PLS HELP ITS WORTH SO MANY POINTS AHH
LONGITUDINAL
SURFACE
TRANSVERSE
HEAT

The work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.

According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

F = ma

\(F= \frac{mv}{t}\)

The force applied to an object increases with increases in the velocity of the object.

In the given diagram, the resultant velocity of the puck is calculated as follows;

Figure a:

\(\Delta v = v_f -v_i\\\\\Delta v = 5 - 6 = - 1 \ m/s\)

Figure b:

\(v = \sqrt{4^2 + 3^2} \\\\v = 5 \ m/s\)

Figure c:

\(\Delta v = 4 - (-2)\\\\\Delta v = 6 \ m/s\)

Thus, the work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.

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Answer:

a

Explanation:

The instantaneous power of the engine of the car is 121 kW.

The given parameters:

The force exerted by the car is calculated as follows;

\(F = \frac{m(v- u)}{t} \\\\F = \frac{1500(27.78-0)}{5.2 } \\\\F = 8013.46 \ N\)

The total force exerted on the engine is calculated as follows;

\(F= 8013.5 \ N + \ 700 \ N\\\\ F = 8713.46 \ N\)

The instantaneous power of the engine is calculated as follows;

\(P = F\bar v\\\\P = F \times (\frac{v-u}{2} )\\\\P = 8713.46 \times (\frac{27.78 -0}{2} )\\\\P = 1.21 \times 10^5 \ W\\\\P = 121 \ kW\)

Thus, the instantaneous power of the engine of the car is 121 kW.

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Explanation:

The acceleration on an object due to the gravity of any massive body is represented by g (small g). The force of attraction between any two unit masses separated by unit distance is called universal gravitational constant denoted by G(capital g). The relation between G and g is not proportional. That means they are independent entities.

G and g

In physics, G and g can be related mathematically as –

\(g=\frac{GM}{R^{2}}\)

Where,

1=g is the acceleration due to the gravity of any massive body measured in m/s2.

2=G is the universal gravitational constant measured in Nm2/kg2.

3=R is the radius of the massive body measured in km.

4=M is the mass of the massive body measured in Kg.

Answer:

I = 0.75 Amp

Explanation:

Ohm's Law

Ohm's law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points. The constant of proportionality is called the Resistance (R) of the conductor.

The formula can be expressed as:

V = I.R

The intensity of the current through a resistor can be calculated by solving the equation for I:

\(\displaystyle I=\frac{V}{R}\)

A flashlight bulb is an example of a resistor with the specific task to emit light when it's hot enough.

The potential difference (or voltage) is V=6 V and the resistance is R=8Ω, thus the current is:

\(\displaystyle I=\frac{6~V}{8~\Omega}\)

I = 0.75 Amp

The Balmer series is a set of emission spectral lines of the hydrogen atom that results from electron transitions from the n = 3 state to the n = 2 state.

The wavelengths of the first five lines of the Balmer series can be calculated using the Rydberg formula.

The formula can be written as:

1/λ = R(1/4 − 1/n²)

where,

R is the Rydberg constant,

n is the principal quantum number of the higher energy level,

λ is the wavelength of the emitted photon.

The first five lines of the Balmer series have n values of 3, 4, 5, 6, and 7.

Plugging these values into the Rydberg formula gives the following wavelengths:

Line 1 (n = 3 → 2): λ = 656.3 nm

Line 2 (n = 4 → 2): λ = 486.1 nm

Line 3 (n = 5 → 2): λ = 434.0 nm

Line 4 (n = 6 → 2): λ = 410.2 nm

Line 5 (n = 7 → 2): λ = 397.0 nm

The wavelengths of the first five lines of the Balmer series are in the visible part of the electromagnetic spectrum.

The wavelengths range from 656.3 nm (red) to 397.0 nm (violet).

Therefore, the first five lines of the Balmer series are part of the visible spectrum.

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Answer:

The energy changes

Explanation:

When an non-conservative force (for example friction, air resistance, applied force) does work on an object, the total mechanical energy (Ek+Ep) of that object changes. If positive work is done, then the object will gain energy. If negative work is done, then the object will lose energy.

For an organ pipe that is closed at one end and is 151 cm long:

Part A:

Fundamental frequency (first harmonic) = (speed of sound) / (2 x length of pipe)
= 343 / (2 x 1.51)
= 113.91 Hz

First overtone (second harmonic) = 3 x fundamental frequency
= 3 x 113.91
= 341.73 Hz

Second overtone (third harmonic) = 5 x fundamental frequency
= 5 x 113.91
= 569.55 Hz

Third overtone (fourth harmonic) = 7 x fundamental frequency
= 7 x 113.91
= 797.37 Hz


For an organ pipe that is open at both ends and is 151 cm long:

Fundamental frequency (first harmonic) = (speed of sound) / (2 x length of pipe)
= 343 / (2 x 1.51)
= 113.91 Hz

First overtone (second harmonic) = 2 x fundamental frequency
= 2 x 113.91
= 227.82 Hz

Second overtone (third harmonic) = 3 x fundamental frequency
= 3 x 113.91
= 341.73 Hz

Third overtone (fourth harmonic) = 4 x fundamental frequency
= 4 x 113.91
= 455.64 Hz

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The fundamental frequency (first harmonic) of a closed-end pipe is given by:

f1 = v/4L

where v is the speed of sound in air and L is the length of the pipe.

For a closed-end pipe with L = 151 cm and v = 343 m/s, we have:

f1 = 343/(4 x 151/100) = 571 Hz

The frequency of the first overtone (second harmonic) is:

f2 = 2f1 = 2 x 571 = 1142 Hz

The frequency of the second overtone (third harmonic) is:

f3 = 3f1 = 3 x 571 = 1713 Hz

The frequency of the third overtone (fourth harmonic) is:

f4 = 4f1 = 4 x 571 = 2284 Hz

For an open-end pipe, the fundamental frequency is given by:

f1 = v/2L

where L is the length of the pipe.

For an open-end pipe with L = 151 cm and v = 343 m/s, we have:

f1 = 343/(2 x 151/100) = 1136 Hz

The frequency of the first overtone (second harmonic) is:

f2 = 2f1 = 2 x 1136 = 2272 Hz

The frequency of the second overtone (third harmonic) is:

f3 = 3f1 = 3 x 1136 = 3408 Hz

The frequency of the third overtone (fourth harmonic) is:

f4 = 4f1 = 4 x 1136 = 4544 Hz

Therefore, for a closed-end pipe with a length of 151 cm, the fundamental frequency is 571 Hz, and the first three overtones are 1142 Hz, 1713 Hz, and 2284 Hz.

For an open-end pipe with a length of 151 cm, the fundamental frequency is 1136 Hz, and the first three overtones are 2272 Hz, 3408 Hz, and 4544 Hz.

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The emission of the light waves in the lasers allows them to overlap properly to create larger waves, which means that identical parts of the two waves overlap.

One of the characteristics of waves is interference, which happens when two waves travelling across the same medium interact or collide. Therefore, interference of waves occurs when identical portions of two waves cross one other.

Overlap of waves can occur in two ways, a constructive or destructive interference might emerge from two similar waves overlapping. When identical waves with comparable phase and frequency interact or collide, a new wave with a bigger amplitude is produced. This is known as constructive interference.

When two waves overlap, destructive interference happens because the resulting wave's amplitude is reduced.

In the case of laser, in which radiations get amplified, we get constructive interference which is only possible when the identical parts of the two waves overlap

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Compared to red light, blue light has higher energy photons. This is because the energy of a photon is directly proportional to its frequency, and blue light has a higher frequency than red light.

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The science of "statics" is defined option a- by zero acceleration.

Statics is a branch of mechanics that deals with the analysis of forces and their effects on objects that are either at rest or moving at a constant velocity. In statics, the focus is on the equilibrium of forces, which means that the net force acting on an object is zero.

This leads to the definition of statics as the branch of mechanics that deals with zero acceleration. In other words, if an object is at rest or moving at a constant velocity, then the net force acting on it must be zero. This is a fundamental principle of statics, and it is used to analyze a wide range of problems, from the stability of structures to the behavior of fluids. The origins of statics can be traced back to ancient Greece, but it was developed further during the Enlightenment period in Europe, particularly by scientists such as Galileo and Newton. Therefore correct option is A.

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The maximum height above the platform reached by the box before it begins to fall is 1.5 m.

The given parameters:

The maximum height above the platform reached by the box before it begins to fall is calculated as follows;

\(mgh = E\\\\h = \frac{E}{mg} \\\\h = \frac{14.7}{1 \times 9.8} \\\\h = 1.5 \ m\)

Thus, the maximum height above the platform reached by the box before it begins to fall is 1.5 m.

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Answer:

Sh = Vh t         horizontal distance traveled

Sh = 10.2 m/s * 3.7 s = 37.74 m

Answer:

Wear a mask and keep a solid 6 feet of social distance

Explanation:

Answer:

Be polite, wear a mask, social distance, don't eat sloppy, have a good time lol

Explanation:

Both the direction and the speed of an object's motion must be included when describing motion. You also have to reveal its location at a specific time.

Position, direction, speed, and acceleration are used to characterise an object's motion. Motion is the gradual alteration of a body's position or orientation. Translational motion is defined as the movement of an object along a line or a curve.

Scalars or vectors are the two types of variables that are typically employed to describe motion. A quantity whose magnitude and direction may both be used to fully describe it is referred to as a vector. Any quantity whose magnitude alone can adequately explain it is referred to as a scalar.

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Answer:

Zero I think I'm not sure

11.The time at 75° East longitude would be 1 hour and 20 minutes behind. 12.The time at 135° degrees East longitude would be 4 hours ahead. and 13. the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM.

At 2:00 AM at 90° East longitude, the time at 75° East longitude would be 1 hour and 20 minutes behind. This is because for every 15 degrees of longitude, there is a time difference of approximately 1 hour. Since the two longitudes in question have a difference of 15 degrees, we can divide this by 15 to calculate the time difference.

If it is 8:00 PM at 15° East longitude, the time at 135° East longitude would be 4 hours ahead. Similarly, for every 15 degrees of longitude, there is an approximate time difference of 1 hour. Since the two longitudes in question have a difference of 120 degrees, we can divide this by 15 to calculate the time difference.

There is a 7-hour difference** between 105° West longitude and the Prime Meridian (0° longitude). The Prime Meridian, passing through Greenwich, England, serves as the reference point for determining time zones. As one moves westward from the Prime Meridian, each 15 degrees of longitude corresponds to a time difference of approximately 1 hour. Therefore, the time at 105° West longitude would be 7 hours behind the time at the Prime Meridian.

If it is 9:30 AM in New York (41° North latitude, 75° West longitude), the time in Lima, Peru (15° South latitude, 75° West longitude) would also be 9:30 AM. The latitude does not affect the time difference between the two locations. However, since both locations have the same longitude (75° West), they would experience the same local time. The time difference between different latitudes is primarily significant for determining time zones rather than the actual time within a specific time zone.

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Answer:

Ekaryote cells

an organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus. Eukaryotes include all living organisms other than the eubacteria and archaea.

prokaryote cells

microscopic single-celled organism which has neither a distinct nucleus with a membrane nor other specialized organelles, including the bacteria and cyanobacteria

Answer:

When the motion of an object changes, the forces are unbalanced. Balanced forces are equal in size and opposite in direction. When forces are balanced, there is no change in motion.

Explanation:

Proper positioning of the welder is essential for safe and effective hand cutting. Here's a description of the correct positioning technique.

When hand cutting, the welder should follow these positioning guidelines:

Stance: Stand with a stable and balanced stance, keeping feet shoulder-width apart. Distribute weight evenly to ensure stability during the cutting process.

Body Position: Position your body perpendicular to the workpiece, facing the direction of the cut. Maintain a comfortable and relaxed posture to minimize fatigue.

Hand Placement: Hold the cutting torch with both hands, gripping it firmly but not excessively tight. Place the non-dominant hand near the base of the torch handle for support and control. The dominant hand should be positioned near the cutting trigger.

Arm Alignment: Keep your arms slightly bent to maintain flexibility and control. Align the torch in a straight line with the cut, ensuring that the torch remains perpendicular to the workpiece.

Torch Angle: Hold the cutting torch at a 90-degree angle to the workpiece's surface. This angle allows for optimal gas flow and efficient cutting.

Distance: Maintain a consistent distance between the tip of the cutting torch and the workpiece. The recommended distance is typically around 1/8 to 1/4 inch, depending on the material being cut.

Travel Speed: Move the torch steadily and smoothly along the desired cutting path. Avoid moving too fast or too slow, as it can affect the quality of the cut.

Personal Protective Equipment (PPE): Always wear appropriate PPE, including a welding helmet with a shade suitable for cutting, safety glasses, flame-resistant clothing, gloves, and boots.

Remember, proper training and experience are crucial for safe and effective hand cutting. Always follow the manufacturer's instructions and recommended practices for your specific cutting equipment.

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Answer:

neutralization reaction

Explanation:

The reaction of an acid with a base is called a neutralization reaction.

es una reacción química que ocurre entre un ácido y una base produciendo sal y agua. ... Se mezcla un ácido fuerte con una base fuerte: Cuando esto sucede, la especie que quedará en disolución será la que esté en mayor cantidad respecto de la otra.

The boundary conditions have a positive effect on the finite difference formulation of interior nodes of the medium. Boundary conditions provide constraints or information at the edges of a computational domain to determine the behavior of the system. In the finite difference method, the values at the boundary nodes are usually known or specified. By incorporating these boundary conditions into the formulation, the behavior of the system is better represented.

When the boundary conditions are properly applied, they help ensure that the finite difference scheme accurately captures the desired physics within the interior nodes. This positive effect allows for more accurate and reliable simulations, as the behavior at the boundaries influences the behavior of the entire system. Boundary conditions have a positive effect on the finite difference formulation of interior nodes. By incorporating the known or specified conditions at the boundaries, the accuracy and reliability of the finite difference method are improved, allowing for a more faithful representation of the desired physics within the system.

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Answer:

The phenomenon that fits the description of going up and down continuously, getting larger as it spreads out, and retaining the same amount of joules until fully converted to heat and mechanical energy is a wave.

Explanation:

Waves exhibit a repetitive oscillation or vibration that can propagate through various mediums such as air, water, or solids. As a wave travels, it undergoes a pattern of upward and downward movement, referred to as oscillation or displacement.

The concept of spreading out refers to the wave's behavior of expanding or dispersing as it propagates through space. This can be observed in phenomena like sound waves spreading out in all directions or waves on the surface of water expanding outward.

Regarding the conservation of energy, waves typically conserve the total energy content while undergoing various transformations. In the case of waves, the energy carried by the wave remains constant, but it may change its form as the wave interacts with its surroundings. Ultimately, when the wave is fully converted to heat and mechanical energy, the total amount of energy remains the same.

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There is posetive correlation between one's level of cognitive anxiety and somatic anxiety.

Correlation is a statistical of the  measure that is expresses  the extent to the  which two variables are the  linearly related (meaning they change together at its  constant rate). It's a common tool for describing simple relationships without making a statement about cause and effect.

An individual with higher of the  trait anxiety score tends to the   higher state anxiety score. Scores of state anxiety are rated high in the  circumstances where an individual feels the situation to be threatening irrespective of the objective danger.

It means the higher the level  of the somatic or cognitive anxiety experience by the  athletes, the lower sport to  performance. The relationship between somatic and cognitive anxiety was explained best in Multidimensional Anxiety Theory. This theory explains by  that both cognitive and somatic anxiety effect performance.

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True. When a muscle contracts, the actin myofilaments slide past the myosin myofilaments.

This process, called cross-bridge formation, is the basis of skeletal muscle contraction. It occurs when myosin heads bind to actin filaments and create tension, which causes the actin filaments to slide past the myosin filaments and shortens the muscle. The energy for this process is provided by adenosine triphosphate (ATP). Cross-bridge formation is a continuous cycle of the myosin head binding to the actin filament, pulling the filament forward, and then releasing the filament in order to bind to a new site. As this cycle is repeated, the muscle fibers contract.  

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None of these answers are correct...

Applying the law of universal gravitation, we have

F = G m₁ m₂ / R²

where

G = 6.67 × 10⁻¹¹ N•m²/kg²

m₁ = 1.7 × 10³⁰ kg

m₂ = 5.5 × 10²⁰ kg

R = 2 × 10⁵ m

→   F = (6.67 × 1.7 × 5.5)/2² × 10⁻¹¹⁺³⁰⁺²⁰⁻¹⁰ N

→   F ≈ 15.59 × 10²⁹ N

→   F ≈ 1.6 × 10³⁰ N

Answer:

40watts

Explanation:

Given parameters:

Work done  = 3000J

Time  = 75s

Unknown:

Power generated  = ?

Solution:

Power is the rate at which work is done;

       Power = \(\frac{work done}{time}\)

 Now, insert the parameters and solve;

     Power = \(\frac{3000}{75}\)   = 40watts