Why the tools meant for cutting and piercing always have sharp edges

The following exercises are frequently employed in modern ballistic training: medicine ball throws, bench throws, jump squats, cleans, snatches, and push presses.

Elite athletes employed ballistic training to improve their ability to perform explosively for the first time in contemporary times. Reaching over to touch your toes while bouncing to extend the range is an illustration of ballistic stretching.

Due to the risk of injury and lack of benefits compared to other, safer forms of stretching like PNF and dynamic stretches, this sort of stretching is infrequently advised. The term "ballistic" describes a training technique in which an external object or the athlete's body is explosively launched into a flight phase. This can involve exercises like jumps, throws, and strikes.

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A pendulum bob's kinetic energy is greatest at the bottom of the pendulum. If kinetic energy is largest near the bottom of the pendulum, potential energy is lowest there.

An active pendulum has the most kinetic energy at the bottom of its swing when the weight moves fastest. An ideal pendulum system always contains a steady amount of mechanical energy, the sum of kinetic and potential energy.

When the pendulum swings, it moves back and forth between its equilibrium or rest positions. The pendulum has kinetic energy except at the tipping point of the system where the pendulum velocity is zero. Pendulums also have potential energy associated with their height from the equilibrium position.

As the pendulum swings, potential energy changes to kinetic energy, back to potential energy, back to kinetic energy, and so on.

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Answer:

[tex]m=\frac{w}{g}[/tex]

Explanation:

Since w=mg we can find the formula for mass

Answer:  A big Yes

Explanation: Viscosity depends strongly on temperature. In liquids, it usually decreases with increasing temperature, whereas, in most gases, Viscosity increases with increasing temperature.

As temperature increases, the average kinetic energy of the molecules also increases; it more easily overcomes the attractive forces between molecules. Therefore, Viscosity decreases with increasing temperature.

For example, when syrup is cold it has a high viscosity and can be difficult to pour. When heated in a microwave, the viscosity decreases and the syrup flows more freely. Similarly, Honey and oil tend to flow better at higher temperatures.

Both cohesion and molecular interchange contribute to liquid viscosity.  With high temperatures, viscosity increases in gases and decreases in liquids, the drag force will do the same.

When a liquid is heated, the kinetic energy of its molecules increases and the intermolecular attraction becomes weaker. Hence, the viscosity of a liquid decreases with an increase in its temperature.

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The specific heat capacity of the metal is 0.17 J/g*C.

To determine the specific heat capacity of the metal, we can use the formula:

Q = mcΔT

Where Q is the heat absorbed or released, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.

We know that the heat absorbed by the metal is equal to the heat lost by the water:

Qmetal = Qwater

We know the mass of the water, the initial and final temperature of the water, and the mass of the metal and the initial and final temperature of the metal. We can use this information to calculate the heat absorbed by the water and the heat absorbed by the metal.

Qwater = mwater * cwater * ΔTwater

Qmetal = mmetal * cmetal * ΔTmetal

We know that the heat absorbed by the metal is equal to the heat lost by the water, so we can set the two equations equal to each other:

mwater * cwater * ΔTwater = mmetal * cmetal * ΔTmetal

And we know that the specific heat of water is 4.18 J/g*C and the mass and the initial and final temperature of the water and the mass and the initial and final temperature of the metal

cmetal = mwater * cwater * ΔTwater / mmetal * ΔTmetal

cmetal = (140.0 g * 4.18 J/gC * (24.6 - 25.0)°C ) / (120.9 g * (24.6 - 100)) = 0.17 J/gC

So the specific heat capacity of the metal is 0.17 J/g*C.

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Newton's first law, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will remain in motion with a constant velocity unless acted upon by an external force.

In simple terms, it says that an object will remain in its current state of motion unless acted upon by a net force.

This means that if an object is moving in a straight line at a constant speed, it will continue to move in that way unless something changes its motion.

Similarly, if an object is at rest, it will stay at rest unless something applies a force to it. This law is fundamental in understanding the principles of motion and forms the basis for many other laws of physics.

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Torque is calculated using the formula, τ = r × F, where, r is the perpendicular distance, F is the force.

It is also described as the cross product of distance vector and force vector. Mathematically, τ = r × F = r F sinθ, where, θ is the angle between r and F.

For example, a force is applied to a particle free to rotate about a fixed axis. Force is shown divided into perpendicular and parallel components. Torque is pointed outward from the page and has the magnitude

τ = r F sinθ

Newton-meters, sometimes known as N.m, are the SI units for torque. Although these units are the same as joules, torque isn't considered to be work or energy, therefore N.m should be used instead.

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The three points like 2i +3j - 4k, 1i - 2j + 3k, and - 7j + 10k are collinear in terms of their position vectors.

If three or more points fall along a single straight line, they are said to be collinear. An axis is a term used to describe a line on which points are located, particularly if that line is connected to a triangle or other geometric shape. Since two points determine a line, two points are trivially collinear.

It is not always possible for the three spots to coincide. This indicates that depending on where these points are located in a plane, they may be collinear or noncollinear. If the slope between any two pairs of points is equal, three points are said to be collinear.

Three pairs of points can be created from the three points R, S, and T.

Assume A=2i+3j-4k.

B=i-2j+3k

C=-7j+10k

AB's current position vector is (i-2j+3k) - (i+3j-4k).

= -i-5j+7k

Now, BC's p.v. equals (-7j+10k) minus (i-2j+3k).

= -i-5j+7k

The p.v. of AB and BC are same. Therefore, the points are parallel and collinear.

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Correct Question:

Show that the three points whose position vectors are 21 +3j - 4k, 1i - 2j + 3k and - 7j + 10k are collinear.

Magnitude of vector is always positive, because a minus sign in a vector only indicates direction, not magnitude.

A quantity's measurement or its absolute value is referred to as its magnitude. A positive real number is used to represent the magnitude of an object. To put it another way, the magnitude of a quantity is just its size. You can't have a negative magnitude. It refers to the portion of the vector that does not point in any particular direction (positive or negative). For the formula to work, the values inside the summation must be squared, turning them into positive numbers.

Example:

∥a∥ = √ (-2²) + (-3²)

∥a∥ = √ 25

∥a∥ = 5

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Answer:

[tex]a=3.6\frac{m}{s^2}[/tex]

Explanation:

First, use kinematic equation #3: [tex]\Delta x=v_it+\frac{1}{2}at^2[/tex].  For this problem, let

[tex]\Delta x=48m\\v_i=0.0\frac{m}{s}\\t=5.2s[/tex]

Next, rewrite the kinematic equation to solve for acceleration (a):

[tex]a=2(\frac{\Delta x-v_it}{t^2})[/tex]

Last, put in the given values on the right side of the equation for acceleration and solve:

[tex]a=2(\frac{(48m)-[0.0\frac{m}{s}(5.2s)]}{(5.2s)^2})\\a=2(\frac{48m}{27.04s^2})\\a=3.55\frac{m}{s^2}[/tex]

A automobile with a mass of 1000 kg and a speed of 30 m/s has kinetic energy equal 450,000 J.

If an object's mass increases, so will its kinetic energy. The object's speed is given by v. The aforementioned connection demonstrates that an object's kinetic energy is directly proportional to the sum of its mass and velocity.

Possible explanation: Because kinetic energy and speed are closely correlated, an object's kinetic energy increases as its speed increases. The nonlinear (square) proportional relationship (KE v2) between kinetic energy and speed 1. As an object's speed doubles, its kinetic energy grows four times. 2. As the object's speed is halved, the kinetic energy falls by a factor of four.

K.E: 1/2 *m * v^2

K.E= 1/2* 1000* 30^2

K.E = 450,000 J

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Relative Centrifugal Force or g force is calculate with the formula-

g force (RCF)= (RPM)² x 1.118 x 10⁻⁵ x r where, r is the radius .

The relative centrifugal force, or g force, is the radial force generated by the spinning rotor in relation to the gravitational force of the Earth. The g force acting on particles is proportional to the rotational speed measured in revolutions per minute (RPM).

Increasing the rotational speed by a factor of four increases the centrifugal force. The centrifugal force increases with distance from the axis of rotation. When choosing the right centrifuge, these two parameters are crucial.

The RCF or g force is proportional to the rotational speed in RPM and the particle distance from the centre of rotation. When the rotational speed is given in RPM and the distance (r) is given in centimetres.

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The following forces govern the motion of common objects that is gravity, friction, and applied forces.

Every thing was pulled downward by gravity, which prevented them from rising into the air. Every movement is subject to forces from friction in the opposite direction. Applied forces dictate how objects move according on the purpose of people who apply them.

The electromagnetic force, weak and strong nuclear forces, gravitational force, and other fundamental forces all play important roles in the cosmos. However, the main factors of relevance when it comes to the motion of common things are gravity, friction, and applied force.

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The 50 kg mass on 4 m2  on will exert more pressure.

Pressure is described as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Mathematically pressure = force / area

From Newton's second law

force = mass x acceleration where Acceleration due to gravity = 9.8m/s²

Comparing both pressures where

P1 = 100x 9.8 / 10

p1 = 100 pa

p2 = 50 x  9.8/ 4

p2 = 125 pa

Therefore The 50 kg mass on 4 m2  on will exert more pressure since it exerts more pressure.

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This is because the spring with the mass m will have a lower force pushing it up, due to the lower mass, which will cause the spring to stretch further and have a lower equilibrium position.

 Equilibrium is a state of balance in which opposing forces are equal and in balance with each other. In economics, it is a situation in which the demand for a product or service is equal to the supply. This is usually achieved when the price of the product or service is at a point where the quantity demanded is equal to the quantity supplied. This point is known as the market equilibrium price. When the market is at equilibrium, it is in a stable position and no change in prices or quantity is needed. The concept of equilibrium is important in economics because it helps to understand how prices and quantity supplied and demanded are determined in the market.

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Jamal should move the car from Point A to Point B,which will increase its potential energy.

The energy that an object has stored in it due to its position or configuration is known as potential energy. It is the energy an object possesses due to its position relative to other objects, stresses within itself, its electric charge, or other factors. The ability of an object to do work by virtue of its position is called potential energy. Examples of potential energy include the energy stored in a stretched elastic band or a raised weight

Jamal should move the car from Point A to Point B. This movement will result in the largest increase in potential energy because Point B is higher than Point A, and thus the car will gain potential energy as it moves to a higher elevation. The magnetic force that will act on the vehicle is the magnetic repulsion force. This force is created by the magnetic fields of the two cars, which act to push the cars apart. This force is what causes the car to move up the incline and gain potential energy.

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change in momentum during this time is 2166.71 kg m/s.

To find the change in momentum during this time, we can use the equation for momentum, which is:

momentum = mass x velocity

We can also use the equation for acceleration:

       a = (vf - vi) / t

Where "a" is acceleration, "vf" is final velocity, "vi" is initial velocity and "t" is time.

We are given that the car's initial velocity is 18 m/s east, the acceleration is 1 m/s2, and the time is 1.57 s. We can use these values to find the car's final velocity:

vf = vi + (a x t)

vf = 18 + (1 x 1.57)

vf = 19.57 m/s east

Now that we know the final velocity of the car, we can use the equation for momentum to find the change in momentum:

change in momentum = mass x (vf - vi).

change in momentum = 1383 x (19.57 - 18).

change in momentum = 1383 x 1.57.

change in momentum = 2166.71 kg m/s.

So, during this 1.57s of time, the car's momentum changes from 18m/s to 19.57m/s east and total change in momentum is 2166.71 kg m/s.

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A change in the magnetic field surrounding conductor induces a voltage in the conductor and this induced voltage is known as electromotive force.

The electric potential generated by either electrochemical cell or  changing magnetic field is called electromotive force and is is also known as voltage. Changing magnetic field induces additional electromotive force, or voltage in the conductor. Induction of this additional voltage is called self-induction because it is induced within conductor itself.

If a coil of wire is placed in changing magnetic field, current will be induced in the wire and this current flows because something is producing electric field that forces the charges around wire.

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Newton's first law states that an object will continue to move unless a force acts on it. The second law states that force equals mass times acceleration.

Newton's first law, also known as the law of inertia, states that a body at rest will remain at rest and a body in motion will continue to move at a constant speed unless acted upon by an external force. I'm here. This means that the object will maintain its current state of motion unless a net force acts on it.

Newton's Second Law, also known as the Law of Acceleration or the Law of Force, states that the acceleration of a body is directly proportional to the net force acting on it and inversely proportional to its mass. This means that the force on an object is equal to its mass multiplied by its acceleration.

Newton's Third Law, also known as the "Law of Action and Reaction" or "The Law of Reciprocity", states that for all actions there are equal and opposite reactions. This means that when one object exerts a force on her second object, the second object exerts an equal and opposite force on the first object.

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The kinetic energy of the merry-go round after 2.5 s is 72.4 J.

The acceleration of the merry go round is calculated from Newton's second law of motion.

F = ma

where;

W = mg

m = W / g

where;

m = ( 779 / 9.8 )

m = 79.5 kg

a = F / m

a = ( 43.1 N ) / ( 79.5 kg )

a = 0.54 m/s²

The velocity of the merry go round after 2.5 seconds is calculated as;

v = at

v = ( 0.54 x 2.5 s )

v = 1.35 m/s

The kinetic energy of the merry go round is calculated as;

K.E = ¹/₂ x 79.5 x 1.35²

K.E = 72.4 J

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Newton, There will be mass is 4.080, So acceleration will be equals to 2.50 m per cent in the square.

The crate’s acceleration is 0 since its velocity is constant. As a result, the total of the forces equals zero. Because the forces resist each other, the lifting force must be equal to the weight of the item. The magnitude of the upward force on the container is thus 490.5 Newtons.

The amount of force is expressed as mass times length times time squared. The most common metric unit is the newton (N), which is defined as one kilogram times one meter over one second squared. Magnitude – Distance Formula – used to calculate the connection between apparent magnitude, absolute magnitude, and object distance.

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The two factors upon which torque depends are the magnitude of force and the perpendicular distance from the point to the line of action of force.

It is also called as moment of force. The standard units of torque are N.m.

Mathematically, torque is written as, τ = r × F.

where, τ is torque, r is perpendicular distance, F is force.

Three factors affect how much torque a rigid body produces. the applied force, the vector of the lever arm that connects the torque measurement point to the application point of the force, and the angle formed by these vectors. τ = r F sinθ  

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High rates of attrition is particularly problematic for longitudinal research.

There are two major issues with attrition. First, attrition reduces the size of the sample, and when the sample size is too low, statistical power is compromised. In the event that attrition is not random, it may also result in non-response bias (which affects the validity of the study findings).

High rates of observation, generalization, attrition, and deception complicate longitudinal studies. So, a longitudinal study is one in which a group of people is followed over an extended period of time.

Attrition rates or churn rates typically show how quickly employees change jobs, while low attrition rates show how long employees stay with a company. The size of your business will also affect the employee attrition rates.

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A radius of the pulley, which is the distance from the rotating axis, is multiplied by the force (F) to determine load torque (r). I

A total torque about axis is produced by the addition of the separate torques. The net torque about the shaft is the sum of the various torques when the proper signal (positive or negative is applied to the magnitudes of the individual torques about the given axis: →τnet=∑i|→τi|.

Result for an image How do you determine a wheel's net torque, An object may be under the influence of many forces, each of which may act at a different position on the item. Next, each force will result .

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Answer:

Answer: Diamond has a refractive index of 2.42 which means that the speed of light in diamond will reduce by a factor of 2.42 as compared to its speed in the air. In other words, the speed of light in diamond is 1/2.42 times the speed of light in vacuum.

Answer:

The refractive index of a material is a measure of how much a material bends light as it passes through it. The refractive index of a material is defined as the ratio of the speed of light in a vacuum to the speed of light in the material. A refractive index of 2.42 for diamond means that light travels through diamond at about 42% slower than it does in a vacuum. This high refractive index is due to the high density and strong chemical bonds of the carbon atoms in diamond. This high refractive index gives diamond its characteristic brilliance and fire, and makes it

Due to extensive passport - coalition option (a) is correct.

What is bureaucratic red tape?

Red tape is overly restrictive formal regulations or inflexible adherence to them that is seen unnecessary or bureaucratic and gets in the way of doing things or making decisions. Governments, businesses, and other large organizations are typically the target of it.

What is coalition?

A coalition government might also be established during a period of national difficulty or crisis (for instance, during a time of war or economic crisis) to provide a government with the high level of perceived political legitimacy or collective identity. It can also play a role in reducing internal political strife.

Therefore, due to extensive passport - coalition option (a) is correct.

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A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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Answer:

400m/s

Explanation:

Frequency = 250hz

Wavelength = 1.6m

velocity =?

Velocity = Frequency × Wavelength

velocity = 250×1.6

V= 400m/s

About 2,900 kilometers (1,802 miles) beneath the surface of the Earth, the core can be located.

Distance is a measurement of how far apart two things or points are, either numerically or occasionally qualitatively. Distance can refer to a physical length in physics or to an estimate based on other factors in common usage.

Furthermore, it is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.

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1 Nm (Newton-meter) is a unit of torque, which is a measure of the twisting force applied to an object, such as a shaft or a nut.

It is defined as the amount of force required to rotate an object around an axis by one radian (about 57.3 degrees). In other words, one Nm of torque is equal to the force of one Newton (N) acting at a distance of one meter (m) from the axis of rotation. It is a common unit of torque used in the field of mechanics and engineering, particularly in the design and operation of machines and vehicles. Torque is also related to the angular velocity of an object, and the rotational energy, which is calculated by multiplying the torque by the angle through which the object rotates. In a mechanical system, torque is often controlled by adjusting the position of the mechanical load or by applying a force to a lever to generate torque.

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