ultraviolet region of the electromagnetic spectrum is absorbed, while the emitted light is in the visible region. The fluorescent substance has a distinct color when the substance has been exposed to UV light.

Fluorescent materials stop glowing immediately when the radiation source is removed, unlike phosphorescent materials, which continue to emit light for some time after the radiation source stops.

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Answer:
That the object is either at rest or moving with constant velocity.

Explanation:

Newton’s 1st Law of Motion tells us how an object behaves if the net force acting upon an object is equal to zero. An object at rest wants to stay at rest (or, an object in motion wants to stay in uniform motion) unless acted upon by an unbalanced force. Knowing this knowledge of Newton’s first law, if some one were to tell us that the net forces acting upon an object added to zero, we can conclude that, without seeing the object, that the object is either at rest or moving with constant velocity.

Answer:

each resistor draws 1/3 of an amp or 0.33333 amps

Explanation:

V = I * R

V = 10 volts

R = 30 ohms

10 = I * 30       Divide by 30

10/30 = I

I = 0.33333

When a wire coil is held so that its plane is perpendicular to a magnetic field, an electromotive force (emf) is induced in the coil. This phenomenon is known as electromagnetic induction and is described by Faraday's law of electromagnetic induction.

According to Faraday's law, the magnitude of the induced emf can be calculated using the equation:

emf = -N * dΦ/dt

where emf is the induced electromotive force, N is the number of turns in the coil, and dΦ/dt is the rate of change of the magnetic flux through the coil.

The direction of the induced emf follows Lenz's law, which states that the induced current will flow in a direction that opposes the change in magnetic flux.

It's important to note that the magnetic field must be changing in order to induce an emf in the coil. This can be achieved by moving the coil or changing the magnetic field strength. Additionally, the coil must be a closed circuit for the induced emf to generate a current.

If you have specific values for the number of turns in the coil, the magnetic field strength, and the rate of change of magnetic flux, I can assist you in calculating the induced emf.

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The displacement of the pendulum is 0.815 m.

Mass of the pendulum, m = 25 kg

Length of the pendulum, l = 0.75 m

Distance moved by the pendulum, x = 0.25 m

Therefore, acceleration of the pendulum,

a = -(g/l) x   the negative sign implies the restoring force.

a = -(9.8/0.75) 0.25

a = -3.26 m/s²

Time period of the pendulum = 2 s

Angular frequency, ω = 2\(\pi\)/T

ω = 2 x 3.14/2

ω = 2 s⁻¹

Displacement,

x' = -(a/ω²)

x' = 3.26/4

x' = 0.815 m

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Answer:

El delfín nada a una profundidad de 22 m

Explanation:

El principio fundamental de la hidrostática establece que la presión en un punto del interior de un fluido (presión hidrostática) es directamente proporcional a su densidad, a la profundidad que se encuentre dicho punto y a la gravedad del sitio en el que se encuentre el fluido.

Esto se expresa como:

P=ρ⋅g⋅h

donde:

En este caso:

Reemplazando:

2.22*10⁵ Pa= 1,030 \(\frac{kg}{m^{3} }\) * 9.8 \(\frac{m}{s^{2} }\) * h

Resolviendo:

\(h=\frac{2.22*10^{5} Pa}{1,030\frac{kg}{m^{3} }*9.8 \frac{m}{s^{2} }}\)

h= 21.993 m ≅ 22 m

El delfín nada a una profundidad de 22 m

Answer: nun

Explanation:

The balloon will rise the most on Wednesday due to high temperature that will increase the thermal energy of the balloon and cause it to rise higher.

The average daily temperature of the different days is calculated as follows;

Monday = (4 + 18 + 22)/3 = 14.67 ⁰C

Tuesday = (6 + 19 + 24)/3 = 16.3 ⁰C

Wednesday = (10 + 20 + 25)/3 = 18.3 ⁰C

The average daily temperature of Wednesday is the greatest.

The balloon will rise the most on Wednesday due to high temperature that will increase the thermal energy of the balloon and cause it to rise higher.

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Ideal Mechanical Advantage (IMA) can be found by using the formula:

IMA = ID/OD

ID = Input Distance

OD = Output Distance

In the question, we are given:

ID = 150

OD = 75

Now, solve the expression with what we have.

IMA = 150/75

IMA = 2

Therefore, the IMA is 2.

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AnswerThe current through a toaster connected to a 120-V source is 8.0 A. What power is given off by the toaster? p= 8.0 A : 120V (p=960 W Page 2 7. The resistance of an electric stove eleinent at operating temperature is 11 12.

Explanation:

hope this helps =)

Hello!!

For calculate the resistance of the toaster, we have to applicate formula:

\(\boxed{R= V^{2}/P}\)

\(\textbf{Being:}\)

\(\sqrt{}\) \(P = Potency \ power = 1500 \ W\)

\(\sqrt{}\) \(V = Voltage = 120 \ V\)

\(\sqrt{}\) \(R = Resistance = \ ?\)

\(\text{Then let's \textbf{replace it according} we information:}\)

\(R = (120 \ V)^{2} / 1500 \ W\)

\(R = 9.6 \ \varOmega\)

\(\textbf{Result:}\\\text{The power of the toaster is \textbf{9.6 Ohms}}\)

The density of an object remains same irrespective of its shape, size and quantity.

Explanation:

Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. Even if you cut the object into a million pieces, they would still each have the same density. It is because density in an intensive property of matter.

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To design an earthquake-resistant structure, we must take several aspects into account, such as materials and construction techniques.

An earthquake-resistant structure is a term that refers to a type of structure that has the characteristic of resisting earthquakes without being destroyed or seriously affected.

Earthquake-resistant structures were developed to prevent tragedies due to the collapse of structures during earthquakes. Generally, to make a structure earthquake resistant, materials are used that resist the movements of the earth without breaking.

The most used materials to make earthquake-resistant structures are:

Additionally, earthquake-resistant structures include specific construction techniques that allow them to arrange materials in a certain way to resist movement.

According to the above, the best option to build a 500 square foot earthquake-resistant structure is a 25-foot-wide by 20-foot-long single-story structure to make it more resistant to earth movements.

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Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

Answer:

b

Explanation:

Answer:

About 17,500 miles per hour.

On 11 November a fire started in the Ravensbourne area near Toowoomba, which burnt through over 20,000 hectares (49,000 acres) of bush across several days, destroying six houses.

the barriers if the interval are Aand B the of displacement goes up.

from B to C it just stays the same, then from C to D no Movement, and from time D to E movement, but steady

The car travels a distance of (v0²/2μg) before coming to a complete stop, and it takes a time of (v0/μg) to come to a complete stop. The first step is to determine the acceleration of the car. When the brakes are locked, the friction force is maximum.

Hence, the force acting on the car due to the friction force is given by F = μmg where μ is the coefficient of friction, m is the mass of the car, and g is the acceleration due to gravity. In this case, the friction force acts opposite to the direction of the motion of the car.

Therefore, the net force acting on the car is given by F = -μmg.

Since the net force is equal to the mass times acceleration, we get the acceleration of the car as a = -μg.Next, we need to determine the distance traveled by the car before it comes to a complete stop.

The equation for the distance traveled by the car is given by

s = v0t + (1/2)at² where s is the distance traveled, v0 is the initial velocity, t is the time taken to come to a complete stop, a is the acceleration of the car, and t is the time taken to come to a complete stop.

Finally, we need to calculate the time taken by the car to come to a complete stop. The equation for the time taken by the car is given by t = v0/a where t is the time taken to come to a complete stop, v0 is the initial velocity, and a is the acceleration of the car. Hence, the distance traveled by the car before it comes to a complete stop is given by s = v0t + (1/2)at² = v0(v0/μg) + (1/2)(-μg)t² = v0²/2μg.The equation for the time taken by the car is given by t = v0/a where t is the time taken to come to a complete stop, v0 is the initial velocity, and a is the acceleration of the car. Hence, the time taken by the car to come to a complete stop is given by t = v0/a = v0/(-μg) = -(v0/μg). Therefore, the car travels a distance of (v0²/2μg) before coming to a complete stop, and it takes a time of (v0/μg) to come to a complete stop.

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Answer:

\(\Large \boxed{\mathrm{5.67 \ seconds }}\)

Explanation:

\(\displaystyle \mathrm{acceleration \ = \ \frac{final \ velocity - initial \ velocity }{elapsed \ time}}\)

\(\displaystyle A \ = \ \frac{V_f - V_i }{t}\)

\(\displaystyle 3 \ = \ \frac{25 - 8 }{t}\)

\(\displaystyle 3 \ = \ \frac{17 }{t}\)

\(\displaystyle t \ = \ \frac{17 }{3} \approx 5.67\)

It's true that air resistance is really low. Energy must not be gained or lost during the experiment if they expect to demonstrate that energy is conserved. In other words, there must be little loss from air resistance.

Air is the source of the force known as air resistance. An object travelling through the air experiences the force in the opposite direction. A sports vehicle with a streamlined form will face less air resistance than a lorry with a flat front, enabling the latter to travel faster.

The force of air resistance changes depending on the velocity. This implies that the acceleration is not constant and neither is the force. That is a serious issue.

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Answer:

option B

Explanation:

given,

Satellite B has an orbital radius nine times that of satellite A.

R' = 9 R

now, orbital velocity of the satellite A

........(1)

now, orbital velocity of satellite B

from equation 1

hence, the correct answer is option B

Answer:

C

Explanation:

C should be the right answer

Answer:

The answer is B

Explanation:

Answer:

The  tangential velocity for the cars are approximately 2.3 m/s

Explanation:

The given parameters are;

The radius of the Texas Star Ferris wheel, r = 65.8 mete secondsrs

The time it takes the Ferris wheel to go round once = 180 seconds

The angular velocity, ω = Change in angle rotated/(Time duration of the change)

ω = Δθ/Δt = 2·π/180

The tangential velocity for the cars, \(v_t\) = ω·r = 2 × 3.14/180 × 65.8 ≈ 2.3 m/s

The  tangential velocity for the cars, \(v_t\) ≈ 2.3 m/s.

Answer:

Magnetic energy can be transformed into kinetic energy in a variety of ways.

Explanation:

One way that this occurs is through electromagnetic induction. This occurs when a changing magnetic field induces an electric current in a conductor, such as a wire. This induced current creates a force that can move the conductor, thus transforming the magnetic energy into kinetic energy. This process is used in electric generators, which convert the kinetic energy of a turbine into electrical energy by turning a coil of wire inside a magnetic field.

Another way that magnetic energy can be transformed into kinetic energy is through the operation of an electric motor. An electric motor uses the interaction between a magnetic field and an electric current to create a force that can rotate a shaft, thus transforming the electrical energy into kinetic energy. Electric motors are used in a wide range of applications, including transportation, manufacturing, and household appliances.

Magnetic energy can also be transformed into kinetic energy through magnetohydrodynamics (MHD), which involves the interaction of a fluid with a magnetic field. When a fluid such as a gas or liquid moves through a magnetic field, it can generate a force that can propel the fluid, thus transforming the magnetic energy into kinetic energy. This process is used in some forms of propulsion, including maglev trains and MHD generators.

In summary, magnetic energy can be transformed into kinetic energy through the interaction of a magnetic field with a conductor, an electric current, or a fluid, which creates a force that can move an object, thus transforming the magnetic energy into kinetic energy.

Answer:

B

Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!

Answer: You would move backward.

Explanation: You would push back because you would move in the direction of the ball's initial motion.  The ball's initial motion is to come toward you, so you would most likely move backward.

Let me know if this is right! :)

sorry i did not mean to answer