Kato is out camping with his family, and they decide to start a campfire because of the cold air. After everyone roasts marshmallows to a crispy golden brown, they eat them, and then they decide to go to sleep. Before going to sleep, Kato pours water over the campfire to put it out. He notices that steam drifts from the burned wood and ashes even though the fire is gone and the coals have stopped glowing.

Which statements best describe how energy is conserved in this scenario?

Select all that apply.

Answer:

−102 N

Explanation:

Hope this helps.

The required electric field is  9.58 × 10⁻² N/C

We know that the electric field, E is a product of resistivity and current density

∴ E=jρ ......(i)

Where ρ⇒ Resistivity

j ⇒ Current density

j = I/A

Now, as per the question,

Resistivity of copper, ρ = 1.68  × 10⁻⁸ Ωm

Current, I = 30 ampere

Diameter = 0.259 cm = 0.00259 m

So, Radius, r = Diameter/2

                = 1.295 × 10 ⁻⁴m

Now, Cross-sectional area, A = πr²

                                                 = 3.14 × (0.001295)²

                                                 = 5.26 × 10⁻⁶ m²

Putting the values in equation (i), we get:

[tex]E = 1.68 \times 10^{-8} \times\frac{30}{5.26 \times 10^{-6} }[/tex]

[tex]E= 9.58 \times 10^{-2} N/C[/tex]

Therefore, the required electric field is 9.58 × 10⁻² N/C

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The acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.

If the same force is used to move all four masses, they will experience the same different accelerations since their masses differ.

According to Newton's second law, the greater the force used to throw the ball, the greater the ball's acceleration.

If forces, F, are equal, the acceleration of the wagons should be different.

If force, F, is the same for both cars, then you know the mass of Car A is less than the mass of Car B.

To move the wagons at the same speed you must use a much greater force, F on the bottom wagon because it has a greater overall mass.

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

Therefore, the greater the mass of an object, the greater will be the force required to produce the acceleration as in an object of smaller mass.

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The maximum height reached by the apple thrown with an initial velocity of 8.50 m / s at 72° is 6.65 m

H = u² sin²θ / g

H = Maximum height

u = Initial velocity

g = Acceleration due to gravity

u = 8.5 m / s

g = 9.8 m / s²

θ = 72°

H = 8.5² sin² ( 72° ) / 9.8

H = 72.25 * 0.9 / 9.8

H = 6.65 m

If an object is thrown with an initial velocity at angle with the ground, it will move in a projectile motion. The object thrown is called as a projectile.

Therefore, the maximum height reached by the apple is 6.65 m

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Answer:

Explanation:

Young's modulus is the property of the material and it does not depend upon the length or the area of the cross-section.
Hence, The most correct answer will be option (iii) but youngs modulus also depends upon the nature of the matter if you have to answer multiple option then (iii) and (iv) both are correct. If you have to answer only single option then go for option (iii).

Explanation:

what does kinetic theory of matter state

According to Hooke's law, the applied force F equals the displacement or change in length x multiplied by a constant k, or F = kx. The value of k is determined not only by the elastic material, but also by its dimensions and shape.

When a physical force presses inward on an object, compression force causes it to become compacted (or compressive force). During this process, the relative positions of the object's atoms and molecules change.

F = P/A is the compressive strength formula, where F is the compressive strength (MPa) P=The maximum load (or load until failure) of the material (N) A=A cross section of the load-bearing material's area (mm2).

When the force of compression exceeds an object's ability to withstand it, buckling occurs.

The relationship between force and a measurable property of the objects involved is expressed by a force law. Some interactions can be described by force laws, while others cannot.

There are forces that do not change significantly from one instant to the next and are referred to as constant in time and constant in space.

Hence, Hooke's law states that the applied force F equals the displacement or length change x multiplied by a constant k, or F = kx. The value of k is determined not only by the type of elastic material in question, but also by the temperature.

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The time it takes to travel 2.5cm from its mean position is 1.048 secs.

When there is no net force exerted on the body, it is in the mean position, sometimes referred to as the equilibrium position. An oscillating particle's phase: This shows how the particle is vibrating right now.

Given,

case(1), V1=4ms−1,y1=3m,

case(II), V2=3ms−1,y2=4m.

We know that, V=ω√( a^2−y^2 )

Case (I) 4=ω√(a^2−3^2)..(i)

Case(II) 3=ω√(a^2−4^2) …(ii)

Dividing (i) by (ii) , we get

16a^2−256=9a^2−81

After solving we get,

a=√25 =5m

Substituting it in (i), we get

ω= 4 / 4 = 1 rads^−1

When the particle is 2.5 meters from the extreme location, its distance from the mean position is given by the equation x = 5−2.5 = 2.5m.

Given that SHM must note the time from an extreme point, we will apply the relation:

x=acosωt.

2.5= 5cos 1 × t = 5 cos t

=> cost = 2.5/5 = 1/2 = cos ( [tex]\pi[/tex]/3 )

=> t =  [tex]\pi[/tex] / 3 = 22 /7 x 3 = 1.048 secs

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The answer is 2 because the Hydrogen atom on the right needs 2 to balance with the one on the left

The work energy of speed is

1304.2 .

What is work energy?

work energy is the most fundamental quantity of physics . Work is said to be done when a force applied to an object cause a displacement of a object.

Solution -

As per the given-

Mass of runner m = 74kg

Initial velocity of runner u=4.8 m/s

Final velocity of runner v =0

Coefficient of friction ¥=0.7

Let's d be the distance moved by runner till the stop.

a- mechanical energy lost due to friction

As friction does negetive work causing the runner to stop.

As we know,

Mechanical energy lost= Kinetic energy of runner

Mechanical energy lost =

1/2 mv^2 = 1/2 ×74×4.8^2=852.2

Distance move by runner-

Work done by friction = mechanical energy lost

-¥×mg×d =852.2 j

-0.7×74×9.8×d = -491.2

Solving the equation we get

1304.2.

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The most likely thing that happened in the sediment layer 5 is that A. The massive volcano erupted, causing global warming and lava flow, which in turn caused mass extinction.

The element iridium is only present in asteroids and other outer space objects. The amount of iridium present in various Earthly sediment layers is depicted an divided into 17 portions to illustrate the passage of time.

Iridium is a plentiful element in outer space, especially in asteroids. The Alvarez Hypothesis provides support for this response. The most potent nuclear bomb ever exploded only released a fraction of the energy that a large asteroid that struck the earth would have.

Global flames caused by this heat made the earth completely dark.

The creation of a dust cloud was the cause of this obscurity. The lack of sunshine also caused the vegetation to disappear, which in turn led to a global extinction.

In conclusion, the correct option is A.

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The resultant of the two displacements 2m at 30⁰ and 4m

at 120⁰ is 93.4 degree.

Displacement is the process of removing something from its usual location or position and substituting another object in that space.

Given: The sum of the displacements at 30 degrees and 120 degrees, respectively, is 2 meters.

Currently, there are two displacements, which

R1 = 2 cos 30 – 4 cos 60

    = 2 x √3 / 2 – 4 x  1 / 2

    =  √3 - 2

    =  1.732 - 2

   = - 0.268 m

R2 = 2 sin 30 + 4 sin 60

   = 2 x 1/2 + 4 x √3 / 2

   = 1 + 2 √3

  = 1 + 2 (1.732)

  =  1 + 3.464

   = 4.464 m

Now R = √R 1^2 + R2^2

           = √(-0.268)^2 + (4.464)^2

            = √0.0718 + 19.927

             = √19.999

             = 4.472 m

Now tan Q = R 2 / R1

                   = 4.464 / - 0.268

                     = - 16.656

          Or Q = - 86.6 degree

Now the outcome will be 180 – 86.6 = 93.4 degree

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Answer:

the inertia of an object

P waves are first to occur during an earthquake.

There are two types of earthquake waves based on the medium of travel.

1.Body waves- these waves travel through the solid part of earth crust.

2.Surface waves- these waves travel on earth's surface.

Body waves are divided into two types of waves i.e., P waves (primary) and S waves (secondary).

1.P waves (primary waves)- these are the fastest seismic waves which travel through the earth crust. P waves are the first waves to reach any location when an earthquake occurs.

2.S waves (Secondary waves)- these waves are second fastest waves after primary waves to reach a location when the earthquake occurs. S waves have half speed than that of P waves.

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Wind tends to blow from over the water to over the land on a sunny day because air over the water is cooler than air over the land is, the wind is caused by differences in density and the cool, dense air from over the water flows toward the land, pushing warm air upward. Making option A, C, and D the right answer to the question.

What is sea breeze?

The phenomenon where wind tends to blow from over the water to over the land on a sunny day is referred to as sea breeze.

The heat from the sun heats up the faster than water. Subsequently, air over land heats up faster than air over water, thus air above land becomes lighter causing the pressure to decrease.

In summary, Option B is wrong because the air above the land has a lesser density compared to the air above the water, and this is due to the characteristics of the wind blowing from a higher pressure area to a lower pressure area.

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Answer:

9Ms correct answer ???????????//?

Robots use cameras, microphones, and other sensors as inputs; outputs can be as complex as exploring damaged nuclear reactors to as simple as taking a photo.

This is referred to as a machine which in most cases resembles a human being and it is involved in the execution of complex tasks in an automated manner such as lifting an object etc.It is usually controlled using a computer and employs the use of input devices such as cameras, microphones etc which ensures adequate and an easy execution of the tasks.

The output is also usually complex and the comparison is with that of a damaged nuclear reactors and this technological innovation has been useful in different facets of life due to the ease of performing activities it brings.

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The question is:

The functions of robots, cameras, microphones, and other sensors as inputs include:

Thomas Young did the experiments with light , known as the double-slit experiments, to produce interference patterns that could only be explained by evoking a wave-like nature for light.

What is the double-slit experiment?

Thomas Young an English physicist, was the first to perform the double slit experiments. The experiment involved passing light through two tiny slits, thereby producing an interference pattern that could not be reconciled with the corpuscular view of light. Thus, the findings of Thomas Young supported the hypothesis that light consists of waves rather than particles.

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Answer:

d

Explanation:

The crash in which the puck experience a stronger force is Crash 2 because the force on the purple paddle was stronger in this crash, so the force on the puck was also stronger. That is option B.

Force is defined as the pull or a push that is experienced by an object when it passes through a distance.

According to Newton's second law of motion that states that the force on an object is equal to its mass times its acceleration.

Therefore, force can also be defined as the product of mass and acceleration. That is, F = mass× acceleration.

This shows that force is directly proportional to mass. Therefore increase in the mass of an object will require more force to bring about its movement.

Therefore, the purple paddle has a greater mass with a stronger force leading to a stronger crash.

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Complete question's options:

The puck did not experience a force; only the paddles experienced a force in the crashes.

Crash 2; the force on the purple paddle was stronger in this crash, so the force on the puck was also stronger.

The diagram doesn’t tell you anything about the force on the puck. It only gives information about the force on the paddles.

The puck experienced the same force in both crashes. The paddles changed speed by the same amount in each crash, so the force on the puck was the same each time.

Proton has positive charge whereas neutron has no charge.

Proton is a type of subatomic particle that has a positive charge whereas Neutron is a type of subatomic particle that has no charge.

An atom that has lost one or more number of electrons is known as anion.

Isotopes is defined as an element that have the same number of protons i.e. atomic number but different numbers of neutrons i.e. mass number.

Electron is located outside the nucleus of an atom.

Fluorine is that atom which has 9 number of protons so its atomic number is 9.

Atomic number is related to the number of particles in the nucleus of an atom because in the nucleus, proton is present which shows the atomic number of an atom.

There are three parts of an atom i.e. proton, electron and neutron.

The size of electron is about 2 × 10⁻¹⁰ cm, The size of proton is about 0.84×10⁻¹³ cm and the size of neutron is about 1.7×10⁻¹⁵ meters

Electron has negative charge, proton has positive charge and neutron has no charge.

Yes, we can tell about the element if we know about the charge and the number of electrons in it because different atoms has particular number of electrons.

The diameter of a nucleus in scientific notation is 1.6 x 10⁻¹⁵.

The mass of hydrogen atom in whole number is 0.00000000000000000000000000167.

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The average force of the beam expert is 648,365.

The force delivered to a body traveling at a specific speed for a specific amount of time is known as the average force. Since it possesses both momentum and direction, it is primarily a vector quantity. It differs between momentum and net force.

Average force is the force exerted by a body moving at a specific speed for a specific amount of time.

mass of pile driver (m) = 1900 kg

distance of pile driver to steel beam (s) = 4.80m

depth of steel driven (d) = 13.4= 0.134 m

acceleration due to gravity (g0 = 9.8 m/s^{2}

calculate the average force exerted on the pile driver by the beam.

from work done = force x distance

work done = change in potential energy of the pile driver

equating the two equations above we have

              force x distance = m x g x (s - d)

             f x 0.134= 1900 x 9.8 x (4.80- (-0.134))

             d = - 0.134because the steel beam went down at we are taking its  

             initial position to be an origin point which is 0

             f = ( 1900x 9.8 x (4.80- (-0.134)) ) ÷ 0.134

=648,365

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if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.

If an object is moving straight vertically, the acceleration is constant along its trajectory, either it moves upward or downward. It is the velocity that changes.

If the object is moving upward, the velocity decreases, until at the top position, the velocity is equal to zero. The acceleration is constant and it is equal to g, the gravitational acceleration.

v(t) = vo - gt

Where:

v(t) is the velocity at time t

vo is the initial velocity

If the object is moving downward, the velocity increases. Again, the acceleration is constant and it is equal to g, the gravitational acceleration.

v(t) = vo + gt

This situation is depicted on the attaches picture.

Hence, if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.

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It takes 13.22 m/s as the horizontal velocity with which the kid throw the doll and the doll takes 3.77 seconds to hit the ground.

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The mass m2 for which block m1 moves up the plane at constant speed once it is set in motion is:

                      m2 = m1 (sinα + μkcosα)

The tension in the cord should be [tex]m_{2}[/tex]g so the that the hanging block over a frictionless pulley  can move at constant speed. This tension in the cord should the component of gravitational force and the force of friction.

Now

[tex]m_{2}[/tex]g = ([tex]m_{1}[/tex]g(sinα) +μk([tex]m_{1}[/tex]g)cosα)

[tex]m_{2}[/tex]g = [tex]m_{1}[/tex]g(sinα +μkcosα)

[tex]m_{2}[/tex]  = [tex]m_{1}[/tex] (sinα + μkcosα)

So the mass [tex]m_{2}[/tex]  for which m1 moves up the plane at constant speed once it is set in motion is:

                        m2 = m1 (sinα + μkcosα)

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So, the work required to lift the piano is 36 kJ from the ground.

An item needs to receive energy in order to move. Force is one way that energy may be transferred. Work or work done refers to the quantity of energy used by a force to move an item.

Transferring energy into an item to cause some displacement is what is referred to as work. The ability to perform tasks is referred to as energy. The work is consistently the same. Kinetic and potential energy are two examples of the various forms of energy.

The quantity of internal and mechanical energy that things contain fluctuates as a result of work. Energy is contributed to a system or an item when work is done on it. When a system or thing performs labour,

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A moving object's speed and direction vary over time at a certain rate, which is known as acceleration. The term "acceleration" refers to the change in speed of a point or object along a straight line. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant.

Velocity is measured by a specific unit of time and from a specific point of view, and it describes the rate at which an object's orientation changes while it is moving.

The term "Distance Traveled" describes how far an object has travelled during a specified amount of time to get to its destination. Or The path that a body takes to travel a specific distance at a certain speed from one location to another is known as the distance travelled.

Using,

Avg. acceleration (a) = (final velocity - initial velocity(v_i)) / time (t)

time = 6500 / 389 = 16.71 sec

Now, the following equation can be used to determine distance from acceleration: D = v*t + 1/2*a*t². where an is the acceleration, t is the passage of time, and v is the velocity.

D = distance travelled = 54309 m

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Force is the product of mass and acceleration, the magnitude of the net force exerted on the frog as it leaps is 3.6 N

Force can be simply defined as a pull or push. It is the product of mass and acceleration. And it is measured in Newton.

Given that a 1.20-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 3.0 m/s² . The magnitude of the net force exerted on the frog as it leaps will be

F = ma

Where

Substitute the two parameters into the formula.

F = 1.2 × 3

F = 3.6 N

Therefore, the magnitude of the net force exerted on the frog as it leaps is 3.6 N

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