In order to prevent muscle contraction from misaligning bones during healing (which can cause a permanent limp), injured or broken legs must be supported horizontally and at the same time kept under tension (traction) directed along the leg. One version of a device to accomplish this aim, the Russell traction apparatus, is shown in (Figure 1). This system allows the apparatus to support the full weight of the injured leg and at the same time provide the traction along the leg.
If the leg to be supported weighs 43.0 N, what must be the weight of W? Express your answer in newtons
What traction force does this system produce along the leg? Express your answer in newtons.

The maximum speed that the car can travel without slipping is 28 m/s.

For a car driving around a circular path not skid at maximum speed, then the centripetal force of the car must be equal to the static frictional force.

Fc = Fs

ma = μmg

a = μg

v²/r = μg

v² = rμg

v = √rμg

where;

v = √(100 x 0.8 x 9.8)

v = 28 m/s.

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I can't help with this one.

The maximum efficiency of the heat engine is 23%.

The actual efficiency of the heat engine is 13%.

The temperature of the system is 273.36 ⁰C.

The pressure of the system is 607.5 Pa.

The given parameters:

The maximum efficiency of the heat engine is calculated as follows;

\(\eta = 1- \frac{T_c}{T_h} \\\\ \eta = 1 - \frac{285}{371} \\\\ \eta = 0.23\\\\ \eta = 23 \ \%\)

The actual efficiency of the heat engine is calculated as follows;

\(\eta = 1 - \frac{q_c}{q_h} \\\\ \eta = 1 - \frac{370}{425} \\\\ \eta = 0.13\\\\ \eta = 13\ \%\)

The temperature of the system is calculated as follows;

\(\Delta S = \frac{\Delta H}{T} \\\\ T = \frac{\Delta H}{\Delta S}\\\\ T = \frac{243}{675} \\\\ T = 0.36 \ K\\\\ T = 273.36 \ ^0C\)

The pressure of the system is calculated as follows;

\(W = P \Delta V\\\\ P = \frac{W}{\Delta V} \\\\ P = \frac{243}{2.5} \\\\ P = 607.5 \ Pa\)

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Answer:

36 volts

If the circuit has a current of 3 amps, and a 12 ohm resistor.

12 x 3 = 36volts

Answer:

36 v

Explanation:

The electric potential energy of the charge pair, separated by 10 cm distance and having 2 C charges, would be 0.9 J.Explanation:Given,Electric charge of each point = 2 CCoulomb's Constant = 9 x 10^9 Nm^2/C^2

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Answer:

Described below

Explanation:

1) Solids: In solids, the strong attractive forces between the particles ensure that the particles are packed tightly enough and this means little or no movement between each other. However, when they experience vibration which has relationship with the kinetic energy between them

2) Liquids; In liquids due to the lesser forces of attraction between the particles, it means they tend to glide over each another but however, toward the bottom of the container they will settle. This means that the attractive forces between the liquid particles are barely strong enough to hold onto a specific volume. However, they are not strong enough to keep the molecules from sliding over one other.

3) Gases; In gases, there is almost no existing attractive force in most cases and as a result we can say the kinetic energy of the gas molecules is always greater than the attractive force between them and they are therefore far apart from each other and also move independent of each other.

Answer:

a healthy diet can prevent both diseases.

Explanation:

proof- i think i heard this in health class??? seems like best choice out of the four

Answer:

I think so too but if I recall I might have done this before

Explanation:

The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Answer:

D

Explanation:

Acceleration is the rate of change in velocity experienced by an object, measured in meter per second.

Answer:

Change in velocity

Explanation:

a-pe-x

Answer:

hello and thank you

Explanation:

The existence of coal beds in Antarctica is evidence that the region once experienced significant warming and was home to vast amounts of plant life.

One of the earliest hypotheses put up by geologists for how continents might migrate through time is called continental drift. The science of plate tectonics has now supplanted the theory of continental drift.

The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth, occasionally crashing through oceans and into one another, in the early 20th century. He referred to it as continental drift.

What is known about Antarctica's changing climate is that it didn't begin to cool until roughly 34 million years ago, when the continent was severed from the others which supports Continental Drift theory.

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Answer:

B 23m/s

Explanation:

From the above information we get,

Initial velocity= 3m/s

Acceleration by gravity = 10 m/s2 (approx)

Time taken =2 seconds

v=u+at (First Equation Of Motion)

v= 3 + 10 × 2

v= 23 m/s

Using the thin lens equation, 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance.

We can solve for di: 1/40 = 1/80 + 1/di
1/di = 1/40 - 1/80
1/di = 1/80
di = 80 cm
This means the image is formed 80 cm behind the lens. To find the height of the image, we can use the magnification formula, M = -di/do, where M is the magnification: M = -80/80
M = -1
This means the image is inverted and the same size as the object. Therefore, the height of the image is also 3.0 cm.

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a. By the work-energy theorem, the total work required to stop the car is equal to the change in its kinetic energy,

W = 0 - 1/2 (750 kg) (25 m/s)² ≈ -230 kJ

b. The car covers a distance x as it stops such that

W = (-725 N) x   ==>   x ≈ 320 m

Answer: Both cannonballs will hit the ground at the same time.

Explanation:

Suppose that a given object is on the air. The only force acting on the object (if we ignore air friction and such) will be the gravitational force.

then the acceleration equation is only on the vertical axis, and can be written as:

a(t) = -(9.8 m/s^2)

Now, to get the vertical velocity equation, we need to integrate over time.

v(t) = -(9.8 m/s^2)*t + v0

Where v0 is the initial velocity of the object in the vertical axis.

if the object is dropped (or it only has initial velocity on the horizontal axis) then v0 = 0m/s

and:

v(t) = -(9.8 m/s^2)*t

Now, if two objects are initially at the same height (both cannonballs start 1 m above the ground)

And both objects have the same vertical velocity, we can conclude that both objects will hit the ground at the same time.

You can notice that the fact that one ball is fired horizontally and the other is only dropped does not affect this, because we only analyze the vertical problem, not the horizontal one. (This is something useful to remember, we can separate the vertical and horizontal movement in these type of problems)

Answer:

B

Explanation:

Answer:

Correct option is (a)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J  = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J  = -350 J

hence, 350J energy is decreased or lost by system

(c)200J of kinetic energy is added and 250J of thermal energy is lost

⇒ Total energy = 200-250 J  = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J  = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J  = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J  = -350 J

hence, 350J energy is decreased or lost by system

(c)200J of kinetic energy is added and 250J of thermal energy is lost

⇒ Total energy = 200-250 J  = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J  = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

Answer:

The name of the force is elastic (spring) force

Explanation:

The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer

The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.

the energy of ultraviolet radiation that has a wavelength is 6.95*\(10^{-19}\) kj/photon

calculation :

1.E =hc/λ

λ = hc/E

 = \(\frac{6.6626*10^{-34}*3*10^{8} }{1.99*10^{-19} }\)

 = \(1.0*10^{-8}m\)

2 . E =hc/λ

    λ = hc/E

       =  \(\frac{6.6626*10^{-34}*3*10^{8} }{3.97*10^{-19} }\)

      = 501 nm

3 . λ = 286 nm

     E =hc/λ

        =   \(\frac{6.6626*10^{-34}*3*10^{8} }{286}\)

        =  6.95*\(10^{-19}\) kj/photon

In physics, energy is the quantitative property transmitted to the body or physical system, perceived in the performance of work and in the form of heat and light. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed. The unit of measure for energy in the International System of Units (SI) is the joule (J).

Common forms of energy include the kinetic energy of moving bodies, the potential energy stored in bodies (due to their position in the field, etc.), the elastic energy stored in fixed bodies, the chemical energy associated with chemical reactions, Radiant energy carried by electromagnetic radiation and internal energy contained in thermodynamic systems. All living things absorb and emit energy all the time.

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Explanation:

length of pipe= 32 ft

wavelength of wave λ= 8.8 m

let f be frequency

we know velocity of wave v=λf

therefore, f=v/λ = 346/8.8 = 39.31 per second or hertz

time period = 1/f = 1/39.31 = 0.02543 seconds

The frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.

Frequency is defined as the number of repetitions of waves occurring in 1 second. Frequency is also defined as the number of cycles completed in 1 second. SI unit of frequency is Hz.

The given data in the problem is;

L is the length of pipe= 32 ft

λ is the  wavelength of wave= 8.8 m

f is the frequency=?

T is the time period=?

The frequency is fine as the ratio of the speed of wave and wavelength.,

\(\rm f= \frac{v}{\lambda} \\\\ \rm f= \frac{346}{8.8}\\\\ \rm f= 39.31 \ Hz\)

The time period is guven as the inverse of the time period.

\(\rm T = \frac{1}{f} \\\\ \rm T = \frac{1}{39.31} \\\\ \rm T = 0.02543\ sec\)

Hence the frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.

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Answer:

Proteins are organic compounds containing nitrogen that are made of long, linked chains of amino acids and are a part of all living organisms.

The value of the voltage needed in the circuit is 30 V.

The voltage of the source is calculated by applying ohm's law. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing across the conductor.

Mathematically, the formula for the relationship between voltage, power and current is given as;

P = IV

V = ( P ) / ( I )

where;

The value of the voltage needed in the circuit is calculated as follows;

V = ( 600 W ) / ( 20 A )

V = 30 volts

Thus, the voltage needed in the circuit is a function of the power supplied in the circuit and the current flowing in the circuit.

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Answer:

most likely just 1

Explanation:

I sucked at sig figs in middle school, in fact it was the lowest test grade i ever received, but it is relatively simple.

because there is only one sig fig involved in each number, there can't be multiple sig figs here. 3000/500=6

500/3000=2(round up from 1.66666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666) you get the point.

Observations in the X-ray portion of the spectrum are routinely done from the surface of the Earth is a false statement .

As a result, the planet emits the most energy in the infrared region of the electromagnetic spectrum is correct statement .

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Answer:

y

Explanation:

godfydufufufjfhduddjgjxhdudhdufjfufigjfhfu

Answer:ye

Explanation:

Answer:

100°C

Explanation:

The heat gained by the ice equals the heat lost by the steam, so the total heat transfer equals 0.

Heat lost by the steam as it cools to 100°C:

q = mCΔT

q = (3 kg) (2.00 kJ/kg/K) (100°C − 120°C)

q = -120 kJ

Total heat so far is negative.

Heat lost by the steam as it condenses:

q = -mL

q = -(3 kg) (2256 kJ/kg)

q = -6768 kJ

Heat absorbed by the ice as it warms to 0°C:

q = mCΔT

q = (6 kg) (2.11 kJ/kg/K) (0°C − (-40°C))

q = 506.4 kJ

Heat absorbed by the ice as it melts:

q = mL

q = (6 kg) (335 kJ/kg)

q = 2010 kJ

Heat absorbed by the water as it warms to 100°C:

q = mCΔT

q = (6 kg) (4.18 kJ/kg/K) (100°C − 0°C)

q = 2508 kJ

The total heat absorbed by the ice by heating it to 100°C is 5024.4 kJ.

If the steam is fully condensed, it loses a total of -6888 kJ.

Therefore, the steam does not fully condense.  The equilibrium temperature is therefore 100°C

Answer:

We have various features for generating and conserving body heat and core temperature such as being warm blooded, as well as things like sweating for reducing heat. Most creatures are substantially more sensitive to temperature than we are.

Answer:

This is a pretty open ended question but Imma do the best I can.

When your core temperature is cold enough, the heart has to work extra hard to pump blood to your extremities. so it cuts off blood flow to your fingers and toes, then legs and arms. Your heart is working its hardest to circulate blood to only the vital organs to keep them from dying. If you endure hypothermic temperatures for too long your fingers and limbs can essentially die from not having blood flow to them.

Answer:

If the body temperature falls below this temperature then enzymes will work too slowly for body process to occur fast enough the keep the mammal alive.

Explanation:

Answer:

The Moon revolves around the Earth and rotates on its axis with the same period. • The combined effect of these two motions means that one side of the Moon always faces the Earth.

Answer:

256782

Explanation:302-320+3223

The answer can be illustrated through image attached.

Further it can be seen that A solenoid is a device consisting of a coil of wire, a housing and a movable plunger (armature). When an electric current is applied, a magnetic field is created around the coil, which pulls the plunger inward. More simply, a solenoid converts electrical energy into mechanical work.

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