runner 1 has a step length of 1.50 m and a stride frequency of 76 strides/min. what is her running speed (m/s)?

Answer: An element with 5 electrons is more likely to either gain 3  electrons in its’ outer-most valence electron shell

Explanation: To determine whether an element with 5 electrons is more likely to gain 3 or lose 5 electrons in its outermost valence electron shell, we can use the Lewis Dot Structure.

1. Draw the symbol of the element. For example, let's consider the element with 5 electrons as X.

2. Determine the number of valence electrons for the element. Since the element has 5 electrons, it will have 5 valence electrons.

3. Represent the valence electrons as dots around the symbol of the element. In this case, we would draw 5 dots around the symbol X.

4. Analyze the electron configuration to determine the stability of the element.

- If the element gains 3 electrons, it will have a total of 8 valence electrons. This would result in a stable electron configuration, similar to the nearest noble gas. For example, if the element is in Group 15, gaining 3 electrons would give it the electron configuration of the noble gas, Neon (2, 8).

The electric field lines that are near a conductor are parallel to that conductor's surface. The "normal" direction is thought to be this one.

This relates to the preceding query since sound waves can cause an object to vibrate and emit its own sound waves when they strike a solid object, such as a conductor. Depending on the relative phase and amplitude of the waves, the interference with the original sound waves can be either constructive or destructive. Because it may have an impact on how waves interact with the conductor and produce interference patterns, the orientation of the electric field lines close to the conductor is crucial. In general, the conductor has a stronger impact on the sound waves the closer it is to the source of the sound, and the interference patterns might become more complicated as a result.

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The value of the displacement of the car is approximately 270 km, which is not equal to 192 km.

To calculate the displacement of the car, we need to find the total distance traveled by the car and subtract the initial position. In this case, the initial position is point A, so the displacement is the distance from point A to point C.

The distance traveled between A and B can be calculated using the average speed and the time taken to travel this distance:

d = v * t

t = d / v

where:

Substituting the values, we get:

d = 120 km

v = 60 km/h = 60 / 3.6 m/s = 16.67 m/s

t = d / v

t = 120 / 16.67

t = 7.2 hours

The distance traveled between B and C can be calculated in the same way:

d = 150 km

v = 50 km/h = 50 / 3.6 m/s = 13.89 m/s

t = d / v

t = 150 / 13.89

t = 10.79 hours

The total distance traveled by the car is:

d = d1 + d2

d = 120 + 150

d = 270 km

The displacement is equal to the distance from point A to point C, which is equal to the total distance traveled by the car:

|∆x| = d

|∆x| = 270 km

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The resistance is directly proportional to the temperature. Then resistance of platinum at 100°C IS 2.5 Ω. Then, the when the resistance becomes 9.61 ohms is 384°C. Then, the resistance at 45°C is 1.1 ohms.

Resistance in a material is the hindrance to electric current. The resistance through a material depends on the electric voltage, temperature and current.

The resistance is directly proportional to the temperature.

then given R1/T1 = R2/T2

Given the resistance at 100 °C is 2.5 ohms .

R2 = 9.6 ohms

then, T2 = R2 T1/R2

T2 = (9.6 ohms × 100°C)/2.5 ohms = 384°C.

Then, the resistance at 45 degree Celsius is calculated as follows;

R2 = (2.5 ohms × 45)/100°C = 1.1 ohms.

Therefore, the resistance of platinum at 45°C is 1.1 ohms.

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To determine the physical quantities and units represented by a, b, and d, we need additional information about the specific context in which the equation is being used.

The equation you provided, v = √ab + bt + d + t, is a mathematical expression that relates the velocity, v, of a particle to time, t.

However, without additional information, it is not possible to determine the physical quantities represented by the variables a, b, and d, or their corresponding units.

Typically, in physics, the variables in a equation represent specific physical quantities, and the units associated with these variables help us understand the nature of the physical system being described.

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The acceleration due to gravity of the planet will be 83.75 m/s².

The gravity of Earth is denoted by g. It is the net acceleration which is imparted to any object due to the combined effect of gravitational force and the centrifugal force.

g = GM/ R²

where, g is the acceleration due to gravity,

G is the gravitational constant = 6.7 × 10⁻¹¹ Nm²/ kg²

M is the mass of the planet, which is equal to 9.8 × 10²⁶ kg

R is the radius of the planet which is equal to 2.8 × 10⁷ m

g = GM/ R²

g = (6.7 × 10⁻¹¹× 9.8 × 10²⁶)/ (2.8 × 10⁷)²

g =  65.66 × 10¹⁵/ ​7.84 × 10¹⁴

g = 8.375× 10¹

g = 83.75 m/s²

Therefore, the acceleration due to gravity is 83.75 m/s².

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Laser irradiation of a solution is an effective way to generate crystal nucleinuclei.

Vat polymerisation employs a vat of liquid photopolymer resin in which the model is built layer by layer. Where necessary, an ultraviolet (UV) light is used to cure or harden the resin, while a platform moves the object being made downwards after each new layer is cured.

Because the process employs liquid to form objects, there is no structural support from the material during the build phase, as opposed to powder-based methods, which provide support from the unbound material. In this case, additional support structures are frequently required. Resins are cured using photopolymerisation (Gibson et al., 2010) or UV light, in which the light is directed across the surface of the resin using motorised mirrors (Grenda, 2009). The resin cures or hardens where it comes into contact with light.

The layer thickness lowers the build platform from the top of the resin vat downwards.
The resin is cured layer by layer with a UV light. The platform continues to descend, and new layers are added on top of the previous ones.
Some machines use a blade that moves between layers to provide a smooth resin base on which to build the next layer.
After completion, the resin is drained from the vat and the object is removed.

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Answer:

300 Watt

Explanation:

power=(450/3)*2

Marcus' experiment is flawed because he is not controlling for the effects of air resistance.

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If an object is dropped, it is released from rest and falls freely under the influence of gravity. The acceleration due to gravity is approximately 10 m/s^2 near the surface of the Earth. This means that the object's speed will increase by 10 m/s every second it falls.

If the same object is thrown down instead of dropped, it will initially have some initial velocity in addition to the acceleration due to gravity. The acceleration due to gravity will remain the same at approximately 10 m/s^2. However, the total acceleration of the object will be the vector sum of the acceleration due to gravity and the initial acceleration from the throw.

If the object is thrown straight down, the initial velocity will be in the same direction as the acceleration due to gravity, and the total acceleration will be the sum of the magnitudes of the two accelerations, which is 10 m/s^2 + the initial acceleration from the throw.

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Answer:

Explanation:

Wave speed = distance between two successive maxima / time for eight maxima to pass = 0.548 m / 11.4 s = 0.048 m/s

The time for a pulse of laser light to reach the Moon and bounce back to Earth is 2.57 seconds.

It takes about 2 1/2 seconds for the laser light to go from Earth, be reflected off the surface of the moon, and come back. Distance from Earth to the moon in miles is about 238,900 miles.

477,000 miles or 2 x 238,900 is the round trip from Earth to Moon.

Light travels at 186,000 miles per second.

The total time taken is 477,000 miles / 186,000 miles/sec = 2.57 seconds.

We calculated the precise distance based on the time, divided by two, and the speed of light.

Thus, the time taken by the pulse of laser light to reach the Moon and bounce back to Earth is 2.57 seconds.

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A star with an absolute magnitude of -4 is brighter than one with an absolute magnitude of 6.

No matter how far a star is from Earth, its absolute magnitude provides a measure of its inherent brilliance. A difference of 5 magnitudes corresponds to a 100-fold increase in brightness on the logarithmic magnitude scale. The result is that a star with a smaller absolute magnitude is more bright than a star with a bigger absolute magnitude. By a difference of 10 magnitudes, or a factor of 10,000 in luminosity, the star with absolute magnitude -4 is brighter than the star with absolute magnitude 6, in this instance. In other words, the star with absolute magnitude -4 is 10,000 times more brilliant than the star with absolute magnitude 6, according to this statement.

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Magnitude of the electric field at a point 1 m from the particle is 400 N/C.

The magnitude of the electric field produced by an isolated charged point particle follows an inverse-square law, meaning that the field strength decreases as the distance from the particle increases. The electric field strength E is proportional to the inverse of the square of the distance r from the particle:

[tex]E = k*1/r^2[/tex]

We can use this relationship to solve the problem. If the electric field strength at a point 2 m away from the particle is 100 N/C, then we can write:

[tex]100 N/C = kQ/2^2[/tex]

where k is the Coulomb constant and Q is the charge of the particle. Rearranging this equation to solve for Q, we get:

[tex]Q = (100 N/C)(2^2/k)[/tex]

At a point 1 m from the particle, the distance is halved, so the electric field strength will be:

[tex]E = kQ/1^2 = kQ[/tex]

Substituting the value of Q we just calculated, we get:

[tex]E = (100 N/C)(2^2/1^2k) = 400 N/C[/tex]

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Answer:

I think about 70.

Explanation:

I hope I helped

Miss case of 16 calculators, which she got for half price. Shipping was $12. Which brought the total to $100. The full price for a case is $176.

A calculation is a deliberate mathematical process that transforms one or more inputs into one or more outputs or results.

Here the price of the calculator has to be calculated

The total price including the shipping is $100

She got 16 calculators

Shipping was $12

100 - 12 = 88

Since there was half price.

88 x 2  = $176

Therefore, the full price for a case is $176.

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Correct answer is D) Protoplanet gets spherical when larger than 100 kilometers in diameter cause increasing mass and gravity heat

As a protoplanet grows, it attracts more and more particles and debris in its vicinity through gravitational forces. As these particles and debris collide and merge, they create a mass that is concentrated at the center of the protoplanet. The mass and gravity of the protoplanet increase as it grows, and this results in a higher pressure and temperature in its interior.

As the protoplanet heats up, it becomes softer and more malleable. Gravity, which is the force that pulls objects toward each other, acts to distribute the mass of the protoplanet uniformly around its center. This leads to the formation of a spherical shape. A sphere is the most stable and uniform shape in nature, and it is the most efficient shape for distributing mass evenly.

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The medicine ball starts out with a momentum of 150 kgkm/h (10 kg x 15 km/h). Because the skater is at rest, the system's starting momentum is just 150 kg/km/hr.

A medicine ball is a weighted workout ball that is used for building core strength, endurance, and power. They range in size and weight from 1 kg to 10 kg, respectively. Typically fashioned of leather, rubber, or plastic, they contain sand or a sand-and-water mixture. When performing workouts like abdominal twists, sit-ups, push-ups, lunges, and squats, people frequently use medicine balls. The additional weight makes the activity more difficult and resistant, making it a more tough workout. They are a flexible and powerful tool for enhancing conditioning, strength, and general fitness.

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When the system is at rest, there are 2 forces acting on the 9 kg block.

An object experiences a push or pull as a result of interaction with another object. A force is exerted on each object when two of them come into contact. The newton, represented by the letter N, is the SI unit of force.

There are two different types of forces: contact forces and non-forces. A few examples of forces are nuclear force, gravitational force, frictional force, magnetic force, electrostatic force, spring force, and others.

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Answer:

A change in quantity demanded refers to a variation in the amount of a good or service that consumers are willing and able to purchase, given the same price. The change in quantity demanded can be either an increase or a decrease.

Explanation:

There are several factors that can cause a change in quantity demanded:

Price change: A change in the price of a good or service can cause a change in the quantity demanded. If the price of a good or service increases, the quantity demanded will decrease (assuming everything else remains constant), and if the price decreases, the quantity demanded will increase.

Income: A change in consumer income can cause a change in the quantity demanded. If income increases, consumers may be able to afford to buy more of a good or service, which will cause the quantity demanded to increase. If income decreases, consumers may not be able to afford as much, which will cause the quantity demanded to decrease.

Tastes and preferences: Changes in tastes and preferences can also cause a change in quantity demanded. For example, if a new trend or fashion becomes popular, consumers may start to demand more of the goods or services associated with that trend.

Expectations: Consumers' expectations about future prices, availability, and income can also cause changes in the quantity demanded. For example, if consumers expect the price of a good or service to increase in the future, they may buy more of it now, which will cause the quantity demanded to increase.

Number of buyers: The number of buyers in the market can also affect the quantity demanded. An increase in the number of buyers will increase the quantity demanded, while a decrease will decrease the quantity demanded.

The value of Ka of an unknown weak acid ha, at 25°c is 0.53 x 10⁻⁸.

According to the given data,

concentration of weak acid (C) = 2.5 x 10⁻² M

[tex]P^H[/tex] = 4.94

[tex][H^+] = 10^-^P^H[/tex] = 10⁻⁴.⁹⁴

= 1.15 x 10⁻⁵ M

[tex][H^+] = \sqrt{Ka * C}[/tex]

(1.15 x 10⁻⁵ M)² = Ka x 2.5 x 10⁻² M

[tex]Ka =\frac{(1.15*10^-^5 M)^2}{2.5*10^-^2M}[/tex]

= 0.53 x 10⁻⁸

Therefore,  ka of an unknown weak acid ha, at 25°c is 0.53 x 10⁻⁸.

A weak acid is an acid that incompletely dissociates into its ions in an waterless result or water. In discrepancy, a strong acid completely dissociates into its ions in water.

The conjugate base of a weak acid is a weak base, while the conjugate acid of a weak base is a weak acid. At the same attention, weak acids have a advanced pH value than strong acids.

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Answer:

1020 meters

Explanation:

To determine the distance from a lightning strike, you can use the time elapsed between seeing the flash of lightning and hearing the thunder.

The speed of sound in air is approximately 340 m/s. So the distance from the lightning can be calculated as:

distance = (time elapsed) x (speed of sound) = 3 seconds x 340 m/s = 1020 meters.

Note: This calculation is a rough estimate and does not take into account other factors such as air temperature, atmospheric pressure, and altitude, which can affect the speed of sound.

ALLEN

The angular acceleration can be calculated using the formula α = (ωf - ωi) / t, where ωf is the final angular velocity, ωi is the initial angular velocity, and t is the time taken. Substituting the given values, the net torque on the object is found to be 8.0 N.m.

The moment of inertia of an object is a measure of its resistance to rotational motion and depends on its mass and distribution of mass. The angular velocity of an object is the rate at which it rotates around its axis and is measured in radians per second.

In this question, the moment of inertia of the object is given as 2.0 kg.m^2, and its angular velocity increases from 20 rad/s to 60 rad/s in 10 seconds. We need to find the net torque acting on the object during this time.

The net torque on the object can be calculated using the formula τ = Iα, where τ is the net torque, I is the moment of inertia, and α is the angular acceleration. The angular acceleration can be calculated using the formula α = (ωf - ωi) / t, where ωf is the final angular velocity, ωi is the initial angular velocity, and t is the time taken.

Substituting the given values,

we get α = (60 rad/s - 20 rad/s) / 10 s = 4.0 rad/s^2. Therefore, τ = Iα = 2.0 kg.m^2 x 4.0 rad/s^2 = 8.0 N.m. Hence, the net torque acting on the object is 8.0 N.m.

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The volume charge density of solid rod is 6.29 µC/m^3 if the electric field strength at the surface of the rod (not near either end) is 16 kN/C.

Given the radius of solid rod (r) = 4.5cm = 0.045m

The electric field strength of rod (E) = 16kN/C

Let the volume charge density = ρ

The volume charge density can be calculated using the formula:

Volume charge density = 2∈0E/R where ∈0 is permittivity of free space

The flux along a length l of the rod's surface can be used to represent the charge contained if the rod is long enough to approximate the field using line symmetry. The latter is calculated by multiplying the charge density (a constant) by the volume of a rod length l.

ρ = [tex]2 * (8.854 *10^{-12}) * (16 * 10^{3} ) / (0.45)[/tex] = 6.29 µC/m^3.

Hence the volume charge density of solid rod = 6.29 µC/m^3.

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complete question: A long, solid rod 4.5cm in radius carries a uniform volume charge density. If the electric field strength at the surface of the rod (not near either end) is 16kN/C, what's the volume charge density?

The work done on the box by the static friction force as the accelerating truck moves a distance D to the left is negative.

The sum of the force applied to the body and the displacement of the body in the direction of that force is the work performed. A force performs positive work when the body is moved in the direction of the force applied, whereas a force performs negative work when the body is moved in the direction that is opposed to the force.

When the body's displacement in the direction of the force is zero, no work is done.

When the body is moved in the direction of the force, frictional force will provide positive work. An illustration will help you to understand this. Imagine two blocks are piled one on top of the other. There is a frictional force between the two blocks that prevents the two blocks from sliding if the bottom block begins to move slowly in one direction. This force pushes against the top block in the direction that the lower block is moving. Along with the bottom block, the higher block also travels in the direction of the frictional force. Friction therefore produces negative work in this situation.

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Answer:

51 km/hr

Explanation:

car:  KE = 1/2mv² = 1/2(1000 kg)(15 km/hr)² = 112500

truck:  KE = 23(112500) = 2587500

KE = 1/2mv²  →   v² = 2(KE)/m  →   v = √2(KE)/m

v = √2(2587500)/(2000 kg) = 50.9 ≈ 51 km/hr

(a)  The velocity of the neutron after the collision [tex]3.00(10^3)[/tex] km/s.

(b) Different materials may have different properties that make them more or less suitable as coolants in a fast breeder reactor.

(a) In an elastic collision, momentum and kinetic energy are conserved. Let m be the mass of the neutron and M be the mass of the sodium atom. Before the collision, the momentum of the neutron is

p = mv,

where v is the velocity of the neutron.

The momentum of the sodium atom is zero because it is motionless. Therefore, the total momentum before the collision is

[tex]p_{total} = mv[/tex].

After the collision, the neutron recoils backward along exactly the same path it traveled, so its final momentum is

[tex]p_f = -mv[/tex].

By conservation of momentum, the total momentum after the collision is also

[tex]p_{total} = p_f + 0 = -mv[/tex].

Equating the total momentum before and after the collision gives:

[tex]p_{total} = mv = -mv[/tex]

Solving for the final velocity [tex]v_f[/tex] of the neutron, we get:

[tex]v_f = -v = -3.00(10^3)[/tex] km/s

Therefore, the velocity of the neutron after the collision is [tex]3.00(10^3)[/tex] km/s in the opposite direction.

(b) We follow the same procedure as in part (a), but with a lithium atom instead of a sodium atom.

Let M be the mass of the lithium atom.

Before the collision, the momentum of the neutron is

p = mv,

where v is the velocity of the neutron.

The momentum of the lithium atom is zero because it is motionless. Therefore, the total momentum before the collision is

[tex]p_{total} = mv[/tex]

After the collision, the neutron recoils backward along exactly the same path it traveled, so its final momentum is

[tex]p_f = -mv[/tex].

By conservation of momentum, the total momentum after the collision is also [tex]p_{total} = p_f + 0 = -mv[/tex].

Equating the total momentum before and after the collision gives:

[tex]p_{total} = mv = -mv[/tex]

Solving for the final velocity [tex]v_f[/tex] of the neutron, we get:

[tex]v_f = -v = -3.00(10^3)[/tex] km/s

Therefore, the velocity of the neutron after the collision is [tex]3.00(10^3)[/tex] km/s in the opposite direction.

Comparing the results of parts (a) and (b), we see that the type of metal does not affect the velocity of the neutron after an elastic collision. However, different materials may have different properties that make them more or less suitable as coolants in a fast breeder reactor.

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The charge on capacitor C2 is 3.367 microcoulombs.

To determine the charge on capacitor C2, we can use the formula for capacitance:

C = Q / V

where C is the capacitance, Q is the charge, and V is the potential difference. We can rearrange this formula to solve for the charge:

Q = C * V

We first need to calculate the equivalent capacitance of the circuit, which can be found by adding the capacitances of C1 and C3 in series, and then adding that result to C2 in parallel. The equivalent capacitance is:

1/Ceq = 1/C1 + 1/C3

1/Ceq = 1/2 µF + 1/1 µF

1/Ceq = 1.5 µF

Ceq = 2/3 µF

Now we can find the charge on C2 by using the formula:

Q = C2 * V

Substituting the known values, we get:

Q = (2/3 µF) * 5.05 V = 3.367 µC

Therefore, the charge on capacitor C2 is 3.367 microcoulombs.

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The centripetal force required for a planet to revolve in a circular motion around the sun is provided by the sun's gravitational pull on the planet. The round motion of the planet is caused by the centripetal force, which is always pointed in the direction of the sun's center at every point of its course.

The force of gravity accelerates items as they descend to the ground. Velocity is a measure of the speed and direction of motion, and acceleration is a change in velocity. The longer an object is in free fall, the faster it descends towards the ground due to gravity.

A planet needs to accelerate towards the circle's centre in order to travel in a curved route. Centripetal acceleration, which is provided by the gravitational attraction of the sun and the planet, is what causes this.

Therefore, yes, change in direction is acceleration.

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