Help me in the question 4 plsss

Answer:

it have to be a

Explanation:

Answer: Explanation is below!

Explanation:

The sprinter's velocity and displacement both increased, since the runner is moving forward in a direction. Displacement and Velocity are both vector quantities.

Assuming that the direction in where the runner is running to is positive, we can assume that the displacement is positive ( vise versa for a negative direction)

The more displacement the runner has, the more velocity the runner will have.

Hope this helped! Have a good day ;D

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 2000 \times {10}^{2} \\ = 1000 \times 100 \\ = 100000\)

We have the final answer as

Hope this helps you

Each sphere has a final charge of -4.0 μC after separation.

When two identical conducting spheres touch and then are separated again, they distribute the total charge evenly between them. The final charge on each sphere depends on the initial charges and the ratio of their radii.

Let the initial radius of each sphere be denoted by "r", and the charges on the spheres be denoted by Q1 and Q2, where Q1 is the charge on the 4.0 μC sphere and Q2 is the charge on the -12 μC sphere. The total charge of the system is:

Q = Q1 + Q2 = 4.0 μC - 12 μC = -8.0 μC

When the spheres touch, charge flows between them until they reach the same potential. At this point, the potential of each sphere is:

V = kQ1/r = kQ2/r

After separation, the charge on each sphere can be calculated as follows:

Q1 = (V1/V)Q and Q2 = (V2/V)Q

where V1 and V2 are the potentials of the spheres after separation.

Using the equation for the potential, we have:

V1 = kQ1/r = kQ/r and V2 = kQ2/r = kQ/r

Therefore, the potential of each sphere is the same after separation.

Substituting into the equations for Q1 and Q2, we get:

Q1 = (V1/V)Q = (1/2)Q = -4.0 μC

Q2 = (V2/V)Q = (1/2)Q = -4.0 μC

Therefore, each sphere has a final charge of -4.0 μC after separation.

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Answer:

4 J

Explanation:

As I guess,

From the equation,

work done = force × distance travelled

                   =  2        ×    2

                   = 4 J

There are no conversions since all are given in the standard form.

Answer:

I need to talk to somone about my confusing love life

Explanation:

Answer:

B

Explanation:

The vehicle that undergoes the greatest change in velocity after a head-on collision is determined by the principle of conservation of momentum.

According to this principle, the total momentum of an isolated system (in this case, the two vehicles before and after the collision) remains constant.

In a perfectly inelastic collision, the two vehicles will stick together after the collision and move together with a common velocity. The change in velocity for each vehicle is equal and opposite, meaning that the vehicle that was originally moving faster will have a greater change in velocity (and thus, a greater decrease in velocity) compared to the vehicle that was originally moving slower.

In this scenario, since the Ford F250 and the Smart car are moving in opposite directions at the same velocity, their velocities will completely cancel each other out after the collision, meaning that both vehicles will undergo an equal change in velocity.

Therefore, we can say that both vehicles undergo the same change in velocity after the head-on collision.

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One example of a chemical that is frequently applied just prior to filtration is a coagulant.

Coagulants or flocculants are chemicals that are commonly used in water and wastewater treatment processes to aid in the removal of suspended particles, colloids, and other impurities from water or wastewater. These chemicals are typically added just prior to the filtration step in the treatment process.

Coagulants are substances that cause destabilization and aggregation of suspended particles and colloids in water, leading to the formation of larger particles called flocs. These flocs can be easily removed by sedimentation or filtration. Common coagulants used in water treatment include aluminum sulfate (alum), ferric chloride, and polyaluminum chloride (PAC).

Flocculants, on the other hand, are substances that promote the aggregation of smaller flocs into larger, settleable flocs. They help to speed up the sedimentation process and improve the efficiency of solid-liquid separation. Flocculants are typically used in conjunction with coagulants to enhance the overall performance of the water treatment process.

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When you display the voltage across the variable resistance R in a circuit, you indirectly observe the current flowing in the circuit.

The relationship between current (I), voltage (V), and resistance (R) is described by Ohm's Law, which states:
V = I * R
In this case, the voltage across the variable resistance 'r' gives you information about the current flowing through that resistor. By knowing the voltage (V) and resistance (R), we can calculate the current (I) using the formula:
I = V / R
So, when you display the voltage across the variable resistance 'r,' you indirectly observe the current flowing in the circuit by using Ohm's Law to relate the voltage and resistance to the current.

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Double slits with finite widthIn a double-slit Fraunhofer diffraction experiment, the "missing orders" occur when sinθ satisfies the condition for both interference maxima and diffraction minima. This leads to the condition d /a = integer.

In a double-slit Fraunhofer diffraction experiment, "missing orders" occur at those values of sinθ that simultaneously satisfy the condition for interference maxima and the condition for diffraction minima.

This leads to the condition d/a = integer, where a is the slit width and d is the distance between slits. This condition is known as Rayleigh's criterion. The condition for interference maxima is given by d sinθ = mλ, where m is an integer. Derive the approximate relation for this condition.

Using small angle approximation and applying the Taylor series, we can approximate the above expression to obtain the following relation:

d sinθ ≈ mλ or sinθ ≈ mλ / d.

The number of interference maxima under the central diffraction maximum of the double-slit diffraction pattern is given by 2d / (a-1) where a is the slit width and d is the distance between slits.

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A parallel-plate capacitor is connected to a potential source where it gains charge. if a dielectric material is placed between the plates, then the quantity that remains unchanged.

In an electric field, a capacitor is a device that stores electrical energy. It has two terminals and is a passive electrical component.

Capacitance refers to a capacitor's effect. While there is some capacitance between any two nearby electrical wires in a circuit, a capacitor is a component made to increase capacitance. The term "condenser" or "condensator" originally applied to the capacitor. Condenser microphones, sometimes known as capacitor microphones, are a remarkable exception to the general lack of usage of this name and its cognates in English.

Practical capacitors come in a wide variety of physical shapes and constructions, and there are numerous varieties that are used often.

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The SI unit of voltage (aka "electric potential difference") is equivalent to:

Joule / Coulomb

This unit is also known as a Volt (V).

The SI unit of voltage, also known as electric potential difference, is equivalent to the Joule per Coulomb (J/C). Therefore, the correct option is D) Joule / Coulomb.

Voltage is defined as the amount of electric potential energy per unit charge. The unit of energy in the International System of Units (SI) is the Joule (J), and the unit of charge is the Coulomb (C). Therefore, the unit of voltage is the Joule per Coulomb (J/C), which represents the amount of energy transferred per unit charge when an electric potential difference is present.

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The formula V = π r² h or V = π R² H is used to measure the volume of a cylinder.

The volume of a cylinder is the density of the cylinder which indicates the amount of material that can be held in it or how much amount of any material can be immersed in it. To find a cylinder's volume, the formula to be used is v = π r² h (V = π R² H). In this formula, V is the volume of the cylinder; π r² represents the area of the base of the cylinder, with radius 'r'; h is the height of the cylinder.

Therefore, the given V = π r² h or V = π R² H is the formula to calculate a cylinder's volume.

"

Correct question is as follows:

What formula is this V = Πr²h or V = π R² H?

"

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Answer:

2.38 T

Explanation:

Since the number of coils and the change in time are both 1, I set it up as 3.57=1.50(x) and then solved for x to be 2.38 T.

Answer:

C

Explanation:

Cognition is a mental process in which knowledge is gained. So, this would include anything that has to do with thinking, learning, or problem solving.

The Cognitive perspective is most strongly associated with Professor Abrams study.

Cognition:

It is a mental method of gaining knowledge. It include thinking, learning, or problem solving skills.

Here in the given example Professor Abrams is studying the problem solving skills of the third grade students.

Therefore, the Cognitive perspective is most strongly associated with Professor Abrams study.

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The minimum number of parity bits required to protect a 128-bit word using the SEC/DED code is 8.

Bits (binary digits) are the basic units of information in computing and digital communications. A bit is the smallest unit of data, and can represent two distinct states, usually represented by either 0 or 1. Bits are usually grouped together into larger units, such as bytes (8 bits), words (16 bits), and double words (32 bits). Bits are used to represent a variety of information, such as text, images, audio, and video.

The cost/performance ratio of the 8 parity bits protecting 64 bits is 8/64, while the cost/performance ratio of the 8 parity bits protecting 128 bits is 8/128. The 8 parity bits protecting 64 bits is better.Yes, there is an error. The correct value is 0x3757.

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Answer:

The total distance between A and B is 30 km

Explanation:

The given information are;

The time duration of the acceleration of the train from station A = 3 minutes = 0.05 hours

The speed attained by the train after the acceleration = 144 km/h

The time duration the train maintains the speed = 10 minutes = 0.1\(\bar 6\) hours

The time duration in which the train decelerates to station B = 2 minutes = 0.0\(\bar 3\) hours

The equation of motion required are;

The initial acceleration, a = (144 - 0)/0.05 = 2,880 km/h²

The distance covered, s = u·t + 1/2·a·t²

Where;

u The initial velocity = 0

∴ s₁ = 0 × 0.05 + 1/2 × 2880 × 0.05² = 3.6 km

s₁ = 3.6 km

The distance, s₂ the train covers at the constant speed 144 km/h for 10 minutes (1/6 hours) is given as follows;

s₂ = Velocity Time = 144 × 1/6 = 24 km

s₂ = 24 km

The deceleration, a₂ that brings the train to a stop in 2 minutes (1/30 hours) is given as follows;

a₂ = (0 - 144)/(1/30) = -4320 km/h²

The distance covered, s₃ by the train as it decelerates to rest from the initial constant speed is given as follows;

s₃ = u·t + 1/2·a·t²

Where;

u = The initial velocity =144 km/h

We have;

s₃ = 144×1/30 - 1/2 × 4320 × (1/30)² = 2.4

s₃ = 2.4 km

The total distance between A and B, s = s₁ + s₂ + s₃ = 3.6 + 24 + 2.4 = 30 km

The total distance between A and B = 30 km.

(A)The principle of wave propagation and resonance is used.(B)The equation used for the fundamental frequency of a closed tube is: f = (v/2L) × n. (C) For the lowest  frequencies (n = 1, 2, 3), we can calculate the frequencies using the formula: f₁ = (v/2L) × 1. Important that  the values of these frequencies may vary depending on the exact length and characteristics of the ear canal.

These frequencies may vary depending on the exact length and characteristics of the ear canal.

A) The physics concepts and equation being used in this question are related to standing waves in a closed tube. The equation used is the formula for the fundamental frequency of a closed tube, which is derived from the principles of wave propagation and resonance.

B) The equation used for the fundamental frequency of a closed tube is:

f = (v/2L) × n,

where f is the frequency, v is the speed of sound, L is the length of the tube, and n is the harmonic number.

C) Plugging in the numbers:

Given:

Length of the ear canal (L) = 2.7 cm = 0.027 m

Speed of sound (v) = 343 m/s

For the lowest three frequencies (n = 1, 2, 3), we can calculate the frequencies using the formula:

f₁ = (v/2L) × 1,

f₂ = (v/2L) × 2,

f₃ = (v/2L) × 3.

D) Unit check and explanation:

Let's check the units:

The units of the speed of sound (v) are m/s.

The units of the length (L) are meters (m).

The units of frequency (f) are cycles per second or Hertz (Hz).

Plugging in the numbers and evaluating the expressions, we can find the values of the lowest three frequencies:

f₁ = (343 m/s / 2 × 0.027 m) × 1,

f₂ = (343 m/s / 2 × 0.027 m) × 2,

f₃ = (343 m/s / 2 × 0.027 m) × 3.

By calculating these expressions, we will obtain the numerical values of the lowest three frequencies of the standing waves in the ear canal.

It is important to note that the values of these frequencies may vary depending on the exact length and characteristics of the ear canal.

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The acceleration of the airplane of mass 5000 kg is 0.1 m/s².

Acceleration is the rate of change of velocity.

To calculate the acceleration of the airplane, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the acceleration is 0.1 m/s².

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The persοn is mοving at a speed οf 55 miles per hοur in the Sοuth directiοn when the persοn is 50 miles West and 70 miles Sοuth οf the car, and the distance between them is increasing at a rate οf 55 miles per hοur.

Tο determine the speed at which the persοn is mοving, we can use the cοncept οf relative velοcity.

Let's cοnsider the hοrizοntal and vertical cοmpοnents separately:

Hοrizοntal Cοmpοnent:

The persοn is walking due East, which is perpendicular tο the Nοrth directiοn οf the car. Therefοre, the hοrizοntal cοmpοnent οf the persοn's velοcity dοes nοt affect the speed at which the persοn is mοving away frοm the car.

Vertical Cοmpοnent:

The persοn is 70 miles Sοuth οf the car, and the distance between them is increasing at a rate οf 55 miles per hοur. This indicates that the persοn's vertical pοsitiοn is changing with time. Since the persοn is mοving in the Sοuth directiοn and the distance is increasing, the persοn's speed can be determined by the rate οf change οf the vertical distance.

Given that the distance is increasing at a rate οf 55 miles per hοur, the persοn's speed in the Sοuth directiοn is 55 miles per hοur.

Therefοre, the persοn is mοving at a speed οf 55 miles per hοur in the Sοuth directiοn when the persοn is 50 miles West and 70 miles Sοuth οf the car, and the distance between them is increasing at a rate οf 55 miles per hοur.

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Answer:

Neptune's atmosphere is made up predominately of hydrogen and helium, with some methane. The methane is part of what gives Neptune its brilliant blue tint, as it absorbs red light and reflects bluer colors. Uranus also has methane in its atmosphere, but has a duller shading.

Explanation:

The low temperatures of these distant planets allow for the formation of methane clouds that contribute to the blue color.

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Let's look at relationship

\(\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{m}{k}}\)

\(\\ \rm\rightarrowtail T\propto \sqrt{m}\)

Hence

\(\\ \rm\rightarrowtail \dfrac{T_1}{T_2}=\sqrt{\dfrac{m1}{m2}}\)

\(\\ \rm\rightarrowtail \dfrac{1.5}{2}=\sqrt{\dfrac{0.5}{m2}}\)

\(\\ \rm\rightarrowtail 0.75^2=\dfrac{0.5}{m2}\)

\(\\ \rm\rightarrowtail m_2=\dfrac{0.5}{0.75^2}\)

\(\\ \rm\rightarrowtail m_2=0.889\)

Hence

Answer

Mass needs to added =0.889-0.500=0.389kg

Explanation:

It is much easier to balance a thing that has a large base of support and a low center of gravity. The object won't topple over as a result of little center of gravity wobble because of the wide base and low center of gravity. Therefore, balancing a nail on its base as opposed to its tip would be simpler.