Need to fill in the blank

Answer:

I think the answer is 54 cm

The values of time (t) = 7.20, 0.62, and the model rocket is launched with an initial upward velocity of 125 ft/s and height of h.

The directional speed of an object in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.

height of the rocket is given as,

h = 125t - 16t²

now, when h = 71 then,

71 = 125 t - 16 t²

16 t² - 125t + 71 = 0

Using the quadratic formula, we have:

          - (-125) + √ (-125)² - 4 × 16 × 71

t =             ____________________

                              2 × 16

           125 + √11081                               125 - √11081

t =         _________                   t =         _________

                  32                                                 32

t = 7.20,   t = 0.62

Hence, the values of time (t) = 7.20, 0.62.

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Answer:

Explanation:

Given:

h = 882 km

R = 6371 km

___________

V - ?

Since the height of the orbit is much less than the radius of the Earth, then the acceleration of free fall g = 9.81 m/s²

Speed:

V = √ (g·(R+h)) = √ ( 9.81·(6371+882)·10³ ) ≈ 8 440 m/s  or

V = 8.44 km/s

Answer:

Answer: I would apply a force to the right in order to push him in the direction of lunch.

Explanation:

The rock is actually 22.61 cm beneath the surface. For When viewed from above the surface of the stream at an angle with force, a boulder appears to be 17 cm below the surface of a smooth stream.

The length of a straight line, which is the shortest route between any two points in space, is the distance between them. In classical physics, particularly Newtonian mechanics, this is how distance is typically understood. In two- and three-dimensional space, the straight-line distance is mathematically codified as the Euclidean distance. A force in physics is an effect that has the power to alter an object's motion.

I = O na/nw

17 = O * 1/1.33

O = 17 * 1.33 = 22.61 cm

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In this case, the magnitude of the momentum of vehicle 2 is greater than the vehicle 1.

What is momentum?

In Newtonian mechanics, an object's mass and velocity are combined to form momentum, more precisely linear momentum or translational momentum. It has both a magnitude and a direction, making it a vector quantity.

The kilogramme metre per second (kg m/s), or newton-second in the International System of Units (SI), is the unit used to measure momentum.

The rate of change of a body's momentum is equal to the net force exerted on it, according to Newton's second law of motion. Although momentum varies depending on the frame of reference, it is a conserved quantity in any inertial frame, which means that if a closed system is not impacted by outside forces.

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The mechanical energy of the swing is the sum of the potential energy and the kinetic energy which is equal to 225 Joules.

Mechanical energy is the energy which is present either in an object which is in motion or the energy which is stored in objects by their position. Mechanical energy is the main driver of renewable energy. Many different forms of renewable energy rely directly on the mechanical energy to adequately produce enough amount of power or convert energy.

The mechanical energy of the object is the sum total of individual energies which are present in the object. The mechanical energy of an object can be represented as:

M.E. = P.E. + K.E.

M.E. = Mechanical energy,

P.E. = Potential energy,

K.E. = Kinetic energy

Therefore, the mechanical energy of the swing will be:

M.E. = 150J + 75J

M.E. = 225 Joules

Therefore, the mechanical energy of the swing is equal to 225 Joules.

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Young's modulus for the rope 5.462 × [tex]10^{9}[/tex]N/m²

Mass is  70 kg

F = mg = 70 × 9.8N

F = 686N

ΔL = 8cm

A = πr² = 0.785 ×[tex]10^{-4}[/tex]

Y = F/A l/Δl = 686 × 50 /  0.785 ×[tex]10^{-4}[/tex] × 8 × [tex]10^{-2}[/tex]

Y = 5.462 × [tex]10^{9}[/tex]N/m²

Young's modulus (displaystyle E), also known as the Young modulus or the modulus of elasticity in tension or compression (i.e., negative tension), is a mechanical characteristic that gauges the stiffness of a solid material under tensile or compressive tension when a force is applied longitudinally. Using the formula, it quantifies the relationship between axial strain and tensile/compressive stress in the linear elastic zone of a material. Axial strain is measured as the proportionate deformation of the relationship between axial strain and tensile/compressive stress. Young's modulus was first introduced by Leonhard Euler in 1727, while being named after the 19th-century British scientist Thomas Young. Giordano Riccati, an Italian physicist, conducted the first experiments in 1782 that utilized the idea of Young's modulus in its current form, 25 years before Young's work.

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The chemical symbol used is 2K + 2I to complete the equation for the decomposition reaction.

Decomposition reaction is defined as a chemical reaction when the reactant or molecule breaks down into less complex compounds Consequently, when a single reactant splits into two or more products.  Because two or more reactants are combined to create a single product in a combination reaction, they are known as the opposite of a combination reaction.

One reactant produces two or more products during a decomposition process. Iodine and potassium will be produced as potassium iodide breaks down. With two K and two I on each side, this equation is balanced. It can be described using the all-inclusive formula: AB --> A + B.

Thus, the chemical symbol used is 2K + 2I to complete the equation for the decomposition reaction.

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Answer:

I think D is the answer to the question

Value of M (mass of other block) in the mention pulley system is 3.68 kg.

Tension is the contact force transmitted when the force on both ends pulls on a rope, cord, wire, etc.

For example, a tire swing hanging from a tree creates tension in the rope that holds the swing to the branch. Pulling at the bottom of the rope is due to gravity, while pulling up is due to the branches resisting rope pull. The pulling force acts along the length of the rope and acts evenly on the objects (tires and branches) at both ends. At the hoop, the pull is upward (because the tension in the rope holds the hoop up), but at the branch the pull is downward (a taut rope pulls the branch down).

Let's calculate acceleration:

S = ut + ¹/₂ at²

Where, s = 50 cm or 0.5 m

u = 0 m/s

t = 1.0 second

Now, substitute the values:

0.5 = 0 × 1 + ¹/₂ a × 1²

0.5 = ¹/₂ a

a = 1 m/s²

Now for tension force following are the equations:

T = ma + mg

T = Mg - Ma

ma + mg = Mg - Ma

Where, T = Tension force

m = 3 kg

a = 1 m/s²

g = 9.8 m/s²

M = To be calculated

a = (Mg - mg)/(M + m)

1 = (M × 9.8 - 3 × 9.8)/(M + 3)

1(M + 3) = 9.8 M - 29.4

M + 3 = 9.8 M - 29.4

29.4 + 3 = 9.8 M - M

32.4 = 8.8 M

M = 32.4/8.8

M = 3.68 kg

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The complete question is as follows:

The system shown below is released from rest and moves 50 cm in 1.0 second. What is the value of M? All surfaces are frictionless.

Answer:

A stronger force can cause a greater change in velocity.

Explanation:

Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity.

The two quantities agree within experimental uncertainty but not agree numerically.

There is no frictional force exerted on the puck, and the gravitational force and normal force are exerted on the puck and are equal in magnitude.

The mean value of F is: 10.52 N

The mean value of TA is: 10.6 N

So, the two quantities agree within experimental uncertainty but not agree numerically.

The puck on the table relates to a planet orbiting the sun because the force of tension is acted on the puck with its connection to the table using the string. Similarly, a planet has the force of gravity acting upon it is allowing it to orbit in its path.

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Answer:

1) B. The use of heat to kill any microorganisms living in a substance

2) B. Burning coal to produce electricity

3) A. Because he misinterpreted the Burgess Shale fossil data

True , The magnetizing inductance and this inductance are parallel. Each coil in a transformer has the same voltages each turn.

Power transformers, distribution transformers, and isolation transformers, in that order. We have Twin Winding Generators and Autotransformers based on windings. We include Core Type Transformers, Shell Type Transformers, and Berry Type Transformers based on core designs.

Electric circuits employ transformers to modify the voltage of the electricity flowing through the circuit. In AC circuits, it is utilized to step up or step down the voltage (thus, "stepping up" or "stepping down").

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The wave speed of a wave is equal to its frequency multiplied by its wavelength.

Wavelength is a measure of the distance between two successive peaks of a wave. It is most commonly associated with light, sound, and other forms of electromagnetic radiation. It is the distance from one peak of the wave to the next, measured in meters. Wavelength is an important factor in determining the properties of a wave, such as its frequency, amplitude, and speed. It is also used to measure the wavelength of sound, radio waves, and other forms of electromagnetic radiation.

Therefore, the wave speed of a 44 Hz wave with a wavelength of 1 m is 44 m/s. This is because frequency is the number of waves passing a certain point in a certain amount of time (measured in hertz or Hz), while wavelength is the distance between two successive wave crests (measured in meters). Thus, when multiplied, these two values give us the wave speed, which is measured in meters per second (m/s).

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Answer:

Explanation:

The correct answer is A. 32.5

Mechanical advantage is the ratio of force that is input into a machine to the force output.

Mechanical advantage of a wheel and axle is calculated by dividing the radius of the wheel by that of the axle.

MA=R/r where R is the radius of the wheel and  r is the radius of the axle.

Substituting for the values in the question gives:

MA=26cm/0.8cm

   =32.5

Answer:     [tex]8.93 V[/tex]

                         ,        V=IR  

                        V=1.9*4.7

                          =8.93 V    

The magnitude  of the net force on the rocket was found to be 42N

Define magnitude ?

What is magnitude in Physics, is surely an issue of tremendous relevance in science. Magnitude often relates to the quantity or distance. In regard to the movement, we may associate magnitude with the size and speed of the item while moving.

The magnitude of a thing or a quantity is its size. Like in terms of speed, a car is driving quicker than a motorbike. In this situation, the car's speed is greater than the motorbike's. Let's now discuss what magnitude in physics means.

the magnitude of the net force was determined by the equation.

∑F= ma

=6(7m/s²)

=42 N

the force was exerted upwards.

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The government started allowing reservations for Native Americans to use federal monies in 1954, but stopped by 1962.

The earliest phase of Indian encounters with Europeans is when the word "exclusive" originally appeared. A sizable portion of the Indians' country was "reserved" for their exclusive use through treaties. Indians were intended to live on reserves, which are frequently sparsely populated areas of land.

Displacement to reservations had two purposes for the United States. Native Americans were originally removed from the area to create room for westward territories. Second, it made it possible for the US to carry out a strategy to transform tribal villages into modest farming settlements.

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The rotational kinetic energy (in J) of Jupiter in its orbit around the Sun is 1.613 × 10³⁵ J

Rotational kinetic energy is kinetic energy due to rotation about an axis.

The rotational kinetic energy is given by K = 1/2Iω² where

So, We have that the rotational kinetic energy of Jupiter is

K = 1/2Iω²

K = 1/2(MR²)(2π/T)²

K = 1/2(MR²)(4π²/T²)

K = 2π²MR²/T²

Substituting the values of the variables into the equation, we have that

K = 2π²MR²/T²

K = 2π² × 1.898 × 10²⁷ kg × (7.78 × 10¹¹ m)²/(3.74976 × 10⁸ s)²

K = 2π² × 1.898 × 10²⁷ kg × 60.5284 × 10²² m²/14.0607 × 10¹⁶ s²

K = 2π² × 114.8829 × 10⁴⁹ kgm²/14.0607 × 10¹⁶ s²

K = 229.7658π² × 10⁴⁹ kgm²/14.0607 × 10¹⁶ s²

K = 16.3410π² × 10³³ kgm²/s²

K = 161.2791 × 10³³ kgm²/s²

K = 1.612791 × 10³⁵ kgm²/s²

K ≅ 1.613 × 10³⁵ J

So, the  rotational kinetic energy is 1.613 × 10³⁵ J

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The angle from the vertical does the fish see the top of the fishermans head is 42.24 degrees and can be finded out by snells law.

According to Snell’s Law when light is incident on an interface separating two media, the angles of incidence and refraction, θ1 and θ2, are related,

n1 sin(θ1) = n2 sin(θ2)

where θ1 or θ2 is the angle between the normal to the interface and the direction in which incident or refracted wave is propagating. The quantities n1 and n2 are the indices of refraction of the two media.

While the speed of light is constant in a vacuum, the speed of light in air and in transparent solids is somewhat less. The ratio of the speed of light in a vacuum (c) to the speed of light in a solid (v) is called the index of refraction (n) of the solid.

Applying snells law,

nwater *sinα = nair *sinβ

nwater *sinα = sinβ

sinα = sinβ/nwater

sinβ = 1.33 sinα

AB = 3.5m-BC

AB = 3.5m-CDtanβ

AB = 3.5m-1.55*tanβ

Also, AB = 4.5m*tandα

4.5m*tandα = 3.5m-1.55*tanβ

4.5m*tandα = 3.5m-1.55*(sinβ/cosβ)

4.5m*tandα = 3.5m-1.55*1.33sinα/[tex]\sqrt{1-(1.33)^2*(sin\alpha )^2}[/tex]

α=42.24 degrees.

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By the time Ernie gets to Burt, the log has drifted 0.29 metres away from the coast.

Centre of mass definition ?

The location where the centre of the distribution of mass in space is located is the centre of mass for a given item or system of objects. For bodies to continue to be at rest, the centre of mass must equal zero.

It may be expressed as,

∑miΔxi=0

m=mass

x=distance

The 3.2m-long log weighs 290kg and is 3.2m long. Ernie weighs 32 kg, whereas Burt weighs 33 kg.

Ernie accepts Burt's offer of a cookie and moves to his side of the log to take it.

By the time Ernie gets to Burt, the log should have travelled x metres. Consequently, using the formula above,

33(x)+290(x)+32(x-32)=0

x=0.29m

As a result, the log has travelled 0.29 metres by the time Ernie gets to Burt.

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The moment of the inertia of the system about the z axis and the rotational kinetic energy of the system is 143 Kg/m².

A body's resistance to having the speed of its rotation along an axis changed by the application of a torque is quantified by the term "moment of inertia" in physics (turning force). The axis might be internal or exterior, and it can be fixed or not.

Let, the distance of mass 2 kg from O to r₁

Therefore, r₁ = [tex]\sqrt{2^2 +3^2}[/tex]

r₁ = [tex]\sqrt{13}[/tex] m

the distance of masses to the rotational axis are same.

So, r₁ = r₂ = r₃ = r₄ = r = [tex]\sqrt{13}[/tex]

Hence, I = ∑ [tex]m_i r^2[/tex]

I = r² (m₁ + m₂ + m₃+ m₄)

I = 13 × (11)

I = 143 Kg/m²

So, the moment of the inertia of the system about the z axis and the rotational kinetic energy of the system is 143 Kg/m².

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The graph shows that there was more variation in 2010.

A graph can be described as a pictorial representation or a diagram that represents data or values in an organized manner. The points on the graph often represent the relationship between two or more things.

A graph is a common data structure that consists of a finite set of nodes (or vertices) and a set of edges connecting them.

From the graph show, scientists measured the beak length of a population of birds in a lake in 1960. they measured the beak length of the bird population again in 2010. The graph shows that there was more variation in 2010.

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The total volume occupied by two internal clamps, six 12 AWG conductors and one grounding conductor, and a single-pole switch is 20.25 cu in.

When counting the number of conductors in a box a conductor running through the box is counted as conductor S?

An unbroken conductor, passing through the box without splice or termination, can be counted as one conductor if it is less than two times the minimum length required for the free conductor in 300.14. For example, two conduits are entering opposite sides of a four-inch square metal box that has a depth of 1 1/2 inches.

How many amps can 12 AWG handle?
The twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps, and The circuit breaker or fuse is always sized to protect the conductor [wire].

12 AWG =2.25 cu. in. ( 6 x 2.25 = 13.5)

Device( 2 x 12 AWG cu. in.)= ( 2 x 2.25 = 4.5)

Clamp ( 1 x 12 AWG cu. in.)= ( 1 x 2.25 = 2.25)

13.5 + 4.5 + 2.25 = 20.25 cu. in.

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Natural gas, hydrogen, electricity, hybrid vehicles, biofuels, five major alternative energy sources in transportation. Producing energy from fossil fuels no releases of greenhouse gases, lowering forms of pollution.

The relative ease with which petroleum-derived fuels may be stored and utilized in internal-combustion engines accounts for their supremacy. However, they need a more intricate storage system than other fossil fuels, such as natural gas, gas, and methanol, which can also be utilized as transportation fuels.

Use your personal automobiles sparingly. When possible, strive to use public transportation. Reduce the car's additional BOOT weight. Unnecessary objects like a flat tire and unwanted luggage—especially hefty ones—in the car might lower its mileage.

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The energy of 25 kg object is moving at a velocity or 10 ml is 1250J.

KE = 1/2mv²

The mass is m = 25kg

The velocity is v = 10ms⁻¹

KE = 1/2 × 25 × 10²

⇒ KE = 1250J

Hence, Kinetic energy is 1250J

The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.

The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.

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The Earth’s age was established to be about 4.6 billion years ago using radiometric dating which is an example of an absolute age because the age in years has been calculated is true.

Scientists have been studying ancient Earth to establish an accurate timeline of its formation and the evolution of all life. They have used several types of methods to determine the ages of materials. There are two main categories by which this is done relative age dating and absolute age dating. Relative age dating refers to the study of a material and its comparison to other similar materials to establish a timeline. Absolute age dating method refers to a method of measuring how old a natural material is in years. In other words, the absolute age of an Earth material is to determine how old it actually is in years. It is sometimes called a calendar age. Using radiometric dating, scientists have established the age of Earth to be 4.6 billion years which is an example of an absolute age.

Note: The question is incomplete as it is missing options which are A) True B) False.

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Angle and frequency between neighboring zones for constructive interference are both 1.846 * 103⁻³ degrees and 6.44 * 10¹⁰ Hz, respectively.

The quantity of oscillations that pass a given point in one unit of time, as well as the number of passes or oscillations that an object in periodic motion experiences in one unit of time Multiple electrical frequencies cannot coexist without causing device damage, hence keeping a constant electrical rate is crucial. When it comes to supplying power on a national basis, this has important ramifications.

a). For Constructive interference;

[tex]$$\begin{aligned}& d \sin \theta=m \lambda \\& \theta=\sin ^{-1}\left(\frac{m \lambda}{d}\right)=\sin ^{-1}\left(\frac{1 \times 580 \times 10^{-9}}{0.018}\right) \\& \theta=1.846 \times 10^{-3} \text { degreees }\end{aligned}$$[/tex]

Angle between nearby constructive interference zones;

[tex]$$\Delta \theta=1.846 \times 10^{-3}-0=1.846 \times 10^{-3} \text { degrees }$$[/tex]

b). [tex]$0.018 \sin 15=1 \times \lambda$[/tex]

[tex]$\lambda=4.66 \mathrm{~mm}$[/tex]

Frequency;

[tex]$$\begin{aligned}& \mathrm{f}=\mathrm{c} / \mathrm{lambda}=\left(3^* 10^8\right) /\left(4.66^* 10^{-3}\right) \\& \mathrm{f}=6.44^* 10^{10} \mathrm{~Hz}\end{aligned}$$[/tex]

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The complete question is-

Raise your hand and hold it flat. Think of the space between your index finger and your middle finger as one slit, and think of the space between middle finger and ring finger as a second slit.

(a) Consider the interference resulting from sending coherent visible light perpendicularly through this pair of openings. Calculate the angle between adjacent zones of constructive interference, assuming the width of your middle finger to be 2.7 cm and the wavelength of the light to be 700 nm.

(b) To make the angles in the interference pattern easy to measure with a plastic protractor (e.g., for which the angle between the central maximum and the adjacent ones is 15), you should use an electromagnetic wave with what frequency?

Hz

How is this wave classified on the electromagnetic spectrum?