Superman does an exhibition run at a track meet. When he runs the 200 m
dash, he accelerates at 10 m/s/s for the entire distance. Approximately
how much time will it take him to run the 200 m? *

The force on a charge Q moving with velocity v is given by the Lorentz force law, whose equation is F =QvBsinθ.

The Lorentz force equation relates the force experienced by a charged particle when it is moving in a magnetic field. The force is proportional to the charge on the particle, the strength of the magnetic field, and the velocity of the particle.

The direction of the force is perpendicular to both the velocity and the magnetic field direction and follows the right-hand rule.

The equation is given by:

F = QvBsinθ

Where F is the force on the charge. Q is the charge on the particle, v is the velocity of the particle, and B is the magnetic field strength.θ is the angle between the velocity vector and the magnetic field vector.

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Answer:

\(Vg=200mile/hr\)

\(\theta=153 \textdegree\)

Explanation:

From the question we are told that:

Plane airspeed \(v_p=190mil/h\)

Plane direction \(\angle=150 \textdegree\)

Wind current speed \(V_w=30mil/h\)

Wind direction \(\angle=150 \textdegree\)

Generally the vector form of the forces is mathematically given by

For plane

\(\angle Q_p=90-150 \textdegree\)

\(V_p=170(cos60 \textdegree ,sin60 \textdegree)\)

\(V_p=(85,-147.224)\)

For wind

\(\angle Q_w=90-170 \textdegree\)

\(V_w=30(cos-80 \textdegree ,sin-80 \textdegree)\)

\(V_w=(5.2,-29.54)\)

Generally the equation for resultant force is mathematically given by

\(v_r=V_a+V_w\)

\(v_r=(85,-147.224)+(5.2,-29.54)\)

\(v_r=(90.21,-176.76)\)

\(v_r=198.45\angle -63\)

Therefore ground speed

\(V_g=198.5miles/hr\)

\(Vg=200mile/hr\)

Direction

\(\theta=(90+63)=153 \textdegree\)

\(\theta=153 \textdegree\)

The acceleration is in the same direction and has a magnitude of 3.4 m/s2.

Acceleration is the rate of change of an object's velocity over time. It is a vector quantity, measured in meters per second squared (m/s2), and is denoted by the symbol a.

The acceleration of the body can be calculated using the equation of motion,
F = ma
where F is the net force and m is the mass of the body.
In this case, the net force is the vector sum of the two forces, Fnet = F1 + F2 = 12N + 5N = 17N.
Therefore, the acceleration of the body is given by a = Fnet/m = 17N/5kg = 3.4m/s2.
Since the body moves in the direction QA, the acceleration is in the same direction and has a magnitude of 3.4 m/s2.

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The correct answer is M phase.

During the cell cycle, the nucleus divides during the M phase, specifically in the process known as mitosis. The M phase consists of two main stages: mitosis and cytokinesis. Mitosis is the phase in which the nucleus divides, while cytokinesis is the phase in which the cytoplasm divides to form two daughter cells.

The other phases mentioned in the options are as follows:

G2 phase: This is the phase that occurs after DNA replication during the interphase. It is a preparation phase before mitosis.

G1 phase: This is the first gap phase of the cell cycle, which occurs before DNA replication during the interphase.

S phase: This is the synthesis phase of the cell cycle, during which DNA replication takes place.

Therefore, The correct answer is M phase.

Not including the endpoints, there are 3 nodes.

In a wave, a node is a stationary point. For example in a vibrating string of a guitar, the endpoints would be nodes.

But here we need to ignore the endpoints, we only know that the wave has two wavelengths.

For a wave with N wavelengths the number of nodes that are not endpoints is just given by 2*N - 1  (while if we counted the endpoints we would have 2*N + 1).

So in this case we have N = 2, then there are 2*2 - 1 = 3 nodes.

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After slowing down by 15 miles per hour and reducing the speed by one third, you are now going at 60 miles per hour.

If you are initially driving at a rate of one and a half miles per minute, it means you are traveling at a speed of 90 miles per hour (since there are 60 minutes in an hour).

In the second step, you slow down by 15 miles per hour. This reduces your speed to 75 miles per hour.

Finally, you reduce your speed by one third, which means you need to subtract one third of 75 from 75. One third of 75 is 25, so subtracting 25 from 75 gives you a speed of 50 miles per hour.

Therefore, after slowing down by 15 miles per hour and then reducing your speed by one third, you are now traveling at a speed of 50 miles per hour.

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Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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It will take the bug a time of 3.5 seconds to travel 7 meters across a floor at a speed of 2 m / s

v = d / t

v = Velocity

d = Distance

t = Time

v = 2 m / s

d = 7 m

t = d / v

t = 7 / 2

t = 3.5 s

Velocity is the rate of change of distance at a given amount of time. It is denoted by v.

Therefore, it will take the bug 3.5 seconds

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Based on the Latent heat of vaporization of iron, the choice that calculates the amount of energy needed to change the state of iron during intervals D-E is 6272.0 KJ.

The amount of heat needed to transform a unit mass of a substance from a liquid to a gas at that solid's boiling point is known as the latent heat of vaporization.

The following is the formula to determine a substance's latent heat of vaporization:

L = q/m, the latent heat of vaporization where;

Δq is the heat change \sm is the mass of the liquid

The interval D to E is vaporization

Heat required = 349.6 kJ/mol * 112 g / 56g/mol

Heat required = 699.2 kJ

Therefore, Based on the Latent heat of vaporization of iron, the choice that calculates the amount of energy needed to change the state of iron during intervals D-E is 6272.0 KJ.

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Answer:

yes

Explanation:yes

Answer:

Yes

Explanation:

Earth is accelerated around the sun

Answer:

Distance-0

Displacement-0

Explanation:

She spun in place and fell in her exact placement she didnt move and distance or displace any area

Mali loves to make herself dizzy, so she spins in place 7 times at a particular place, then the distance and displacement will be equal to zero.

The complete movement of an object, regardless of direction, is referred to as a distance. The amount of ground a thing travels from its starting point to its destination is also referred to as distance. A distance can alternatively be thought of as a scalar quantity, meaning that it is independent of an object's motion's direction.

The term "displacement" simply describes how an object's location has changed. For instance, when an object travels from point A to point B, displacement has taken place. A vector quantity with both magnitude and direction is displacement.

Hence, distance and displacement covered by Mali will be zero.

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the CT ratio and select the time overcurrent curve (TOC) for protective devices, one needs to follow the steps given below. Then, the phase element relay settings can be calculated for the relay (B3) and the reclosers (R1 and R2).

Determine the CT ratioDetermine the nominal primary current (In) of the transformer. Then, by dividing the maximum primary fault current (Ifmax) by the nominal primary current (In), calculate the CT ratio.CT ratio = Ifmax / InStep 2: Select the time overcurrent curve (TOC)The curve is selected based on the transformer's full load current. A 51/50N instantaneous overcurrent element,

as well as a 51 time overcurrent element, can be used in conjunction with the TOC. The choice of curve is primarily dependent on the maximum transformer full load current (If) and the curve selection must be consistent with other protective device curve selections in the system.Step 3: Calculate the phase element relay settingsThe following formulas can be used to calculate the phase element relay settings:Minimum pickup current (Iphmin) = (Isd × CT ratio × Correction factor) / Number of elementsPickup current (Iph) = (Isd × CT ratio × Correction factor) / Number of elementsTime dial setting (TDS) = TMS × (Iph / Iphmin)Where: Iph = pickup currentIsd = primary fault currentCT ratio = CT transformation ratioCorrection factor = CT correction factorNumber of elements = the number of elements in the CTIphmin = minimum pickup currentTMS = relay time multiplier settingTDS = time dial settingNote: It is important to note that CT's correction factors must be incorporated into relay settings to ensure that the CT's measurement error is accounted for.

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Blogs would typically be found within the "Written" or "Online" category of a communication matrix.

A communication matrix is a tool used to classify and categorize different modes or channels of communication based on their characteristics. It helps identify the most appropriate communication method for specific purposes or contexts.

While communication matrices can vary in their specific categories and classifications, blogs are commonly considered a written form of communication that is typically published and shared online.

Therefore, they would typically be included in the written or online category of a communication matrix alongside other written mediums such as emails, reports, articles, and other digital content.

Hence, Blogs would typically be found within the "Written" or "Online" category of a communication matrix.

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Condensation, freezing, solidification are same process while crystallization is different from condensation, freezing and solidification.

A. Condensation - It is the process of conversion of water vapours or gas to liquid. For example conversion of steam into water. Condensation occurs at 100 degree celcius.

B. Freezing - It is the phase when liquid gets converted into solid. For example conversion of water into ice. It starts at 0 degree celcius for water.

C. Crystallization - It is the process of forming Crystals. For example evaporation of salt water.

D. Solidification - The process of conversion of liquid into solid. For example formation of snow and solidification of melted candle wax.

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Condensation, freezing and solidification are  same process of phase transformation whereas Crystallization is different from others.

The physical process of changing a medium's state from one to another is known as a phase transition (or phase change) in the domains of chemistry, thermodynamics, and other related sciences. The phrase is frequently used to describe transitions between the three fundamental states of matter—solid, liquid, and gas—and, in rare instances, plasma.

The physical characteristics of a phase of a thermodynamic system and the states of matter are constant. Certain properties of a given medium change during a phase transition as a result of a change in the environment, such as temperature or pressure. This change can be discontinuous. The phase transition point is identified by the external circumstances in which a change takes place.

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Work is required to accelerate it from rest to a rotation rate of 1.00 revolution per 7.00s is 12,640 Joules

The following equation is used to calculate the net work necessary to accelerate a merry-go-round from resting to a rotational speeds with one rotation every 7.00 secs:

Work is calculated as (mass x radius x angular acceleration) / 2.

In which: 1440 kg in mass

R = 7.50 meters

Angle acceleration is equal to 2/7.00s times 0.89 rad/s2.

Hence, this mathematical methodology is used to compute the net work needed:

Work is equal to (1440 kg x 7.50m2 x 0.89 rad/s2) / (2 x 7.50m x 1440 kg x 1 revolution/7.00s) / 2 = 5,524,000 J or 5.52 MJ.

Acceleration was its term for the variation in velocity. Generally speaking, and sometimes not, acceleration denotes a shift in speed. Regardless of whether an object is moving in a circle, its velocity route is still changing, therefore it keeps gaining speed.

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Answer:

\(W=7.56\times 10^{-19}\ J\)

Explanation:

Given that,

The work function for silver is 4.73 eV.

We need to find the value of the work function from electron volts to joules.

We know that,

\(1\ eV=1.6\times 10^{-19}\ J\)

For 4.73 eV,

\(4.73\ eV=1.6\times 10^{-19}\times 4.73\\\\=7.56\times 10^{-19}\ J\)

So, the work function for silver is \(7.56\times 10^{-19}\ J\).

The particle temperature and the valency of the atom in the particles are the two parameters that decrease with the kinetic energy of the particles in an item.

Temperature directs to the hotness or coldness of a body. In clear terms, it is the method of finding the kinetic energy of particles within an entity. Faster the motion of particles more the temperature.

Because an item possesses kinetic energy when it is moving, anything that prevents that motion will reduce the kinetic energy of the object.

A valence electron is an electron in the outermost shell associated with an atom that can experience the innovation of a chemical bond if the outer shell is not closed. Both atoms contribute one valence electron to create a shared pair.

More the valence electron more the motion of atoms results in more kinetic energy,

Hence the two factors decrease as the kinetic energy of the particles in an object will be the particle temperature and the valency of the atom in the particles.

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Answer:

a) The initial momentum of the ball is 22.5 kg·m/s

b) The magnitude of the momentum imparted by the ball is 30 kg·m/s

Explanation:

The question is based on change in momentum

The mass of the ball, m = 0.75 kg

The velocity with which the ball is thrown against the wall, u = 30 m/s

The time duration it takes while the ball is in contact with the wall, Δt = 0.05 sec

The velocity of the ball as it bounce back, v = -10 m/s (The ball moves in the opposite direction)

a) The initial momentum of the ball, \(P_{Initial}\) = m × u = 0.75 kg × 30 m/s = 22.5 kg·m/s

b) The final momentum of the ball, \(P_{Final}\) = m × v = 0.75 kg × (-10 m/s) = -7.5 kg·m/s

The momentum imparted by the ball, ΔP = The final momentum - The initial momentum

∴ ΔP = \(P_{Final}\) - \(P_{Initial}\)  =  -7.5 kg·m/s - 22.5 kg·m/s = -30 kg·m/s

The magnitude of the momentum imparted by the ball, \(\left | \Delta P \right |\) = 30 kg·m/s

Answer: Height

Explanation:

You could raise it further off the ground.

Cantilever beam capacitance at time t, expressed as C= U's rate of change is therefore inversely proportional to x 2.

Date Updated: 27 June 2022. (00 : 00) Solution: A capacitor's capacitance is determined by dividing the amount of charge on either of its conductor plates by the potential difference between its conductors.

QpropV or C=(Q)/(V). The coulomb per volt and farad is the SI unit for capacitance (F).

The fundamental equation for capacitors is charge (= capacitance x voltage, or Q = C x V. We gauge capacitance by series or in parallel, which is the capacity that holds one coulomb (specified as the charge delivered by one ampere inside one minute) of charge per one farad.

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The multimeter is probably broken and you should give it to your instructor/TA is used to measure the electric potential difference, but the value stays at 0.00 v no matter what you do and there is an h on the screen.

What is a multimeter?

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3. You attempt to use your multimeter to measure the electric potential difference, but the value stays at 0.00 V no matter what you do and there is an H on the screen. What's going on?

The dot product of a⃗ and b⃗ is 12.0.

The dot product of two vectors a⃗ and b⃗ is given by the formula: a⃗ ⋅ b⃗ = aixbi + ajxbj + akxbk, where ai, aj, ak are the components of vector a⃗ , and bi, bj, bk are the components of vector b⃗ .

In this case, we have:

a⃗ = 2.0i^ − 4.0j^ + 5.0k^
b⃗ = 11.0i^ + 2.5j^

So, the dot product of a⃗ and b⃗ is:

a⃗ ⋅ b⃗ = (2.0)(11.0) + (−4.0)(2.5) + (5.0)(0) = 22.0 − 10.0 + 0 = 12.0

Therefore, the dot product of a⃗ and b⃗ is 12.0.

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Answer:

The variable that impacts kinetic energy is velocity, not mass.

The kinetic energy of an object is given by the formula KE = (1/2)mv^2, where m is the mass of the object and v is its velocity. From the given information, we can calculate the kinetic energy of each object as follows:

Object 1: KE = (1/2) x 2 kg x (2 m/s)^2 = 4 J

Object 2: KE = (1/2) x 4 kg x (3 m/s)^2 = 18 J

Comparing the two objects, we can see that the kinetic energy of the second object is greater than that of the first, even though its mass is greater. This is because the second object is being lifted at a faster rate (i.e., greater velocity) than the first object. Therefore, the variable that impacts kinetic energy in this scenario is velocity, not mass.

Explanation:

.

Explanation:

To blow up a balloon, start by pinching the neck of the balloon with your index finger and thumb. Then, take a deep breath and put the opening of the balloon in between your lips. When you're ready, loosen your grip on the neck and blow into the balloon opening so the balloon starts to fill with air.May

Answer:

A. 131.9 s

B. 0.13 m/s

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 490 Kg

Height (h) = 17 m

Power (P) = 0.83 hp

Time (t) =?

Velocity (v) =.?

Next, we shall convert 0.83 hp to Watts. This can be obtained as follow:

1 hp = 745.7 Watts

Therefore,

0.83 hp = 0.83 hp × 745.7 Watts / 1 hp

0.83 hp = 618.931 Watts

Thus, 0.83 hp is equivalent to 618.931 Watts.

A. Determination of the time.

Mass (m) = 490 Kg

Height (h) = 17 m

Power (P) = 618.931 Watts

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

Power = Energy / time

P = mgh / t

618.931 = 490 × 9.8 × 17 / t

618.931 = 81634 / t

Cross multiply

618.931 × t = 81634

Divide both side by 618.931

t = 81634 / 618.931

t = 131.9 s

Therefore, it will take 131.9 s to lift the beam.

B. Determination of the constant velocity.

We'll begin by calculating the force. This can be obtained as follow:

Mass (m) = 490 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Force (F) =?

Force = mass × acceleration

Force = 490 × 9.8

Force = 4802 N

Finally, we shall determine the constant velocity as follow:

Force (F) = 4802 N

Power (P) = 618.931 Watts

Velocity (v) =?

P = F × v

618.931 = 4802 × v

Divide both side by 4802

v = 618.931 / 4802

v = 0.13 m/s

Thus, the constant speed at which the beam moves upward is 0.13 m/s

Answer:

Earth's magnetic field aligns the magnet in the compass with its north pole. A second method is to observe the night sky in the polar regions. Northern and Southern Lights are produced by the interaction of the Earth's magnetic field with solar radiation.

Hope this helps!!!

Answer:

i think its b

Explanation:

its been awhile since I've worked on Newton's first law