the visible surface of the sun is composed of solid matter.
a. true
b. false

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 average speed of a particle in the position X=3t-3t² is 18m/s

At the position X = 3t - 3t²

t₁ = 1s = X = 3(1) - 3(1)²

X = (3 x 1) - (3 x 1²)

X = 3 - 3 = 0m

At t₂  = 3s = X = 3(3) - 3(3)²

X = (3 x 3) - (3 x 3²)

X = 9 - 27 = -18m

Displacement, Δx = X₂ - X₁

= -18 - 0 = -18m

The change in time would then be

Δt = t₂ - t₁

= 2 - 1 = 1

The Average velocity can be calculated by dividing the change in displacement by the change in time, Vₐ = Δx/Δt

Vₐ = -18m/1s = -18m/s

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The definition of angular momentum (L), with some simplification, is the object's distance from the rotation axis multiplied by the linear momentum: L = r*p or L = mvr.

In rotations about an object's symmetry axis, the angular momentum The product of an object's moment of inertia I and its angular velocity about the selected axis is known as L. L = Iω. The characteristic of any rotating object determined by the product of the moment of inertia and the angular velocity is known as angular momentum. It is a characteristic of rotating bodies determined by the sum of their moment of inertia and angular velocity.

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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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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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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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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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In amplifiers, the coupling and bypass capacitors appear to be shorts to ac at the mid band frequencies.

At low frequencies the capacitive reactance, XC, of these capacitors affect the gain and phase shift of signals, so they must be taken into account.

[tex]\alpha =\frac{1}{2\pi f}[/tex]

At lower f, the internal capacitances have a very high Xc like opens and have no effect on the transistor’s performance. However, as the frequency goes up (at high f), the internal  capacitive reactances go down and they have a significant effect on the transistor’s gain and also it introduces a phase shift; it has the inverse effect to the coupling capacitor.

Miller’s theorem states that C effectively appears as a capacitance from input to ground is as given below-

[tex]Cin= C(A+1)[/tex]

[tex]Cout=\frac{CA +C}{\alpha }[/tex]

This shows the effective input and output capacitance.

Critical frequency is given as -

[tex]\alpha = \lim_{n \to \infty} a_n[/tex]

= 10 log(0.5)

=-3dB

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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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Answer:

it increases

Explanation:

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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A hot-air balloon be flown on the moon, buoyancy force wouldn't exist because there isn't any cold air to replace it.

What is density?

Density: Solid substance mass per unit volume M stands for mass and V for volume, and the formula for density is d = M/V. Grams per cubic centimetre is the unit of density that is most frequently used.

What is gravity?

The ratio of a substance's density (mass per unit volume) to a given reference material, frequently a liquid, is known as its specific gravity. The density of a substance (g/mL) equals the specific gravity of water at the same temperature (g/mL).

What is buoyancy ?

Buoyancy is the tendency of an object to float in a fluid. When there is gravity present, an upward force known as the buoyant force is felt by any object submerged in a liquid or gas. Pressure differences acting on an object's opposing sides cause buoyancy when it is submerged in a static fluid.

The buoyancy force wouldn't exist because there isn't any cold air to replace it.

Therefore, Could a hot-air balloon be flown on the moon, buoyancy force wouldn't exist because there isn't any cold air to replace it.

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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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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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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:

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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The expected ratio of free-hanging earlobes to attached earlobes in the offspring is 1:2.

The diagram depicts a Punnett square used to predict the earlobe shape of two parents' offspring. The capital A represents free-hanging earlobes, while the lowercase a represents attached earlobes.

The Punnett square is a square diagram used to predict genotypes of a specific cross or breeding experiment. It is named after Reginald C. Punnett, who invented it in 1905. Biologists use the diagram to calculate the likelihood of an offspring having a specific genotype.

In this case, the genotype rato based on the attached diagram is 1:2.

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The other forms of electromagnetic radiation you think could be ionizing are x-rays and gamma rays.

Ionizing radiation, including nuclear radiation, consists of subatomic debris or electromagnetic waves which have sufficient strength to ionize atoms or molecules by using detaching electrons from them.

Electromagnetic radiation consists of waves of the electromagnetic subject, which propagate thru an area and deliver electromagnetic radiant electricity. It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. All of those waves form part of the electromagnetic spectrum.

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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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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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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 principle that properties such as mass, volume, and number remain the same despite changes in the forms of objects is called the principle of conservation.

The concept of preservation is the idea that the quantity does not change even if the appearance changes. The same is true for variables such as volume, quantity, and area. The ability to understand that the distribution of matter does not affect its mass, quantity, volume, or length is more specifically what is meant by conservation.

In physics, a conservation law states that particular a particular measurable system does not change as the system evolves over time.

The principal has 6 laws which are

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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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Answer:3 the highest 1 the lowest

Explanation:

When the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest, so option B is correct.

When describing how much electricity flows through a circuit and how it flows in an electronic circuit, the term "electric current" is often employed. It is measured in amperes (A). The ampere number rises as more electricity flows through the circuit.

Given:

The Voltage in the circuit, V = 1.5 volts,

The resistance in the circuit, R = 50 Ω,

As you can see in the third diagram, there is a parallel connection of the bulb, so the voltage in the circuit will remain the same and the current depends on the resistor, so there will be higher resistance in this circuit.

And if the resistance is high the current flow will be low, (By Ohm's law)

In the first circuit, there is only one bulb, so resistance will be low, and the current flow will be high.

Therefore, when the switch is closed, in the third circuit the resistance would be the highest and the current be the lowest.

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Our Solar System is contained within the Milky Way galaxy, which gets its name from how it appears to us on Earth: a hazy ribbon of light visible in the night sky made up of stars that are too close together to be seen individually.

Our galaxy is around 100,000 light-years big and likely includes 100 to 400 billion stars. That sounds enormous, and it is—at least until we start putting it in the context of other galaxies.

The Milky Way is a massive cluster of stars, gas, and dust. Because it would appear to be a spinning pinwheel from the top or bottom, this galaxy is known as a spiral galaxy. About 25,000 light-years from the galactic center, on one of the spiral arms, is where the Sun can be found.

Spiral nebulae are objects that resemble spiral-shaped clouds but which are actually galaxies outside of our Milky Way galaxy.

Shapely asserted that what were then referred to as "spiral nebulae," such as Andromeda, are nearby and far smaller than the Milky Way, and that the Milky Way is so large that it is the main object in the cosmos.

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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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Answer in attachment

Assume: This collision takes place in outer space where there is no gravitational field and no friction. A small piece of putty of mass 31 g and negligible size has a speed of 2.5 m/s. It makes a collision with a rod of length 3 cm and mass 83 g (initially at rest) such that the putty hits the very end of the rod. The putty sticks to the end of the rod and spins around after the collision. After the collisions the center-of-mass has a linear velocity V and an angular velocity ω about the center-of-mass “+ cm”. What is the velocity V of the center-of-mass of the system after the collision? Answer in units of m/s.  Icm = 1/12 MR^2 Ipm = MR^2 The Attempt at a Solution First I said that that the moment of inertia for the system is I=1/12(M+m)R^2 ("M" being the mass of the rod and "m" being the mass of the putty) Then using conservation of angular momentum i got: mR^2w = (R^2/12)(M+m)w substituting the respect v's (and Rs) in for w i got: mv1R = (R/12)(M+m)v2 then v2 = 12mv1/(M+m) plugging in my numbers i got [12(31)(2.5)]/[(31+83)] = 8.16 m/s

Energy transformations that occur between the microwave oven and the meal when a cook heats a meal in a microwave oven is electrical energy to electromagnetic energy to thermal energy.

Microwaves are one of many different forms of energy that occur in nature. Other forms include visible light, radio waves, and X-Rays. Microwaves are very short waves, hence the prefix micro- , which means "small." When microwaves hit water molecules, for example, the water molecules begin to bounce around, hitting against one another. Something hitting against something else causes friction. Friction produces heat, which can be used to cook food.

How do microwaves cook?
Microwaves are absorbed by the water, fats, and sugars in food and are converted into heat, which cooks the food. Because most plastics, glass, and ceramics do not absorb microwaves, the microwaves heat food without heating the container or the inside of the oven. If a container is hot when you take it out of the microwave oven, it is because the hot food has conducted heat to the container.

So basically, microwave oven is electrical energy (microwave oven needs to be plugged into power outlet to turn it on) into electromagnetic energy (where the wave of energy starts to travel and absorbed by the water, fats, and sugars in food) into thermal energy (which comes from the molecule begin to bounce around, hitting against one another, that will cause friction which produces heat and can be used to cook food).

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One of the benefits of keeping your supplies stocked and your electronics in a perfect working condition is that:

It makes sure your work does not take too long

In a normal system and environment, the importance of keeping goods or supplies well cannot be overemphasized. In such a system, when customers comes to get goods, it makes it easier for them to release as it won't take much time presenting it.

That being said, our electronics too, when they are in a perfect order of arrangements, puts them in good condition.

In conclusion, when we keep supplies stocked, it helps to saves time.

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