when these two metals are placed in contact with one another, which of the following will take place?

Answer:

The tiny object's acceleration will be much greater.

Explanation:

Because of Newton's second law of motion, (which is F=ma or Force= Mass*acceleration), then if the force maintains the same (which in this case it does, because it says 50 N to both obejcts) and  one mass was much greater than the other, then the ould be less for the more massive object and much greater for the lighter object.

For example:  If 50 N were applied to a 500 kg object and a 50 kg object, then theformulas for each (respectively) are:

50 = 500*acceleration

and

50 = 50*acceleration

(Because of Newtons Second Law of Motion)

Then, solving for the equations, we get for equation 1:

Acceleration = .1 m/s^2

And for equation 2:

Accleration = 1 m/s^2

Thus, you can see that more massive objects (when applied he same amount of force as the smaller object) clearly have less accleration than the smaller objects.

a) Heat flux on surface of filament = 238 W/m^2.  b)Heat flux = 13.7 W / 0.0201 m^2 = 682 W/m^2. c)Therefore, the savings per year for using an LED light instead of an incandescent lamp are $788.40.

A. On the surface of the filament:

The heat flux on the surface of the filament is given by the Stefan-Boltzmann law that states that a body at temperature T will emit radiation at a rate proportional to T to the power of 4.

The proportionality constant is the Stefan-Boltzmann constant, which is equal to 5.67 × 10^-8 W m^-2 K^-4.

The heat flux on the surface of the filament is given by;

σ = 5.67 x 10^-8 W/m2K4

T = temperature of filament, K

The temperature of the filament is given by P = IV where V is the voltage of the lamp, and I is the current in the filament.

Power, P = 150W, Voltage V =120VCurrent I = P/V = 150/120 = 1.25 AT = V/I (R/4)

Where R is the resistance of the filament.

To find R we use the equation;

P = V^2 / RR = (V^2) / PP = IV,

we get R = V / IT = V^2 / PR = V/I = 96 Ohm

T = (120 x 1.25) (96 / 4) = 300 K

σ = 5.67 x 10^-8 W/m^2K^4

Heat flux = σT^4

Heat flux on surface of filament = 238 W/m^2

B. On the surface of the glass bulb: The heat flux on the surface of the glass bulb can be determined by the Stefan-Boltzmann law. The filament emits radiation, which is absorbed by the glass bulb, raising its temperature.

The temperature of the glass bulb is unknown, but it is assumed to be at room temperature, which is 27°C or 300 K.

The filament radiates to all sides, so we need to find the total radiation emitted, which is then absorbed by the glass bulb. The total radiation emitted is given by;

P = σAT^4

Where A is the surface area of the filament

σ = 5.67 x 10^-8 W/m^2K^4T = temperature of filament = 300 K

The surface area of the filament is given by;

A = πDL

Where D is the diameter of the filament, and L is the length of the filament.

A = π x (0.5 x 10^-3 m) x (5 x 10^-2 m)

A = 7.85 x 10^-5 m^2P

A = (5.67 x 10^-8 W/m^2K^4) x (7.85 x 10^-5 m^2) x (300 K)^4

A = 13.7 W

The heat flux on the surface of the glass bulb is equal to the power absorbed by the glass bulb divided by the surface area of the glass bulb.

Heat flux = Power / Surface area of the glass bulb, Diameter of the glass bulb = 8 cm, Radius of the glass bulb, r = 4 cm

Surface area of the glass bulb = 4πr^2 = 201.06 cm^2 = 0.0201 m^2

Heat flux = 13.7 W / 0.0201 m^2 = 682 W/m^2

C. Calculation of savings when an LED light is used instead:

An LED light uses 15W for the same light output as a 150W incandescent lamp. It is used for 8 hours per day every day. The cost of electricity is $0.20 per kWh.

The savings per year are given by the equation:

Savings per year = Cost of using the incandescent lamp - Cost of using the LED light

Cost of using the incandescent lamp = Power used x Time used x Cost of electricity per kWh

Power used = 150 W

Time used = 8 hours per day x 365 days per year = 2920 hours per year

Cost of electricity per kWh = $0.20/1000 W hr^-1

Cost of using the incandescent lamp = (150 W) (2920 hours/year) ($0.20/1000 W hr^-1) = $876 per year

Cost of using the LED lamp = (15 W) (2920 hours/year) ($0.20/1000 W hr^-1) = $87.60 per year

Savings per year = $876 - $87.60 = $788.40

Therefore, the savings per year for using an LED light instead of an incandescent lamp are $788.40.

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99.16 Newtons is the new force of attraction between the particles.

The forces that hold atoms together to create molecules and solids are referred to as chemical bonds. The attraction between the electrons of one atom and the nuclei of another atom as a result of this electric force is what is known as a chemical bond.

\(F = (kq1q2)/r^2\)

\(9,916 = (kq1q2)/r^2\)

\(F = (k*(q1/5)*(q2/5))/(2r)^2\)

\(F = (1/100)((kq1*q2)/(r^2))\)

So, the new force of attraction is:

\(F = (1/100)*9,916 = 99.16\)Newtons (rounded to 4 decimal places)

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The wavelength of the fundamental string vibration is 0.64 m and the wavelength of the sound wave produced is 0.77 m. This difference is due to the change in speed of the sound wave in air and in the string.

Sound wave is a mechanical wave moves through a medium only. The frequency of a sound wave is called its pitch and it is the number of wave cycles obtained per unit time.

The wavelength for the fundamental frequency is = 2L

= 2 × 0.32 = 0.64 m

Now the speed of the sound waves in air = 340 m/s

frequency = 440 Hz or s⁻¹.

Thus, the  wavelength of sound wave = speed/ frequency

= ( 340 m/s)/  440 Hz = 0.77 m.

This change in wavelength from that of the  fundamental vibration is due to the change in speed of sound waves in different mediums.

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Answer:

The magnetic force acting on the proton is 1.68 x 10^-18 N.

Explanation:

magnetic field, B = 5 T

speed , v = 2.1 m/s

charge q = 1.6 x 10^-19 C

Angle, A = 90 degree

The magnetic force on the charge particle is given by

\(F = q v B sin A\\\\F = 1.6\times 10^{-19}\times 2.1\times 5\times sin 90\\\\F = 1.68\times 10^{-18} N\)

Answer:

Law of Reflection :

The law of reflection states that when light rays strike a smooth surface, the angle of reflection equals the angle of incidence, and the incident ray, reflected ray, and normal to the surface all lie in the same plane.

Here, let us consider, the ray A as the normal , as it is perpendicular to the surface of the plane mirror. When the incident ray hits the plane mirror at an angle say, θ  with the normal ( here, incident ray A) , then, θ will be  the angle of reflection.

Now if we consider all the incident rays A, B, C and D. Among them, let the ray C  make an  angle  Θ, with the normal ( here, incident ray A).

Therefore, from the image given, clearly,  θ = Θ, hence Θ is the angle of reflection, thus ray C best represents the reflected ray.

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The apparent wave frequency the strider measures will decrease. This is because the strider is moving away from the wave source, which means that the distance between the crests of the waves that it encounters will increase.

Since frequency is defined as the number of wave crests passing a fixed point per unit time, if the distance between the crests increases, the frequency will decrease. Therefore, even though the wave source is stationary, the apparent frequency of the waves that the strider measures will depend on its relative velocity with respect to the waves.

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The property of a transverse wave that stays the same even as the wave's energy and other properties change is the wavelength.

The correct option to the given question is option a.

The wavelength is the distance between two successive points of the wave that are in phase. As the wave's energy and amplitude change, the distance between two successive points of the wave that are in phase remains the same.

This is because wavelength is determined by the frequency of the wave and the speed of propagation. The frequency of the wave is the number of cycles of the wave that occur in one second, while the speed of propagation is the rate at which the wave travels through a medium.

If the frequency of the wave and the speed of propagation remain the same, then the wavelength will also remain the same even as the wave's energy and other properties change. This property is known as the characteristic of the wave.The amplitude is the maximum displacement of a point on the wave from its rest position. The frequency is the number of cycles of the wave that occur in one second. The rest position is the position of the medium when it is not disturbed.

Hence, wavelength of a transverse wave remains same even as the wave's energy and other properties change.

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I'm sorry but I don't know

Answer:

1 / f = 1 / o + 1 / i

1 / image distance + 1 / object distance = 1  focal length

If the object distance is large the image will be at about the focal length

The value of 1 / f is fixed for any one particular lense

As the object distance decreases the image must increase

The above equation can also be written as

o i / (i + o) = f    or i / (i / o + 1)  = f

If for instance o was very large the image would be at the focal length

The mayor is making a good decision to do research into renewable forms of energy. Not only does coal produce pollution, it also contributes to greenhouse gas emissions. Plus, the supply of coal is a finite source. It is considered a natural resource instead of renewable. That means that eventually the supply of coal will run out at some point. Renewables do not encounter such a problem.

So it's smart to look into alternative forms of energy such as nuclear or solar. The benefit of nuclear is that it produces a lot of energy and does so efficiently. The downside is that it's that accidents would lead to disastrous outcomes (eg: the nuclear disaster in Japan). Also, there's the issue of what to do with the nuclear waste. The waste itself is very dangerous and it must be buried underground sealed in thick containers. This is an expensive operation. The rate of decay of the material takes a long time, which means that future generations hundreds of years down the line will have to deal with the waste.

Solar is a cleaner alternative to nuclear, but unfortunately it is not as efficient compared to nuclear power. You need a lot of solar panels in a vast open area to be able to get the energy to power many homes. Places out in the desert are a good choice to put the solar farms because the sun shines intensely there and not many people (or no people) live out in remote areas such as that one.

Because the town is called Seaside, it seems like this town is on the coast. If so, then the mayor should look into wind power to complement solar power. Wind along the coast is often very intense due to the sea current and jet stream. The downside to wind power is that some days the wind doesn't blow at all. The mayor could also look into tidal power which harnesses the flow of the tides coming in and out. If a major river is nearby (that flows into the ocean) then s/he could consider hydroelectric power as well. There are many renewable options to pick from. Each option has its pros and cons, so it's up to the mayor to weigh what exactly their needs are and how efficiently they want electricity. Mixing various options is possibly the best idea since you get a bit of each pro/con from all the options mentioned.

Answer:

False

Explanation:

A net force on an object causes acceleration or a change in direction....not 'neither'

It is false that if a net force acts on an object, the object may change speed, change direction or do neither. Details about motion can be found below.

Newton's first law of motion also called law of inertia states that an object will remain at rest until it is acted upon by an external force.

This law suggests that an object will change direction or speed when acted upon by a net force.

Therefore, it is false that if a net force acts on an object, the object may change speed, change direction or do neither.

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Answer: Planets would be pulled into the sun

Explanation:

This is the correct answer.

The water weighs 900kg / (\(m^{2}\))

Force required to raise this layer is,

\(F_{t}\) = 900g(\(V_{t}\))

= 900(9.8) π(225 -\(y_{1}\) ^ 2) Δy

Each particle in the layer must travel a distance of approximately (15 + 5) -  \(y_{1}\)= 20 - \(y_{1}\)

The work \(w_{1}\) done to raise this layer to the top is approximately the product of the force \(F_{1}\) and the distance 20 - y

\(W_{1}\) ≈ \(F_{1}\)(20 - \(y_{1}\) )

≈ 900(9.8) π (225 - \(y_{1}\)^2)(20 - \(y_{1}\)) Δy

then solve,

and we get,

volume = π(225 - \(y_{1}\)^2)Δy

What is density ?

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Latin letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho). The density of a pure substance is equal to its mass concentration in numbers. Density varies widely among materials and may be important in relation to packaging, purity, and buoyancy. The densest known elements under conditions of normal temperature and pressure are osmium and iridium. It is occasionally substituted by the dimensionless quantity "relative density" or "specific gravity," which is the ratio of the density of the material to that of a standard material, typically water, to make density comparisons across different systems of units easier.

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A categorization of objects that have common properties is a classification.

Classification refers to the process of categorizing objects or entities based on their shared properties, characteristics, or attributes. It involves grouping items together based on common features or relationships to establish a systematic organization or taxonomy. Classification is a fundamental cognitive process that helps humans and systems organize and make sense of the world around them.

In various domains, classification is employed to organize data, information, or objects into distinct groups or categories. This can be seen in fields such as biology, where organisms are classified into different taxonomic categories based on shared characteristics. Similarly, in information sciences, classification is utilized to organize and categorize documents or data based on their content or attributes.

Overall, classification provides a framework for understanding and organizing objects or entities by identifying and grouping them based on their common properties or features.

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Answer:

C. 1.43 m/s

Explanation:

Velocity = displacement / time

v = (1 m − -9 m) / 7 s

v = 1.43 m/s

A weak stimulus that is presented repeatedly in short succession typically achieves threshold due to temporal summation.

Temporal summation is the process of combining multiple stimuli that occur in rapid succession to reach the threshold of excitation.The process of determining whether or not an action potential will be produced by the combined effects of excitatory and inhibitory signals, both from many simultaneous inputs (spatial summing) and from repetitive inputs (temporal summation), is known as summation (temporal summation). Summation may or may not reach the threshold voltage to initiate an action potential depending on the total of many different individual inputs.

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complete question:When a weak stimulus is applied in rapid succession, it will often reach threshold due to

A) temporal summation.

B) spatial summation.

C) excitatory summation.

D) inhibitory summation.

E) voltage potential.

Answer:

Im pretty sure its 11 m/s east because it is 22 m/s hitting 11 m/s and the force is harder hitting

Explanation:

im not 100% sure becasue i did this stuff a while ago

Answer:

60m/s

Explanation:

We are given that

Speed of car after 5 sec, v=40m/s

Acceleration ,a=\(-4m/s^2\)

We have to find the initial speed of car.

We know that

Acceleration, a=\(\frac{v-u}{t}\)

Where v=Final speed

u=Initial speed

Using the formula

\(-4=\frac{40-u}{5}\)

\(-4\times 5=40-u\)

\(-20=40-u\)

\(u=40+20\)

\(u=60\)

Hence, initial speed of car=60m/s

Tom will hit the floor with a velocity of 5.0 m/s horizontally and -7.67 m/s vertically.

Tom will strike the floor 1.5 meters below the edge of the table. To determine his velocity components just before he hits the floor, we need to break his velocity into its horizontal and vertical components. Since Tom was only moving horizontally before he fell off the table, his vertical velocity component is equal to his initial vertical velocity, which is zero.

Using the equation vf^2 = vi^2 + 2ad, where vf is the final velocity (5.0 m/s), vi is the initial velocity (0 m/s), a is the acceleration due to gravity (-9.8 m/s^2), and d is the distance Tom falls (1.5 meters), we can solve for Tom's final vertical velocity component, which is -7.67 m/s. Therefore, Tom will hit the floor with a velocity of 5.0 m/s horizontally and -7.67 m/s vertically.

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Answer:

C. 600 N

Explanation:

Given,

mass of object (m)= 300kg

acceleration(a) =2m/s^2

We know that,

Force(F)=ma

=300*2

=600N

So,600N force is required to give an object.

Answer:

600 N

Explanation:

aye pecks

Answer:first of all what is your question and i can give and example which is Use them when you have 2 forces named Fa & FF or Fg & Ff acting in opposite directions on an object and you need to know the resultant of your 2 forces.

Explanation:

i searched it up

1. Among the earliest adhesives were natural adhesives like tar, beeswax, and tree resins. These adhesives were used by early humans for various purposes like hunting, tool-making, and art.

2. Animal hides, bones, and hooves were often used to make glues. The collagen protein found in these animal parts was extracted and boiled to create a gelatinous substance that could be used as an adhesive.

3. The "technical" name for "super glue"-type adhesives is cyanoacrylate. These adhesives are known for their fast-drying and strong bonding capabilities.

4. Law enforcement uses super glue or cyanoacrylate to lift latent fingerprints from crime scenes. When the adhesive is applied to a surface, it reacts with the oils and sweat from the skin, creating a visible and permanent print.

5. Adhesion refers to the sticking together of two different surfaces, while cohesion refers to the sticking together of molecules within the same substance. Adhesion is the force that allows a sticker to stick to a surface, while cohesion is the force that holds water droplets together on a surface. In other words, adhesion occurs between two different materials, while cohesion occurs within a single material.

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Answer:

v = 135.13 mph

Explanation:

Given that,

The race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south.

We need to find the speed of the car.

We know that,

Speed = distance/time

So,

\(v=\dfrac{500\ miles}{3.7\ h}\\\\v=135.13\ mph\)

So, the speed of the car is equal to 135.13 mph.

It takes 3.6 seconds for the keys to hit the ground below. To solve this problem, we need to use the equation for the vertical displacement of an object in free fall,

y = y0 + v0y*t + 0.5*g*t^2
where y is the final vertical position, y0 is the initial vertical position, v0y is the initial vertical velocity, g is the acceleration due to gravity, and t is the time.

In this case, we want to find the time it takes for the keys to hit the ground, so y = 0. The initial vertical position is 64 m, the initial vertical velocity is 0 (since the keys were thrown horizontally), and the acceleration due to gravity is -9.8 m/s^2.

Plugging these values into the equation, we get:
0 = 64 + 0*t + 0.5*(-9.8)*t^2

Simplifying and rearranging, we get:
4.9*t^2 = 64
t^2 = 64/4.9
t = sqrt(64/4.9)

So the time it takes for the keys to hit the ground is:
t = 3.6 seconds

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The total resistance of the circuit would be the sum of the individual resistances, which in this case is 100Ω + 300Ω + 200Ω = 600Ω.
When resistors are connected in series, the total resistance is the sum of the individual resistances. In this case, you have a 100Ω, 300Ω, and 200Ω resistor connected in series. To find the total resistance, simply add the three values together: Total resistance = 100Ω + 300Ω + 200Ω = 600ΩSo, the total resistance of the series connection is 600Ω.Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistane

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Answer:

Answer: Explanation: Person A's velocity relative to the train is 0. Therefore, the pitch of the horn will not change.

Explanation:

The person who hears the train horn at a lower pitch is A.

Pitch of any sound wave is directly proportional to the frequency. The higher frequency instruments have higher pitch.

As the train in the image (attached) moves to the right, Person A and B are sitting in the train. Person C and D are standing outside the train.

Person A's velocity relative to the train is 0. So, the pitch of the horn will not change.

Therefore, the person A will hear the train at lower pitch.

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