if you walk 8km at an average speed of 4km/h, how much time does it take

Answer:

the answer is true true

Pressure is the rate change of time of momentum divided by area. The correct answer is c.

Pressure is a measure of how much force is applied per unit area. It is defined as the rate of change of momentum of a fluid per unit area. This means that if a fluid is pushed against a surface, the pressure at that point is equal to the force exerted on the surface divided by the area of the surface.

Newton's second law of motion states that the force acting on an object is equal to the mass of the object multiplied by its acceleration, which is not directly related to pressure. Pressure is a scalar quantity and has no direction, it is a measure of how much a force is pushing or pulling in all directions.

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A non-reaction force truss is a type of truss that does not have any externally applied forces or moments acting on it at its supports or joints.

In other words, the non-reaction force truss is a statically determinate truss where all the forces acting on the members are purely internal and there is no external force or moment acting on the entire truss structure. This means that the truss can be analyzed using only the principles of equilibrium, without having to consider the external reactions.

Non-reaction force trusses are commonly used in structures such as roofs, bridges, and towers, where the supports are designed to provide only a single type of reaction force, such as compression or tension, and the other force is resisted internally by the truss members.

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Answer:

Volume

Explanation:

Bh définition The volume of an object is actually the amount of space it occupies.

She left you.. for another pokemon.

O_o - SikeBrehh 9

Answer:

cuz charmander is better lol

Explanation:

The angular velocity of the rod with some angle is 6.60rad/s.

9.8=3 w²/4

w=6.60rad/s

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In order to determine the probability that an electron can be detected in the middle one-third of a well region, we need to take into account the wave function and the boundary conditions.The wave function represents the probability density of finding the electron in a particular location within the well. The boundary conditions are determined by the geometry of the well, which can be rectangular, triangular, or other shapes.

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Answer:

60n would be the needed force

The force needed to push a box weighing 30 N up a ramp that has an ideal mechanical advantage of 3 is equal to 10 N.

The mechanical advantage can be described as the ratio of the input force to the output force. The mechanical advantage of any machine can be determined by the ratio of the forces involved to do the work.

The ratio of the resistance force to the effort is called the actual mechanical advantage which will be comparatively less. The efficiency of a machine is always determined by equating the ratio of its output to its input.

The efficiency of the machine is equal to the ratio of the actual mechanical advantage (M.A.) and theoretical mechanical advantage. Mechanical advantage can be defined as the force produced by a machine to the force applied to it.

Given the load = 30 N and the ideal mechanical advantage = 3

Mechanical advantage = Load/ Effort

Input force or effort = Load/ M.A.

Force = 30/3

Input Force = 10 N

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Answer:it takes approximately 148.8 seconds to achieve. The average person in a free-fall will hit the ground going at 9.66 m/s from the top of the Empire State Building.

Explanation:

Answer:

The long, light-colored lines extending from many craters on the Moon are called rays and are "crater rays".

Explanation:

Hope this helps :)

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Answer: Line A

Explanation: Distance AFFECTS the amount. Potential Energy DOESN'T AFFECT the distance.

Line B accurately shows the relationship between distance and the amount of potential energy stored in this system.

The amount of work required to rotate a magnetic dipole from its zero potential state to any desired position is known as the potential energy of the magnetic dipole in a magnetic field.

Here,

Maxwell's equations establish a relation between magnetic potential energy and electrostatic potential energy. The mechanical work of the magnetic force (really, magnetic torque) on the re-alignment of the vector of the magnetic dipole moment is what is known as the potential energy of a magnet or magnetic moment m in a magnetic field B.

The magnetic field's direction and distance have an impact on magnetic PE. A magnet's south pole can get close to its opposite pole's north pole. The two magnets are drawn together by this force. Their potential energy increases with increasing distance. It is possible for two north poles to collide.

The fields of the magnets are perfectly opposite one another. They are forced apart by a repelling force created by the field. Each one repels the other. The closer they are in this situation, the greater their potential energy will be.

Hence,

Line B accurately shows the relationship between distance and the amount of potential energy stored in this system.

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Answer:

S=D/T

S=2340/3.5

S=668 km/hrs

Explanation:

This experiment help us understand their behavior as well as how the people will cop up with the rules and regulation the society wants to apply on them

In a two-week simulation of a prison setting, the Stanford prison experiment was meant to look at the impact of situational factors on participants' responses and behaviors.

Hence, this experiment allows us to better understand their behavior, as well as how individuals will respond to the laws and regulations imposed by society.

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Answer:

341.46miles

Explanation:

Find the diagram attachment.

To get the displacement D, we will use the cosine rule as shown;

D² = 200²+150²-2(160)(400)cos65°

D² = 40000+22500-128000cos65°

D² = 62500+54095.14

D² = 116595.14

D = √116595.14

D= 341.46 miles

Hence the plane final displacement is 341.46miles

2 x 227 km/h = 454 m

Answer:

\(\boxed {\boxed {\sf 454 \ kilometers}}\)

Explanation:

Distance is the product of speed and time.

\(d=s*t\)

The speed of the train is 227 kilometers per hour. The time is 2 hours.

\(s= 227 \ km/hr \\t= 2 \ hr\)

Substitute the values into the formula.

\(d= 227 \ km/hr * 2 \ hr\)

Multiply and note that the hours will cancel each other out.

\(d= 227 \ km* 2\)

\(d=454 \ km\)

The train travels 454 kilometers in 2 hours.

Answer:

Point x I think

Explanation:

According to the information we can infer that the complete sentence would be: The locking lever should be placed in the "unlocked" position.

To complete the sentence we have to read the available information and look for the term that completes it based in the context. In this case we can infer that the term is "unlocked" because to unlock the fifth wheel, the locking lever needs to be positioned in the "unlocked" position.

The fifth wheel is a coupling mechanism used in heavy-duty trucks and trailers to connect the trailer to the tractor unit. It allows for articulation and provides a pivot point for turning movements.

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Answer:

hi

Explanation:

pls mark as a BRAINLIST

Answer:

The name of the force is elastic (spring) force

Explanation:

The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer

The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.

Answer: There isn't a whole ton of oxygen in space, and if they run out, they will probably die.

Explanation:

This one kind of speaks for itself.

Answer:

c

Explanation:

The difference between the momentum before and after the bounce was 1.407 kg/s.

initial energy = mg(3) J = 29.4J

After bouncing ,energy = mg(2) =19.6J

Ball's change in energy = 29.4J - 19.6J = 9.8J

This energy is dissipated in the form of heat energy or sound energy.

work done during the bounce = 9.8J

change in momentum = mvf-mvi

29.4 = 1/2m\(vi^{2}\)

vf =7.668m/s

19.6J =1/2m\(vf^{2}\)

vf=6.261m/s

Change in momentum = m(vf-vi) = 1kg x (-1.407m/s) = -1.407

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Answer:

I think is o or mavey it could be D

The speed of a wave is its wavelength multiplied by its frequency.

Wave speed and wavelength are related by the wave speed equation (Speed = Wavelength x Frequency). The wave speed can be determined using this equation if the wavelength and frequency are known.

The quantity of waves that move in a wave's frequency is measured in waves per second.

A periodic wave's wavelength is its spatial period or the length over which its shape repeats.  It is a property of both traveling waves and standing waves as well as other spatial wave patterns.

It is the distance between two successive corresponding locations of the same phase on the wave, such as two nearby crests, troughs, or zero crossings.

Therefore, The speed of a wave is its wavelength multiplied by its frequency.

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1. dependant variable

2. graph

3. model

4. experiment

6. scientific law

9. hypothesis

11. independent variable

12. theory

14. volume

15. society

W1=W2, they are directly related, k= spring constant  x= change on length of spring. x= 34-24= 10 cm

The spring constant is calculated by dividing the force required to stretch or compress a spring by the lengthening or shortening of the spring. It is used to identify whether a spring is stable or unstable, and consequently, what system it should be employed in.

It is stated mathematically as k = - F/x, which reworks Hooke's Law. Where x is the displacement caused by the spring in N/m, F is the force applied over x, and k is the spring constant.

Only in the range where the force and displacement are proportionate does Hooke's law adequately explain the linear elastic deformation of materials. Whatever the mass, a spring's elasticity will revert to its initial shape once the external force is eliminated. A characteristic is the spring constant.

Thus, W1=W2, they are directly related, k= spring constant  x= change on length of spring. x= 34-24= 10 cm.

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To determine if your converter dolly is equipped with antilock brakes (ABS), you can check for the presence of certain indicators or features:

1. Look for ABS Warning Light: Most vehicles with ABS have a warning light on the dashboard that illuminates when the ABS system is engaged or when there is a malfunction. Check if your converter dolly has an ABS warning light on the dashboard or instrument panel.

2. Inspect the Brake Components: Check the converter dolly's brake components, such as the wheel assemblies or brake control module, for any visible ABS-related components. Look for sensors, wiring harnesses, or additional valves that are commonly associated with ABS systems.

3. Review Manufacturer Specifications: Consult the manufacturer's documentation or user manual for your converter dolly. It should provide information about the features and specifications of the dolly, including whether it is equipped with ABS. Look for specific mentions of ABS or antilock braking system in the documentation.

4. Consult with the Manufacturer or Dealer: If you are still unsure, contact the manufacturer or dealer from whom you acquired the converter dolly. They should be able to provide information about the dolly's features, including whether it is equipped with ABS.

It's important to note that ABS is a safety feature that helps prevent wheel lock-up and maintain control during braking. If your converter dolly is equipped with ABS, it can enhance braking performance and stability, especially in slippery or emergency situations.

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a) The speed of object A at the end of the ramp is 1.23 m/s.

b) The speed of object B at the end of the ramp is 1.89 m/s.

(a) To find the speed of object A at the end of the ramp, we can use conservation of energy. At the beginning of the ramp, the object has potential energy, which is converted to kinetic energy at the end of the ramp. We can set these two energies equal to each other and solve for the velocity.

The potential energy at the beginning of the ramp is:

\(PE = mgh = (0.175 kg)9.81 m/s^2)(0.215 m) = 0.341 J\)

At the end of the ramp, the kinetic energy is:

\(KE = (1/2)mv^2\)

We can set these two equal to each other:

PE = KE

\(0.341 J = (1/2)(0.175 kg)v^2\)

Solving for v, we get:

\(v = \sqrt{ ((2*0.341 J)/(0.175 kg))} = 1.23 m/s\)

Therefore, the speed of object A at the end of the ramp is 1.23 m/s.

(b) To find the speed of object B at the end of the ramp, we need to take into account its rotational kinetic energy as well as its translational kinetic energy. We can use the parallel-axis theorem to find the moment of inertia of the hollow cylinder, which is:

\(I = (1/2)mr^2\)

where m is the mass of the cylinder and r is its radius. Since the mass and radius are the same as object A, we can use the same values as before: m = 0.175 kg and r = 0.29 m.

The potential energy at the beginning of the ramp is the same as before: PE = 0.341 J.

At the end of the ramp, the total kinetic energy is the sum of the translational kinetic energy and the rotational kinetic energy:

\(KE = (1/2)mv^2 + (1/2)Iw^2\)

where w is the angular velocity of the cylinder. Since the cylinder is rolling without slipping, the linear velocity v is related to the angular velocity w by:

v = rw

We can substitute this relationship into the expression for KE:

\(KE = (1/2)mv^2 + (1/2)(1/2)mr^2(w^2)\)

We can set PE equal to KE and solve for v:

PE = KE

\(0.341 J = (1/2)mv^2 + (1/2)(1/2)mr^2(w^2)\)

Substituting v = rw, we get:

\(0.341 J = (1/2)m(rw)^2 + (1/4)mr^2(w^2)\)

Simplifying and factoring out w^2, we get:

\(0.341 J = (1/4)mr^2w^2(3 + 2)\\0.341 J = (5/4)mr^2w^2\)

Solving for w, we get:

\(w = \sqrt{((4*0.341 J)/(5mr^2))} = 6.54 rad/s\)

Substituting back into v = rw, we get:

v = rw = (0.29 m)(6.54 rad/s) = 1.89 m/s

Therefore, the speed of object B at the end of the ramp is 1.89 m/s.

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A is the correct answer. The arrow pointing up in A represents the force of gravity (mg).

Force is an external influence that can change the motion, direction, shape, and/or energy of a physical object. It can be a push, a pull, or a twist, and it can act on an object at a distance. Force is a vector quantity, meaning that it has both magnitude and direction.

The arrow pointing to the right represents the normal force (N), which is the force that the surface exerts on the block in order to keep it from sinking into the surface due to gravity. The arrow pointing down in A represents the frictional force (f), which is the force that the surface exerts on the block in order to prevent it from sliding along the surface.

1)

T > mg

The force due to tension acts upwards on the box and the force due to gravity acts downwards on the box. As the box is accelerated upwards then the T should be greater than the weight of the box.

ma = T - mg

mg = T- ma

Therefore, T> mg

2)

The option A, best describes the free body diagram.

3) In option A, the normal force is equal to the weight of the block which is kept at rest. N = mg

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