A man weighing 800 newtons is standing on a chair. In order to support the man, the chair is exerting a force of.

Answer:

Frequency=200Hz Time Period=1/Frequency =1/200=0.005sec.

Explanation:

The horizontal force needed to pull the rug and Thomas across the floor at a constant speed is 78 N.

Taking to Thomas and the rug as a single system, if they slide across the floor at constant speed, this means that their acceleration is just zero. According to Newton's 2nd Law, if the acceleration is zero, this means that the net force applied is zero too.

In the horizontal direction, there are two forces acting on Thomas and the rug (as a single system), the applied force, and the kinetic friction force, which must be equal and opposite each other:

= f (Thomas) = f(rug)

By definition, as the friction force is the horizontal component of the contact force, it can be expressed as follows:

= f(rug) = μF(normal)

where μ = coefficient of kinetic friction = 0.12 and F(normal)

In this case, as the system thoomas+rug is not accelerating in the vertical direction, and the surface is level, the normal force (which is always perpendicular to the surface), must be equal to the force of gravity.

Assuming that the mass of the rug is neglectable, we can write:

= F(normal) = F(g)

= F(g) = mg

= 650 N

Substituting in the first equation,

= f (Thomas) = f(rug) = 0.12 X 650

= f = 78 N

To know more about Force:

https://brainly.com/question/20904690

#SPJ4

The image of G for a dilation with center 0 0 is G(1,-3).

Dilation is the process of changing the size of an object or shape by shrinking or enlarging its dimensions by some factor. For example, a circle with a radius of 10 units will shrink to a circle with a radius of 5 units. Applications of this method are used in photography, crafts, creating logos, etc. Geometry has four basic transformation types.

Point G lies 1 on the X-axis and -three on the Y-axis.

when the size component is 1, the photograph stays similar to its pre-image.

Dimensions of the authentic plotted factor x Scale thing = Dimensions of

the brand new plotted factor

(1,-3) x1 = (1,-3).

After the dilation, pre-photograph image has gone through the transformation

the subsequent way. G(0,0)→ G(1,-3)

To learn about scale factor -

https://brainly.com/question/22312172

#SPJ4

The mass (in grams) they should choose to hang from the spring in order to meet the challenge is 973.7 g

The period of oscillation is related to mass and spring constant according to the following formula:

T = 2π√(m/K)

Where

Using the above formula, we can obtain the mass that Laquinta and Jamar will choose in order to meet the challenge. Details below:

T = 2π√(m/K)

Square both sides

T² = 4π²m / K

Cross multiply

4π²m = T²K

Divide both sides by 4π²

m = T²K / 4π²

m = (1² × 38.4) / (4 × 3.14²)

m = 0.9737 Kg

Multiply by 1000 to express in grams

m = 0.9737 × 1000

m = 973.7 g

Thus, the mass is 973.7 g

Learn more about mass:

https://brainly.com/question/13928625

#SPJ1

This feature of a comet develops when the celestial body passes close to a star such as the sun. The ice around the nucleus of the comet sublimates forming the coma around the comment (when hit by light photons as observed from the earth). The tails are also formed by the ice being pushed a bit behind the comet by light pressure.

When the comets gets near the sun, they get heated up. The white fumes seen on the comet are actually the burning sensations of the sun. When the comet gets near to the sun, the hot fire catches up the comet and the fumes are born on it.

The same happens when a meteor or a comet enters the surface of the earth.

Therefore, when they enter the surface of the earth, they tend to come in contact with the gases present in the atmosphere with great speed which makes those astronomical bodies turn into a globe of fire.

To know more about comet, refer: https://brainly.com/question/14322257

#SPJ4

The period of this pendulum if its mass is doubled. The required analysis involves thinking about ratios is The period is 8 s when the pendulum's mass is doubled.

When a weight is shifted sideways from its equilibrium position, gravity acts as a restoring force on it, causing it to accelerate back toward the equilibrium position. This is what is meant by the term "pendulum," which refers to a weight that is hanging from a pivot so that it can swing freely. The restoring force acting on the mass of the pendulum once it is released causes it to oscillate, swinging back and forth about its equilibrium point. The duration, or the time required for a left swing and a right swing, is the period. The length of the pendulum and, to a lesser extent, the width of the amplitude, or swing, affect the period. Since Galileo Galilei's early scientific investigations of it in 1602, pendulums have been employed for timekeeping, and they remained the most precise timekeeping technology until the 1930s. For 270 years, households and offices utilized the pendulum clock invented by Christiaan Huygens in 1658 as the world's primary timekeeper before the quartz clock took its place.

To know more about pendulum please refer: https://brainly.com/question/14759840

#SPJ4

Heat engines are engines that convert heat energy into mechanical energy.

If the efficiency of engine is = 25%

Then to calculate the input energy,

25 % X 600 = 150J

The efficient utilized energy is 150J

and the energy which is expelled as waste heat is

= 600J - 150J

= 450 J

To know more about heat engine,

https://brainly.com/question/28034387

#SPJ4

The maximum amount of ice that can melt is 1.45 kg. The most heat that a copper block can dissipate Q=m * C

M = copper block's mass

C = copper's heat

Copper block mass, m=2.5 kg=2500g

the copper block's temperature increasing, =500^o C

Copper-specific heat, C = 0.39J / goC

The heat of water fusion, L=335J/g

The much heat that a copper block can possibly lose,

Q = m × C  

=2500 × 0.39×500    

=487500J

When the copper block is placed on the ice block, let be the volume of ice that melts. = m1 g

The heat that the melted ice gained,

Q=m1L

m1=Q / L

=487500 / 335

=1455.22g

Hence, the maximum amount of ice that can melt is 1.45 kg.

To learn more about the maximum amount of ice that can melt Please visit the below link.

https://brainly.com/question/14476899

#SPJ4

The tension on the wire is 52.02 N.

From the question, we have

Density of aluminum = 2700 kg/m3

Area,

A = πd²/4

A = π x (4.6 x 10⁻³)²/4

A = 1.66 x 10⁻⁵ m²

μ = Mass per unit length of the wire

μ = ρA

μ = 2700 kg/m³ x 1.66 x 10⁻⁵ m²

μ = 0.045 kg/m

Tension on the wire = √T/μ

34 = √T/0.045

34² = T/0.045

T = 52.02 N

The tension on the wire is 52.02 N.

Complete question:

The density of aluminum is 2700 kg/m3. If transverse waves propagate at 34 m/s in a 4.6-mm diameter aluminum wire, what is the tension on the wire.

To learn more about tension visit:  brainly.com/question/14336853

#SPJ4

When a balloon is released, its buoyant force is 0.0316 N, and its net vertical force is 0.0096 N.

a) volume of balloon = 2.5 litre = 0.0025 m3

Buoyant force = Density of air * g * Volume of displaced air

At STP, the density of air is approximately 1.29 kg/m3

Buoyant force = 1.29 * 9.8 * 0.0025 = 0.0316 N

b) Net vertical force = Buoyant force – Weight

density of helium = 0.1786 kg/m3

Weight of rubber + helium = [0.0018 + (0.1786*0.0025)] * 9.8 = 0.0220 N

Net vertical force = 0.0316 – 0.0220 = 0.0096 N

A fully or partially submerged object is subject to an upward force known as the buoyant force. Upthrust is another name for this thrust upward. A body that is partially or completely submerged in a fluid gives the impression of losing weight because of the buoyant force, or that it is lighter.

The tendency for an object to sink is when its density exceeds that of the liquid it is submerged in. The object may be kept afloat by force if it is either less dense than the liquid or is shaped properly (like a boat). It floats in water if its relative density is less than one, and it sinks in water if its relative density is more than one.

Learn more about buoyant force here:

https://brainly.com/question/21990136

#SPJ4

A material with a mass of 2.0 g when placed in a graduated cylinder the volume changed from 70 ml to 75 ml has a density of 0.4 g/mL.

How do I calculate the substance's density?

We'll start by getting the substance's volume. This is attainable as follows:

Water volume: 70 mL

75 mL = volume of material + water.

Substance volume =?

Substance volume equals (substance volume plus water) - (Volume of water)

Substance volume = 75 - 70

5 mL is the substance's volume.

Finally, we will calculate the substance's density. Below is an example to help:

2.0 g is the substance's mass.

5 mL is the substance's volume.

Substance density =?

Mass / volume equals density.

Substance density = 2/5

0.4 g/mL is the substance's density.

The density is therefore 0.4 g/mL.

To know more about density, visit:

brainly.com/question/952755

#SPJ4

Number of oxygen molecules in each breath is 2.9 × 10²¹ mol.

The volume of air inside a breath is

V= 6 × 1/10⁴ m³

Of this, only 20% is oxygen, so the volume of oxygen is

V= 0.20 × 6 × 1/10⁴ m³

Then we can find the number of moles of oxygen by using the ideal gas equation

PV = nRT

Solving for n, we find

n= PV/RT = 4.8 × 1/10³ mol

Since the number of molecules in 1 mol is

6.022×10²³

(Avogadro number)

Then the number of molecules in  of oxygen is

(4.8 × 1/10³ mol)(6.022×10²³ mol)

= 2.9 × 10²¹ mol

What is the ideal gas law?

The ideal gas law, also called the general gas equation, is the equation of state for a hypothetical ideal gas.

To know more about ideal gas law, click the link given below:

https://brainly.com/question/13821925

#SPJ4

Picometer's spatial constraints for the specified range of electrons would be roughly 50 picometers.

What exactly is a transmission electron microscope (TEM)?

A transmission electron microscope (TEM) is a type of microscope that produces precise pictures of the structure of materials at the atomic or molecular scale using a beam of high-energy electrons. A focussed beam of electrons is sent through a tiny sample and the transmitted electrons are collected on a fluorescent screen or an electronic detector.

As per the problem:

The spatial resolution of the TEM would be hundreds of nanometers at the lower end of the energy range of 40.0 kV. At the upper end of the range (100 kV), the spatial resolution would be in the tens of nanometers.

In general, TEMs with electron energies ranging from 40 to 100 kV are capable of discerning features as small as 50 picometers (pm). The actual spatial resolution, however, will be determined by a number of criteria, including the quality of the electron optics, the stability of the electron beam, and the sample preparation.

It's worth mentioning that TEMs with considerably greater electron energies (up to several hundred kV) are available, allowing for spatial resolutions as low as one angstrom (less than 0.1 pm).

The method of transmission electron microscopy (TEM) is used to examine the characteristics of incredibly small specimens. Scientists can now see aspects like structure and morphology thanks to technology that accelerates an electron beam through a very thin specimen.

How does TEM work?

Transmission electron microscopes (TEM) are types of microscopes that provide an image that is greatly enlarged while viewing specimens using an electron particle beam. TEMs have a 2 million-fold magnification capacity.

What are the three different TEM types?

A TEM typically has three steps of lensing. The projector lenses, objective lenses, and condenser lenses make up the stages.

To know more about TEM visit;

https://brainly.com/question/20798178

#SPJ4

When a block with a mass of 55 kg is dragged with a force of 220 n, the acceleration is 4 m/s².

The frictionless surface it is maintained on means that the block will be under a net external force of 220 N.

The block weighs 55 kg.

F = m × a

In this case, the item is subjected to a net external force (F), mass (m), and acceleration (a).

Using the appropriate values in place of F and m:

220 = 55 × a

220 = 55 × a

Taking 55 as a factor, we get 4 = a.

As a result, a 55-kilogram item is drawn over a frictionless surface with an acceleration of 220 N is 4 m/s².

Learn more about force at

https://brainly.com/question/11700993?referrer=searchResults

#SPJ4

It had become weak enough for magnetic fields to stop interfering with light. Electromagnetic waves, or photons, are particles that can travel in response to the strength of magnetism.

Reionization is the stage at which gases condensed to the extent necessary to give rise to the first stars and galaxies.

To know more about magnetic fields

https://brainly.com/question/27496090

#SPJ4

A new oscillation period of 4T will be used. Pluto is currently in the pendulum's swing.

One-tenth the mass of the pendulum bob, it turns out, the string of a simple pendulum has that mass.

Use the equation L = (T/ 2)2*g to determine how long a basic pendulum is. where g is the gravitational acceleration and T is the simple pendulum's period of time. It consists of a point mass "m" hung from a fixed support by a light, inextensible string with length L. A gravitational force is responsible for the motion, which is in a vertical plane.

To know more about oscillation visit :-

https://brainly.com/question/17133973

#SPJ4

L=((N2)* u* A)/l is the coil's inductance in Henrys. Therefore, doubling the number N of turns results in a four times (2^2) increase in inductance.

Often in the form of a coil, a conductor's inductance is a quality that is determined by the amount of the electromotive force, or voltage, that is induced in it in comparison to the rate at which the electric current that generates the voltage changes.

Henries (H) is used as the unit of measure for self-inductance. A device's resistance to a change in current through it is inversely proportional to its self-inductance L. A big L, such as that seen in a large coil with numerous turns and an iron core, prevents rapid changes in current.

To learn more about inductance Please visit the below link.

https://brainly.com/question/8419798

#SPJ4

The band gap energy in kilojoules per mole is 1.73×105J.

The band gap is the distance between the valence band and the conduction band of an electron. Essentially, the bandgap represents the minimum energy required to excite an electron to a state in the conduction band where it can participate in conduction. Higher frequencies and lower wavelengths of light are absorbed.

In physics, especially for solids, the band gap is also called the energy gap. It is the range of energies that exist in solids where no other electronic state can exist. In the diagram of the electronic band structure of solids, the bandgap is commonly called the energy difference.

Learn more about band gap energy here:-https://brainly.com/question/16960217

#SPJ4

The next solar maximus which will be visible with 157 or close to 157 sunspots will be visible after 11 years. which is 2000.

Sunspots are formed in region of higher magnetic field, they appear dark on the surface of the Sun.

Solar maximus is nothing but the regular amount of period of the greatest solar activity during the sun's 11 year solar cycle.

It was not exactly 157 but 140 sunspots were seen in 2000.

As the year follows, the sunspots are becoming lesser and lesser.

This data is yearly created by NASA.

To know more about solar maximum,

https://brainly.com/question/13843302

#SPJ4

As many impactors as the moon and mars combined have struck the earth are 35,400. Since the deposition process is happening everywhere across the planet

a) In the past 600 million years, the Moon has been struck by about 60 impactors, compared to about 43,000 for Mars.

Therefore, if we divide the size of Washington by the size of the hit, we get

177000 km² ÷ 5 km = 35,400.

b). However, there are no impact craters that are 5 km wide because the deposition process is ongoing everywhere over the earth. The erosional material that fills the craters causes them to shrink in size until they are no wider than 5 kilometers.

A deposition is a geological process that involves the addition of soil, rocks, and sediments to a landform or landmass. Transported by wind, ice, water, and gravity, previously weathered surface material is deposited when enough kinetic energy in the fluid is lost, forming layers of sediment.

The null-point hypothesis states that deposition occurs when sediment transportation-related forces are no longer strong enough to overcome gravity and friction-related factors, which provide resistance to motion. The deposition also covers the accumulation of sediment brought on by chemical or organic processes.

Learn more about deposition here:

https://brainly.com/question/28924598

#SPJ4

An electroscope is used to detect the presence of an electric charge. It consists of two metal plates or leaves that are suspended from an insulating support.

When an electric charge is brought near the electroscope, the leaves will diverge due to the electrostatic force of repulsion between them.

The extent of the divergence will depend on the magnitude of the charge. However, it is not possible to determine the sign (positive or negative) of the charge from an electroscope alone.

An electroscope is a device used to detect the presence of an electric charge. To tell if an electroscope has an electric charge, you can observe the behavior of the metal leaves on the electroscope.

When an electroscope has an electric charge, the metal leaves on the electroscope will spread apart. This is because the same charge on the metal leaves repels each other, causing them to move away.

It is not possible to tell from an electroscope alone what kind of charge it has. To determine the type of charge, you will need to use another device to induce a charge on the electroscope and observe the behavior of the leaves. If the leaves move away from each other, the electroscope has a positive charge. If the leaves move towards each other, the electroscope has a negative charge.

to know more about magnitude click here:

https://brainly.com/question/30015985

#SPJ4

The change in internal energy when work is done on system is 9J.

In thermodynamics, the ideal gas concept is often used. This is an approximation of a real system used for educational purposes.

An ideal gas is a gas made up of particles that appear as point objects that interact only by elastic collisions. Here the kinetic energy consists only of the translational energies of the individual atoms.

Therefore, the change in the internal energy of an ideal gas is due only to the change in its kinetic energy. In this case the energy depends only on pressure, volume and thermodynamic temperature. Values ​​are proportional to the mass (in moles), temperature, and specific heat of a given volume of gas.

Q=U+W

U=Q-W

U=150-159=9J

To know more about specific heat -

https://brainly.com/question/11297584

#SPJ4

The formula for wave speed is - wave speed=frequency of wave × wavelength of wave.

Wave speed is the distance the wave goes in a given measure of time, for example, the quantity of meters it voyages each second. The condition that addresses the wave speed is given as follows:

On the off chance that a sea wave peak ventures a distance of 30 m in 10 seconds, then, at that point, the speed of the sea wave is 3 m/s. Then again, in the event that the peak of the sea wave covers a distance of 40 m while is 10 seconds, then, at that point, the speed of this sea wave is 4 m/s. From this, we can reason that the quicker wave covers a bigger distance in a similar measure of time.

In mathematical terms ,formula of wave speed is

c=ν × λ

where c is the defined as the speed of wave  in any medium,

ν is  defined as the frequency of the wave and

λ is defined as the  wavelength of the wave.

To know more about wave speed, visit here:

https://brainly.com/question/28446485

#SPJ4

The Force that must be exerted on the pedal cylinder of a hydraulic lift is 136.11 newton.

Archimedes' principle states that:

F1 / A1 = F2 / A2

F2 = (A2 / A1) * F1

Also, the formula for the force is F = mg. (g is gravity = 9.8)

Formula for the area of the cylinder is A = πr^2, therefore we get

F2 = (πr2^2 / πr1^2) * mg

Given the diameter of the cylinders as 2 cm and 24 cm, so, the radius is :

r1 = 2/2 = 1

r2 = 24/2 = 12

π = 3.14

Substituting the above values in the formula, we get:

F2 = (π 1^2 / π 12^2) * 2000 * 9.8

F2 = (3.14*1^2 / 3.14*12^2)*2000*9.8

F2 = 136.11 N

So, we can conclude by saying that the force that must be exerted on the pedal cylinder of a hydraulic lift is 136.11 newton.

To know more about Force,

brainly.com/question/25239010

#SPJ4

A) The rock moves at 2.1 m/s when the string passes through the vertical position. (B) 0.83 N of string tension is present when the angle is 45 degrees. (c), the string is under 1.867 N of tension as it passes through the vertical position.

We are given that,

Mass = m = 0.12kg

String length = l = 0.80m

The maximum angle = θ = 45°

a) To determine the rock's speed when the string is in the vertical position, we have

using the first principle of thermodynamics

Kinetic energy = potential energy

1/2×m×v² = m×g×l×(1-cosθ)

v² = 2×g×l×(1-cosθ)

v²  = 2×9.81×0.8×(1-cos45) = 4.597

v = √4.597 = 2.1 m/s

(b) The tension in the string at a 45° angle to the vertical is determined by in order to maintain equilibrium between tension and rock mass, ∑Forces = 0,

T - m×g×cosθ = 0

T =  m×g×cosθ

T = 0.12×9.81×cos45

T = 0.83 N

(c) The string's tension as it crosses the vertical as we cross the vertical,

T = m×g + (m×v²)/r

T = mg(1+2(1-cosθ))

T =0.981 × 0.12 (1+ 2(1-cos45))

T=1.867 N

The given question is incomplete , complete question is given below,

A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. Air resistance is negligible. (A). What is the speed of the rock when the string passes through the vertical position? Express your answer using two significant figures. (B) What is the tension in the string when it makes an angle of 45∘ with the vertical?(C). What is the tension in the string as it passes through the vertical?

To know more about tension

https://brainly.com/question/12906769

#SPJ4

C.) Only weight changes depending on the gravitational force.

The term gravitational force refers to the force that the earth exerts on a body. Examples of motion caused by gravitational force include the downward motion of water in a river, the downward motion of water in a stream, and the upward motion of a ball when it is thrown.

An equipment used to gauge gravitational acceleration is called a gravimeter. There is a gravitational potential for each mass. This potential's gradient acts as a force. This gravitational force is quantified by a gravimeter.

The size of this force is determined by the mass of each object and the separation of their centers.

Learn more about Gravitational Force here:

brainly.com/question/12528243

#SPJ1

A student pulls a box of books on a smooth horizontal floor with acceleration of the box will be 1.99 m/s.

When we apply a horizontal force on a body kept on horizontal floor, a horizontal force starts opposing the net applied force. This force is called frictional force and is always tangential to the contact surface.

We can also find the normal force on the horizontal surface using the coefficient of friction. The basic formula of friction is f =mu N; from this, we get N = f/mu. mu is the coefficient of friction which tells the measure of friction acting between the surface.

To know more about  force visit :-

https://brainly.com/question/13191643

#SPJ4

It is D. is none of the other things listed here. The stars of the Milky Way are all near a great circle on the Celestial Sphere. This great circle is called the milky circle

The Milky Circle is a great circle on the celestial sphere that is defined by the stars of the Milky Way. It is visible to the n_aked eye and is one of the most recognizable features of the night sky, stretching across the entire sky from horizon to horizon. It is composed of millions of stars, all of which reside in the same galactic plane and are moving in the same direction around the galactic center. The Milky Circle is a beautiful sight to behold, especially during a clear night, when it appears as a wide band of light. It is a reminder of the vastness of the universe and the beauty of the night sky. It is also a great way to orient oneself in the night sky, as its stars form a familiar pattern that can help one find constellations and other objects.

To know more about milky circle refer to the link brainly.com/question/29705703

#SPJ4

The equal and opposite force is the force of your friend's hand pulling on the rope in the opposite direction.

According to Newton's Third Law of Motion, for every action there is an equal and opposite reaction. In this case, the action of your hand pulling on the rope creates an equal and opposite reaction of your friend's hand pulling on the rope in the opposite direction. This creates a tug-of-war situation, where the two forces are in equilibrium and the rope does not move. This is what Newton's Third Law is all about - that two forces are always equal and opposite.

Learn more about Newton's Laws: https://brainly.com/question/25545050

#SPJ4

The magnitude of the average induced emf if the uniform magnetic field has a strength of 1.5T is 150 Volts.

We know that the rate of change in magnetic flux will cause EMF in a closed loop because of Faraday's law of electromagnetic induction.

So, according to Faraday's law

[tex]EMF = N\frac{BA}{del T}[/tex]

where,

N = 50

B = 1.5T

del T = 0.075s

A = 0.15 [tex]m^{2}[/tex]

So,

[tex]EMF = 50(\frac{1.5*0.15}{0.075})[/tex]

[tex]EMF = 150 Volts[/tex]

To know more about Faraday's law

brainly.com/question/1640558

#SPJ4