. ****an elastic cord is 80. cm long when it is supporting a mass of 10. kg hanging from it at rest at rest. when an additional 4.0 kg is added, the cord is 82.5 cm long. hint: 4 kg stretches the cord 2.5 cm!!

Answer:

Explanation:

Given:

R = 18 Ohm

U = 9.0 V

__________

I - ?

Ohm's law:

I = U / R

I = 9.0 / 18 = 0.5 A

In florida, after three months, a driver with a learner's permit may drive until 10 P.M.

According to the Florida Department of Highway Safety and Motor Vehicles (HSMV), a learner's daytime license only permits you to drive until 10 p.m. and only during daylight hours for the first three months.

What is learner's liscense?

A learner's permit serves as a restricted driving license that permits a person to practice driving in open spaces around the nation while accompanied by someone who has a regular driving permit.

Therefore, In florida, after three months, a driver with a learner's permit may drive until 10 P.M.

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In florida, after three months, a driver with a learner's permit may drive until 10 P.M.

What is learner's liscense?

A learner's permit serves as a restricted driving license that permits a person to practice driving in open spaces around the nation while accompanied by someone who has a regular driving permit.

According to the Florida Department of Highway Safety and Motor Vehicles (HSMV), a learner's daytime license only permits you to drive until 10 p.m. and only during daylight hours for the first three months.

Therefore, In florida, after three months, a driver with a learner's permit may drive until 10 P.M.

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Answer: Transition metals

Explanation:

Such an orbit places a satellite at a height of around 35,786 km (22,236 mi) above mean sea level. At relation to the surface of the Earth, it remains in the same place.

A prograde, low-inclination orbit with a period of 23 hours, 56 minutes, and 4 seconds is known as a geosynchronous orbit (GEO). Even if it may seem to move north and south, a spacecraft in geosynchronous orbit appears to stay above Earth at a constant longitude.

what is geosynchronous orbit?

The word "geosynchronous" describes the satellite's orbital period, which allows it to be in phase with the rotation of the Earth ("geo-"). In addition to the criteria for orbital time, the satellite must also be situated in an orbit that places it close to the equatorial in order to qualify as geostationary.

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Such an orbit places a satellite at a height of around 35,786 km (22,236 mi) above mean sea level. At relation to the surface of the Earth, it remains in the same place.

What is geosynchronous orbit?

The word "geosynchronous" describes the satellite's orbital period, which allows it to be in phase with the rotation of the Earth ("geo-"). In addition to the criteria for orbital time, the satellite must also be situated in an orbit that places it close to the equatorial in order to qualify as geostationary.

A prograde, low-inclination orbit with a period of 23 hours, 56 minutes, and 4 seconds is known as a geosynchronous orbit (GEO). Even if it may seem to move north and south, a spacecraft in geosynchronous orbit appears to stay above Earth at a constant longitude.

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Light bends around the obstacles like the waves and this bend cause the diffraction pattern. single slit shows a diffraction pattern because of the path length difference from waves originating at different parts of the slit.

The double-slit experiment demonstrates that mild and remember can show traits of each classically described wave and debris; moreover, it presents the fundamentally probabilistic nature of quantum.

Mechanical phenomena. young's authentic double-slit experiments have been in fact the primary to illustrate the phenomenon of interference. when he shone mildly via two slender slits and determined the sample created on the display screen, the younger did not locate brilliant regions similar to the slits, however as an alternative noticed vivid and darkish fringes.

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If a 69.87 kg person ate 181 calories worth of sugar and they converted all of that energy to heat immediately, the change in temperature of that person  is 3.609 ºC.

What is calorie?

To calculate the change in temperature resulted from the intake of food calories or energy generated in Joules we use the formula,

Energy(Joules) = mass of the body (g) x specific heat of the body(J/gºC.) x change in temperature (ºC)

Let us assume that the average specific heat of the person's body is 3.00 J/gºC.

Using the above formula we find the change in temperature as-

181 x 1000 cal/ 1cal x 4.18 J/1 cal = 69.87 x 1000 x  3.00 J/gºC. x ΔT

ΔT = 181 x 1000 x 4.18/ 69.87 x 1000 x 3

     = 3.609

Hence, the change in temperature of that person is 3.609 ºC.

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When the object is a sphere of Radius R and mass M the 60% of its total kinetic energy is its translational kinetic energy.

The kinetic energy of an object is termed as the energy it posses because of its motion.

The translational kinetic energy is the energy required to move or accelerate the object from its position of rest.It is described as the effort required to move a mass-determined body from rest to the indicated velocity.

The moment of inertia of the object will be⇒I =2/3MR2

Sphere is rolling without slip ,v=Rω (v= speed of centre of mass and ω is angular speed)

Translational KE =1/2Mv2

Rotational KE = 1/2Iω2=1/2(2/3MR2)x(V/R)2=1/3Mv2

Total KE= 1/2Mv2 +1/3Mv2 =5/6 Mv2

Now % of Translational Energy= 1/2Mv2 ÷ 5/6 Mv2 x100 = 60%

Hence, when the object is a sphere of Radius R and mass M the 60% of its total kinetic energy is its translational kinetic energy.

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The gravitational pull of the earth on Samantha is 3.6 x 1022, which is the force that pulls objects toward the center of a planet or other body.

Gravity is the downward force or pull that the earth exerts on your body. Your body's mass was concentrated at the point where your center of mass is located. Gravity center The center of gravity of the human body is a notional position where the gravitational force is also said to appear to act (COG).

Every physical thing in the universe is impacted by the gravitational force, also known as gravity. Any two non-zero mass objects or particles will gravitationally tend to gravitate toward one another. Gravity has an impact on everything, from atomic particles to galaxy clusters.

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Answer: It can cause an object to accelerate.

It can cause an object to stop moving

It can cause an object to start moving.

It can cause an object to change directions.

It can cause an object at rest to remain at rest.

Explanation:

The magnetic field 35.0 cm away from the middle of the straight cord, in the plane of the two wires is 1.96 T j

A magnetic field is a vector field that explains the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force that is perpendicular to both its own velocity and the magnetic field.

The magnetic field is a technique used to describe how magnetic force is distributed in the space surrounding and within something magnetic in nature.

Given,

A long household extension cord's two conductors carry equal 5.00-a currents in opposite directions at the same time.

And also given that the two wires are 3.00 mm apart.

Let B₁ be inside the plane and B₂ be outside the plane.

It is required to calculate the magnetic field at point A

The directions of the magnetic field  at A can be calculated using Right hand rule.

[tex]B_{net}[/tex] = B₂ -B₁

[tex]B_{net}[/tex]=μ₀I/2Π(0.35-(3×10⁻³)/5) - μ₀I/2Π(0.35+(3×10⁻³)/5)

[tex]B_{net}[/tex]= 1.96×10⁻⁹ TJ

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When a slide needs to be in focus at a greater magnification after being properly focused, it is known as a compound microscope in microscopy.

Compound microscope definition. A high-resolution microscope with two sets of lenses produces a two-dimensional image of a sample. When more than a lens is used in the microscope, it is referred to as a compound lens. Additionally, one of the varieties of optical microscopes is the compound microscope.

Compound microscopes are used to look at tiny samples that are invisible to the. These samples are frequently put on slides for viewing under a microscope. When utilizing a stereo microscope, slides are not required because there is more room under the lens for larger objects like rocks or flowers.

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Injection molding is a method to obtain molded products by injecting the plastic material molten by heat into a mold, and then cooling and solidifying these products. The method is suitable for the mass production of products with different and complicated shapes, and takes a large part in the area of plastic processing.

There are four stages in the cycle. These stages are the clamping, injection, cooling and ejection.

For example, there are several products and industries where injection molding is used, like in producing toys, bottle caps, surgical devices, jewel boxes, and even automotive components.

Separate materials can be combined in one part in a type of injection moulding defined as a two-shot mould. This technique can be used to add a soft touch to proper plastic products, add colours to a part or produce items with different performance levels.

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Injection moulding is a method to obtain moulded products by injecting the plastic material molten by heat into a mould, and then cooling and solidifying these products.

Define injection molding?

Injection moulding is a manufacturing process that involves injecting molten material into a mould. Injection moulding can be done with a variety of materials, the most frequent of which being metals (for which the technique is known as die-casting), glassware, elastomers, confections, and, most typically, thermoplastic and thermosetting polymers. The part material is supplied into a heated barrel, mixed (using a helical screw), and injected into a mould cavity, where it cools and hardens to the cavity's configuration. After a product is designed, a mould-maker (or toolmaker) creates moulds from metal that are precision-machined to form the intended part's features. Injection moulding is commonly utilised for producing a wide range of parts, from small components to whole automotive body panels.

Injection moulding is a method to obtain moulded products by injecting the plastic material molten by heat into a mould, and then cooling and solidifying these products. There are four stages in the cycle. These stages are the clamping, injection, cooling and ejection.

For example, there are several products and industries where injection moulding is used, like in producing toys, bottle caps, surgical devices, jewel boxes, and even automotive components.

Separate materials can be combined in one part in a type of injection moulding defined as a two-shot mould. This technique can be used to add a soft touch to proper plastic products, add colours to a part or produce items with different performance levels.

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To learn about the focal length and magnification to solve this problem.

What is focal length?

The focal length of a narrow lens in air is measured from the lens's center to its primary foci, also known as focal points. The focal length of a converging lens, such as a convex lens, is positive and determines how far a collimated light beam must travel to focus on a single point.

What is magnification?

The size of a picture in relation to the size of the item that created it is known as magnification in optics. The term "linear" magnification—also referred to as "lateral" or "transverse" magnification—describes the ratio of image length to object length as measured in planes perpendicular to the optical axis.

Given U₀ = 3cm, f₀= 2.5cm, v₀=mage distance for objective lens

1/f₀= 1/v₀- 1/u₀

1/v₀=1/f₀+1/u₀=1/2.5-1/3

v₀= 3*2.5/3-2.5= 15cm

Object distance for eye piece =20−15=5cm

Given Ue= -5cm, Fe= 6cm, Ve = image formed by eye piece

1/Ve= 1/Fe +1/ Ue= 1/6-1/5

Ve=-30cm

magnification m = -L/F₀*25/Fe

where L is the length of the microscope

here L= 20 cm

m= -20/25*25/6= -33.33

Therefore, the focal length is 15cm and the magnification is 33.33 cm.

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In a volumetric pipette which has an uncertainty of 0. 01 cm³, for a measurement of 0. 20cm3, the lowest possible value is 0.195 cm³

and highest possible value is 0.205 cm³.

Measurement uncertainty = 0.01 cm³

Error = uncertainty value/2 = 0.01/2  = 0.005 cm³

The formula to calculate the possible values for a volumetric pipette with uncertainty0.01 cm³ is give below.

Possible values = measured value ± Error.

Lowest possible value = 0.20 - 0.005

                                     = 0.195 cm³

Highest Possible Value = 0.20 + 0.005

                                      = 0.205 cm³

Thus, for a volumetric pipette, the lowest possible value is 0.195 cm³ and highest possible value is 0.205 cm³.

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The shaved camel has more evaporation than unshorn camel so it needs more water.

In order to lower the bog, the sweat, or more specifically its evaporation, cools the air around the body.

why does camels produce little sweat and urine?

A camel can easily withstand extreme temperatures.

Most of a camel's fat is deposited in its humps, unlike many other mammals, allowing for improved thermoregulatory.  It is easier for them to release heat from their bodies in warmer climates. Camels seldom ever perspire. They are far better able to withstand the heat than we are.

During the day, their body temperature fluctuates, rising with the greater outside warmth and falling at midnight when it is colder. Although it may seem odd that camels have fur when they live in such desert areas, their hairs really act as insulation to keep them cool.

Therefore, The shaved camel has more evaporation than unshorn camel so it needs more water.

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The shaved camel has more evaporation than unshorn camel so it needs more water. In order to lower the bog, the sweat, or more specifically its evaporation, cools the air around the body.

Why does camels produce little sweat and urine?

A camel can easily withstand extreme temperatures. Most of a camel's fat is deposited in its humps, unlike many other mammals, allowing for improved thermoregulatory.  It is easier for them to release heat from their bodies in warmer climates. Camels seldom ever perspire. They are far better able to withstand the heat than we are.

During the day, their body temperature fluctuates, rising with the greater outside warmth and falling at midnight when it is colder. Although it may seem odd that camels have fur when they live in such desert areas, their hairs really act as insulation to keep them cool.

Therefore, the shaved camel has more evaporation than unshorn camel so it needs more water.

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The top five books must be pushed off the bottom one with 5 N of horizontal force.

The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. Each of the six books weighs five pounds, therefore we need to slide five of them.

them, where 55 = 25N

The following formula can then be used to get the friction force.

F = N μ

where F is the frictional force, N is the force, and is the static friction coefficient

F= (25 N) (0.2) (0.2)

F= 5 N

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The speed of the ball at the bottom of the ramp is obtained by taking the square root of 2 times gravity times height of the ramp (v = √2gh).

The speed of the ball at the bottom of the ramp is calculated by applying the principle of conservation of energy as shown below.

According to principle of conservation of energy;

kinetic energy of the ball at bottom of the ramp = potential energy of the ball at the maximum height of the ramp

K.E(bottom) = P.E(top)

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

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Bohr atomic model can not predict spectra for multielectron atom.

What is Bohr atomic model?

The Bohr model postulates  that  the electrons are orbit the nucleus at fixed energy if levels. Orbits further from to the nucleus to exist at highest energy levels.

Sol-

Bohr’s theory was unable to  explained the followings observations :
i) Bohr’s model could not explain the spectra of atoms containing more than one of  electron.

ii) It never not explain the Zeeman effect.
In presence of the magnetic of field, each of  spectral line gets split up to into fine lines, the phenomenon is known as Zeeman effect.

iii) It could not explain the to Stark effect.
In presence of the electric of field, each spectral line gets split up into fine lines, the phenomenon is known as as the Stark effect.

iv) The main objection to the Bohr’s model was raised by Heisenberg’s uncertainty principle.
According to the  Heisenberg’s uncertainty principle, it is impossible to determine the simultaneously the exact position and the momentum of a small moving particle like an electron.

But, according to Bohr’s model electron moves in well-defined orbits around the nucleus, and hence its position, as well as momentum, can be determined simultaneously, which is against the of  uncertainty principle.

So, electron moves in well-defined orbits around to the nucleus is impossible.

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Answer: 0N; the rope will remain stationary

Explanation: Connexus

Net force applied on the rope is 0 N and the rope will stay stationary.

An object's push or pull is seen as exerting a force. The interaction of the objects produces push and pull. You can also use words like stretch and squeeze to describe force.

The definition of force in physics is: The push or pull on a mass-containing item changes its velocity.

Given that:

One student pulls to the left with a force of 35 N.

Another student pulls to the right with a force of 35 N.

Hence, these forces act in opposite direction.

Net force applied on it = 35 N - 35 N = 0 N.

So, the net force of zero newton being applied to the rope, and the rope remains stationary.

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The total work done if a system gains 612 KJ of heat, resulting in internal energy of the system equals to 246 KJ  would be -366 KJ

What is the internal energy of the system?

Internal energy can be defined as the property that defines the energy of a substance in the absence of effects due to capillarity,  external electric and magnetic fields

In the above case

Let Change in internal energy ΔU = 246 kJ

Let Heat gained by the system (q) = 612 kJ

Using the  First law of thermodynamics

ΔU = q + w

Where:

ΔU  represent  change in internal energy

q represents  heat added to the system

and w is work done.

Let plug in the formula

246 kJ = 612 kJ + w

w = 246 kJ - 612 kJ

w= - 366 kJ

Here the negative sign means  that work is done by the system.

Therefore, The total work done if a system gains 612 KJ of heat, resulting in internal energy of the system equals to 246 KJ  would be -366 KJ

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The air-filled table tennis ball is the first to reach the terminal velocity.

No, the water-filled table tennis ball will be the first to hit the ground.

The maximum velocity attained by an object as it falls through a fluid is known as terminal velocity.

It demonstrates that the terminal velocity of a body is directly related to the object's weight for the same radius.

The lighter air filter table tennis is the first to attain terminal velocity. Because its mass is lighter for the same shape and size, the friction force of upward resistance equals the downward force of mg sooner. To hit If the terminal velocity of the water-filled table tennis ball is greater and it strikes the ground first, the force of gravity on the ball increases.

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The correct answer of branch circuit conductors can be protected by a circuit breaker with a rating no greater than should be 125 amps.

What Size Wire Do We Need for My Breaker?

The accepted system for this measurement is AWG. A smaller wire size is indicated by a greater number in the wire gauge scale, which runs from high to low.

The circuit conductors between the outlet and the final overcurrent device protecting the circuit are referred to as branch circuits (s).

The circuit conductors between the outlet and the final overcurrent device protecting the circuit are referred to as branch circuits (s). If the conductors are on the load side of the final branch circuit overcurrent device, even conductors for a circuit rated at 1000 amps are a branch circuit.

The branch-circuit conductors that supply loads other than those listed in 210.3 and other than the cooking appliances covered by 210.19 must have an ampacity sufficient for the loads served and must not be lower than 14 AWG.

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45 m/s is the car's speed at the time of impact.

m=1000 kg

F=90 kN= 90000 N

T= 0.5 seconds

F=mv/t

v=Ft/m

v=90000×0.5  ÷1000

V=45 m/s

Speed is a scalar variable that expresses how much an object's location varies over time or how much it moves per unit of time. It is frequently abbreviated as "s."

The distance traveled by an object during a period of time divided by the length of the period gives the average speed of the object throughout that period.

The speed-related measures are time divided by distance. The most prevalent unit of speed in daily life is the kilometer per hour (kph), but the SI measure of speed is the meter per second (m/s).

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The work done by tension force of 14N applied on the laptop by a rope as it moves 2.0 mm up the slope is 0.028 J

W = F d cos θ

W = Work done

F = Force

d = Displacement

θ = Angle between force and displacement vector

F = 14 N

d = 2 mm = 0.002 m

θ = 0

W = 14 * 0.002 * 1

W = 0.028 J

Work done is the change in energy of an object. So if an object moves a certain distance, work is done on the object. If the force and displacement are perpendicular to each other there is no work done on the object.

Therefore, the work done by tension on the laptop is 0.028 J

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Iodine sublimates and reacts with the compounds on the produced TLC plate when it is placed in the chamber and covered, producing yellow-brown spots.

Iodine interacts with many different chemical molecules to produce colorful complexes, which causes coloration. About half of the possible chemicals will work with this stain. For every step see attached file.

Because complexation is reversible and the original chemical will eventually remain on the TLC plate when the iodine has evaporated, this procedure is regarded as "semi-destructive." It is potentially feasible to utilize a different visualization method on the TLC plate after the coloring fades, though it's likely the compound may already have evaporated by then.

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The conservation of momentum can be used to determine the final velocity. The block and bullet system's velocity after the collision will be 2.5 m/s.

For example, a circular path's direction is always perpendicular to a line from the point to the circle's center. A point always moves in a direction that is tangent to its path (a radius). Using the momentum principle,

Where,

= bullet weight, 20 g, or 0.2 kilogram

250 m/s is the bullet's speed before colliding.

= block weight = 2 kg

= velocity following impact =?

Fill out the formula with the values,

Therefore, the block and bullet system's velocity following the collision will be 2.5 m/s.

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Land surfaces being darker absorb much more solar radiation than water. . Water leads in reflecting the  most solar radiation that reaches the surface back in to the atmosphere.

How does this occur?

Sand heats up faster than water because it contains a lower specific heat. Water one the other hand requires one calorie of energy to raise the temperature of one gram of water by one degree Celsius. Sand takes 19 calories per gram to raise the temperature of the sand by 1 degree Celsius.  While Sand requires fewer calories to raise its temperature one degree Celsius and that’s why it heats up faster than water.

Land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy.

Therefore during this experiment the  Sand did heat up much faster than water during this experiment. This happened because of the specific heat of the sand caused it to start heating up rapidly under the lamp as the time went.

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The effect on K₁/K₂ on changing the quantities are :

a)If the mass of 1 is double the mass of 2, and the speeds are the same, then ratio is 2 times

b)If the speed of 1 is double the speed of 2, and the masses are the same, then ratio becomes 4 times.

c)If The mass of 2 is double the mass of 1, and the speeds are the same, then ratio becomes half.

d)If The speed of 2 is double the speed of 1, and the masses are  same, then ratio becomes 1/4 times.

e)If The speed of 1 is double the speed of 2, and the mass of 2 is double the mass of 1,then ratio becomes half.

We know that kinetic energy of any body is given by (1/2)mv² where m is the mass of the body and v is the velocity of the body.

Hence, the ratio of K₁/K₂ is changing  on  changing one or both of these parameters

a) when mass of first body is doubled then K₁ becomes 2 times of initial kinetic energy, then ratio will become twice of the initial value.

b)when speed of first object is doubled then kinetic energy of first object will becomes 4 times of initial energy ,therefore the ratio becomes 4 times of initial ratio.

c) If The mass of 2 is double the mass of 1, and the speeds are the same then in that kinetic energy of 2nd object will become twice of initial kinetic energy, therefore ratio  will become half.

d)  If The speed of 2 is double the speed of 1, and the masses are  same then ratio becomes 1/4 times of initial ratio.

e) If The speed of 1 is double the speed of 2, and the mass of 2 is double the mass of 1, then in that case ratio becomes half of initial ratio,

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(Complete question) is:

Kinetic energy depends on both the mass of an object and on its speed.  Ki the kinetic energy. Using the ratio K₁/K₂ to see how changing one or both of these parameters changes the kinetic energy. Match each case with the correct value of ratio K₁/K₂. 1) The mass of 1 is double the mass of 2, and the speeds are the same.2) The speed of 1 is double the speed of 2, and the masses are the same.  3) The mass of 2 is double the mass of 1, and the speeds are the same. 4) The speed of 2 is double the speed of 1, and the masses are the same. 5) The speed of 1 is double the speed of 2, and the mass of 2 is double the mass of 1.

The radiopharmaceutical is important in radioisotope imaging because it must be able to show the required organ correctly. The equivalent resistance is 2.72 ohm and the current is  44.1 A.

We know that when a circuit have been connected in parallel then it means that the resistors have been connected to a common junction. It is clear that we have the circuit that have the resistors;  5.0 Ohms, 10.0 Ohms and 15.0 Ohms.

We then have;

1/R = 1/5 + 1/10 + 1/15

1/R = 0.2 + 0.1 + 0.067

R = 2.72 ohm

The current in the circuit can be obtained from;

I = 120 V/ 2.72 ohm

I = 44.1 A

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