2. A science book is being pushed across a table. Can the book have a constant speed and a
changing velocity? Explain.

The box experiences a 40.8N frictional force as it moves across the horizontal surface.

Friction is the force that stops motion when the surfaces of two things come into contact. In other words, friction reduces the mechanical advantage of a machine and lowers the output to input ratio. The force produced between surfaces that slide against one another is known as the frictional force.

Frictional Forces are classified into four different types, they are rolling, sliding, static and kinetic friction. Another important type of friction is Fluid Friction.

f max​ =μN

       =μ(mg+Fsin53 0 )=0.2(8×10+1 )=40.8N

Fmax = 40.8N

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A hydrogen atom with energy -0.850 eV has the maximum possible angular momentum of 1ℏ.

To determine the maximum possible angular momentum (l) of a hydrogen atom with energy -0.850 eV, we first need to find the principal quantum number (n). The energy of a hydrogen atom can be calculated using the formula:

E = -13.6 eV * (Z² / n²)

Where E is the energy, Z is the atomic number (1 for hydrogen), and n is the principal quantum number.

-0.850 eV = -13.6 eV * (1² / n²)

Solving for n, we get n ≈ 2.

The maximum possible angular momentum (l) can be determined using the relation l = n - 1. In this case, l = 2 - 1 = 1. Therefore, the maximum possible angular momentum of a hydrogen atom with energy -0.850 eV is 1ℏ.

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The resultant distance of the vector is 12.1 m and the angle between two vectors are 48.4°. So the x-component of this vector is, Aₓ = 8.0335 m

Vector is a product that means a parameter has two types of property one is value second is direction. If a parameter has both then it called a vector quantity. Example: Velocity.

To calculate the vector we know first this is a proper vector quantity or not. According to the question, this is a vector quantity. So it has two component, one along x axis another is y axis as shown in the picture.

We have to calculate the x-component, so we are using the formula is,

Aₓ = Acosθ

Here we are given,

A = The resultant distance of the vector = 12.1 m

θ= The angle between two vectors = 48.4°.

Now We have to calculate the x-component = Aₓ

Now we put the known values in the above equation, we get

Aₓ = Acosθ

Or, Aₓ = 12.1*cos(48.4°)

Or, Aₓ = 8.0335 m

According to the calculation we get, the x-component of this vector is, Aₓ = 8.0335 m

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Answer:

Explanation:

hey the top of me tried there hardest to find you all a answer instead of saying the person who posted this left a blank so what its just a blank stop being so rude to them they are just trying to help and they helped me on my work that i done so don't be so rude because there just trying there hardest!! :)

To find the volume of a three-dimensional symmetrical shape using integration, we can use the method of cylindrical shells. This method involves dividing the shape into thin cylindrical shells and then integrating their volumes.

Let's say we have designed a symmetrical solid in the shape of a sphere with a cylindrical cavity running through its center. We will place the flat side (R) of the sphere against the x-y plane. The sphere will be revolving around the z-axis since it is symmetrical about that axis.

To find the volume, we first need to determine the equations for the sphere and the cavity.

The equation for a sphere centered at the origin with radius R is:

x^2 + y^2 + z^2 = R^2

The equation for the cylindrical cavity with radius r and height h is:

x^2 + y^2 = r^2,  -h/2 ≤ z ≤ h/2

The volume of the solid can be found by subtracting the volume of the cavity from the volume of the sphere. Using the method of cylindrical shells, the volume of each shell can be calculated as follows:

dV = 2πrh * dr

where r is the distance from the axis of rotation (the z-axis), and h is the height of the shell.

Integrating this expression over the appropriate range of r gives the total volume:

V = ∫[r1, r2] 2πrh * dr

where r1 and r2 are the radii of the cavity and the sphere, respectively.

Substituting the expressions for r and h, we get:

V = ∫[-h/2, h/2] 2π(R^2 - z^2) dz - ∫[-h/2, h/2] 2π(r^2 - z^2) dz

Simplifying and evaluating the integrals, we get:

V = π(R^2h - (1/3)h^3) - π(r^2h - (1/3)h^3)

V =  πh( R^2 - r^2 ) - (1/3)πh^3

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The angular acceleration and the angle through which the blade has turned in this time is 20 rad/s² and 490 radians, respectively.

To find the angular acceleration (α), we can use the formula:
ω = ω₀ + αt
Solving for α, we get:
α = (ω - ω₀) / t
α = (140 rad/s - 0 rad/s) / 7.00 s
α = 20 rad/s²

To find the angle (θ) through which the blade has turned, we can use the formula:
θ = ω₀t + 0.5αt²
Since ω₀ is 0, the formula simplifies to:
θ = 0.5αt²
θ = 0.5 * 20 rad/s² * (7.00 s)²
θ = 490 radians

So, the angular acceleration is 20 rad/s², and the angle through which the blade has turned is 490 radians.

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One piece of evidence that suggests Triton is a captured moon is its retrograde orbit around Neptune, which means it orbits in the opposite direction of Neptune's rotation, a characteristic commonly observed in captured objects.

Multiple lines of evidence support the hypothesis that Triton, the largest moon of Neptune, is a captured moon. One significant piece of evidence is Triton's retrograde orbit, which means it orbits in the opposite direction of Neptune's rotation.

Retrograde orbits are uncommon for moons formed in the same protoplanetary disk as their host planet. This suggests that Triton may have originated elsewhere and been captured by Neptune's gravitational pull. Additionally, Triton's highly inclined and eccentric orbit further supports the capture theory.

Its orbit is tilted relative to Neptune's equator and is more elongated than typical moons formed in situ.

These characteristics align with expectations for a captured object, as gravitational interactions during capture can alter the moon's orbit and result in these unique orbital properties observed in Triton.

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Initial velocity U = 0

Final velocity V = 32.23 m/s

Explanation:

Given that a coin is dropped from the top of the Tower of Pisa, 53m above the ground.

What is the coin's initial velocity ?

Since the coin is dropped from the tower, the initial velocity U will be equal to zero.

Therefore, U = 0

But the final velocity V will be calculated by using the formula

V^2 = U^2 + 2gH

V^2 = 0 + 2 × 9.8 × 53

V^2 = 1038.8

V = sqrt ( 1038.8)

V = 32.23 m/s

sorry if did not help :(

Answer:

She would travel 175.5 m in the same amount of time

Explanation:

Here is the complete question:

Seven bicyclist are racing. Each bicyclist rides for 9s. If a bicyclist, with initial velocity of zero, steadily gained speed until reaching a final velocity of 39m/s, how far would she travel during the race in the same amount of time)?

Explanation:

To determine how far she would travel in the same amount of time, that is the distance she would cover in the same amount of time

From the question,

The bicyclist has an initial velocity of zero

That is, u = 0 m/s

and a final velocity of 39 m/s

That is, v = 39 m/s

Each bicyclist rides for 9s,

She also traveled for the same amount of time

that is, t = 9s

To determine the distance,

From one of the equations of motion for linear motion

s = \(\frac{1}{2}\) t(u + v)

Then

s = \(\frac{1}{2}\) (9)(0+39)

s = 4.5 (39)

s = 175.5 m

Hence, she would travel 175.5 m in the same amount of time

The temperature scale that places zero at the point where all atomic and molecular motion ceases is Kelvin. This is known as the absolute temperature scale and is based on the theoretical concept of absolute zero, which is equivalent to -273.15 degrees Celsius.

The Kelvin temperature scale is often used in scientific applications, particularly in physics and chemistry. It is an absolute temperature scale that measures temperature based on the kinetic energy of particles in a substance. At absolute zero, the particles have no kinetic energy and therefore have a temperature of 0 Kelvin.

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Answer:

students need to take courses in math, such as calculus, linear algebra, and statistics. Computer science classes also are essential, because physicists and astronomers often develop specialized computer programs that are used to gather, analyze, and model data.

The given statement is that the temperature in degrees Fahrenheit in times square during a day in August can be predicted by the function t(x).

Hence, it can be stated that the function t(x) provides a prediction for the temperature in degrees Fahrenheit in Times Square for a given value of x. Here, x represents the input variable.

It is important to note that the input variable must be provided in the correct units and format as required by the function t(x).The content loaded refers to the data that has been previously collected and is available for analysis. In the context of predicting temperature using function t(x),

the content loaded can refer to temperature data collected in Times Square during August on previous days or years. This data can be analyzed and used to develop the function t(x) that predicts temperature for a given input variable x.

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In enzyme catalysis, binding energy is essential. Proteins known as enzymes serve as catalysts for chemical reactions by reducing the activation energy necessary for the reaction to take place.

Binding energy is the amount of power needed to separate two or more particles held together by an external force, such as the strong nuclear force or the electrostatic force. It is a crucial idea in physics and chemistry that aids in the explanation of a variety of events, including the structure of atomic nuclei and the creation of chemical bonds between atoms. Binding energy is essential in biological systems as well because it is essential for DNA replication, protein folding, and enzyme catalysis. The specificity and effectiveness of these biological processes are determined by the strength of the binding energy between a ligand and its target molecule, and even tiny changes in the binding energy can have a big impact on the system's overall performance.

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Answer:

Two teams are playing tug of war. Team A pulls to the right with a force of 450 N. Team B pulls to the left with a force of 415 N

Answer:

A. 35 N to the right.

EXPLANATION: 450 is going to the right so you subtract what is going against it. Which gives you 35. And because 450 is bigger than 415, it'll be going to the right.  

You'll See After You Have an Answer!

Explanation:

For instance, on my answer, you'll see a button presenting the words "Mark Brainliest"

Answer:

Explanation:

To find the volume of the object we use the formula

volume of object = final volume of water - initial volume of water

From the question

final volume of water = 86 mL

initial volume of water = 75 mL

So we have

volume of object = 86 - 75

We have the final answer as

Hope this helps you

We have that the  the speed of block Baner  is mathematically given as

vb=3.667m/s

Right

Mass of an object is defined as a body of matter that takes up as specific space calculated in Kg.

Speed:This is defined as the rate at which a body moves in certain direction.

Generally the equation for the Conservation law  is mathematically given as

\(ma'va'+mb'vb'=mavamvvb\\\\Therefore\\\\vb=\frac{100*4+150*0-(100*(-1.5))}{150}\\\\vb=\frac{550}{150}\\\\\)

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It will takes approximately 0.165 seconds for the ball to reach the floor after it has been gently pushed off the table top from a height of 1.3 m above the floor.

When an object is dropped from a height, it falls to the ground due to the force of gravity.

When an object is released from a height of 1.3 m above the ground, the time it takes to reach the ground is calculated using the formula:

h = 0.5gt²  where h is the height of the object, g is the acceleration due to gravity and t is the time taken for the object to reach the ground.

Rearranging this formula to solve for t, we have: \(t = \sqrt{(2h/g)}\)

Substituting the values we have: \(h = 1.3 mg = 9.81 m/s^{2} t = \sqrt{(2 \times 1.3 / 9.81)t} = \sqrt{(0.265 / 9.81)t} = \sqrt{0.027t } = 0.165 seconds\)

Therefore, it takes approximately 0.165 seconds for the ball to reach the floor after it has been gently pushed off the table top from a height of 1.3 m above the floor.

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The ratio of the potentials of these surfaces is 1.2,

Option choice C is correct.

The potential at any point on an equipotential surface is constant.

Since both spheres are equipotential surfaces, the potential at the center of sphere A is equal to the potential at any point on sphere A, and likewise for sphere B.
The potential at the center of sphere A due to the point charge is given by the formula

V = kq/r,

where k is the Coulomb constant,

q is the charge,

and r is the distance from the charge to the point.

In this case,

V = kq/RA.
The potential at the center of sphere B due to the point charge is given by the same formula,

but with r = RB.

So V = kq/RB.
Taking the ratio of these two potentials, we get:
VA/VB = (kq/RA)/(kq/RB)
VA/VB = (RB/RA)
VA/VB = 0.0012/0.0010
VA/VB = 1.2.

Option choice C is correct.

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Answer:

I think b sorry if wrong

Explanation:

it b sorry if wrong

Answer:

Given that these particles make up atoms, they are often referred to as subatomic particles. There are three subatomic particles: protons, neutrons and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge:

Answer:

Si tienen diferencia

Explanation: Internas: Proviene de la herencia; el legado genético que las personas reciben de sus padres.

Externa: Provienen de las experiencias personales frente

al mundo exterior

Answer:

An object is thrown upward from a height of 640ft with an initial velocity of 48f(t)/(s), the time take for the object to reach the ground is  1.5 seconds.

The given problem can be solved by using the formula for the time of motion of an object in free fall, i.e., t = (v-u)/g, where v is the final velocity, u is the initial velocity, and g is the acceleration due to gravity, which is equal to 32 ft/s². It is important to note that the initial velocity in this case is positive as the object is being thrown upwards.

The given initial velocity is 48 ft/s and the object is thrown upward from a height of 640 ft, so the initial displacement is also positive, i.e., s₀ = 640 ft.

The final velocity is 0 ft/s as the object comes to rest on the ground.

Therefore, using the formula, t = (v - u) / g⇒ t = (0 - 48) / (-32)⇒ t = 1.5 seconds.

So, the time taken by the object to reach the ground is 1.5 seconds.

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The speed of sound is affected by temperature. A drop in room temperature of 20 degrees Celsius will cause the speed of sound to decrease. The resolution of the experiment should be good enough to detect this change, depending on the accuracy of the temperature measurement and the sensitivity of the equipment used.

The speed of sound will decrease at low temperature because the speed of sound is directly proportional to the square root of the absolute temperature. Therefore, as the temperature decreases, the speed of sound also decreases.

To determine if the resolution of your experiment is good enough to detect this change, you would need to calculate the difference in the speed of sound at the two temperatures and compare it to the resolution of your measuring instrument.

For example, if the speed of sound at room temperature (20°C) is 343 m/s and the speed of sound at 0°C is 331 m/s, the difference is 12 m/s. If the resolution of your measuring instrument is 1 m/s, then it would be able to detect this change. However, if the resolution is 20 m/s, then it would not be able to detect this change.

Therefore, the resolution of your experiment must be smaller than the difference in the speed of sound at the two temperatures in order to detect the change.

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(a) Displacement for each part of the motion:

Δx_a = 2

Δx_b = -3

Δx_c = -4

Δx_d = 5

(b) Resultant vector diagram:

    →      →      →     →

   Δx_a   Δx_b   Δx_c   Δx_d

Connecting the tail of the first vector (Δx_a) to the tip of the last vector (Δx_d), we get the resultant vector.

(c) Resultant displacement: Δx_resultant = Δx_a + Δx_b + Δx_c + Δx_d = 2 - 3 - 4 + 5 = 0

(a) The displacement for each part of the motion is given by the number of steps taken in the positive or negative x direction.

(b) In the resultant vector diagram, the vectors are drawn tip to tail to represent their magnitudes and directions. By connecting the tail of the first vector to the tip of the last vector, we obtain the resultant vector which represents the net displacement.

(c) To find the resultant displacement, we simply add up the individual displacements. In this case, adding Δx_a, Δx_b, Δx_c, and Δx_d yields a resultant displacement of 0. This means that the final position is the same as the initial position, indicating that the overall displacement is zero.

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To solve this problem, we need to use conservation of energy. The spring has elastic potential energy due to being stretched, which will be transferred into kinetic energy as the glider moves.

At the release point, all of the potential energy will be converted into kinetic energy, so we can use the equation \(KE = 0.5mv^2 to solve for v.\)

We can also use the force required to hold the spring at 0.350 m to calculate the spring constant, k, using Hooke's Law (F = -kx).

Once we have k, we can calculate the maximum displacement of the glider (x = -0.100 m)

Use conservation of energy to solve for v. The correct answer is C) 2.87 m/s.

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Thus using method of superposition, the total displacement is 0.0276.

A36 steel beam is used Cantilever beam is loaded. The moment of inertia is I. For A36 steel beam, I = 6667 in4 (approx.)As per the method of superposition, the total displacement of the beam at point B is given as follows:δtotal = δP + δWWhere,δP is the displacement of point B due to the point loadδW is the displacement of point B due to the uniformly distributed load.

Considering point load,P = 1500 lb. Distance of the point load from point B = 5 ft. Thus, the moment at point B due to point load can be calculated as follows: MBP = PL = 1500 × 5 = 7500 lb-ft. Similarly, considering uniformly distributed load,W = 200 lb/ft. Thus, the moment at point B due to uniformly distributed load can be calculated as follows:Mbw = (wL2)/12Where,L is the length of the beam= 10 ft

Therefore, Mbw = (200 × 102)/12 = 1667 lb-ft (approx.)Thus, total moment at point B,M = MBP + MBW= 7500 + 1667= 9167 lb-ft. Thus, using the formula for deflection of cantilever beam,δP = (PbL2)/(2EI) = (1500 × 52)/(2 × 29 × 106 × 6667) = 0.0026 inδW = (WbL3)/(3EI) = (200 × 5103)/(3 × 29 × 106 × 6667) = 0.024 in

Therefore, the displacement at point B is 0.0276 in.

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During the spring, the air mass which most likely brings record-breaking high temperatures to the eastern half of the united states is Maritime tropical (mT).

At low altitudes, the mT air masses are extremely warm and humid. This air mass likely experiences inversions in the evening that keep moisture from rising to the higher troposphere levels. The subtropical high's eastern side is more stable than its western side.

As a result, the eastern side is drier than the western side, which frequently experiences clouds and precipitation. The temperature at the dew point is higher than 60 °F. In an mT air mass, these high dew points are highly uncomfortable.

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