a) Fill in the blanks in the following paragraph to correctly describe the nucleus of an atom.
_______ and _________ are the two types of nucleons that make up a nucleus. The __________ force exists between _________ in the nucleus because of their charge. Because it is repulsive, this force tends to make a nucleus __________. However, the __________ force acts between protons, between neutrons, and between protons and neutrons. This force helps to make a nucleus __________, because it is always attractive.

Answer:

5 m/s

Explanation:

We are given that 9000 kg of water flows through the pipe in 1 minute. Mass flow rate = mass/time

So, mass flow rate = 9000 kg / 1 minute = 150 kg/s

We know the cross sectional area of the pipe is 0.3 m2. From continuity equation, mass flow rate = density * area * velocity

So, 150 = 1000 * 0.3 * v (Density of water is approximately 1000 kg/m3)

Solving for v (velocity):

v = 150/(1000*0.3) = 5 m/s

Therefore, the speed of water in the pipe is 5 m/s.

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer:

false

Explanation:

Answer:

It's False

Explanation:

For Example, Suppose, we have two wires of equal length and the same cross sectional, one made up of nichrome and the other made up of copper metal. Then, nichrome wire will have more resistance than the copper wire.

First copper is an element and nichrome is an alloy primarily of nickel, chromium and iron. So that's the first clue noting that the three elements that make up this alloy have a smaller conductivity than copper.

But there's more to the reason for higher resistance. The manner in which the three elements make up the nichrome alloy results in grain boundaries, dislocations and voids that interrupt the crystal lattice of the alloy which for pure copper is much more uniform. These differences of the crystal lattices either allow smooth flow of electrons as in copper or scattering as in nichrome. Scattering is the dominant effect that leads to the higher resistance, combined with the basic differences in constituent conductivities.

I Hope This Helps.

Answer:

2.5 m/s^2

Explanation:

Given the following data;

Force = 80N

Mass = 32kg

To find acceleration;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

\(Acceleration (a) = \frac{F}{m}\)

Substituting into the equation;

\(Acceleration (a) = \frac{80}{32}\)

Acceleration = 2.5m/s²

Explanation:

Given:

Diameter = 200 m

Radius, r = 200/2 = 100 m

Time taken, t = 30 seconds

Formula to be used:

Distance traveled, = circumference of circle = 2πr

Answer:

Putting all the values, we get

Distance traveled = 2πr

So, the distance traveled by Raju is 628.57 m.

Now, magnitude of the displacement,

At the end of 30 seconds, Raju will come to starting position or initial position, so displacement is zero.

A plant sits on a bookshelf. The diagram of the forces acting on the plant is the normal force in the upward vertical direction and the gravitational force in the downward direction.

A force is regarded as a push or pull. In the equilibrium of forces, the sum total of forces acting on a given object with constant mass is equal to the product of the mass of the object and its acceleration.

The sum of the forces can also be measured and resolve into vertical components and horizontal components.

Some of the factors that can affect forces depend on the following;

From the free-body attached diagram below, we can conclude that the plant sitting on the bookshelf is the normal force in the upward vertical direction and the gravitational force in the downward direction.

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Given,

The height from which the object was dropped, h=100 m

The speed of the object, v=25 m/s

The acceleration due to gravity, g=9.8 m/s²

The object will have only potential energy when it is at rest at the height of 100 m. As the object falls it will slowly lose its potential energy. The potential energy thus lost will be converted into the kinetic energy of the object.

Thus the potential energy lost by the object when it has a speed of 25 m/s will be equal to its kinetic energy at that instant.

Therefore,

Where Δh is the change in the height of the object or the height through which the object has fallen at that instant.

On substituting the known values,

Thus the height of the object above ground is,

Thus the height of the object above the ground when it has a speed of 25 m/s is 68.11. m

The statements that accurately describe sound waves are:

2,3,4,6

1. Sound waves require a medium to transfer energy. Unlike electromagnetic waves, such as light, sound waves cannot propagate through a vacuum. They need a material medium, such as air, water, or solids, to transfer their energy.

2. Sound is heard when a vibration strikes the ear. Sound is a mechanical wave that is produced by vibrations or oscillations of objects. When these vibrations reach our ears, they are detected by the auditory system, which allows us to perceive sound.

3. When particles of a medium interact, part of the wave's energy is lost. Sound waves experience energy losses due to factors like friction, absorption, and scattering. As the wave propagates through a medium, some of its energy is converted into other forms, such as heat, resulting in a decrease in the wave's intensity.

4. A wave's energy can be distinguished from other movements of the medium. Sound waves carry energy in the form of vibrations or oscillations of particles within a medium. These movements are distinct from other random or uncorrelated motions of the medium's particles that do not contribute to the propagation of the sound wave.

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true

Explanation:

computers have become a need in many businesses and homes we now living in a era of technology a computer is now a neccecity

The statement is True.

Personal computers have become an essential fixture in most businesses and households.

They have revolutionized the way we work, communicate, access information, and perform various tasks.

In the business world, personal computers are ubiquitous, serving as indispensable tools for productivity, data management, communication, and decision-making.

From small businesses to large corporations, computers have streamlined operations and enhanced efficiency.

Similarly, in homes, personal computers have become commonplace, enabling individuals and families to connect with the world, pursue online education, engage in entertainment, and manage various aspects of their lives.

With their versatility and functionality, personal computers have become an integral part of modern life, transforming the way we live and work.

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The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at 6.0 m/s².

What is Newton's Second Law?
According to Newton's second law, an object's acceleration is determined by its mass and the net force that is acting on it. The body's acceleration is inversely related to its mass and directly proportional to the net force applied on it

According to Newton's second Law of motion the resultant force is directly proportional to the rate of change in momentum.

Therefore; F = ma , where F is the force, m is the mass and a is the acceleration

F = 4 × 3
 = 12 Newtons
The same force acts on a 2.0 kg object
F = ma
a = F/ m
 = 12 /2
 = 6.0 m/s²

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ANSWER AND EXPLAINATION:
To calculate the impulse imparted on the baseball, we can use the impulse-momentum principle, which states that the impulse experienced by an object is equal to the change in momentum of the object. Mathematically, it can be expressed as:

Impulse = Change in momentum

The momentum of an object is given by the product of its mass and velocity:

Momentum = mass × velocity

In this case, the baseball has an initial mass of 0.14 kg and an initial velocity of 32 m/s. After being struck by the bat, it travels in the opposite direction at a velocity of 49 m/s.

Therefore, the change in momentum is given by:

Change in momentum = (mass × final velocity) - (mass × initial velocity)

Change in momentum = mass × (final velocity - initial velocity)

Change in momentum = 0.14 kg × (49 m/s - (-32 m/s))

Change in momentum = 0.14 kg × (49 m/s + 32 m/s)

Change in momentum = 0.14 kg × 81 m/s

Change in momentum = 11.34 kg·m/s

So, the impulse imparted on the baseball is 11.34 kg·m/s.

Answer:

The low of conservation of energy states that "energy can neither be created nor be destroyed but it can be changed from one form to another".

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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The principle of conservation of momentum states that if two objects collide, then the total momentum before and after the collision will be the same if there is no external force acting on the colliding objects.

The conservation of linear momentum is a general law of physics which states that the overall momentum of a system is constant and that the quantity called momentum which characterises motion never changes in an isolated collection of objects.

For a system to have its momentum conserved, it must satisfy two conditions: During the interaction, the system's mass must not change. The objects may transmit mass to one another as they interact (apply forces to one another), but any mass one object gets is offset by the loss of that mass from another.

On the reasonable assumption that space is uniform—that is, that there is nothing in the rules of physics that prevents the conservation of linear momentum—the law of conservation of linear momentum is amply supported by experiment and can even be analytically inferred.

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Using the kinematic equation:

v = vo + at

where v is the final velocity, vo is the initial velocity (which is zero since the cotton ball is dropped), a is the acceleration, and t is the time.

At t = 1.00 s:

v = 0 + (-9.81 m/s²) (1.00 s) = -9.81 m/s

However, there is air resistance acting on the cotton ball, so the acceleration will be less than -9.81 m/s². We don't have enough information to calculate the exact acceleration, but we can eliminate choices A and B because they have an acceleration greater than -9.81 m/s².

For choice C:

v = 0 + (-4.90 m/s²) (1.00 s) = -4.90 m/s

For choice D:

v = 0 + (-4.90 m/s²) (1.00 s) = -4.90 m/s

Therefore, the correct answer is D. v = 2.55 m/s, a = 0.00 m/s².

Answer:

the cave walls reflect sound waves

Explanation:

i did the study island

(a) The ball goes up to the height of 31.89 m. (b) The ball stays for 5.1 s in the air. (c) The acceleration due to gravity and wind resistance can affect the estimation.

Acceleration owing to gravity is the term used to describe the rate at which a body's velocity changes as a result of the earth's gravitational pull. In general, it is assumed that the acceleration caused by gravity is in the downward direction.

The acceleration caused by gravity has been calculated as, however as it changes from location to location, it may have an impact on the estimation.

You may have thought that the wind has no impact, but it can actually generate drag and even cause the ball to shift course.

Therefore, (a) The ball goes up to the height of 31.89 m. (b) The ball stays for 5.1 s in the air. (c) The acceleration due to gravity and wind resistance can affect the estimation.

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Answer: the value of the drain current ID is 3.56 mA

Explanation:

Given that;

IDSS = 8 mA

VP(VGS_OFF) = - 6 V.

VGS = - 2 V

value of the drain current ID = ?

Drain current ID is expressed as;

ID = IDSS [ 1 - (VGS/VP(VGS_OFF)) ]²

we substitute our value

ID = 8 [ 1 - (-2 / -6) ]²

ID = 8 [ 1 - 0.3333 ]²

ID = 8 [ 0.6667 ]²

ID = 8 [ 0.4444 ]

ID = 3.5552 ≈ 3.56 mA

Therefore the value of the drain current ID is 3.56 mA

The vectors addition permits locating the perfect result for the sum of the two vectors in option B).  See attached and the vector is directed to the right and up.

Vector addition is the operation of adding or extra vectors together into a vector sum. The so-known as parallelogram regulation gives the rule for vector addition of or greater vectors. for two vectors and, the vector sum is received via placing them head to tail and drawing the vector from the loose tail to the unfastened head.

A vector is an amount or phenomenon that has impartial residences: importance and direction. The time period also denotes the mathematical or geometrical representation of the sort of quantity. Examples of vectors in nature are velocity, momentum, force, electromagnetic fields, and weight.

Vectors are used in technological know-how to describe something that has a direction and a magnitude. they're commonly drawn as pointed arrows, the length of which represents the vector's importance

Disclaimer: your question is incomplete, please see below for the complete question.

The image shows the complete question.

Which vector is the sum of vectors à and b?

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While certain types of glass containers may be suitable for short-term storage of vinegar, it is generally recommended to use non-reactive materials, such as plastic or stainless steel, for long-term storage to avoid any potential chemical reactions or corrosion.

Vinegar is an acidic liquid that contains acetic acid. When vinegar comes into contact with certain types of glass, particularly those made of lead or other reactive materials, a chemical reaction can occur. This reaction can lead to the leaching of potentially harmful substances into the vinegar.

Glass containers made from specific types of glass, such as soda-lime glass, are generally safe for storing vinegar.

However, it is important to note that prolonged storage or exposure to vinegar can still cause the glass to corrode over time. This can result in the deterioration of the glass container, potentially leading to breakage or the release of glass fragments.

To avoid any potential issues, it is recommended to use containers made of non-reactive materials, such as food-grade plastic or stainless steel, for long-term storage of vinegar. These materials do not react with the acidic nature of vinegar and do not pose a risk of leaching harmful substances.

Additionally, it is important to store vinegar in a cool, dark place to maintain its quality and prevent spoilage. Exposure to light and heat can degrade the quality of vinegar over time.

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Answer:

C. Thermal energy moves within the air above the flames as warmer

air rises

Explanation:

Speed and velocity are related to an object's kinetic energy, which is the energy associated with its motion.

Kinetic energy is the energy that an object has due to its motion. It is a form of energy that is associated with the motion of an object, and is calculated by multiplying the mass of the object by the square of its velocity. Kinetic energy is one of the most fundamental forms of energy, and is found in everything from the movement of atoms and molecules to the motion of planets and stars. Kinetic energy is also the energy that is associated with everyday objects, such as a ball that is thrown or a car that is moving. Kinetic energy can be converted into other forms of energy, such as heat or electricity, and can also be used to do work, such as powering a car or a machine. Kinetic energy is a crucial part of the natural world, and is necessary for many of the processes that occur in nature.

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The caps used with boomwhacker tubes alter the sound of the notes by changing the effective length of the air column inside the tube.

This modification affects the fundamental frequency produced when the tube is struck or tapped against a surface.The fundamental frequency determines the pitch of the sound we hear.

When a boomwhacker tube is struck without any cap, the air column inside vibrates at its natural frequency, producing a specific pitch. By adding caps to the tube, we effectively shorten its length, which increases the frequency of the vibrations and raises the pitch. Conversely, removing caps increases the effective length, lowering the frequency and lowering the pitch.

To visualize this, imagine a tube with a cap on one end. The cap acts as a barrier, preventing the air column from vibrating in that direction. Therefore, the effective length of the tube becomes the distance between the cap and the open end. This shorter length results in a higher pitch. Removing the cap increases the effective length, resulting in a lower pitch.By using different combinations of caps on the boomwhacker tubes, we can produce a range of pitches, creating a musical and colorful experience.

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Ben as a psychology student is most likely conducting a behavioral study.

What is psychology?

Psychology can simply be defined as the study of human mind, conscious and unconscious, thoughts and feelings.

In conclusion, Ben as a psychology student is most likely conducting a behavioral study.

Some few branches of psychology are:

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Answer: 42 N-s

Explanation: The area under the curve is equal to the impulse, so you take the area of the two triangles and add it to the area of the rectangle.

Area of a triangle: 1/2bh

Area of a rectangle: bxh

2(1/2x2x7)=14+(4x7)=42 N-s

The force of magnitude F acting in the x-direction on a 3.5 kg particle varies in time as shown in the graph given in question, the impulse of this force is 42 N-s.

The integral of a force, F, over the time period  which it acts, t, is referred to as the impulse. Impulse is a vector quantity because force is one as well. When an item receives an impulse, its linear momentum also changes in the opposite direction in an analogous vector.

S.I unit of impulse is Newton-second (Ns).

From the graph given in question area under the curve is equal to the impulse, so  take the area of the two triangles and add it to the area of the rectangle.

Area of a triangle = 1/2bh

Area of a rectangle = bxh

total area,

impulse = 2(1/2x2x7)

             = 14+(4x7)

             = 42 N-s

Impulse of the force is 42 N-s.

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Answer:

A. 1.3

Explanation:

The density is defined as

Now in our case

mass = 65g

and

volume = 50 cm^3.

Therefore, the density is

Hence, the density of the solution is 1.3 g / cm^3.

Answer:

\(COP_{Heating}\)\(= \frac{T_{H}}{T_{H}-T_{C} }\)

The temperature must be in Kelvin: \(degrees Celsius+273.15=K\).  

Explanation:

COP is similar to efficiency: \(\frac{what you get}{what you pay}\) = \(\frac{energy from hot reservoir}{work needed for energy transfer}\)

The maximum possible coefficient of performance (COP) for a heat pump is equal to 7.32.

The coefficient of performance can be described as the relationship between the power (kW) that is supplied to the compressor and the power (kW) that is drawn out of the heat pump as cooling or heat.

The coefficient of performance of a heat pump or air conditioning system is a ratio of useful heating or cooling provided to work or energy required. The COP usually exceeds 1, it pumps extra heat from a heat source to where the heat is needed.

Assume that the temperature of the hot reservoir is  \(T_H\) and the temperature of the cold reservoir is \(T_c\).

The temperature of the hot reservoir, T\(_H\) = 20° C = 20 + 273 = 293 K

The temperature of cold reservoir, \(T_C\) = -20°C = 273 -20 = 253 K

The equation of the maximum possible coefficient of performance for a heat pump is as follows:

\(COP_{max}= \frac{T_H}{T_H-T_c}\)

\(COP_{max } = \frac{293}{293-253}\)

COP = 7.32

Therefore, the maximum possible coefficient of performance for a heat pump is 7.32.

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Your question is incomplete, most probably the complete question was,

Find the maximum possible coefficient of performance for a heat pump used to heat a house in a northerly climate in winter. The inside is kept at 20°C and the outside is -20°C.

Answer:

Radius of curvature of the mirror = 250 cm

Explanation:

Given:

Object distance from mirror = 250 cm (u=-250)

Object distance appears in mirror = 250 cm (v=-250)

Find:

Radius of curvature of the mirror

Computation:

Using mirror formula

1/f = 1/v + 1/u

1/f = 1/(-250) + 1/(-250)

f = (-250/2)

f = -125 cm or 125 cm

Radius of curvature of the mirror = 2(f)

Radius of curvature of the mirror = 2(125)

Radius of curvature of the mirror = 250 cm