what should have happened to the grand unified force as the universe expanded and cooled at an age about

The  time taken to travel 1.5 m across the inclined plane if it starts from rest at the top be 0.95second.

An inclined plane, sometimes referred to as a ramp, is a flat supporting surface that is tilted at an angle and used to help raise or lower a weight with one end higher than the other.

One of the six traditional simple devices that Renaissance scientists defined is the inclined plane. Heavy weights are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo onto a truck, a pedestrian ascending a ramp, an automobile ascending a grade, and a train ascending a gradient.

Given that:

angle of inclination = 20°.

Length of the inclined plane = 1.5 m.

Acceleration along the inclined plane = g sin20° =

Hence, time taken to travel 1.5 m across the inclined plane if it starts from rest at the top = √(2l/gsinθ = √(2×1.5/9.8sin20°) second = 0.95second.

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The magnitude of gopher's velocity as it reaches the ground is 22.18 m/s.

Given that, velocity of the eagle u = 10 m/s

Height x = 20 m

From one of the equations of motion, we know, v² - u² = 2 * a * s

Here, s is the height (x)

u is the initial velocity

a is the acceleration due to gravity

v is the velocity of the gopher as it reaches the ground

v² = u² + 2 a * x

v = √(u² + 2 a * x)

v = √( 10² + 2 * 9.8 * 20) = 22.18 m/s

Thus, the velocity of the gopher as it reaches the ground is 22.18 m/s.

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Race car is going at a speed of 94.05 km/hr. , when frequency and revolutions are given.

The number of occurrences of a repeating event per unit of time is called as frequency . It is also referred to as temporal frequency and is distinct from angular frequency. Frequency is measured in hertz.

Given frequency is 548 Hz and 2622 rev/km

Frequency of sound produced by each piston= 548/8

= 68.5 Hz

Each cylinder makes sound every 2 revolutions,  therefore for a piston to have 68.5 Hz frequency, it undergoes 137 rev/sec

V= (68.5 rev/sec)/(2622rev/km) * (1000m/1km)

= 26.125 m/s

V = 94.05 km/hr.

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The block requires the smallest applied force to keep it moving at constant velocity is copper = 0.36. Hence option c is correct.

Velocity is defined as the speed of change in the object's position relative to time and a frame of reference. A specification of a thing's speed and direction of motion is what velocity is.

The force of friction and the applied (horizontal) force must be different for an object to accelerate or decelerate, and they must be equal for it to move at a constant speed.

Thus, the block requires the smallest applied force to keep it moving at constant velocity is copper = 0.36. Hence option c is correct.  

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Your question is incomplete, but probably your complete question was

A 10 kilogram block of each of these materials is pulled horizontally across a steel floor at a constant velocity. Which block requires the smallest applied force to keep it moving at a constant velocity?

Al = 0.47

brass= 0.44

copper = 0.36

steel = 0.57

Answer:

20.41m

Explanation:

v1=20 m/s

30°

-assuming flat ground and no friction forces acting-

[tex]vf^{2}[/tex][tex]=vi^{2} +2a[/tex]Δx ⇒ Δx[tex]= vf^{2} -vi^{2} /2a[/tex]

[tex]0^{2} -20^{2} /2(-9.8)[/tex]

[tex]400/19.6[/tex]

[tex]=20.408[/tex]⇒[tex]20.41 m[/tex]

The pressure in the burette if the atmospheric pressure in the room at that time was 765.0 torr is 915 torr

The following formula can be used to determine the pressure inside the burette:

Gas pressure = atmospheric pressure + height-related pressure

We can calculate the pressure in the burette using the formula above. Below is an example to help:

Pressure due to height = 15 cmHg = 150 mmHg = 150 torr

Atmospheric pressure = 765.0 torr

Pressure in burette =?

Pressure in burette = Atmospheric presure + pressure due to height

Burette pressure = 765.0 +150

Burette pressure= 915 torr.

Consequently, burette's pressure is 915 torr.

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The intensity reflects 95% of the critical reading scores is 430 t 230.

What is intensity?

intensity is the period of time between two points.

As per the given scenario

95% confidence intervals

(Mu - 6.7-Mu+6.7)

(430-115×2 , 430+115×2)

By adding or substracting

( 430-230, 430+230)

So interval (430±230)

Thus,

The interval= 430±230.

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In the simulation, an oxygen atom by itself doesn't exist. There are always two atoms of oxygen.

A single water molecule is quite tiny. Since humans are unable to see or feel a single molecule, we are unable to measure or otherwise handle it in the laboratory.

Molecules are created when atoms come together. Two hydrogen (H) atoms and one oxygen (O) atom make up the three atoms that make up a water molecule. Because of this, water is occasionally abbreviated as H2O. There are billions of water molecules in a single drop of liquid.

Despite being the most prevalent substance on earth, water is rarely encountered in its purest form in nature. Usually, pure water needs to be produced. Distilled water or deionized water are two names for pure water. In distilled water, evaporation has evaporated away every dissolved ingredient that was previously present in the water.

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The graphs  are helpful for displaying data because  they help you identify patterns in the data. Option (D) is correct.

A graph is a structure that resembles a set of items in discrete mathematics, more specifically in graph theory, in which some pairs of the objects are conceptually "connected." The items are represented by mathematical abstractions known as vertices (sometimes known as nodes or points), and each pair of connected vertices is known as an edge (also called link or line).

A graph is typically shown diagrammatically as a collection of dots or circles representing the vertices and lines or curves representing the edges. One of the topics studied in discrete mathematics is graphs.

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The force on the roof that has a surface area of 20000cm² with 100000Pa of pressure exerted is 5N.

Pressure is the amount of force that is applied over a given area divided by the size of this area.

The pressure of a substance can be calculated by using the following formula:

Pressure = Force × area

According to this question, a roof has a surface area of 20000cm². If the atmospheric pressure exerted on the roof is 100000Pa, the amount of force on the roof can be calculated as follows:

100000Pa = Force × 20,000cm²

20000F = 100000

F = 100,000 ÷ 20,000

F = 5N

Therefore, 5N is the force acting on the roof.

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Answer:

2kg

Explanation:

F= ma

F = 0.5N and a = 0.25m/s²

m = F/a

= 0.5/ 0.25

= 2kg

19.15 feet is the distance the car travel in that time when a car traveling at 80 feet/sec decelerates at a constant rate so that it comes to a complete stop after 30 seconds.

To find the constant deceleration rate we use a = Δv/Δt.

a=80feet/sec/30s

a=-2.66 m/s^2

now to find the distance travelled

s =  80*-2.66 *30^2 =19.15 feet    (where s= distance)

Hence,19.15 feet is the distance the car travel in that time when a car traveling at 80 feet/sec decelerates at a constant rate so that it comes to a complete stop after 30 seconds.

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Answer:

3924 Joules

Explanation:

Potential Energy is calculated with the formula:

PE = mgh

From the problem m=200kg and h=2m so the gain in PE when the weights are lifted is 200*(9.81)*2 = 3924 J

Angular displacement: 10 rad.

linear displacement: 60 cm

In basic terms, angular velocity is the pace at which an item rotates or circles around an axis in time. "ω" is a Greek letter that stands in for angular velocity. Radians per second is the SI unit for angular velocity since it is expressed as an angle per unit of time.

Given that,

Radius of the CD below is 6.0 cm

Angular velocity is 5.0 rad/s.

As we know, angular displacement, (θ) = ω × t

or, θ = 5.0 rad/s × 2.0 sec

or, θ = 10 rad.

Next, linear displacement, (S) = R × θ

or, S = 6 cm. × 10 rad

or, S = 60 cm

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The kinetic energy of the book be as it hits the floor is - 29.4  kg(m²/s²)   and the velocity of the book as it hits the floor is   -5.422 m/s .

From the question we can get,

mass (m) = 2 kg

height (h) = 1.5 m

we know ,

P.E = mgh

∴ g =9.8 m/s

∴ P.E = 2 × 9.8 × 1.5

∴ P.E = 29.4 kg(m²/s²)

According to the law of conservation of energy, energy cannot be destroyed but can only be converted from one form to another. Because KE and PE are interconvertible, they do not violate the law of conservation of energy.

∴Total Energy = PE + KE

Because the total energy of the system will remain constant, total energy=0

∴ PE+KE=0

It means that

∴PE=-KE

Hence, the kinetic energy is - 29.4   kg(m²/s²)

We know,

K.E = 1/2 (mv² )

∴ -29.4  = 1/2 ( 2 × v²)

∴ -29.4 = v²

∴ v = √-29.4

∴ v =  -5.422 m/s

Hence velocity of book is  -5.422 m/s.

An object's kinetic energy is the energy it has as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a certain velocity. The body retains its kinetic energy after gaining it during acceleration until its speed changes.

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Only gravity acceleration is needed.

If we let gravity be g

I will rename M1 as M₁ for the first mass

I will rename M2 as M₂ to further reduce the possible confusion of a subscript with a multiplicand.

The tension in the string will support the weight of M₂ and will supply the centripetal force required to keep M₁ on a circular path:

M₁v²/R = M₂g

v = √(M₂gR/M₁)

A object of mass M1 travels in a circular path of radius R on a horizontal table. The object is attached to a string that passes through a hole in the center of the table.  An object of mass M2 is attached to the other end of the strings and hangs vertically under the table, which produces a force on M1. All frictional forces are considered to be negligible.

Therefore, Only gravity acceleration is needed.

If we let gravity be g

I will rename M1 as M₁ for the first mass

I will rename M2 as M₂ to further reduce the possible confusion of a subscript with a multiplicand.

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Answer:

The momentum of the soccer ball will be twice that of the baseball.

Explanation:

If an object of mass [tex]m[/tex] travels with a velocity of [tex]v[/tex], the momentum [tex]p[/tex] of that object will be [tex]p = m\, v[/tex]. Thus, if velocity is fixed, momentum will be portional to the mass of the object.

The mass of the soccer ball is twice that of the baseball: [tex](300 / 150) = 2[/tex]. Thus, when moving at the same velocity, momentum of the soccer ball will be twice that of the baseball.

Answer:

At time t=0 , Projectile is launched from the top of cliff an angle of 30

Explanation:

45-443tx=332

Answer:

Heat energy

Explanation:

Explanation:

heat energy or thermal energy

The set or star-position measurements taken six months apart is most likely to reveal the highest parallax change for close stars.

The basic units of length & distance measurements inside the English system are the inch, yard, yard, and mile. Other length measurements include a rod, furlong, and chain.

The three most common fundamental units in the metric system are the meter, gram, and liter. A liter is a unit in volume equal in 3.28 meters, the meter is a length measurement equal to 3.28 feet, and the gram is just an unit of matter equal to approximately 0.0022 pounds (or about the mass of the a paper clip).

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The change in the insects' coloration over time can be explained by evolution of insect body coloration under changing climates.

In studies on colour variety, its evolutionary causes, and the mechanical underpinnings of such variation, insects have served as important models. Recent research suggests that insect colour is adapting to the rapid climatic change. However, because a variety of biotic and abiotic factors can interact and mediate colour change, it is still difficult to determine the causes of colour variation within populations and species, as well as across space and time. Here, we discuss some of the difficulties and most recent developments in this area.

We begin by outlining the main competing theories for how climatic conditions affect insect colour variation.

Second, we examine the evidence that insect colour is now evolving adaptively in response to climate change.

Following this, we address elements that may help or hinder colour evolution in reaction to climate change. Finally, we suggest avenues for future work and identify gaps in this area of study.

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Answer:

1 m/s

Explanation:

According to the law of conservation of momentum:

[tex]m_{1} u_{1} +m_{2} u_{2} =(m_{1} +m_{2} )v[/tex]

We take right to be the positive direction (meaning we put minus in front of the velocity of the block which is travelling to the left):

1 kg * 5 m/s - 2 kg * 1 m/s = (1 kg + 2 kg) * v

5 kgm/s - 2 kgm/s = 3kg * v

3 kgm/s = 3 kg * v

v = 1 m/s

The position of center of mass will be x = (x₁m₁ + x₂m₂) / m₁ + m₂

The center of gravity of a body or system of particles is defined as the point at which the entire mass of the body or all the masses of the system of particles appeared to be concentrated.

In physics, we can say that the center of mass is the point at the center of the distribution of mass in space (also known as the equilibrium point) where the weighted relative position of the distributed mass sums to zero.

where, x₁ and x₂ are the positions of the objects and m₁ + m₂ are the masses of the objects respectively.

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The mass trend that among four moons is highest close to Jupiter and decreases with distance, with the inner circular members of this group being slightly lesser than the two end moons.

There are several satellites in operation. They are used for a number of purposes, including as the weather forecasting, amateur radio, television broadcasting, and the Global Positioning System. They use telescopes to look out at the planetary system in order to do research and collect data.

According to UNOOSA statistics from the Concerned Scientists, there are 8,261 satellites orbiting Earth as of December 2022, although only 4,852 among them are currently in use.

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The Efficiency of an electric motor is 80%.

Efficiency=output work/dW

=200/250%

=80%

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Ratio of distances of image and object respectively = ratios of heights of image and objects respectively

This implies

(1.7/600) = (x/1) ........ ( X is largeness of letter on retina)

x= 0.002833333 cm

What is retina?

The retina is the innermost, light-sensitive layer of eye tissue in most vertebrates and some mollusks. The optics of the eye create a focused two-dimensional image of the visual world on the retina. The retina processes that image within the retina, sending nerve impulses along the optic nerve to the visual cortex to produce vision. The retina functions in many ways similar to the film and image sensors in cameras.

The neural retina consists of several layers of neurons connected by synapses and supported by an outer layer of pigment epithelial cells. The main light-sensitive cells in the retina are photoreceptor cells, of which there are two types: rods and cones. Rods work primarily in low light and provide monochromatic vision. Cones function in bright environments, use different opsins to perceive color, and are responsible for sharp vision used for tasks such as reading. A third type of photosensitive cell, the photosensitive ganglion cell, is important in entrainment of circadian rhythms and reflex responses such as the pupillary light reflex.

Therefore, x= 0.002833333 cm

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Answer:He is placed in a centrifuge (r = 20.0 m) and spun at a constant angular velocity of 15.0 rpm ... He is then slowed and brought to a stop in 2.0 minutes. a.

Explanation:Gravity is the force that pulls an object towards the center of the earth. The value of the acceleration due to the gravity on earth is 9.8 m/s2. g = GM/r2 is the equation used to calculate acceleration due to gravity.

Mostly on density and pressure of the gas sample, doubles remain the same.

Both freezing and boiling temperatures of water serve as the foundation for the two most popular test temperatures, Celsius (C) or Fahrenheit (F). There are 100 steps between the two locations on the Celsius scale and 180 on the Fahrenheit scale. Additionally, scientists employ the Kelvin units of the International System (K).

Definition. The entire energy of all internal molecular motion makes up an object's heat. The heat conduction or average temperature of a molecules within a substance is measured by temperature. S.I. Unit.

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The statement "when we observe the CMB light we are seeing back in time (farther away) than quasars -- the farthest galaxies we can see" is true.

The Cosmic Microwаve Bаckground, or CMB, is rаdiаtion thаt fills the universe аnd cаn be detected in every direction. The furthest light we cаn see is the CMB, which is the light left over from the Big Bаng, forming аt just 380,000 yeаrs аfter our cosmic birth.

The CMB light is the furthest back in time that we have seen, and we cannot see light from earlier times because that light was scattered and the universe was opaque. So, CMB cаrries informаtion аbout the very eаrly universe.

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The direction of the force of sliding friction is always that of velocity of the object.

Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight.

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