a pitcher throws a fastball at a batter. the batter hits the incoming 40 m/s fastball and the ball goes straight back towards the pitcher at 50 m/s after ball-on-bat contact time of 0.030 seconds. assume the flight of the ball is horizontal. neglect air friction. what is the force exerted on the 0.15 kg baseball by the bat?

Answer:

Physics is a natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.

In a BJT, the width of the base narrows as the reverse bias across the base-collector junction rises, increasing the collector current.

Base width modulation, also known as the early effect, is a change in a bipolar transistor's base width brought on by a change in the applied base-to-collector voltage. For instance, the collector-base depletion width rises with increasing reverse bias across the collector-base junction.

The base current rises with VIN, which in turn raises the collector current. At some point, the voltage drop across the collector resistor RC will be sufficient for the BC junction to start moving into the forward-bias zone.

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In order to calculate a planet's orbital period, we must know the dimensions of its orbit. The correct answer is C.

To calculate a planet's orbital period, we need to know the dimensions of its orbit, specifically the semi-major axis. The semi-major axis is the average distance between the planet and its parent star (assuming a circular or nearly circular orbit). The orbital period of a planet is determined by its distance from the star and the mass of the star.

The tilt of the planet's axis (option A) affects the planet's seasons but does not directly impact its orbital period. The radius of the planet (option B) is not directly related to its orbital period either. The velocity of the planet (option D) can vary along its orbit, but it is not sufficient on its own to calculate the orbital period. Hence the correct answer is C.

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Answer:

U = 66,150 J

Explanation:

Gravitational Potential Energy

Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.

It can be calculated with the equation:

U=m.g.h

Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or \(9.8\ m/s^2\).

The child of mass m=45 Kg is perched above a h=150 m ravine. His gravitational potential energy is:

\(U=45~Kg\cdot 9.8\ m/s^2\cdot 150\ m\)

U = 66,150 J

The two-input LUT is a very versatile logic element that can be used to implement a wide variety of functions.

a) Behavioral modeling in Verilog HDL is a high-level language that allows you to describe the behavior of a digital circuit without worrying about the underlying hardware implementation. This makes it a very effective way of describing digital circuits, as it allows you to focus on the functionality of the circuit without getting bogged down in the details of how it will be implemented.

b) The main difference between using a general-purpose processor and digital design in developing an electronic application is that a general-purpose processor is designed to be able to execute a wide variety of instructions, while digital design is specifically designed to implement a particular function. This means that a general-purpose processor may not be the most efficient way to implement a specific function, as it may require more hardware resources than a custom-designed digital circuit.

c) The four principles for effectively and quickly achieving the design are:

Regularity: The design should be as regular as possible. This means that the design should be made up of a small number of repeated units, rather than a large number of unique units.

Simplicity: The design should be as simple as possible. This means that the design should be easy to understand and implement.

Efficiency: The design should be as efficient as possible. This means that the design should use the minimum amount of hardware resources.

Verifiability: The design should be verifiable. This means that the design should be able to be checked to ensure that it meets its specifications.

The regularity principle can be explained by the following example. If you are designing a digital circuit to add two numbers, you could use a design that is made up of a small number of repeated units, such as adders and registers. This would be a more regular design than a design that used a large number of unique units, such as a custom-designed adder. A more regular design is easier to understand and implement, and it is also more likely to be efficient.

d) A two-input LUT in the FPGA implements a logic f = a b + ab by storing the truth table for the function in its memory. When the inputs to the LUT are applied, the LUT will output the corresponding value from its memory.

For example, if the inputs to the LUT are a = 0 and b = 1, the LUT will output the value 1, because the truth table for f shows that the output is 1 when a = 0 and b = 1.

The two-input LUT is a very versatile logic element that can be used to implement a wide variety of functions. It is a key building block in many FPGA designs.

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Answer:

alpha particles, beta particles, and gamma rays.

Three types of radiation that are produced during radioactivity are Alpha radiation, Beta radiation, Gamma radiation.

Alpha radiation: Alpha particles are helium nuclei consisting of two protons and two neutrons. They are positively charged and have low penetration power. Alpha radiation can be stopped by a sheet of paper or a few centimeters of air. Beta radiation: Beta particles are either high-energy electrons or positrons. They are negatively or positively charged, respectively. Beta particles have higher penetration power than alpha particles and can be stopped by a few millimeters of aluminum or plastic. Gamma radiation: Gamma rays are electromagnetic radiation similar to X-rays but with higher energy. They have no charge and are highly penetrating. Gamma rays require thicker shielding, such as several centimeters of lead or concrete, to be effectively absorbed.

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Answer:

Explanation:

The formula for acceleration is:

a = (v_f - v_i) / t

Where:

a = acceleration

v_f = final velocity

v_i = initial velocity (in this case, 0 m/s since the car started from rest)

t = time

Plugging in the given values, we get:

a = (3600 m/s - 0 m/s) / 20 s

a = 180 m/s^2

Therefore, the acceleration of the car is 180 m/s^2.

The albedo of the Earth system has been determined to be approximately 30 percent.

Albedo is the measure of the reflectivity of an object or surface. In the case of the Earth system, it refers to the amount of sunlight reflected back into space by the Earth and its atmosphere.

To calculate the albedo of the Earth, scientists measure the percentage of sunlight that is reflected by the Earth's surface, clouds, and atmosphere. The Earth's albedo can vary depending on factors such as cloud cover, surface type (land or water), and atmospheric conditions.

Various studies and satellite measurements have estimated the Earth's albedo to be around 30 percent on average. This means that approximately 30 percent of the incoming sunlight is reflected back into space, while the remaining 70 percent is absorbed by the Earth's surface, leading to warming.

The determined albedo of the Earth system is approximately 30 percent. This indicates that about 30 percent of the sunlight that reaches the Earth is reflected back into space, contributing to the overall energy balance of the planet. Understanding the Earth's albedo is crucial in climate studies and helps scientists assess the planet's energy budget and the impact of various factors on global temperature patterns.

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Answer:

\( \boxed{q = 1.2 \times {10}^{ - 6} C}\)

Explanation:

\(f_e = \frac{{q}^{2}k }{ {r}^{2} } \\ q = \sqrt{ \frac{f_e( {r}^{2} )}{k} } = \sqrt{ \frac{5.2(5 \times {10}^{ - 2} )^{2} }{9 \times {10}^{9} } } \\ q =\sqrt{ \frac{5.2(5 \times {10}^{ - 2} )^{2} }{9 \times {10}^{9} } } = \sqrt{ \frac{0.013}{9 \times {10}^{9} } } \\ q = 1.2 \times {10}^{ - 6} \)

The amount of work done against the gravitational force on a 7.8 kg briefcase when it is carried from the ground floor to the roof of the empire state building, a vertical climb of 380 m is 29095.2 joules.

To calculate the work done against the gravitational force when carrying the briefcase from the ground floor to the roof of the Empire State Building, we need to determine the change in potential energy.

The work done against gravity is given by the formula:

Work = Force × Distance

In this case, the force is the weight of the briefcase, which can be calculated using the formula:

Weight = mass × gravitational acceleration

where the gravitational acceleration on Earth is approximately 9.8 m/s².

Let's calculate the work done:

Weight = mass × gravitational acceleration

Weight = 7.8 kg × 9.8 m/s²

Weight = 76.44 N

Now we can calculate the work done:

Work = Force × Distance

Work = Weight × Distance

Work = 76.44 N × 380 m

Work ≈ 29095.2 J

Therefore, approximately 29095.2 joules of work are done against the gravitational force when carrying the 7.8 kg briefcase from the ground floor to the roof of the Empire State Building.

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Answer:

Excessive paranoia, worry, or anxiety.

Long-lasting sadness or irritability.

Extreme changes in moods.

Social withdrawal.

Dramatic changes in eating or sleeping patter

Explanation:

hope it helps brainliest if right thx :)

Answer:

2.5705594546378 mol

Explanation:

Used this calculator

http://www.endmemo.com/chem/mmass.php

Use the work formula:

W = Fd

Replacing we have:

W = 1 N * 1 m

Resolving operation:

W = 1 J

The work efectuated is 1 Joule.

Naw ur pretty accurate, heck collage is the only football worth watching most the time. Hook'um horns!

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

Grains, pasta, etc provides the body with energy in the form of carbohydrates because they're absorbed quickly by the body and used for energy.

Answer:

A

Explanation:

In a wave phenomenon, energy can move from one location to another, yet the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter.

Answer:

I will assume that “maximum force” implies the constant application of power  P  = 400 hp (international) to accelerating the vehicle. The force will therefore vary with speed as the vehicle accelerates. I will also assume that all engine energy goes into accelerating the vehicle, rather than rotating elements like its wheels.

In this case the 400 hp (equivalent to 298,280 watts) is applied for time  t  = 2 seconds. Therefore the kinetic energy of the vehicle is increased by:

ΔKE=Pt=(298,280)(2)=596,560  joules.

The initial kinetic energy is:

KEinitial=12mv2

=(0.5)(1600)(82)=51,200  joules.

Therefore final kinetic energy is:

KEfinal=KEinitial+ΔKE

=51,200+596,560

=647,760  joules

Therefore final vehicle velocity can be found:

KEfinal=12mv2

v=2KEfinalm−−−−−−−−√

=(2)(647,760)1600−−−−−−−−−−−√

= 28.455 m/s

Explanation:

To calculate the height Chandra would have to climb to offset the energy intake from the Low-Joule Cola, we need to convert the energy provided by the drink into potential energy gained from climbing stairs.

First, we'll calculate the total energy intake from the cola. The label states that 100 mL yields 1.7 kJ. Since the can contains 375 mL, the total energy intake is (1.7 kJ/100 mL) * 375 mL = 6.375 kJ.

To convert this energy into potential energy gained from climbing stairs, we can use the equation:

Potential Energy = m * g * h

Where:

m = mass (65.0 kg)

g = acceleration due to gravity (approximately 9.8 m/s^2)

h = height to be determined

Rearranging the equation to solve for h:

h = Potential Energy / (m * g)

Substituting the values:

h = 6.375 kJ / (65.0 kg * 9.8 m/s^2)

Calculating the result:

h ≈ 0.010 m or 10 cm

Therefore, Chandra would need to climb approximately 10 centimeters to offset the energy intake from drinking the Low-Joule Cola.

Chandra would have to climb approximately 10 centimeters to offset the energy intake from drinking the Low-Joule Cola, assuming she has a mass of 65.0 kg. The calculation is based on converting the energy intake from the cola into potential energy gained from climbing stairs using the formula for potential energy.

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The age of the solar system is approximately 4.6 billion years, which is not listed as one of the given options.

The correct age of the solar system is not provided among the options. Based on scientific estimates, the age of the solar system is approximately 4.6 billion years. This age is determined using various methods, including radiometric dating of meteorite samples and analysis of the formation and evolution of the Sun, planets, and other celestial bodies within the solar system.

The widely accepted age of 4.6 billion years indicates the time since the solar system's formation from a rotating disk of gas and dust known as the solar nebula.

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Answer:

La velocidad media es 5 \(\frac{km}{h}\), que equivale a 1.389 \(\frac{m}{s}\)

Explanation:

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello.

La velocidad media relaciona el cambio de la posición con el tiempo empleado en efectuar dicho cambio. Por lo que se calcula como la distancia recorrida por un objeto dividido por el tiempo transcurrido:

\(velocidad=\frac{distancia}{tiempo}\)

En este caso:

Entonces, reemplazando en la definición de velocidad media:

\(velocidad=\frac{10 km}{2 h}= \frac{10,000 m}{7,200 s}\)

Resolviendo se obtiene:

\(velocidad=5 \frac{km}{h}= 1.389\frac{m}{s}\)

La velocidad media es 5 \(\frac{km}{h}\), que equivale a 1.389 \(\frac{m}{s}\)

Fill in blank answers are- electron degeneracy pressure, nova, massive star supernova, white dwarf limit, accretion disk and white dwarf supernova

The radius of a white dwarf is determined by a balance between the inward force of gravity and the outward push of electron degeneracy pressure.

A nova occurs when hydrogen fusion ignites on the surface of a white dwarf in a binary system.

A massive star supernova occurs when fusion creates iron in the core of a star.

A white dwarf in a close binary system will explode as a supernova if it gains enough mass to exceed the white dwarf limit.

An accretion disk consists of hot, swirling gas captured by a white dwarf (or neutron star or black hole) from a binary companion star.

A white dwarf supernova can occur only in a binary system, and all such events are thought to have the same luminosity.

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The soft pedal on an upright piano serves to reduce the volume and modify the tone of the sound produced.

It achieves this by physically altering the position and action of the piano's hammers in relation to the strings, resulting in a softer and mellower sound.

When the soft pedal is pressed on an upright piano, it shifts the entire action mechanism sideways. This movement causes the hammers to strike fewer strings for each key pressed, reducing the volume of the sound produced. The hammers also come into contact with the strings in a different way, altering the tone and timbre of the notes played.

The soft pedal creates a more subdued and intimate sound, often preferred for delicate and expressive passages in piano music.

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The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.

The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].

Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.

Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).

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Answer: yes

Explanation:

yes

Answer:

A

Explanation:

the answer is A because the energy is light and heat

Answer:

i think it's, Chemical energy is transformed to light energy and heat energy.

Explanation:

i used the last brain cells i had...lol...pls mark brainliest

Given that an athlete leaves one end of a pool of length at and arrives at the other end at time . She swims back and arrives at the starting position at time . If she is swimming initially in the positive direction, we need to find her average velocities symbolically in positive and negative direction.

The formula for average velocity is: Average velocity = displacement/time taken We know that the displacement is zero because the athlete returns to the starting point. Hence, the average velocity is zero in both the positive and negative directions. Mathematically, we can write it as: v _avg = 0 (in both directions)Therefore, the average velocities symbolically in both the positive and negative directions are zero.

an athlete leaves one end of a pool of length at and arrives at the other end at time . she swims back and arrives at the starting position at time . if she is swimming initially in the positive direction, determine her average velocities symbolically in the average velocities symbolically in both the positive and negative directions are zero. If she is swimming initially in the positive direction, we need to find her average velocities symbolically in positive and negative direction.

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The statement "if a plate-and-frame filter is operated at constant flow rate, the pressure drop across it is proportional to the square root of the elapsed time" is false because it is proportional to the elapsed time itself instead.

When a plate-and-frame filter is operated at constant flow rate, the pressure drop across is not proportional to the square root of the elapsed time. Instead, it is proportional to the elapsed time itself.

In a plate-and-frame filter, fluid passes through a series of filter plates and filter frames that contain filter media, typically in the form of cloth. As the fluid flows through, particles are captured by the filter media, causing a buildup of solid material called filter cake. Over time, this filter cake accumulates, increasing the resistance to fluid flow and thus causing the pressure drop across the filter to increase.

When operated at a constant flow rate, the pressure drop (ΔP) across the filter is related to the elapsed time (t) by the following equation:

ΔP = K × t

Here, K is a constant that depends on the filter's resistance and the properties of the fluid and solid particles. This relationship shows that the pressure drop is directly proportional to the elapsed time, not its square root.

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