Two objects, A and B, are pushed across the floor. Object B experiences a greater applied force. Which statement best describes what must be true for Object A to have a greater value of work? (2 points) Group of answer choices Objects A and B are pushed the same distance. Object B is pushed a much smaller distance. Object A is pushed a much smaller distance. Equal forces are applied to Objects A and B.

A) The current in the solenoid is 0.22 A. B) If the solenoid were doubled, the current would remain the same.

A) The magnetic flux through the solenoid is given by Φ = μ₀n²πr²I, where μ₀ is the permeability of free space, n is the number of turns per unit length, r is the radius of the solenoid, and I is the current.

Solving for I, we get I = Φ/(μ₀n²πr²)

= (1.27x10⁻⁴ Tm²)/(4πx10⁻⁷ TmA⁻¹x372²/m²x(0.179/2)²m²)

= 0.22 A.

B) Doubling the solenoid would double the number of turns per unit length (n) and the radius (r), but the magnetic flux would remain the same.

Therefore, using the same equation as before, we see that the current would remain unchanged, since the increase in n and r would cancel each other out.

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The mass of the aeroplane is 300,000 kg.

It states that the force F is directly proportional to the acceleration a of the body and its mass.

The law is represented as

F =ma

where acceleration a = velocity change v / time interval t

Given is the aeroplane lands at a speed of 80 m/s. After landing, the aeroplane takes 28 s to decelerate to a speed of 10 m/s. The mean resultant force on the aeroplane as it decelerates is 750 000 N.

The force expression will be

F = mv/t

Substitute the values and we have

750000 = m x  (80 -10)/ 28

750,000 = m x 2.5

m = 300,000 kg

Thus, the mass of the aeroplane is 300,000 kg.

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220-dc motor powered by a 5.3 ohm armature whose resistance is running at its operating speed the series resistance would be necessary to keep the initial current under 20 A

Distance travelled in a unit of time is referred to as speed. It is the rate of movement of an object. Speed is a scalar quantity and the velocity vector's magnitude. There is no clear direction to it. An object is travelling more quickly if its speed is higher. Slower motion is indicated by a lower speed. In simple words, we define speed or velocity as the distance travelled in a specific amount of time. If an automobile is driving faster if its speed is higher. A slow vehicle has less speed, as we say. if an object moves quickly.

Req = R + r = 2 + r

Req = V/I2 + 2 + r = 220/30 60 + 30 r = 220 30 r = 160 r = 5.3 ohm

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Answer:

Evolution, Big Bang Theory and Cell theory.

Explanation:

These theories interest me because they talk about life and how life started.

Answer: 180 m south

Explanation:

The displacement of the horse in this time is 180 m south. The correct option is A.

The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.

Velocity is the time rate of change of displacement with time.

Given is a horse runs for 15 seconds to the south at a speed of 12 m/s. So, the displacement is

Displacement = Speed x Time

Put the values, we get

Displacement = 12 m/s x 15s

                      = 180 m

Thus, the displacement of the horse in this time is 180 m south.

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The velocity of the ball after 0.55 seconds is 4.025 m/s upward.

To find the velocity of the ball after 0.55 seconds, we can use the formula:
v = u + at
where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.
In this case, u = 9.5 m/s (upward), a = -9.8 m/s^2 (downward acceleration due to gravity), and t = 0.55 s.
Plugging in the values, we get:
v = 9.5 m/s - 9.8 m/s^2 * 0.55 s
v = 4.025 m/s (upward)
So, the velocity of the ball after 0.55 seconds is 4.025 m/s upward.
It's worth noting that we assumed negligible air resistance in this problem. If air resistance were significant, it would affect the velocity of the ball and the time it takes to reach its maximum height. Air resistance is a form of resistance that opposes the motion of an object through the air. It depends on factors such as the size and shape of the object, as well as the density and viscosity of the air.

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Answer:

Explanation:

so her displacement is the distance from the start... she's now at a point (6,5) away from the start..  so what's the length of the side of the right triangle made by one side of 6 and the other of 5

Yes.. use Pythagoras theorem to solve this

C =  √(\(6^{2}\)+\(5^{2}\))

C = √(36 + 25)

C = √61

C = 7.810  miles.. north east of where she started

C = 7.8 miles NE   :P

A burn from 100°C steam is more severe than a burn from 100°C water because steam has a higher latent heat of vaporization, transfers heat more effectively, and covers a larger surface area when in contact with your skin.

Why a burn on your arm from 100°C steam is more severe than a burn from 100°C water is due to the difference in their heat transfer mechanisms. Steam carries a higher amount of thermal energy or heat compared to water due to its gaseous state. When steam comes into contact with the skin, it condenses and releases its heat, causing a severe burn that can damage deep tissue layers.

On the other hand, water has a lower heat transfer capability compared to steam. It tends to stay on the surface of the skin, and its heat dissipates quickly. Therefore, a burn from 100°C water may only affect the top layer of the skin or the epidermis, while steam burns can penetrate deep into the skin's tissues, causing severe pain, inflammation, and scarring.

Moreover, the physical properties of steam and water also contribute to their differences in burn severity. Steam has a lower density than water, which means it can penetrate the skin more quickly. Additionally, steam can adhere to the skin's surface for a more extended period, further increasing the severity of the burn. Overall, the severity of a burn depends on the nature of the heat transfer mechanism, the physical properties of the substance, and the duration of contact with the skin.

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Answer:

r = 0.2499 m

Explanation:

Use Coulomb's Law: \(F_{e} = kq_{1}q_{2} / r^{2}\) where Fe is the electric force, q1 and q2 are the 2 charges respectively, k is a constant (8.99*10^9 N • m^2 / C^2) and r is the distance.

\(3.6 N = (8.99*10^{9})(5*10^{-6})(5*10^{-6}) / r^{2}\)

r = 0.2499 m

The distance that should be apart from these charges should be considered when the r = 0.2499 m.

Since

Two charges of 5 x 10-6 C are a certain distance apart. These two positive charges experience 3.6 N of repelling electrical force between them

So

here we use Columb law

Electric force = k * two charges * two charges)r^2

3.6 N = (8.99*10^9) * ( 5 * 10^-6) * (5*10^-6)r^2

r = 0.2499 m.

Hence, The distance that should be apart from these charges should be considered when the r = 0.2499 m.

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Friction frequently has no immediate relevance. Perpendicular interactions are collisions. One parallel force is friction.

Consider a billiard ball colliding with another ball on a pool table. Although the billiard ball may enter at an angle, the momentum transfer occurs perpendicular to the contact plane.

The internal force (of the collision) is often larger than the exterior force (friction) on a system when there is a collision within that system.

Two objects meet in an elastic collision when no kinetic energy is wasted. The kinetic momentum and energy of the objects are preserved when they bounce back from one another. We are dealing with an impactor because inelastic collisions are thought to happen when the two items stay together after the impact.

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The nylon rope stretches by 0.637 meters, or 63.7 centimeters when the mountain climber hangs 35.0 meters below the rock outcropping.

F = m * g

F = 65.0 kg * 9.81 m/s²

F = 637.65 N

The cross-sectional area of the rope can be calculated as:

A = πr²

A = π(0.800 cm/2)²

A = 0.5027 cm² = 5.027 ×\(10^{-5\)m²

Now we can use Young's modulus to calculate the stretch of the rope:

Y = stress/strain

stress = F/A

strain = ΔL/L0

where ΔL is the change in the length of the rope, and L0 is the original length.

Assuming Young's modulus for nylon is 2.0 GPa or 2.0 ×\(10^{9}\) N/m², we can solve for the stretch:

ΔL/L0 = stress/Y = (F/A)/(Y)

ΔL/L0 = (637.65 N)/(5.027 × \(10^-5\)m² * 2.0 ×\(10^{9}\)N/m²)

ΔL/L0 = 0.637 m

Cross-sectional area refers to the area of a two-dimensional shape that is perpendicular to an axis or direction of interest. For example, if a cylinder is standing upright, its cross-sectional area would be the circle formed by the intersection of the cylinder and a plane perpendicular to its height.

The cross-sectional area is important in a variety of physical contexts, including fluid mechanics, electrical engineering, and materials science. In fluid mechanics, the cross-sectional area of a pipe or channel is used to calculate flow rate and velocity. In electrical engineering, the cross-sectional area is used to determine the current-carrying capacity of a wire or cable. In materials science, the cross-sectional area is used to calculate stress and strain in materials subjected to external forces.

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If a liquid doesn't absorb visible light, the liquid would appear dark or opaque to us.

The absorption of light, especially visible light, makes an object dark or opaque. To some wavelengths of light, some materials are opaque, but some are transparent to others. Glass, for instance, is opaque to ultraviolet light, but it is transparent to visible light.

Since the liquid does not absorb visible light, to human eyes the liquid would appear dark or opaque. This is because human eyes are only sensitive to visible light. If the dark/opaque liquid actually reflects other lights, we wouldn't know (without the help of technology) since we don't see them.

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Answer:Let m =  mass of asteroid y.Because asteroid y has three times the mass of asteroid z, the mass of asteroid z is m/3.Given:F = 6.2x10⁸ Nd = 2100 km = 2.1x10⁶ mNote thatG = 6.67408x10⁻¹¹ m³/(kg-s²)The gravitational force between the asteroids isF = (G*m*(m/3))/d² = (Gm²)/(3d²)orm² = (3Fd²)/G     = [(3*(6.2x10⁸ N)*(2.1x10⁶ m)²]/(6.67408x10⁻¹¹ m³/(kg-s²))    = 1.229x10³² kg²m = 1.1086x10¹⁶ kg = 1.1x10¹⁶ kg (approx)Answer: 1.1x10¹⁶ kg

Explanation:

Seeing the fur rubbed with the rod attracts neutral paper, this happens because the friction of the rod with the rubbed can produce a static electric force. It is this static electric force that causes the pieces of paper to be attracted and rod up.

If the rod or ruler has been rubbed into the hair, then brought closer to the paper, then the paper will lift and stick. Indeed, this can happen due to the presence of an electric charge. When you rub a plastic ruler over your hair, it becomes electrically charged, causing the paper to pull and stick.

The electric charge consists of two types of charge, namely negative charge, and positive charge. However, some objects have an equal amount of negative charge and positive charge. Objects that have the same amount of positive and negative charges are called neutral objects. Initially, a plastic ruler is also an electrically neutral object.

When you rub the ruler against dry hair, it gets an electric charge, because of that electric charge the plastic ruler can exert a force on the paper and pull it closer.

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Fahrenheit to Kelvin conversion formula: (°F - 32) * 5/9 + 273.15.

To convert from Fahrenheit to Kelvin, remove 32 from the Fahrenheit temperature, multiply the result by 5/9, and then add 273.15. This yields the temperature in Kelvin, which is the scientific community's absolute temperature scale.

It is vital to emphasise that 0 Kelvin is absolute zero, or the temperature at which all matter has no thermal energy. Thus, in scientific studies, Kelvin is employed to measure temperature, but Fahrenheit is frequently utilised in the United States. It is critical to be precise when converting temperatures from Fahrenheit to Kelvin in order to precisely measure temperature.

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The rotational kinetic energy for (a) the smaller cylinder (radius 0.25m) is 458.59 J, and for (b) the larger cylinder (radius 0.75m) is 1,375.78 J.


To calculate the rotational kinetic energy (K) of each cylinder, use the formula K = 0.5 * I * ω^2, where I is the moment of inertia and ω is the angular velocity.
Step 1: Calculate the moment of inertia (I) for each cylinder using I = 0.5 * m * r^2, where m is the mass and r is the radius.
I(a) = 0.5 * 1.25 kg * (0.25 m)^2
I(b) = 0.5 * 1.25 kg * (0.75 m)^2
Step 2: Calculate the rotational kinetic energy (K) for each cylinder using K = 0.5 * I * ω^2.
K(a) = 0.5 * I(a) * (235 rad/s)^2
K(b) = 0.5 * I(b) * (235 rad/s)^2

After calculating, K(a) is found to be 458.59 J, and K(b) is 1,375.78 J.

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Answer:

Educational institutions can influence what psychological perspectives are taught, studied, and researched. Take, for example, behaviorism. Before the cognitive perspective re-emerged, behaviorism was the dominant perspective being taught in most universities. Personal ideology can also affect which perspective a psychologist supports, the course of research a psychologist undertakes, and also a psychologist's perception and interpretation of research findings. For example, during the dominance of behaviorism, psychologists were discouraged from studying cognitive processes. As a result, much of the research conducted had a behaviorist slant to it.

Explanation:

The new  time period of the system is 8.77 sec. If she stands up.

calculation

T = 2π√(L/g)

l = g*(8.85/2π)^2

new length = l -0.35= 8.85-0.35

T = 8.77 sec

Term (T) is the amount of time an oscillating body takes to repeat itself, and Frequency (f or ν) is the variety of instances it repeats in one 2d or unit time. in case you degree time in s (seconds) then frequency is measured in Hz (cycles or durations in keeping with second.

center of mass:

The centroid of a mass distribution in space is the unique point where the weighted relative positions of the distribution masses sum to zero. This is the point where force can be applied to produce linear acceleration without angular acceleration.

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If the current through an ideal inductor is constant with time, then the value of the voltage across the inductor is zero.

If the current through an ideal inductor is constant with time, the value of the voltage across the inductor is zero. This is because the voltage across an inductor (V) is related to the rate of change of current (di/dt) through the inductor and its inductance (L) by the formula:
V = L * (di/dt)
Since the current is constant with time (di/dt = 0), the voltage across the ideal inductor will be:
V = L * 0
V = 0
So, the voltage across the ideal inductor is zero when the current is constant with time.

This is because an ideal inductor does not have any resistance, and therefore does not dissipate any energy as heat. As a result, the voltage across the inductor must be zero, since there is no energy being dissipated or lost.

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Answer: yes

Explanation: I did this question before

Answer:

Yes

Explanation:

I got it right on the test.

Answer:

Part 1: Matter can neither be created nor destroyed thus the product is always equal to the mass of reactants

Part 2: Conversation of Mass

Explanation:

:D

A renewable resource, also known as a flow resource, is a resource that gets replenished naturally to replace the portion depleted by usage and consumption.

Examples: solar energy, tidal energy, wind energy, hydro power, bio-energy etc.

A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace equal to keep up with consumption rate.

Examples: fossil fuels, natural gas, nuclear energy, natural gas etc

Answer:

hmm let's see

Explanation:

ok, ill use the second equation of motion, u see its quite simple

recall that

average velocity= u+v/2

now think of that v like a box you can can call it velocity lol obviously its velocity

now remember the first equation of motion which is

v=u+at now this is inside the box, now you have to replace the v with it

then it becomes u+u+at/2

now u notice there are two initial velocity u know what to do with that

now it becomes

2u + at/2 now since the numerator applies to both then you can simplify it like this

2u/2+at/2

all the same the pont im trying to make is that you can use imaginative ways to mater derivation you can also reverse it if you don't unferstand you can drop your number

Psychology is important in crimes as it helps in understanding the behavior and thinking of criminals which help in reducing crime in the society.

Forensic psychology is the development and application of the scientific knowledge and the methods which help to answer the legal questions which generally arising in the criminal, civil, contractual, or other judicial proceedings.

One of the many disciplines which has been made and continues to make contributions to the criminology and the criminal justice is all about psychology. Psychology focuses on the behavior of the individual offenders and the forces which motivate individuals to engage in the criminal or violent behavior of people.

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The concentration of B after 0.113 s is 0.0166 M.

Assuming this is a chemical reaction where A is converting to B, and the reaction is first-order with respect to A, the rate law can be expressed as:

Rate = k[A]

where k is the rate constant.

Given:

k = 0.329 s^-1 at 283 K

[A] = 0.481 M

Time, t = 0.113 s

To calculate the concentration of B after 0.113 s, we first need to calculate the concentration of A at that time. The concentration of A at time t can be calculated using the following first-order integrated rate law:

\(ln\dfrac{[A]_t}{[A]_0} = -kt\)

where [A]t is the concentration of A at time t, and [A]0 is the initial concentration of A.

Rearranging the equation, we get:

\([A]_t = [A]_0e^{-kt}\)

Substituting the given values, we get:

[A]t = \(0.481e^{-0.329 \times 0.113}\)

[A]t = 0.457 M

Now, we can use the stoichiometry of the reaction to calculate the concentration of B. Since the reaction is first-order with respect to A, the rate of formation of B is equal to the rate of disappearance of A. Therefore, we can write:

Rate of formation of B = k[A]

The concentration of B at time t can be expressed as:

[B]t = [B]0 + (Rate of formation of B × t)

Assuming [B]0 = 0 (i.e., all the product B is formed after the reaction has proceeded for a sufficient amount of time), we get:

[B]t = k[A]t × t

Substituting the values, we get:

[B]t = 0.329 × 0.457 × 0.113

[B]t = 0.0166 M

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Answer:

sunlight

Explanation:

Photosynthesis is made possible by energy from the sun.

When two pith balls are charged by contact with a plastic rod that has been rubbed by cat fur, the charges on the pith balls will have the same sign. This is because rubbing the plastic rod with cat fur transfers electrons from the fur to the rod, leaving the rod with a net negative charge.

When the charged rod comes into contact with the pith balls, some of the excess electrons on the rod will transfer to the pith balls, giving them a negative charge as well.

Since the transfer of electrons results in both the rod and the pith balls having a negative charge, the charges on the pith balls will be the same as the rod's charge, which is negative.

Therefore, the pith balls will have a negative charge after being charged by contact with the plastic rod rubbed by cat fur.

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Answers:

(a) a = -90 m/s² or 9.18g

(b) t = 0.00667 s

(c) a = -40 m/s² or 4.08g

Explanation:

When the acceleration is constant, we can use the following equation:

Where x is the distance, v0 is the initial velocity, vf is the final velocity and t is the time. So, replacing x by 2 mm (0.002 m), v0 by 0.6 m/s, and vf by 0 m/s, we can solve for t as:

Therefore, the stopping time is 0.00667 s.

With this time we can calculate the acceleration using the following equation:

Then, to know the acceleration as a multiple of g, we need to divide 90 m/s² by 9.8 m/s² to get:

So, 90 m/s² is equivalent to 9.18g

In the same way, we can calculate the acceleration when the distance is 4.5 mm (0.0045 m). So, the stopping time is equal to:

Then, the acceleration is equal to:

Since 40/9.8 = 4.08g, we can say that -40m/s² is equivalent to 4.08g.