if a falling ball made a perfectly elastic collision with the floor, would it rebound to its original height? explain.

Answer:

Explanation:

Given:

t = (1/3) min = (60/3) s = 20 s

V = 300 m

_______________________

D - ?  

Distance:

D = V·t

D = 300·20 = 6 000 m

If you strike the pipe with supports placed at the nodes for the first vibration mode, you will experience a vibration that has a frequency of about 5 Hz.

The amplitude of this vibration will be approximately 1.5 mm and it will occur in a single direction. This means that the pipe will vibrate up and down, but not side to side.

The vibrations caused by striking the pipe will not last very long. In fact, they are only likely to last for about 0.1 seconds before they disappear entirely. They may also cause damage to nearby objects like walls or furniture if they are located too close to where you strike the pipe.

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The car will move fast with the velocity of 32.03 m/s

Calculation

Initial velocity(u) = 5.9 m/s

Distance traveled = 3.3 km = 3300 m

Time = 2.9 min = 2.9×60 = 174 seconds

Formula,

[tex]s=\frac{1}{2} (u+v)t[/tex]

[tex]3300=\frac{1}{2} (5.9+v)*174[/tex]

[tex]v= (\frac{6600}{174} -5.9)m/s[/tex]

v = 37.93–5.9 = 32.03 m/s

Hence, the car will move fast with velocity = 32.03 m/s

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The total amount of energy that a star emits each second is measured by its luminosity.

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Yes, a spectrophotometer can be used to measure the absorption of a particular wavelength of light that is not visible to a normal human eye.

Even though we can't directly perceive this light's absorption, it can be quantified. We may calculate concentration by using a spectrophotometer, which detects the absorption of light at particular wavelengths (whether visible or not) by a solution. The number of chemicals in a solution or the amount of light absorption may be measured using the common and affordable method of spectrophotometry.

Each substance in the solution either absorbs or transmits light over a certain wavelength when a light beam is directed through the sample. Combining them with colored derivatives that are visible and measurable. Another is that colorless substances typically absorb light from the part of the spectrum that is invisible to the unaided eye, as measured by a spectrophotometer.

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The direction of the polarized light after passing the first and the second filter are the same, however the intensity of the light after passing the first and second polarizer are half and fourth of its original intensity, respectively.

Light polarization is a filter of electromagnetic waves such that it propagates into one transmission axis only.

When light passes through a polarizer, its intensity will decrease by half.

Suppose the intensity of unpolarized light is  I₀,  after passing the first polarizer, its intensity becomes:

I₁ = 1/2 . I₀

After passing the second polarizer, the intensity will further decrease by half, or:

I₂ = 1/2 . I₁

I₂ = 1/2 .1/2 . I₀ = 1/4. I₀

Since both polarizers are vertical filters, then the direction of the polarized light after passing the first and the second filter are the same.

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The capacitor with a larger capacitance will allow the bulb to remain lit for a longer period of time as compared to the capacitor with a smaller capacitance. We first created the largest capacitance by decreasing the separation and increasing the area and connected it to 1.5 V.

We then disconnected it and connected it to the bulb and observed how it was glowing. Then we obtained the lowest capacitance by increasing the separation and decreasing the area and again connected it to 1.5 V.  Again, we disconnected it and connected it to the bulb and observed how it was glowing.

If you place a capacitor in a circuit containing a light bulb and a battery it will first charge the capacitor, and during that charge a non-zero current will flow through the circuit, lighting the light bulb. Capacitors can carry more current as the frequency of the supply voltage increases. As we have seen, alternating current can flow through a circuit with capacitance. The apparent resistance of a capacitor in an AC circuit is less than its DC resistance.

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Newton's first law states that an object at rest will remain at rest, and an object in motion won't change its velocity while the equilibrium condition is met.

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The magnitude of the magnetic field that is required in which the coil should rotate in order to produced required EMF is 0.09T.

The EMF induced in a rotating coil is given by the relation,

E = NBA(2πf)

Where,

E is the EMF induced,

N is the number of turns,

B is the magnetic field,

A is the area of the coil,

f is the frequency of the generator.

The frequency is given to be 60Hz, the EMF induced is 5145V, the number of coils is 160 turns and the area of the coil is 0.94m², putting the values,

5145 = 160 x B x 0.94 x 2 x 3.14 x 60

B = 0.09 T.

So, the magnitude of the required magnetic field is 0.09T.

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Answer:

Explanation:

Protons carry   an equal magnitude of charge compared to electrons.

A) an equal magnitude of charge

Protons carry an equal magnitude of charge compared to electrons. Thus, option A is correct.

A proton is a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of the opposite sign.

An electron is a stable subatomic particle with a negative electric charge, found in all atoms, and acts as the primary carrier of electricity in solids.

Although the mass of a proton is much larger than that of an electron, the magnitudes of their charges are equal.

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The scatter plots of log (length) vs. log (time) have a linear relationship, while the residual plot lacks any discernible patterns.

Learn to identify situations that can be described by power models, inverse power models, and quadratic models in the "Power Models" unit. You'll also learn to compare patterns in tables and graphs of models with the formulas y = ax2, y = ax3, y = a/x2, y = a/x3, and y = ax2 + bx + c.

They also start to grasp the concept of rate of change within the context of these models. Here, some specific abilities are developed, such as simplifying exponential and radical expressions and solving quadratic equations graphically. The terms and ideas of direct and inverse variation are also taught.

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When ray estimation of geometric optics cannot be used, wave optics—also known as physical optics—is concerned with the study of numerous phenomena like polarization, diffraction, interference, and other occurrences.

wavelength of light = 633 nm = 633*10-9 m,

the angle θ = 1.20 / 2 = 0.6

condition for diffraction minimum,

d sin θ = mλ

for first minimum n = 1

d sin θ = λ,

and as a result,

slit width d = λ / sinθ = (633*10-9 m) / sin0.6 = 6.04×10 −5m

The various wave optics kinds are:

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Thus, more than 30 J of potential energy can be loosed by the ball. Thus, the gravitational potential energy of the ball is more than 30 J.

If there is no air resistance, the ball's potential energy is entirely transformed into kinetic energy. When air resistance is taken into account, a portion of the potential energy is used to overcome it. Thus, AU > AKE. In the current scenario, a ball gains 30 J of kinetic energy while falling and is treated as encountering air resistance. The energy that an object retains due to its position in relation to other objects, internal stresses, electric charge, or other factors is known as potential energy in physics. The potential energy will be transformed into kinetic energy if the stones fall. High on the tree, branches have the potential to fall, which gives them energy. Chemical potential energy exists in the food we eat.

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Answer:

It's climate sensitivity.

Should a 40-kg youngster sit for a 60-kg uniform board's scale to read zero at x = 0.61 m from the left end Support for the 2.4 m long piece comes from a pivot 80 cm from the left end and a scale at the right end.

Given the information that M = 60 kg and m = 40 kg, Force is viewed as a reading. The provided pivot point's torque, N, is equal to Force*(2.4 - 0.80) = 1.6 Force. (counterclockwise)

0.4*60*9.8 = 235.2 N-m is the torque of magnesium about the specified pivot point (clockwise)  

Mass m should be positioned to the left scale of the pivot, and its torque should be calculated as follows:

mg*(0.80 - x) = 40*9.8*(0.80 - x) = 392

when Force = 100 N

note 1.6Force = 160 235.2 (0.80 -x)

160 + 392(0.8 - x) = 235.2

x = 0.61 m

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To the left. When a force is applied to stop it from moving, frictional force provides resistance.It always moves in the opposite direction of an item in motion

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A 1,400 kg airplane encounters a 200 newton headwind that slows it down. if the airplane was originally traveling 230 m/s .  It take 12 minutes for the headwind to slow the airplane to 120 m/s

Force = mass * acceleration

- 200 N = 1400 * ( change in speed / time interval )

- 200= 1400 * (120 - 230 / time )

-200 = 1400 * ( -110 / time )

time = 770 seconds = 12 minutes

It take 12 minutes for the headwind to slow the airplane to 120 m/s

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Beating a magnet on an object is not a method of making magnets. The correct option to this question is B.

Paper-clip  Note Magnet

Making a magnet out of a paper clip is the simplest method.

Collect goods: A small piece of metal can be used to create a quick temporary magnet, like a paper clip or a refrigerator magnet.

The induction approach entails merely bringing the magnetic material (soft iron) close to a powerful magnet without making contact.

Magnet using the electro magnetic approach in an image

Utilizing transmitters, electromagnetic (EM) techniques produce powerful, time-varying main magnetic fields that cause electrical currents to flow through conductive rocks.

Instead of moving it back and forth in the same direction, rub the paperclip magnet against the object. To fire a game, make the same swift action.

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Slewing the aircraft at low altitude is the only way of getting the cockpit from turning black after you get so high on the x plane 11 avro rj 100 jet. These are the traditional aircraft variety.

If you fly at high altitude in an aircraft which is not pressurized (or with wrong pressurization settings), the cockpit and external views will darken and then go black. If it happens, try slewing the aircraft at low altitude (<10.000 ft) and see if the image reappears after a while.

An aircraft is a vehicle or machine that is able to fly by gaining support from the air and has cockpit. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.

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Two projectiles of mass and are fired at the same speed but in opposite directions from two launch sites separated by a distance, will land at a place x = D/2 [ 1+{ (m₁ - m₂) / m₁ + m₂)}

This is calculated using the conservation of linear momentum in the horizontal direction as ,

(vm₁vₓ₁ - m₂vₓ₁ ) ₓî = (m₁ + m₂) vₓ₂ ₓî

vₓ₂ = {(m₁ - m₂) / m₁ + m₂)} × vₓ₁

vₓ₂ = {(m₁ - m₂) / m₁ + m₂)} × v Cos Θ

t max = vₓ₁ / g

=  v Sin Θ / g

x =(D / 2) + vₓ₂t max

= (D / 2) { {(m₁ - m₂) / m₁ + m₂)} × v² Sin Cos Θ / g } ------ (1)

now,

D = 2 vₓ₁vₓ₂ / g

D / 2 = v² Sin Cos Θ / g

From equation (1) we get,

x = D/2 [ 1+{ (m₁ - m₂) / m₁ + m₂)}

Hence , D/2 [ 1+{ (m₁ - m₂) / m₁ + m₂)} is the place they will land.

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The spring compresses if it is an elevator accelerating upwards at 3g is Option A. a)16x

Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.

Calculation:-

Gravitational acceleration = g

Spring constant of the spring = k

Mass of the first block = m1

Compression of the spring due to the first block = X1

m1g = kX1

Mass of the second block = 4m1

Upward acceleration of the elevator = 3g

The force from the spring on the second block = F

Compression of the spring due to the second block in the elevator = X2

From the free-body diagram of the 4m1 block,

(4m1)(3g) = F - 4m1g

F = 16m1g

kX2 = 16m1g

kX2 = 16(kX1)

X2 = 16X1

Compression of the spring due to a 4m1 block placed on it in an elevator accelerating upwards at 3g = 16X1.

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This planet is less massive than the Earth, as we can deduce.

What is meant by the orbital period?

A measure of how long it takes for one complete orbit of a celestial body to complete In terms of time, "the orbit period depends on the satellite altitude." the length of time needed for one cycle of a phenomenon that repeats itself frequently.

What are rotation and revolution?

An object rotating around its axis is referred to as turning. An object's orbital movement around another thing is called a "revolution." A 24-hour day, for instance, is created when the Earth rotates on its axis. The 365-day year results from the Earth's rotation around the sun.

Therefore, it is lesser massive than Earth.

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Kinetic energy of Corvette with a mass of 1,054 kg and a velocity of 48m/s is 12,14,208 J

Kinetic energy is a type of power that an item or particle possesses as a result of motion. An object accelerates and acquires kinetic energy when it undertakes work—the transfer of energy—by being subjected to a net force. Kinetic energy is one of the properties of a moving object or particle, which depends on both mass and speed. The type of motion can be any combination of vibration, rotation on an axis, and translation (or transit along a path from one spot to another).

A body's translational kinetic energy is equal to 1/2mv2, or one-half of the product of its mass, m, and square of its velocity, v.

Here,

m = 1,054 kg

v = 48 m/s

KE = ?

KE = 1/2 mv²

KE = [tex]\frac{1}{2}[/tex] × 1054 × 48²

KE = 0.5 × 1054 × 2304

KE = 12,14,208 J

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When the two magnets are made to move, the energy of the system in the system tends to change potential energy into the kinetic energy

Potential energy is the energy stored in the body while is at rest which would turn into kinetic energy when the object will initiate motion. This conversion of potential energy to kinetic energy is understood by the Work-Energy theorem. The kinetic energy is formulated as,

K.E. = 1/2 mv²

where K.E = Kinetic energy

m = mass of an object

v = velocity of the object

The work-energy theorem is stated as the products of all the forces acting on the system are equal to the difference in kinetic energies.

∑W = ΔK.E

where W = Work done on the system

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Answer:

inertia of motion ..........

Bernoulli's equation formula is a relation between pressure, kinetic energy, and gravitational potential energy of a fluid in a container. The formula for Bernoulli's principle is given as follows: p + 1 2 ρ v 2 + ρ g h = c o n s t a n t.

An object's kinetic energy is the energy it has as a result of motion. Applying force is necessary if we want to accelerate an object. We have to put in work to apply a force. After the work is finished, the object will be moving at a new, constant speed because energy has been transferred to it. The science of fluid mechanics examines how fluids—including liquids, gases, blood, and plasma—behave both at rest and while moving. There are numerous uses for fluid mechanics in astrophysics, chemical and mechanical engineering, and biological systems.

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The linear speed of the basketball at the bottom in m/s is 37.41 m/s.

The mechanical energy basket ball is conserved and the basket ball starts from rest. and roll down a hill of height 70m.

If mechanical energy is conserved,

Potential energy at top + kinetic energy at top = potential energy at bottom + kinetic energy at bottom.

At bottom, there is no potential energy, and at top, there is no kinetic energy.

Potential energy at top = kinetic energy at bottom.

Mgh = 1/2Mv²

M is the mass of the basketball,

v is the linear speed at the bottom,

h is the height of the ball.

Putting values,

v = √(2gh)

v = √(2x10x70)

v = 37.41m/s.

The speed of the basketball at the bottom is 37.41 /s.

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Answer:

b) Concave mirror

Explanation:

The type of mirror being used in the image is concave mirror. Dentist always use concave mirror to see patient's teeth. Hence, the option (b) is correct answer.

Answer: b or

✔ concave

Explanation:

Transverse waves cannot be formed in liquids or gases because they lack the ability to bend their shape. Transverse waves include, for instance, light waves.

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