Determine the time that a paper airplane will fly with an initial velocity of 3.5 m/s

A. 0.36 seconds
B. 2 seconds
C. 3 seconds
D. 0.5 seconds

Answer:

130+60=190

Explanation:

i.e. if you asked for the distance covered by the person

Dilution is needed to bring the unknown’s absorbance within the range of the standard curve.

If the dilution procedure is documented, it is possible to calculate the full-strength concentration after determining the diluted unknown quantity. Beer’s Law only applies to diluted solutions; hence it is preferable to dilute the unknown than to create new standards.

Spectrophotometers gauge transmittance (T) and absorbance (A) (T). Photons per second are used to quantify the light’s intensity. A blank sample, which does not absorb light when light passes through it, is represented as (I).

The principle of the spectrometer. The spectrophotometer is a device that calculates how much light a substance absorbs.

The spectrophotometer measures the light intensity of a sample by passing a light beam through it.

A spectrophotometer is a device that counts the number of photons (light’s energy) absorbed after they have passed through a sample solution.

The spectrophotometer can also be used to determine the concentrations (amounts) of known chemical substances.

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tTO = 26.8 sis the time needed to take off a plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long.

Time is the ongoing pattern of existence and things that happen in what seems to be an unbreakable succession from the past through the present and into the future. It is a constituent quantity of many measurements that are used to compare the lengths of events or the gaps between them, to compare the sequence of occurrences, and to measure the rates at which certain quantities in the physical world or in conscious experience change. In addition to the three spatial dimensions, time is frequently considered a fourth dimension.

Although time has long been a crucial topic for research in philosophy, theology, and science, no definition of time that is universally applicable and free of circularity has ever been reached by academics. However, a number of different industries and areas, including business, industry, sports, the sciences, and the performing arts, all incorporate.

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A. The force of gravity causes the coin to change its velocity.

Force of gravity always act toward the center of the earth , so when an object is thrown up, the force of gravity will act in opposite direction of motion, that's toward the center of earth.

This will cause the object moving upwards to slow down due to the force of gravity acting on the opposite direction of the object's upward motion.

When a coin is tossed in the air, it travels upward, gradually slows down, momentarily reaches zero speed, then moves back downward with increasing speed due to effect of force of gravity.

Thus, the statement that best explains the change in the coin's motion is "The force of gravity causes the coin to change its velocity".

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If the height of the image formed is 4cm, the distance of the image from the mirror is - 24 cm

According to mirror formula,

[tex]\frac{1}{f} = \frac{1}{v} + \frac{1}{u}[/tex]

f = Focal length

v = Image distance

u = Object Image distance

m = Magnification

[tex]h_{o}[/tex] = Object height

[tex]h_{i}[/tex] = Image height

f = - 8 cm

u = - 12 cm

[tex]h_{o}[/tex] = 2 cm

[tex]h_{i}[/tex] = 4 cm

1 / ( - 8 ) = 1 / v - 1 / 12

1 / v = - 1 / 24

v = - 24 cm

The formula used to relate focal length with image and object length is mirror formula. This formula can be used for both plane mirror and spherical mirrors such as concave and convex mirrors.

Therefore, the distance of the image from the mirror is - 24 cm

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Answer:

You grab (grasp or seize suddenly and roughly.) the pizza with your toes

Explanation:

Answer:

First, you have to wash your toes to get all the germs off.

Next, make sure you have a good grip on the pizza.

Then, make sure you are in a comfortable position.

Next, wrap your leg around your neck so the pizza can reach.

Finally, you can enjoy your pizza.

Hope this helped!

Answer:

Positive: Proton, Negative: Electron, Neutral: Neutron

Explanation:

The variations get passed on from one generation of tree snails to the next from both parents to offspring and through the environment (Option C is correct).

The expression of genetic variation refers to differences in the nucleotide sequences between individuals of the same special which are passed across generations from parents to offspring and are selected by natural selection.

In conclusion, the variations get passed on from one generation of tree snails to the next from both parents to offspring and through the environment (Option C is correct).

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A change in temperature frequently causes substances to change phases. Most substances are solid at low temperatures; as the temperature rises, they become liquid; and at still greater temperatures, they become gaseous.

Melting is the conversion of a solid into a liquid (an older term that you may see sometimes is fusion). Solidification is the process where a liquid turns into a solid. The melting point, or the temperature at which a pure substance begins to melt, is a property of that substance. A solid must expend energy to become a liquid. A specific quantity of energy is required by every pure substance in order to transform from a solid to a liquid. This amount is known as the substance's enthalpy of fusion (or heat of fusion).

The complete question is- The diagram shows how states of matter can change when energy is either added or removed.

System before change

System after change

00000

00000

00000

00000

00000

00000

00000

All of these statements below are true EXCEPT

Energy was added to the matter causing the particle movement to increase.

The matter changed states which is a physical change.

The particles in the matter before the change had more energy than after the change.

The particles in the matter before the change had less energy than after the change.

the diagram is attached below.

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Answer: the forces must be unbalanced, with the force from the left greater than the force from the right.

Explanation:

After 3.0 s, If the first player makes up his mind to chase his opponent. If he accelerates uniformly at 3.5 m/s^2 then it would take 3.13 seconds to catch his opponent.

There are three equations of motion given by  Newton,

v = u + at

S = ut + 1/2×a×t²

v² - u² = 2×a×s

As given in the problem, a hockey player is standing on his skates on the Rideau Canal when an opposing player, moving with a uniform speed of 2.8 m/s, skates by with the puck. After 3.0 s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 3.5 m/s^2,

Let us assume the time taken to catch up would be t seconds.

The distance traveled by the hockey player = 2.8×3 + 2.8×t

By using the second equation of the motion,

s = ut+0.5at²   = 2.8×3 + 2.8×t

1.75t² - 2.8t -8.4 = 0

t = 3.13 seconds

The distance traveled by the hockey player to catch up = 2.8×(3+3.13)

                                                                                             =17.164 meters

Thus, it would take 3.13 seconds to catch his opponent.

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To obtain the approximate short-circuit current values when two hot conductors of a 3-phase system are shorted together, use _maximum percent of the 3-phase current value.

short circuit- It is an electrical circuit in which current finds a way to bypass the appliances on a path that has little or no resistance.

In the 3- phase system, there are three power wires which carries load.

most common. Types of three phase system are known as wye and delta.

To obtain the approximate short-circuit current values when two hot conductors of a 3-phase system are shorted together, use _maximum percent of the 3-phase current value.

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The gravitational force and the electromagnetic force are the two forces that have infinite ranges.

There are four fundamental forces in nature. They are:

The strength and range of the fundamental forces are mentioned in the table given in the adjoining image.

Out of the four forces, two forces are there whose range is infinite i.e gravitational force and electromagnetic force, and the other two forces i.e., weak nuclear force and strong nuclear force have extremely short ranges.

Thus, both gravitational force and electromagnetic force are two forces that have infinite ranges.

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The density of the neutron star is  ρ = [tex]7.733[/tex]×[tex]10^{14}[/tex] [tex]g/cm^{3}[/tex].

The volume of the neutron star is

V=([tex]4\pi /3[/tex])×[tex]R^{3}[/tex]

V= [tex]25.72^{17} cm^{3}[/tex]

Now the density of the neutron star is

ρ = M/V

ρ =  [tex]7.733[/tex]×[tex]10^{14}[/tex]g/[tex]cm^{3}[/tex]

The collapsing core of a large supergiant star with a total mass of between 10 and 25 solar masses—possibly even more if the star was very metal-rich—is what we refer to as a neutron star. Neutron stars are the tiniest and densest class of stellar objects currently known, with the exception of black holes and other hypothetical phenomena.

Although the galaxy may contain hundreds of millions of ancient neutron stars, only about 1,000 pulsars are known to exist. Although the enormous pressures found at neutron star cores may be similar to those at the moment of the big bang, conditions like this cannot be replicated on Earth.

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The ratio of (ε true/ε engr) = (1.2556/2.51) = 0.5002

So, the engineering strain is around 0.5002 bit wrong from the value of the true strain. This calculated value of difference is known as the extensional deformation.

For finding out the Engineering strain,

Engineering strain is a unit used to describe how much a material deforms when subjected to a specific force. It is equal to the amount of deformation divided by the material's initial length in the direction of the applied force.

⇒ε(engineering) = ΔL/L₀

⇒Lₓ= final length = 3.51 L₀

⇒L₀ = original length = L₀

⇒ΔL = Lₓ- L₀

        = 3.51 L₀ - L₀

        = 2.51 L₀

⇒ε(engineering) = ΔL/L₀

                            = (2.51L₀)/L₀  

                            = 2.51

For finding out the True Strain,

Deformation is measured by True Strain. It can be calculated by integrating the strain across short time intervals and adding them up. Hence,

⇒ε(true) = In (Lₓ/L₀)

⇒Lₓ = 3.51L₀

⇒L₀ = L₀

⇒ε(true) = In (Lₓ/L₀)

              = In (3.51L₀/L₀)

              = In 3.51

              = 1.2556

So, dividing both the values, we get

(ε true/ε engr) = (1.2556/2.51) = 0.5002

The complete question is as follows:

The elastic cords used for bungee jumping are designed to endure large strains. Consider a bungee cord that stretches to a maximum length 3.51 times the original length. There are different ways to report this extensional deformation. Calculate how wrong' the engineering strain is compared to the true strain by evaluating the ratio: ε true/ε engr

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School population.

The biggest school in the world is in lucknow, india. it has more than 40,000 students and 2500 teachers! would it be easier to make new friends in a school with 40,000 kids than a school with fewer than 100 kids? School population.

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a. The car travel 64m in 8s.

b .It takes 20s to cover a distance of 160m

we know that speed is equal to distance travelled by an object by time taken.

s=d/t

a. it is given that the speed of the car is 8m/s and the time it takes is 8s so here the distance will be

d=s*t

= 8x8

=64m

b. here it is given that the car travels a distance of 160 m and it has a speed of 8m/s so the time taken by the car to travel 160 m will be

t=d/s

=160/8

=20s

So from the above equations it is clear that s=d/t and the distance covered is 64m in a. and 20s in b.  

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Charge of an electron, e = 1.60217662 × 10-19 coulombs whereas to calculate the charge of an electron it is not fixed as it may vary.

The charge of the electron is comparable to the size of the rudimentary charge (e) but bears a negative sign. Since the esteem of the rudimentary charge is generally 1.602 x 10-19 coulombs (C), at that point the charge of the electron is -1.602 x 10-19 C.

When communicated in nuclear units, the basic charge takes the esteem of solidarity, i.e., e = 1. In this way, the electron’s charge can be signified by -e. Even though the proton is much more gigantic than the electron, it was as it was including a charge of e.

Thus, impartial particles continuously bear the same number of protons and electrons.

JJ Thomson is the undisputed pioneer of the electron. Be that as it may, despite all those tests he performed on it, he might as it was overseen getting the electron’s charge to mass proportion.

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If we want to burn a paper by focusing sunlight then we have to use a converging lens that can converge all sunlight at a point called the focus.

Thus Convex lens is used to burn the paper.

The transmissive optical device known as a lens employs refraction to focus or disperse a light beam. While a compound lens is made up of numerous simple lenses (elements), they are typically oriented along a common axis, as opposed to a simple lens, which is made up of a single transparent piece. Materials like glass or plastic are used to create lenses, which are then polished, ground, or molded into the desired shape. Unlike a prism, which refracts light without concentrating, a lens can focus light to create an image. Lenses are also used to describe instruments that focus or scatter waves of radiation other than visible light, such as explosives, microwaves, and electron lenses.

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The voltage across the resistor is 0.2V.

Heat energy is given as H = [tex]I^{2}[/tex]Rt.

Voltage across the resistor is

V= 0.2v

12 = [tex]0.02^{2}[/tex]×R×60

R= 500 ohms.

voltage across the resistor is

V=IR

V=   0.02^{2} ×500

V= 0.2V

A resistor is an electrical component with two terminals that implements electrical resistance as a circuit element. Resistors are employed in electronic circuits for a variety of purposes, including lowering current flow, adjusting signal levels, dividing voltages, biasing active devices, and terminating transmission lines.

An electrical component known as a resistor controls or restricts the passage of electrical current in an electronic circuit. Additionally, resistors can be used to supply a specified voltage to an active device like a transistor.

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The average speed of bunny's entire trip is 0.52 m/s and her average velocity is 0 m/s.

The average speed of an object is the ratio of total distance travelled to the total time of motion of the object.

V(speed) = total distance / total time of motion

V(speed) = (6 m + 6 m) / (11 s + 12 s)

V(speed) = (12 m) / (23 s)

V(speed) = 0.52 m/s

The average velocity of an object is the ratio of total displacement to total time of motion of the object.

V(velocity) = total displacement / total time of motion

V(velocity) = (6 m - 6m) / (11 s + 12 s)

V(velocity) = (0 m) / (23 s)

V(velocity) = 0 m/s

Thus, the average speed of bunny's entire trip is 0.52 m/s and her average velocity is 0 m/s.

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Answer:Transverse waves cause the medium to move perpendicular to the direction of the wave.

Explanation:

In a transverse wave, particles of the medium vibrate up and down perpendicular to the direction of the wave. In a longitudinal wave, particles of the medium vibrate back and forth parallel to the direction of the wave.

Answer:

To convert is to change measuring units so that what is being measured may be more easily measured etc.

Answer:

A conversion factor is a number used to change one set of units to another by multiplying or dividing.

Explanation:

The appropriate conversion factor to an equal value must be used when a conversion is necessary.

For example, to convert inches to feet, the appropriate conversion value is 12 inches, equal to 1 foot.

The total length of the brass used to make the girls neck rings= 840cm

The radius of the brass = 20 cm

The volume of the cylinder = 15,086cm³

The mass of brass = 131700.78g

The number of turns that makes up the neck rings = 21

The circumference of each turn = 40cm

Therefore the total length = 40 × 21 = 840cm

The height of the brass= 12cm

The circumference of the turns= 40cm

Therefore the radius = 40/2 = 20cm

The formula for the volume of cylinder,

V = πr²h

r = 20cm

h = 12cm

V= 22/7 × 20² × 12

V = 22× 400×12/7

V= 105600/7

V= 15,086cm³

Density =8.73 g/cm³

Volume = 15,086cm³

mass= density × volume

mass= 8.73 × 15,086

Mass = 131,700.78g

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Answer:

1.) B

2.) Polar Regions or high altitudes.

Explanation:

11 m

Explanation:

d = 1/2 a t^2

  = 1/2 (9.81)(1.5)^2 =11 m

The power supplied by the gravitational force will increase because (Power=work/time).

A falling object gains momentum as it descends.

An increase in air resistance is caused by a speed increase.

At some point, the force of air resistance grows strong enough to counteract the pull of gravity.

Since there is no net force at this point, the object will stop accelerating.

Although the direction and magnitude of velocity fluctuate, the acceleration caused by gravity remains constant and downward.

The ball has zero velocity at the highest point in its trajectory, and it picks up speed as it descends back toward the earth.

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