beth walked to the school in 80 seconds from a position 100 m west of the school. what was her velocity?

Answer:

1250 SQUARE YARDS

Explanation:

The area of the soccer field given the data from the question is 1250 yard²

Area = Length × Width

Area = Length × Width

Area = 50 × 25

Area = 1250 yard²

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The object that provides an inertial frame of reference is the skydiver falling at terminal velocity, as it is a scenario where the object moves at constant velocity with no net external force acting upon it.

An inertial frame of reference is defined as a reference frame in which an object either remains at rest or moves at a constant velocity, provided no external forces are acting upon it. Among the options given, the skydiver falling at terminal velocity provides an inertial frame of reference. Terminal velocity is a constant speed reached by an object when the drag force from the air resistance is equal to the force of gravity, causing no net force on the skydiver and thus no acceleration. The other objects are either accelerating or experiencing changing velocities which disqualify them as inertial reference frames.

Galaxy is "all-encompassing" of the other words given so it doesn't belong.

A galaxy is a collection of stars, stellar remnants, interstellar gas, dust, and dark matter that is gravitationally bound. The name comes from the Greek word galaxias, which translates to mean "milky" and refers to the Milky Way galaxy, which houses the Solar System.

Given in the question  word doesn't belong: planet, galaxy, sun, moon

So, we can see "galaxy" is "all-encompassing" of the other words given, so it does not belong.

Galaxy is "all-encompassing" of the other words given so it doesn't belong.

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Final answer:

The energy of a wavelength of light of 550 nm is 3.03 x 10^-19 Joules.

Explanation:

The energy of a wavelength of light can be calculated using the equation E = hc/λ, where E is the energy, h is Planck's constant (6.626 x 10^-34 J.s), c is the speed of light (3 x 10^8 m/s), and λ is the wavelength. In this case, the wavelength of light is 550 nm (or 550 x 10^-9 m). Plugging in these values into the equation, we get:

E = (6.626 x 10^-34 J.s) x (3 x 10^8 m/s) / (550 x 10^-9 m) = 3.03 x 10^-19 J

Therefore, the energy of a wavelength of light of 550 nm is 3.03 x 10^-19 Joules.

The momentum of the large rock that has a mass of 50kg and is rolling downhill at 3 m/s is 150kgm/s.

HOW TO CALCULATE MOMENTUM:

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The tension in ropes supporting a weight is greatest when the ropes make a large angle to the vertical. The tension increases as the angle increases from the vertical, as the tension required to maintain equilibrium and support the weight increases.

The tension in a rope supporting a weight is greatest when the ropes make a large angle to the vertical (option C). This is due to the nature of the equation for tension, which involves both the weight being supported and the angle at which the rope(s) are positioned. As the angle increases, the vertical component of the tension decreases, which means the tension in the rope must increase to maintain equilibrium. Let's look at an example: if a 10kg weight is being supported by two ropes, each at an angle of 60 degrees to the vertical, the tension in each rope will be greater than if the ropes were vertical (0 degrees) as the vertical component of the tension needs to equal the weight to remain in equilibrium.

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The Answer is Pressure hope it helps

To find the average speed of Amil's trip to the outlook, we convert the distance and time units and use the formula Average Speed = Distance / Time. The average speed of Amil's trip is 22.35 meters per second (rounded to the nearest hundredth).

To find the average speed of Amil's trip, we can use the formula:

Average Speed = Distance / Time

Amil drove 25 miles in 30 minutes to get to the outlook. To convert the distance from miles to meters, we use the conversion factor: 1 mile = 1609 meters. So, 25 miles is equal to 25 x 1609 = 40225 meters. To convert the time from minutes to seconds, we multiply 30 minutes by 60 to get 1800 seconds. Now we can calculate the average speed:

Average Speed = 40225 meters / 1800 seconds

Average Speed = 22.35 meters per second (rounded to the nearest hundredth).

To calculate the energy of X-rays with a frequency of 3.00 × 10^16 Hz, use Planck's equation to find it to be approximately 124 eV.

The energy of X-rays with a frequency of 3.00 × 10^16 Hz can be calculated using Planck's equation:

E = hf

Given h (Planck's constant) = 6.626 × 10^-34 J-s and f (frequency) = 3.00 × 10^16 Hz, you can calculate the energy:

E = (6.626 × 10^-34 J-s) × (3.00 × 10^16/s) = 1.99 × 10^-17 Joules. Convert this to electron volts by dividing by the charge of an electron:

1 eV = 1.602 × 10^-19 Joules, so:

1.99 × 10^-17 J ÷ (1.602 × 10^-19 J/eV) ≈ 124 eV

Therefore, the correct answer is B) 124 eV.

Final answer:

The momentum of an 8.8-kg bowling ball rolling at 3.0 m/s is calculated using the formula p=mv, resulting in a momentum of 26.4 kg·m/s.

Explanation:

The momentum of an object can be calculated by multiplying the object's mass by its velocity. This is expressed by the equation p = mv, where p is the momentum, m is the mass, and v is the velocity.

In the case of the 8.8-kg bowling ball rolling at 3.0 m/s, the momentum can be calculated as follows:

Momentum (p) = Mass (m) × Velocity (v)
p = 8.8 kg × 3.0 m/s
p = 26.4 kg·m/s

Therefore, the momentum of the 8.8-kg bowling ball rolling at 3.0 m/s is 26.4 kg·m/s.

The purpose of biofeedback is to help subjects "control their internal processes".

Biofeedback is a kind of treatment that utilizes sensors joined to your body to gauge key body capacities. Biofeedback is expected to enable you to take in more about how your body functions. This data may assist you with developing better power over certain body capacities and address wellbeing concerns.  

This feedback causes you center around rolling out inconspicuous improvements in your body, for example, loosening up specific muscles, to accomplish the outcomes you need, for example, decreasing agony. Generally, biofeedback enables you to utilize your musings to control your body, frequently to enhance a wellbeing condition or physical performance.

In this hydroelectric energy system, mechanical energy from the moving water turns the turbine, generating electrical energy. This electrical energy is then transformed into thermal energy, increasing the water's temperature. The water eventually becomes steam and releases more thermal energy into the atmosphere.

In this system, mechanical energy from the moving water of the faucet turns the turbine. The mechanical energy of the spinning turbine generates electrical energy which is transformed into thermal energy that causes the temperature of the water to increase. The water then becomes steam and gives off more thermal energy into the atmosphere.

Answer:

D. The net force is zero, so the acceleration is zero

Explanation:

In a simple harmonic motion, velocity and acceleration are out-of-phase as follows:

- When the displacement is zero (so, when the spring is in equilibrium position), the acceleration is zero, because the force is zero. In fact, the force is given by Hook's law:

[tex]F=-kx[/tex]

So, when x=0, F=0, and the acceleration is also zero according to Newton's second law:

[tex]a=\frac{F}{m}=0[/tex]

Instead, the velocity is maximum. In fact, the total mechanical energy (sum of kinetic and elastic potential energy) is constant, and since the elastic potential energy:

[tex]U=\frac{1}{2}kx^2[/tex]

is zero at x=0, this means that the kinetic energy is maximum. But the kinetic energy is

[tex]K=\frac{1}{2}mv^2[/tex]

and so, the velocity is also maximum.

- When the displacement is maximum, it is the opposite: the acceleration is maximum (because x is maximum, so the force is maximum), while the velocity is zero, because the elastic potential energy is maximum and so the kinetic energy is zero).

At point D, we are in the first situation (the spring is passing its position of equilibrium, so x=0), therefore the net force is zero and the acceleration is zero.

Answer:

D: The net force is zero, so the acceleration is zero

Explanation:

The final potential difference across the capacitor after delivering 40% of its stored energy to a lamp is approximately 9.49V.

The question asked is related to the energy stored in a capacitor and its link to the potential difference across it. The energy stored in a capacitor is given by the relation Uc = CV²/2, where C is the capacitance and V is the potential difference. When a capacitor delivers 40% of its stored energy to a lamp, this means a reduction in the stored energy and therefore a corresponding reduction in potential difference as well.

As the stored energy is directly proportional to the square of the potential difference, if the energy reduces to 60% (after delivering 40%), the final potential difference will be the square root of this fraction (sqrt(0.6)) times the initial potential difference. The final potential difference across the capacitor will therefore be sqrt(0.6) * 12V, which is approximately 9.49V.

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Answer:

a=0 m/s2

Explanation:

t=3,7 h=13320 s

v=const=71 km/h=19,7222 m/s ( 71*1000 m/2600 s=19,7222222 m/s)

if the speed is constant

a=Δv/Δt

since Δv= 0m/s since the speed is constant...

if the speed would rise from 0 m/s to 19.72222m/s

then a=(19.7222 m/s)/13320 s

a=0.00148 m/s2

A car travels in a straight line for 3.7 h at a constant speed of 71 km/h . what is its acceleration? answer in units of m/s 2

Electronegativity is measured on a relative, dimensionless scale known as the Pauling scale. The scale is based on the ability to attract electrons when forming covalent bonds, with fluorine set at 3.98 and other elements scaled against this value. The Pauling scale is the standard despite the abstract nature of electronegativity.

Electronegativity is measured on a relative scale called the Pauling scale. This scale was developed by Linus Pauling in the 1930s. On the Pauling scale, which is the most commonly used scale for measuring electronegativity, electronegativity is dimensionless and has no unit of measure. Fluorine, the most electronegative element, is set at a value of 3.98. All other elements are assigned values from 0 to 4.0 based on their relative ability to attract a bonding pair of electrons compared to fluorine.

The notion of electronegativity is crucial in understanding the chemical behavior of elements, particularly in the formation of covalent bonds. The higher the electronegativity value of an element, the more strongly it tends to attract bonding electrons. Fluorine's high electronegativity makes it an important reference point against which the electronegativities of other elements are measured.

Since electronegativity is an abstract property and cannot be measured directly, the Pauling scale is based on observable quantities such as the strengths of covalent bonds and molecular dipole moments. Different scales may use various methodologies, but the Pauling scale remains the standard for discussed trends in electronegativity.

Contrition refers to sincere remorse for sins out of love for God, essential for forgiveness, while compunction is a sense of guilt or regret that may not be rooted in religious belief. The distinction between contrition and less perfect sorrow (attrition) has significant implications in the context of penance and making amends.

The concepts of contrition and compunction are often discussed in religious contexts, particularly within the Christian tradition involving the practice of penance and reconciliation. Contrition refers to heartfelt remorse for sins committed out of a love for God and a desire to change one's life. It has traditionally been seen as a deep and sincere form of penitence necessary for forgiveness in the eyes of God. In contrast, compunction is a feeling of unease or anxiety caused by guilt or regret for doing wrong or harming others, which may not necessarily be motivated by love for God but could arise out of fear of punishment or a desire to avoid negative consequences.

Throughout the Middle Ages, theologians made a distinction between contrition and a less perfect form of sorrow known as attrition, which could be transformed into contrition through the sacrament of penance. Moreover, a willingness to make amends is closely tied to feelings of remorse and sympathy, and is essential for a genuine apology or act of penance, indicating a person's desire to right their wrongs and align themselves with moral and divine expectations.

Answer:

The answer would be The number of protons and neutrons

Neutrons and protons cannot be removed from nucleus from chemical reactions because they are strongly held together but nuclear reactions are strong enough to separate them

Explanation:

Nuclear reactions involve a change in the nucleus of an atom, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei

Answer: The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun. And it's not alone in dwarfing Earth's dominant star.

Explanation: