you throw a rock straight down with an initial speed of 5 m/s. It took 4.5 seconds to hit the ground below. How high was the cliff?

Answer:C) he does less work coming back because the force moving the wagon is only 50cos30

Explanation: got it right on edge

The amount of work Trevor performs going to the corner compared with the amount of work he performs coming back is that   he does less work coming back because the force moving the wagon is only 50cos30°

Since the formula, we refer to for calculating the work, when the angle is applied is:

Wₓ = W cos θ, where for the case the  θ is  30  and W is 50

Since the force done is  parallel to the motion's direction, and the work  has a larger magnitude, the work done in order of pulling the wagon back to the starting point is less than the work done in pulling the  wagon to the corner, as  the reason is for the  angle of 30 degrees in pulling it back

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Answer:

10s [seconds]

Explanation:

[tex]t = \frac{v}{a} [/tex]

The charge for a procedure or accepting fees that are predetermined by the plan is dependent on the patient's ability to pay.

Doctors and surgeons deal with maintaining health as well as diagnosing and treating illnesses and injuries. In addition to conducting physical examinations and medical history inquiries, doctors also order, carry out, and interpret diagnostic tests. Patients frequently receive advice from them on food, cleanliness, and preventative healthcare.

Physician labor is the part of the Medicare Physician Fee Schedule that represents the overhead expenses related to a service.

While precertification gives the provider permission to provide the medical service, preauthorization specifically establishes the dollar amount approved for the medical procedure.

The main distinction between doctors and physicians is that doctors typically specialize in a field of practice while physicians typically have a more general background.

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She will pull her ripcord 22.9 s after the dive and her speed at 490 m will be 112.66 m/s.

Free fall, any motion of a object where gravity is the only force acting upon it. In the context of general relativity, where gravity is reduced to the curvature of spacetime, there are no forces acting on bodies in free fall.

For the given case,

s = ut + 1/2 at²

s = Displacement  (3000 - 420 = 2580 m) it is the distance she will free fall

a = Acceleration due to gravity  (9.8 m/s²)

u = Initial velocity (0 m/s)

t = Time taken

2580 = 0×t + 1/2 9.8 t²

2580 = 4.9 t²

t = 22.9 s

Now her speed at 490 m will be

v = d/t

v = speed

d = 2580 m

t = 22.9 s

v = 2580/22.9

v = 112.66 m/s

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The given question is incomplete so the complete question is as follows:

"if there were no air resistance, how long would it take a free-falling skydiver to fall from a plane at 3100 m to an altitude of 490 m , where she will pull her ripcord? what would her speed be at 490 m ? (in reality, the air resistance will restrict her speed to perhaps 150 km/h)"

Answer:

B

Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!

Answer: You would move backward.

Explanation: You would push back because you would move in the direction of the ball's initial motion.  The ball's initial motion is to come toward you, so you would most likely move backward.

Let me know if this is right! :)

The equal and opposite force for the force of the elevator floor pushing up on the person as described by Newton's third law is the weight and the reaction force from its effect.

This is referred to as a device which is used in the vertical transportation of goods and people among the floors in a buildings.

When an individual steps into the elevator, the weight acts on it and it is known as a downward force while the reaction acts upward in an opposite reaction as described by Newton's third law in this scenario.

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Its length is 6.6m.

Length contraction is a phenomena where a moving object's length is measured to be less than it actually is.

When an object is travelling faster than the viewer, but not at the speed of light, length contraction is seen. The relativity of space and time is the cause of this. The two extremes of a moving object will send out signals like light at somewhat different intervals to an observer watching the thing.

Using the relationship between length contraction,

l = l₀[tex]\sqrt{1-\beta^{2} }[/tex]

β = v/c

l₀ = 10m

v = 0.75c

v/c = 0.75

In place of, we have

l = 10×[tex]\sqrt{1-0.75^{2} }[/tex]

l = 10× 0.66

l = 6.6m.

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307.4 μW/m² average magnitude of the poynting vector 5.00 mi with an average power of 250 kw?

S-average=power/area

power=250 kw

area=4π(8045)²

S-average=250/4π(8045)²

S-average=307.4 μW/m²

Power is produced when a force causes a displacement. Power has no bearing on how long it takes for a force to cause a displacement. The process's pace might range from swiftly concluding to taking some time. For example, it takes an abnormally long time for a rock climber to elevate her body a few meters over the cliff's edge. On the other hand, a trail hiker may swiftly raise her body a few meters if she selects the faster path up the mountain. Despite making the same amount of work, the hiker completes the task far quicker than the rock climber..

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the speed of the projectile is 780m/s.

given in this question,

mass of the gun m₁ =1500metric tun

as we know 1ton= 1000kg

so m₁=1,500,000kg

mass of projectile m₂= 5ton =5000kg

for solving this problem we will use the concept of conservation of momentum.

which is [tex]P_{initial}[/tex]=[tex]P_{final}[/tex]

[tex]P_{initial}[/tex]=0

and [tex]P_{final}[/tex]=m₁v₁+m₂v₂

∵v₁=2.6m/s

now by the conservation of momentum

[tex]P_{i}[/tex]=[tex]P_{f}[/tex]

0=1,500,000×2.6+5000×v₂

v₂=-1500000×2.6/5000

v₂= -780m/s

hence the value of the velocity negative is not possible

negative sign is showing direction of projectile.

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The wavelength of the electromagnetic radiation emitted by your phone is 1.578meters.

The name given to the recognized range of electromagnetic radiation is the electromagnetic spectrum (EMS). The frequency decreases from 3×10²⁶ Hz to 3×10³ Hz as wavelengths rise from around 10⁻¹⁸ m to 100 km.

The wavelength is the separation between two wave crests, while troughs have the same wavelength. Frequency, measured in cycles per second (Hz), is the number of vibrations that pass over a certain location in a second (Hertz).

Given,

Frequency  = 1900 mhz = 1900×10⁶,

velocity = 3×10⁸,

Wavelength = v/F

Wavelength = 3×10⁸/ 1900×10⁶

Wavelength = 1.578meters.

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The earth's atmosphere is transparent to most waves is visible part of the spectrum.

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It is a diagram with the parts of the rainforest labeled

The potential difference measured if the given voltmeter is used and connected to the circuit via the 3V terminal is 1.4 V.

The reading of voltmeter is taken for the row with 0, 1, 2 and 3 values. Each  line indicates 0.1 volts. The distance between each smaller lines indicates 0.2 volts and the distance between each longer lines indicates 0.2 volts.

A voltmeter is a device used to measure the potential difference between two points in a circuit. Potential difference is also called as voltage. Its unit is volts.

V = IR

V = Voltage

I = Current

R = Resistance

Therefore, the potential difference measured is 1.4 V

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342.5 N of force must she exert to stay on if she is 0.891 m from its center while 22.0 kg child is riding a playground merry-go-round that is rotating at 40.0 rev/min

Since we are given the mas of the child  which is  22.0 kg and the number of revolutions which is 40.0 rev/min   which will be  :

n=2*3.14 *40.0 /60  = 4.18 radians/s

and the distance from the center is  0.891 m( r). The formula we are referring to calculates the centripetal force :

F= m(n)²* r

=22(4.18)²*0.891

= 342.49 = 342.5 N

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The correct answer is option C.

The atmosphere of Saturn appear to have only half the helium content of Jupiter because Saturn is so much colder, helium does not show up as strongly in its spectrum.

The planet Saturn is a giant ball of gases including hydrogen, helium and methane. All these gases make up a thick atmosphere of the planet.

In general, the concentration of hydrogen is about 96.3%, helium 3.25% and methane 0.45%.

Clouds on Saturn are composed of ice crystals of ammonia and the temperature is around -400F which is much colder then Jupiter.

Thus, atmosphere of Saturn appear to have only half the helium content of Jupiter because Saturn is so much colder.

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The self inductance of a solenoid is 157.9 * [tex]10^{-4}[/tex] H

Self inductance is defined as the property of a current-carrying coil that resists or prevents the current passing through it from changing.

• It is represented by L

• The unit for the self inductance is Henry denoted by H.

• Mathematically, it is L = ц[tex]N^{2}[/tex]A / l

where

ц is the vacuum permeability = 4π *  [tex]10^{-7}[/tex]

N is the number of turns of the solenoid = 100

A is the area of one loop of the solenoid = π [tex]r^{2}[/tex]

( r = 2m )

A = π [tex]r^{2}[/tex] = 4π

l is its length

So the self inductance of the solenoid will be

L = 4π *  [tex]10^{-4}[/tex] * 100*100 * 4π / (10)

L = 16π² *  [tex]10^{-4}[/tex] H

L = 157.9 *  [tex]10^{-4}[/tex] H

The self inductance of this solenoid is 157.9 *  [tex]10^{-4}[/tex] H

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Based on an object's separation from the Earth, gravitational energy is potential energy that can be stored there.

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The height is 0.32788meters or 31.78 cm.

According to the principle of buoyancy, the weight of a floating body equals the weight of the liquid displaced by its submerged part. Therefore, the ship can float on water. Because its weight is equal to the weight of the water you are trying to displace. Each float displaces the swimming liquid by its own weight. Just like a ship floats freely in the water.

The weight of the container must equal the weight of the volume of water displaced by the container. Displacement is the amount of water a ship displaces. If the buoyancy equals the object's weight, the object will remain buoyant at the current depth. Buoyancy always exists whether an object is floating, submerged, or floating in a liquid. When the boat floats, its weight equals the weight of the volume of water displaced.

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The acceleration of the wheelbarrow is 0.621 m/s^2 .

There will be equal force applied on both side, in that case the object will be having zero motion and zero acceleration.

But in the case when there is more force applied in one direction than other side force then there will be acceleration on the object.

This acceleration is equal to the ΔF/m.

where ΔF is the difference of the forces applied on the both direction

and m is the total mass of the object.

According to the question, we have m = 37Kg

ΔF = (36-13) n = 23 n

so a = 23/37 = 0.621 m/s^2

so acceleration of the wheelbarrow is 0.621 m/s^2 .

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The Kinetic Energy of the given body is 100,000

Kinetic energy is the energy possessed by a body as a virtue of its motion or movement. It is defined under Mechanical energy.

The mechanical energy of a body is always conserved. Potential energy along with Kinetic energy maintains the mechanical energy of a body.

If talking solely about mechanical energy the dip in one leads to a rise in the other.

The potential energy of a body is the energy possessed by the virtue of its position in distance from the surface of the Earth.

The formula of Potential energy is=mgh

where h is the distance from the surface of the earth where the body is placed

while g is the gravitational force exerted by the earth on the body

The formula of Kinetic Energy is: 1/2xmx[tex]v^{2}[/tex]

m=2000kg (Provided in the question)

v=10m/s (Provided in the question)

Then Kinetic Energy of the body=1/2x m x [tex]v^{2}[/tex]

putting values in the equation

K.E=1/2 x 2000 x [tex]10^{2}[/tex]

K.E=1/2 x 2000 x 100

canceling 2000 by 2

K.E = 1000 x 100

K.E= 100,000

Where Kinetic energy is represented as K.E

Thus, the Kinetic Energy of the given body is 100,000

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Knowing the power of the units and the electromagnetic waves is necessary to calculate the net energy unit.

What is power?

Power is the work completed in a given amount of time or time spent working. The joules per second (J/s)-based SI power unit is the Watt (W). Horsepower (hp), roughly equal to 745.7 watts, is sometimes used to describe the power of machines like motor vehicles.

What are electromagnetic waves?

Magnetic and electric fields vibrate together to produce electromagnetic waves, also known as EM waves. In other words, oscillating magnetic and electric fields make up electromagnetic waves (EM).

P=I*A=t=E/t

E=I*A*T

I= 153W/M^2

A=18.2*45.1*10^-4

A=0.082082

t=1.22mins = 1.22*60^S

t= 73.2

applying the formula E=I*A*T

E= 919.2855j

Therefore, the net energy absorbed in 1.22 min is 919.285j.

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The total distance travelled is 100 m.

We know that distance is a scalar quantity. Let us note that scalar quantities are the quantities that do not have a direction rather they do have  magnitude. This is where the vector is different from the scalar quantity in physics.

Looking at this description, we are told that the polar bear walks 40 meters North, then 20 meters East , then 40 meters south. We can see that the total distance can be obtained by the addition of all the distances travelled.

Total distance travelled is; 40 + 20 + 40 = 100 m

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Substances in a mixture keep their separate properties, but in a compound the parts are bonded and do not keep their separate properties.

Mixtures contains elements and compounds without any fixed ratio and not by any means of chemical bonds. The elements and compounds are physically mixed and so they will be visibly distinct.

Compounds contains elements in a fixed ratio and is connected by chemical bonds. They only contain one type of molecule. Since they are chemically combined the particles appear as one and is not visibly distinct.

Therefore, substances in a mixture keep their separate properties, but in a compound the parts are bonded and do not keep their separate properties.

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The ball will continue to advance at a speed of 2.0 m/s once it rolls off the edge of the table until it lands on the ground after 0.45 seconds.

The ball is behaving just like it has been dropped. Nature is unconcerned by the fact that it is also advancing.

D=1/2gt2 and T=√2d/g

By entering the table's height and the gravitational acceleration, we can calculate the time in seconds:

t= √2(1.5m)/9.8m⋅s−2 = 0.553s

So, for a little bit longer than a half-second, the ball will be in the air (and thus able to move ahead). To find the distance travelled, we simply reverse the speed equation, s=dt, and insert in the speed and time:

d= 20m/s(0.553s)= 1.11m

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T[tex]_{C}[/tex] = 25 + 273.15 = 298.15K

T[tex]_{H}[/tex] = 477 + 273.15 = 750.15K

And by replacing Carnot efficiency:

e = 1 - [tex]\frac{298.15}{750.15}[/tex] = 0.39475 = 39.47%

W[tex]_{max}[/tex] = e × Q[tex]_{H}[/tex] = 0.39475 × 65000[tex]\frac{KJ}{min}[/tex] = 25658.75  [tex]\frac{KJ}{min}[/tex]

The United States (and its connected territories) and some Caribbean countries frequently use the Fahrenheit temperature scale, which bears the name of German physicist Daniel Gabriel Fahrenheit. Water freezes at 32°F and boils at 212°F according to the Fahrenheit scale (at sea level).

Nearly every other country uses the Celsius temperature scale, which was previously called centigrade before being changed for Swedish astronomer Anders Celsius. Water freezes at 0°C and boils at 100°C on the Celsius scale (at sea level).

For this case we can use the fact that the maximum thermal efficiency for a heat engine between two temperatures are given by the Carnot efficiency:

e = 1 - frac T[tex]_{C}[/tex]T[tex]_{H}[/tex]

We have on this case after convert the temperatures in kelvin this:

T[tex]_{C}[/tex] = 25 + 273.15 = 298.15K

T[tex]_{H}[/tex] = 477 + 273.15 = 750.15K

And replacing in the Carnot efficiency we got :

e = 1 - [tex]\frac{298.15}{750.15}[/tex] = 0.39475 = 39.47%

And the maximum power output on this case would be defined as:

W[tex]_{max}[/tex] = e × Q[tex]_{H}[/tex] = 0.39475 × 65000[tex]\frac{KJ}{min}[/tex] = 25658.75  [tex]\frac{KJ}{min}[/tex]

Where [tex]Q_{H}[/tex] represent the heat associated to the deposit with higher temperature

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(a) The acceleration (in m/s²) of the two blocks is 4.42 m/s².

(b) The tension (in N) in the string connecting the blocks is 63.65 N.

The acceleration of the blocks is determined by applying Newton's second law of motion as shown below.

F(net) = ma

where;

F = m₁a + m₂a

F = a(m₁ + m₂)

a = F/(m₁ + m₂)

where;

a = (153) / (14.4 + 20.2)

a = 4.42 m/s²

The tension (in N) in the string connecting the blocks is calculated as follows;

T = m₁a

T = 14.4 x 4.42

T = 63.65 N

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Given that A was stiffer than B (KA > KB), the force given to both springs is the same for A, whose spring constant is higher than B's but whose expansion is smaller, and whose work will thus be less than B's.

The equilibrium length of a perfect spring exists. When a spring is squeezed, a force pushing each end apart has a magnitude proportional to the length drop from the equilibrium length.

Hooke aimed to show how a spring's elasticity and the forces acting on it are related. According to Hooke's Law, a spring's extension is proportional to the load placed on it. As long even as load does not exceed a material's elastic limit, a variety of materials abide by this rule.

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To determine the direction of the magnetic field of the current-carrying wire in the vicinity of the loop, you can use the right-hand rule.

If you're confused of what the direction of the magnetic field around a current-carrying wire is supposed to be, you can use the right-hand rule to conveniently figure out the direction. To use this right-hand rule, first curl your right-hand fingers and then point your right thumb in the direction of the current in the wire. Your right-hand fingers will be curled in the same direction as the direction of the magnetic field around the current-carrying wire.

There is another type of the right-hand rule. This type of right-hand rule is used to identify the direction of axes or parameters that point in three dimensions.

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Answer:

11.56 m/s

Explanation:

The momentum of the ball is transferred into the pin so the transfer of momentum has the formula, m1*v1 = m2 * v2

substituting the values,

5.1 * 3.40 = 1.5 * V2

17.34 = 1.5 * V2

V2 = 17.24 / 1.5

V2 = 11.56 m/s