Technician A says that leather shoes offer more protection than canvas shoes. Technician B says that steel toed boots are essential to protecting your feet from injury. Which technician is correct?

A) Technician A only B) Technician B only

C) Both technicians A and B D) Neither technician A nor B

Average Velocity=Total Displacement/Total Time

\(\\ \sf\longmapsto Average\: Velocity=\dfrac{825}{118}\)

\(\\ \sf\longmapsto Average\:Velocity\approx 8m/s\)

If your car gets 37.4 miles per gallon, it is approximately equivalent to 15.89 kilometers per liter.

To convert miles per gallon (mpg) to kilometers per liter (km/L), we can use the conversion factors of 1 mile ≈ 1.60934 kilometers and 1 gallon ≈ 3.78541 liters.

Given that the car gets 37.4 miles per gallon, we can calculate the equivalent in kilometers per liter.

First, we convert miles to kilometers by multiplying 37.4 mpg by 1.60934 km/mile, which gives us approximately 60.07 km/gallon.

Next, we convert gallons to liters by dividing 60.07 km/gallon by 3.78541 L/gallon, resulting in approximately 15.89 km/L.

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At the lowest point of her swing, she can withstand a maximum speed of 10.78 m/s.

Given that,

Mass of the carpenter = 61.7 kg

Length of the rope = 11.5 m

Capable force = 1229 N

Centripetal force acting on the body,

F = mv²/r = (61.7× v²)/11.5 = 5.37 v²

Gravitational force acting on her is

F = m × g = 61.7 × 9.81 = 605.28 N

By summing up gravitational and centripetal forces to get the total available force,

5.37 v² + 605.28 = 1229

5.37 v² = 623.72

v² = 116.15

v = 10.78 m/s

Hence, the maximum speed at the low point of her swing is 10.78 m/s.

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Answer:

\( \boxed{\sf Time \ in \ which \ train \ will \ come \ to \ rest = 20 \ sec} \)

Given:

Initial velocity (u) = 30 m/s

Final speed (v) = 0 m/s

Acceleration (a) = - 1.5 m/,s²

To Find:

Time in which train will come to rest (t).

Explanation:

\(\sf From \ equation \ of \ motion: \\ \sf \implies \bold{v = u + at} \\ \\ \sf Substituting \ value \ of \ v, \ u \ and \ a: \\ \sf \implies 0 = 30 + ( - 1.5)(t) \\ \sf \implies 0 = 30 - 1.5(t) \\ \sf \implies 30 - 1.5(t) = 0 \\ \\ \sf Subtract \: 30 \: from \: both \: sides: \\ \sf \implies (30 - \boxed{ \sf 30}) - 1.5(t) = \boxed{ \sf - 30} \\ \\ \sf 30 - 30 = 0 : \\ \sf \implies - 1.5(t) = - 30 \\ \\ \sf Divide \: both \: sides \: of \: - 1.5(t) = - 30 \: by \: - 1.5 : \\ \sf \implies \frac{ - 1.5(t)}{ \boxed{ \sf - 1.5}} = \frac{ - 30}{ \boxed{ \sf -1.5 }} \\ \\ \sf \frac{ \cancel{ \sf 1.5}}{\cancel{ \sf 1.5}} = 1 : \\ \sf \implies t = \frac{ - 30}{ - 1.5} \\ \\ \sf \frac{ - 30}{ - 1.5} = \frac{\cancel{ \sf 1.5} \times 20}{\cancel{ \sf 1.5}} = 20 : \\ \sf \implies t = 20 \: sec\)

So,

Time in which train will come to rest = 20 seconds

The bat should fly about 0.8065 m/s in order to hear a beat frequency of 8 Hz.

The shift in a wave's frequency caused by an observer moving away from the wave source is known as the Doppler effect or Doppler shift. The equation for this is given by,

\(f=\frac{v \pm v_0}{v\mp v_s}f_s\)

where f is the observed frequency, v is the speed or velocity of the sound waves, v₀ is observer velocity ("+" if it's towards and "-" if it's away from the source), vs is source velocity("-" if it's towards and "+" if it's away from the observer), and fs is the actual frequency of the sound waves.

The velocity of sound waves in the air is 344 m/s, v₀ is zero for the incident, v is the source velocity towards the wall, and fs is 1700 Hz.

Then, the incident frequency is given by,

\(f_{incidence}=\frac{344-0}{344-v}\times f_s\)

The wall is stationary, therefore, f(incidence)=f(reflected). Then, the new frequency the bat hears is,

\(\begin{aligned}f_{new}&=\frac{344+v}{344}\times f_{reflected}\\&=\frac{344+v}{344}\times \frac{344-0}{344-v}\times f_s\\&=\frac{344+v}{344-v} \times f_s\end{aligned}\)

To hear a beat frequency of 8 Hz, the velocity of the bat should be,

\(\begin{aligned}f_{new}-f_s&=8\\\left(\frac{344+v}{344-v} \right)f_s-f_s&=8\\\frac{344+v}{344-v}-1&=\frac{8}{f_s}\\\frac{344+v-344+v}{344-v}&=\frac{8}{1700}\\2v&=0.0047(344-v)\\2v&=1.6168-0.0047v\\2.0047v&=1.6168\\v&=\mathrm{0.8065\;m/s}\end{aligned}\)

The answer is 0.8065 m/s.

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Motion means movement, the laws of Physics state  there are mainly 4 types of motion, i.e.

Rotary Motion:  It is the type of motion which deals with rotation of body, it is a special type of motion in which the object is on rotation around a fixed axis like, a figure skater rotating on an ice rink.

Oscillatory Motion:It is a repeating motion in which an object continuously repeats in the same motion again and again like a swing.

Linear Motion: It is  a one-dimensional motion on a straight line, like an athlete running on a straight track.

Reciprocating Motions: A repetitive and continuous up and down or back and forth motion like a needle in a sewing machine

There are also different other types of motion as per directions or as per state of motion.

Types of motion as per state

Uniform Motion

Non-Uniform Motion

Types of motion as per direction

One Dimensional Motion

Two Dimensional Motion

Three Dimensional Motion

Answer:

The velocity after 2.5 seconds is 11.3 m/s

Explanation:

Given;

u = 35.8 m/s

t = 2.50s

g = 9.8 m/s^2

Mathematically;

V = U-gt

Substituting these values;

V = 35.8-2.5(9.8)

V = 35.8-24.5

V = 11.3 m/s

The acceleration of the object with an applied force of 100N and a mass of 50kg is 2m/s².

Acceleration is defined as the change in velocity per unit time. Velocity is defined as the speed of the object in a particular direction. The acceleration is a vector quantity. The unit of acceleration is m/s².

According to Newton's second law, Force is directly proportional to the acceleration of the object. F = m×a, where F is the force of the object, m is the mass of the object and a is the acceleration of the object.

From the given,

Force, F = 100N

mass of the object, m=50kg

acceleration of the object, a=?

F = m×a

a =F/m

  = 100/50

  =2m/s².

Thus, the acceleration of the object is 2m/s².

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Mechanical energy is used to start the Ferris wheel, providing the initial rotation and motion to the wheel.

The motion of the wheel then causes the lights along the seats to be powered, allowing them to light up as the wheel turns. The wheel is then able to generate kinetic energy as it moves, which it then uses to continue turning.

As the wheel turns, it transfers its energy from mechanical to kinetic, and this energy is used to keep the wheel moving from start to finish. Kinetic energy is also used to power the centrifugal force which keeps the riders in their seats as the wheel turns, allowing them to enjoy the ride.

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To count the number of valence electrons, you need to determine the group number of the element in the periodic table and sum up the valence electrons for all atoms in the molecule or ion.

The Lewis structure is a representation of the molecule or ion, showing the arrangement of atoms and valence electrons. The central atom is usually the least electronegative element or the one with the highest valence. To determine the electron geometry, you consider the arrangement of electron groups (bonded and lone pairs) around the central atom using the VSEPR theory.

Counting the number of valence electrons: Look at the periodic table and find the group number of each element in the molecule or ion. The group number represents the number of valence electrons. For example, carbon (Group 14) has 4 valence electrons, oxygen (Group 16) has 6 valence electrons, etc. Sum up the valence electrons for all atoms to get the total number of valence electrons.

Drawing the Lewis structure: The Lewis structure is a visual representation of a molecule or ion that shows the arrangement of atoms and valence electrons. Start by connecting the atoms with single bonds. Distribute the remaining valence electrons as lone pairs around the atoms, following the octet rule (except for hydrogen, which only needs 2 electrons). Aim to minimize formal charges and achieve stability.

Determining the central atom: The central atom is usually the least electronegative element or the one with the highest valence. Carbon is often a central atom, but other elements like nitrogen or oxygen can also be central depending on the molecule or ion.

Determining the electron geometry: To determine the electron geometry, use the Valence Shell Electron Pair Repulsion (VSEPR) theory. Count the total number of electron groups around the central atom. Electron groups can be bonded pairs (atoms connected by single, double, or triple bonds) or lone pairs.

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The applied force, F, and the friction force, f, act on the cabinet in the direction of motion (x-axis). Therefore,

F + (-f) = mg

Now, by using the formula for static friction :

f = mg

f = (0.80)(30)(9.8)

f = 235.2 kg m/s² or,

Therefore, the magnitude of the friction force is 235.2 N.

Static friction is a force that holds an object at leisure. It is the friction encountered when individuals try to move a fixed object on a surface without initiating any relative motion between the body and the surface on which it is.

A force acting on an object is static force if it does not change that particular object's size, position, or direction. The force involved in a structure acts as a load to that precise structure. This is why static force is also known as a static load.

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The resistance of a conductor that carries a current of 120 amperes when the potential difference between its ends is 240 volts = 2 Ω

Electrical resistance is the force that opposes the flow of current, it's a component that can reduce the speed and quantity of the flow of electrons in an electric circuit.

The formula for electrical resistance can be seen to have several components, namely R is the resistance (Ω), V is the voltage (V), and I is the current strength (A).

The equation:

R = V/I

We have,

Current strength = 120 A

The potential difference between its ends  = 240 V

So, the resistance of a conductor that carries a current of 120 amperes when the potential difference between its ends is 240 volts:

R = 240 V / 120 A

= 2 Ω

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Answer: Find the answer in the explanation

Explanation:

The music playing on the radio will be heard through the sound waves coming from the radio.

The travelling wave will obey Newton's first law of motion which state that:

An object or particle will remain at rest or continue its linear motion in a straight line except an external force is applied.

The external force through wind could affect the travelling of the sound waves. Since the wave is longitudinal wave. That is, it needs a medium (air) for its propagation.

The mass of an object indicate the amount of matter it contains, and the weight is a force that results from the action of gravity on the mass of the object.

When we are referring to the amount of matter that a body or an object contain we should use the magnitude of the mass and not the weight that is because the weight is a force.

It is the physical magnitude that expresses the force exerted by gravity on the mass of a body, this is expressed in units of the international system in Newton.

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Explanation:

Density=mass/volume

density= 3.5 g ÷ 5.5cm

density=0.63

The reason why the micropipette must be calibrated with oleic acid solution and not with water is that Oleic acid can spread out unlike water. Hence, the drop volume will be different skewing the volume.

Oleic acid does have the characteristic of spreading out across a monolayer with a measurable thickness. Water, on the contrary hand, contains a variety of drop sizes, which skews the volume and thus affects the calibration. Because of this, oleic acid is recommended.

Water repels the non-polar chain (it is hydrophobic), while water attracts the polar end (hydrophilic). A very dilute oleic acid solution in pentane shall be used. The pentane evaporates quickly, leaving behind a thin layer of plain oleic acid.

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Answer:

You kinda left out the options you want us to choose from.

Resend the question with Full details

The schematic of an electric circuit is clear and standardized while the artist drawing depicts a higher level of the features.

This can be defined as a path along which the whole current flows through each component.

The schematic shows the connections and components in an electrical circuit and how they are connected while the artist drawing shows how the features mentioned together with how they are arranged.

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Answer:

2892.31 N

Explanation:

Applying,

P = F×v................ Equation 1

Where P = power of the motor, F = Weight of the load the motor can lift, v = velocity

make F the subject of the equation

F = P/v.............. Equation 2

Given: P = 188 W, v = 0.065 m/s

Substitute into eequation 2

F = 188/0.065

F = 2892.31 N

Hence the weight of the load is 2892.31 N

The vertical lines in a fold and thrust belt likely represent faults.

The vertical lines in a fold and thrust belt likely represent faults. Faults are breaks in the Earth's crust along which there has been displacement of the rock on either side of the break. The vertical lines in a fold and thrust belt are typically caused by compressional forces that squeeze the crust together.

This compressional force causes the rock to bend and fold, and eventually, the rock breaks along a fault plane. The vertical lines in a fold and thrust belt are typically parallel to the direction of the compressional force.

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Answer: average annual rainfall, average annual temperatures, types of plants and animals native to the area

Explanation: the best way you can identify a biome is by telling which animal or species are native to the certain area

Answer:

Most probably mass and volume

Explanation:

i dont think you can really measure it from its color i dont think measurements work that way lol. temperature cant be the option because all of them are likely to be in the same condition and time is just an absurd way to measure a object

For the solar cooker project, the two measurements that students should make to determine the dependent variable are: temperature and time.

Two measurements that students should make to determine the dependent variable are :

Temperature: The students should measure the temperature of the food being cooked at different times of day and under different conditions, such as with or without insulation, with or without reflective materials, and so on. The temperature would be dependent variable because it is directly related to the rate of cooking. The higher the temperature, then faster the food will cook.

Time: The students should measure the time it takes to cook the food under different conditions. The time would be a secondary dependent variable because it is also directly related to rate of cooking. The faster the food cooks, the shorter the cooking time will be.

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Answer:

electromagnet

Explanation:

mark me as brainlest

Since the speed formula is = Distance / time

speed = distance /time

speed = metre/ seconds

speed = m/s

Answer:

a) m/s- meters per second

Explanation:

Recall that m/s (meters per second) is the official derived SI unit for speed. That is, it is length (meters) over time (second), hence m/s.

It can't be joules (J), since that is the SI unit for work & energy.

It also can't be newtons (N), since that is the SI unit for force.

Therefore, the correct answer is a) m/s- meters per second.

I hope this made sense to you, if not, feel free to let me know and I can try to provide further assistance.

According to Einstein's mass-energy equivalence (E=mc²), if 1.8 x 10^14 J is released in a nuclear reaction, the amount of matter lost is approximately 2 x 10^-3 kg.

According to Einstein's mass-energy equivalence, the equation E=mc² relates energy (E) to mass (m) and the speed of light (c). If 1.8 x 10^14 J of energy is released in a nuclear reaction, we can calculate the amount of matter lost. Rearranging the equation to m=E/c², we divide the energy released by the square of the speed of light (c=3 x 10^8 m/s). Substituting the values, we find that approximately 2 x 10^-3 kg of matter was lost. This loss of mass is converted into energy during the nuclear reaction, demonstrating the conversion of matter into a significant amount of energy.

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Answer:

the process of comparing unknown quantities with known standards quantities are known as measurement

Answer:

700 N right -->

800- (60+40)

800-100

700 N

Answer:

Coring is a defect in an alloy (e.g., a copper nickel alloy) that occurs when a heated alloy is cooled too fast for diffusion to occur.

Explanation: