Someone help please.....
A person jogs 4.0 km in 32 minutes, then 2.0 km in 22 minutes, and finally 1.0 km in 16 minutes. What is the jogger's average speed in km per minute?​

Answer:

a

Explanation:

The resistance is the property of the resistors that helps to determine the amount of current flowing through the circuit with the given volatge source by the ohm's law,

where I is the current, V is the volatge, R is the resistance,

On the other hand, to control the flow of current in the circuit, resistor are connected. As the resistor decrease the value of current depending upon the value of resistance of the resistor.

Hence, 1st option ( Resistance, resistor) is the correct answer.

Answer:

all of the above

Explanation:

they all require speed to beat

Answer:

All of the above

Explanation:

if your taking any kind of quiz or even review and there's a choice of "all of the above" it's always right because that answer won't be on every question!

Answer:

Its not getting as hot because water and soap can act as a lubricant and it would not heat up easily because of the soapy water.

Answer:

there is less friction when your hands are soapy

Explanation:

Answer:

W=F.dcos angle

w=42.2 x8.15 x cos40

w=343.93× cos 40

W=343.93 x 0.76

W=261.38 J

Work done on the object will be 264.83 J

Work done  is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.

given :

F = 42.2 N

let , x  = 40°

horizontal distance (s) = 8.15 m

Work done = F s cos (x)

                  = F * s * cos (x)

                  = 42.2 * 8.15 * cos 40° = .766

                  =  343.93 * 0.77

                  = 264.83 J

Work done on the object will be 264.83 J

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Answer:

Rock

Explanation:

Right on edg 2021 and 2020000000:P

Explanation:

One everyday example that justifies the increase in drag force with the increase in speed is riding a bicycle. When you ride a bicycle, you can feel the resistance against your body as you increase your speed.

At low speeds, the drag force is relatively low. However, as you start pedaling faster and gain speed, you will notice an increasing resistance against your body. This resistance is caused by the drag force acting on you as you move through the air.

As you accelerate on a bicycle, the air molecules in front of you get compressed, creating an area of high pressure. Simultaneously, the air molecules behind you expand, creating an area of low pressure. This pressure difference creates a force that opposes your forward motion, known as drag force or air resistance.

At higher speeds, the drag force becomes more significant and requires more effort to overcome. This is why you need to pedal harder or lean forward to reduce your frontal area and decrease the resistance as you ride faster.

The experience of feeling increased resistance while cycling at higher speeds demonstrates the effect of drag force increasing with speed. This principle applies not only to bicycles but also to various other objects moving through a fluid medium, such as cars, airplanes, or even a person running against the wind.

I hope I helped

Answer:

increases your heart rate

Explanation:

Warming up increases your heart rate and therefore your blood flow which enables more oxygen to reach your muscles.

Answer:

1 hour

Explanation:

Given,

Speed ( s ) = 8 km/h

Distance ( d ) = 8 km

To find : Time ( t ) = ?

Formula : -

s = d / t

t = d / s

t = 8 /8

t = 1 hour

Therefore, she will take 1 hour to travel a distance of 8 km.

Pitch refers to how high or low a sound seems to a person. It is the degree of highness or lowness of a sound, which is determined by the frequency of a sound wave.

Pitch is a sound's quality that enables us to discern between a low and a high sound. It is the degree of highness or lowness of a sound and is determined by the frequency of a sound wave. A high-pitched sound is a sound that has a high frequency. A low-pitched sound, on the other hand, is a sound that has a low frequency. Sound pitch is an important aspect of music and voice tone.Pitch can be described as the rate of vibration of sound waves, measured in Hertz (Hz), with higher frequencies indicating a higher pitch. The pitch of a sound can be altered by changing the frequency of the sound wave. Pitch and volume are two of the most important qualities of sound that are utilized in music and speech to express various emotions and convey meaning.The pitch of a sound is generally increased by increasing the frequency and decreased by decreasing the frequency. The pitch of a sound can also be affected by other factors, such as the size, shape, and material of the object producing the sound. For instance, a guitar string that is tight will create a high-pitched sound, while a loose guitar string will create a low-pitched sound. Similarly, a small bell will produce a high-pitched sound, while a large bell will produce a low-pitched sound.

Pitch is the degree of highness or lowness of a sound and is determined by the frequency of a sound wave. A high-pitched sound is a sound that has a high frequency. A low-pitched sound, on the other hand, is a sound that has a low frequency. Pitch can be described as the rate of vibration of sound waves, measured in Hertz (Hz), with higher frequencies indicating a higher pitch. The pitch of a sound can be changed by adjusting the frequency of the sound wave.

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Among the given options d. Shatong​ is not a target game.

In the Filipino game of "Batuhang Bola," participants aim tiny stones or balls towards a target to get points. In the Filipino game of "Tumbang Preso," participants attempt to topple a tin can by hurling slippers or other things at it. Chinese Garter is a jumping game where participants attempt to conquer higher levels with each successful jump over a stretched garter or elastic band held by two persons.

Shatong is not a game of aim or a target. Using sticks or straws, participants attempt to flick or strike tiny shells or pebbles in order to get them to drop on a target or inside a defined area. In contrast to the other games listed above, it does not entail hitting or aiming at a particular target. Thus, it is not a target game.

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Answer:

people play basket ball on espn every year

Explanation:

i just need points

Answer:

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

Explanation:

El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante.

La distancia recorrida,  x , por un móvil que tiene un MRU con un velocidad  v  durante el intervalo de tiempo  t  es:

x= x0 + v*t

donde x0 es la posición inicial.

En este caso:

Reemplazando:

x= 22 m + 5 m/s* 30 s

Resolviendo:

x= 22 m + 150 m

x= 172 m

La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.

(a) A = B × r is a vector potential for B, where r = {x, y, 0}.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

(a) To verify that A = B × r is a vector potential for B, we need to show that ∇ × A = B.

Using the cross product property, we have ∇ × A = ∇ × (B × r). Applying the vector identity (A × B) × C = B(A · C) - C(A · B), we get ∇ × (B × r) = B(∇ · r) - r(∇ · B).

Since ∇ · r = 0 (as r = {x, y, 0}), and ∇ · B = 0 (as B has a constant magnitude in the z-direction), we find that ∇ × A = B, verifying A = B × r as the vector potential for B.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

Given that B has a constant strength b teslas in the z-direction, the flux through surface S will be Φ = ∫B·dA = ∫(0, 0, b) · (dxdy) = b∫dxdy = bA, where A is the area of the surface S.

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A projectile is launched at an angle of 33⁰ above the horizontal, then the projectile launched at an angle of 90 - 33 = 57⁰ will have the same range as the projectile launched at 33⁰. The correct option is (B) 57⁰.

In the absence of air resistance, a projectile launched at an angle of 33 above the horizontal will have the same range as a projectile launched at an angle of 57⁰.

The range of a projectile can be determined by using the range formula.

R = ((v^2 * sin(2θ))/g) Where

R is the range of the projectile,

v is the velocity of the projectile,

θ is the angle at which the projectile is launched, and

g is the acceleration due to gravity.

In the absence of air resistance,

the horizontal component of velocity of a projectile remains constant throughout the flight.

So, the range of a projectile depends only on its initial velocity and the angle at which it is launched.

If a projectile is launched at an angle θ,

the time of flight of the projectile can be calculated by using the following formula:

T = (2v * sin(θ))/g

The maximum height reached by the projectile is given by the formula:

H = (v^2 * sin^2(θ))/2gIf a projectile is launched at an angle θ, then the range of the projectile will be the same as the range of the projectile launched at an angle of (90 - θ).

So, if a projectile is launched at an angle of 33⁰ above the horizontal, then the projectile launched at an angle of 90 - 33 = 57⁰ will have the same range as the projectile launched at 33⁰.

Therefore, the correct option is (B) 57⁰.

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1.  We can calculate the maximum peak-to-peak current ripple:

ΔI = (Vin * Ton) / (2 * L)

2. We can find the power output using the formula:

Pout = 0.5 * Vin * IL

1 To calculate the maximum peak-to-peak current ripple in a converter, we can use the formula:ΔI = (Vin * Ton) / (2 * L)

Where:

ΔI is the maximum peak-to-peak current ripple

Vin is the input voltage to the converter

Ton is the on-time of the switching cycle

L is the value of the inductance

We have,

Switching frequency = 5 kHz

Inductor value = 200 μH

To calculate the on-time (Ton), we can use the formula:

Ton = 1 / (2 * switching frequency)

Substituting the given values, we have:

Ton = 1 / (2 * 5000) = 10 μs

Now we can calculate the maximum peak-to-peak current ripple:

ΔI = (Vin * Ton) / (2 * L)

However, the input voltage (Vin) is not provided in the question. Please provide the input voltage value so that we can calculate the maximum peak-to-peak current ripple.

2. To calculate the power output of the converter, we need to know the input voltage (Vin) and the current flowing through the inductor (IL). With the given information:

Switching frequency = 5 kHz

Inductor value = 200 μH

We can find the power output using the formula:

Pout = 0.5 * Vin * IL

However, the current flowing through the inductor (IL) is not provided in the question. The inductor current depends on the specific circuit configuration and the load connected to the converter. Please provide the current flowing through the inductor (IL) so that we can calculate the power output of the converter.

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Answer:

Increase height

Increase mass

Answer:

it has to be ''G''

Explanation:

.

Answer:

J

Explanation:

Sexual reproduction includes 2 parents but asexual reproduction only requires 1.

the Mach number just downstream of the shock wave can be determined once the downstream area is known.

Shock waves are intense energy waves that travel through air, water, and other media. They are created when a large amount of energy is released in a very short amount of time, such as an explosion or a sonic boom.

The Mach number just downstream of a shock wave is determined by the ratio of the upstream area to the downstream area. Since the upstream area is given as 0.07 m², the downstream area can be calculated by rearranging the equation:
A2 = A1/M²
M = sqrt(A1/A2)
M = sqrt(0.07/A2)
Therefore, the Mach number just downstream of the shock wave can be determined once the downstream area is known.

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Answer:

An electrical potential is a difference in electric potential energy.

Explanation:

Electric potential is a location-dependent quantity that expresses the amount of potential energy per unit of charge at a specified location. ... If the electric potential difference between two locations is 3 volts, then one coulomb of charge will gain 3 joules of potential energy when moved between those two locations.

The electric potential, or voltage, is the difference in potential energy per unit charge between two locations in an electric field.

1) Experiment to find the density of the wood block without using a weighing scale:

a) Fill the pyrex beaker with a known volume of water.

b) Measure and record the initial water level in the beaker.

c) Carefully lower the wood block into the water, ensuring it is fully submerged.

d) Measure and record the new water level in the beaker.

e) Calculate the volume of the wood block by subtracting the initial water level from the final water level.

f) Divide the mass of the wood block (obtained from the second experiment) by the volume calculated in step e to determine the density of the wood block.

2) Experiment to measure the density of the wood block using a weighing scale:

a) Weigh the wood block using a weighing scale and record its mass.

b) Fill the pyrex beaker with a known volume of water.

c) Measure and record the initial water level in the beaker.

d) Carefully lower the wood block into the water, ensuring it is fully submerged.

e) Measure and record the new water level in the beaker.

f) Calculate the volume of the wood block by subtracting the initial water level from the final water level.

g) Divide the mass of the wood block by the volume calculated in step f to determine the density of the wood block.

Comparing the results from both experiments will provide insights into the porosity of the wood block. If the density calculated in the first experiment is lower than in the second experiment, it suggests that the wood block is porous and some of the water has been absorbed.

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Each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

The three solutions tested to remove oil from water are scooping the oil with a spoon, absorbing the oil with a paper towel, and using soap to break up the oil. Each solution has its advantages and disadvantages. Scooping the oil with a spoon is an effective solution to remove a significant amount of oil quickly. However, it is not a practical solution for removing a large amount of oil. The disadvantage is that it spreads the oil around the surface of the water and leaves some oil in the water. Absorbing the oil with a paper towel can effectively remove a lot of oil. The advantage is that it removes some oil from the water, leaving it relatively clean. However, it also picks up a lot of water and can't get all of the oil. Using soap to break up the oil is a good solution that removes all of the oil from the water. The advantage is that it removes all of the oil from the water, leaving it clean. However, the disadvantage is that it disperses the oil on the surface of the water, making it harder to remove from the sides of the bowl. In conclusion, each solution tested has its advantages and disadvantages. The most effective solution depends on the situation and the amount of oil that needs to be removed from the water.

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Answer:

the velocity is 10.6m/s

the time taken is 1.5sec

Explanation:

height (h)=61m

from,

\( {v}^{2} = 2gh\)

v^2 = 2 (10)(61)

v^2 = 1220

v^2 = 10.6m/s

for time

\(v = \frac{1}{2} g {t}^{2} \)

v=10.6

10.6=1×10t^2/2

10.6=5t^2

10.6/5=5t^2/5

t^2=2.12

t=1.5sec

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Answer:If a linear object attached to an oscillator bobs back and forth within the water, it becomes a source of straight waves. These straight waves have alternating crests and troughs. As viewed on the sheet of paper below the tank, the crests are the dark lines stretching across the paper and the troughs are the bright lines. These waves will travel through the water until they encounter an obstacle - such as the wall of the tank or an object placed within the water. The diagram at the right depicts a series of straight waves approaching a long barrier extending at an angle across the tank of water. The direction that these wavefront (straight-line crests) are traveling through the water is represented by the blue arrow. The blue arrow is called a ray and is drawn perpendicular to the wavefront. Upon reaching the barrier placed within the water, these waves bounce off the water and head in a different direction. The diagram below shows the reflected wavefront and the reflected ray. Regardless of the angle at which the wavefront approach the barrier, one general law of reflection holds true: the waves will always reflect in such a way that the angle at which they approach the barrier equals the angle at which they reflect off the barrier.

Explanation:

Answer:

18 V

Explanation:

According to Ohm's Law, current equals voltage divided by resistance. (I=V/R)

Using this, we can rearrange the equation to have it solved for voltage.

V=IR

Then, you plug in the values for the current and the resistance.

V=(3.6)x(5.0)

V=18

The term used to describe the energy of a system that is available to do work is free energy.

Free energy is the energy that is available in a particular chemical system to do useful work.

The Gibbs free energy denoted by G is the enthalpy of a system minus the product of its entropy and absolute temperature.

It is referred to as free because the energy is readily available anytime. Free energy is measured in kilojoules per mole (KJ/mol).

Therefore, it can be said that the term used to describe the energy of a system that is available to do work is free energy.

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Answer:

stationary in an electric field.

moving perpendicular to a magnetic field.

moving perpendicular to an electric field.

Explanation:

Negative charge: In physics, the term "negative charge" is defined as a phenomenon that consists of a surplus or different electrons in any field i.e magnetic or electric field.

However, the correct answer in the question above, would be:

"stationary in an electric field".

"moving perpendicular to a magnetic field".

"moving perpendicular to an electric field".

The principle or law that states "an induced emf in a circuit loop produces a current whose magnetic field opposes further change of magnetic flux" is credited to Lenz. The correct option is b.

The principle described in the question is known as Lenz's law, named after the Russian physicist Heinrich Lenz. Lenz's law is a fundamental law in electromagnetism that relates to electromagnetic induction.

According to Lenz's law, when there is a change in magnetic flux through a circuit loop, an induced electromotive force (emf) is produced in the loop. This induced emf generates a current that creates a magnetic field that opposes the change in the magnetic flux.

In simpler terms, the induced current in a circuit loop always acts in a way that opposes the cause that produces it.

Lenz's law is based on the conservation of energy and is a consequence of Faraday's law of electromagnetic induction.

It provides a fundamental understanding of the relationship between magnetic fields, electric currents, and changes in magnetic flux, and it has important applications in various areas of electromagnetism, including the design and operation of electric generators, transformers, and other electromagnetic devices. The correct option is b.

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the principle or law that says" an induced emf in a circuit loop produces a current whose magnetic field opposes further change of magnetic flux" is credited to

a. Faraday.

b. Lenz.

c. Ampere.

d. Volta.