Find the energy required to excite a hydrogen electron for the following cases.
Part A
from the ground state to the third excited state
?E = eV

The centripetal acceleration of the car driving at a constant speed of 21 m/s around a circle with a radius of 100 m is calculated to be 4.41\(m/s^2.\)

To find the centripetal acceleration of the car, we can use the formula:

a = \(v^2\) / r

where "a" represents the centripetal acceleration, "v" is the velocity of the car, and "r" is the radius of the circular path.

Given that the car drives at a constant speed of 21 m/s and the radius of the circle is 100 m, we can substitute these values into the formula to calculate the centripetal acceleration.

a = (21\(m/s)^2\)/ 100 m

a = 441 \(m^2/s^2\)/ 100 m

a = 4.41 \(m/s^2\)

Therefore, the centripetal acceleration of the car is 4.41\(m/s^2.\) This centripetal acceleration represents the inward acceleration that keeps the car moving in a circular path, and its magnitude is determined by the square of the velocity divided by the radius of the circle.

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Answer: D.

Explanation: Just took the quiz.

Answer:

D. F represents the activation energy

Explanation:

Answer:

Car A has a velocity of 40 km/hr  west.

Explanation:

The velocity of an object is a vector quantity. It has both magnitudes as well as direction.

Arrows are used to show direction.

Car A is moving towards west. Car B is moving towards east-south direction. Car C is moving towards South direction. Car E is moving towards North direction.

So, the correct option is (a) i.e. Car A has a velocity of 40 km/hr  west.

The terminal end of a motor nerve and a muscle (skeletal, smooth, or cardiac) form the neuromuscular junction (NMJ), which is a synaptic connection.

It is the location where the action potential is sent from the nerve to the muscle. The NMJ is regarded as a cholinergic synaptic junction that serves as the link between motor neurons and fibers of skeletal muscle. The NMJ should transmit the impulses from the presynaptic motor neurons to the postsynaptic muscle fibers in order to maintain sustained skeletal muscle contraction.

The word "neuromuscular" refers to this process of transmitting the acetylcholine-dependent nerve impulse (action potential) from neuron to muscle. The NMJ, also known as the motor endplate, is made up of synaptic membranes on either side of the presynaptic and postsynaptic membranes.

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Answer:

this are dances formed mainly in communities.

Explanation:

they are done naming of children,worshipping or during initiation ceremonies

Answer:

D

Explanation:

projectile motion

is the answer

Answer:

The answer is B.

Explanation:

This is because the loyalists did not agree with fighting back against Britain and wanted to remain a part of Britain, while the other answers show examples of people who wanted to break away from or rebel against Britain

You are running 4.2 m/s along a tall roof top. You have 590,646 Joules of mechanical energy and have a mass of 300 kg. The building is 200 meter tall.

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.

kinetic energy + potential energy = mechanical energy

Kinetic energy = \(\frac{1}{2} mv^{2}\) = 2646 joule

potential energy = ME - KE

P E = 590646 - 2646 = 588000 Joule

P E = mgh

h = P E / mg

h = 200 meter

You are running 4.2 m/s along a tall roof top. You have 590,646 Joules of mechanical energy and have a mass of 300 kg. The building is 200 meter tall.

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Answer:

Outer core?

Explanation:

The energy is being transferred out of the field.

Answer: Noise above 70 dB can cause hearing damage

Explanation:

Answer:

The decibel level that starts to have hearing damage is 120 dB.

Explanation:

DPP is a method of capital budgeting. It is the length of time required to recover the initial cash outflow discounted at a specific interest rate.

(i) Discounted Payback Period (DPP): It is a method of capital budgeting. It is the length of time required to recover the initial cash outflow discounted at a specific interest rate. Benefit/Cost Ratio (BCR): It is the ratio of the present value of benefits to the present value of costs. It is used in cost-benefit analysis to identify whether a proposed project or investment is feasible.

(ii) Elements of Bookkeeping: Cash book, purchase book, sales book, journal, ledger. Profit and Loss Account: It is an account that records a company's profits and losses for a specific period of time.

(iii) Common important finance ratios are: Current Ratio, Quick Ratio, Debt-Equity Ratio, Inventory Turnover Ratio, Debt-Service Coverage Ratio.

(iv) BFD, PFD & PID: Block Flow Diagram (BFD), Process Flow Diagram (PFD), and Piping and Instrumentation Diagram (PID) are used to illustrate the process flow.

(v) Gantt Chart: A Gantt chart is a project management tool that uses horizontal bars to represent the duration of tasks or activities in a project.

(vi) Ethics & Professionalism: Ethics and professionalism are the practices that professionals in a particular field must adhere to. It includes the principles of honesty, transparency, fairness, and accountability.

(vii) Heuristics for Storage Vessels and Pressure Vessels: Heuristics for storage vessels and pressure vessels include choosing the correct diameter to height ratio, selecting the right material of construction, designing suitable supports, and selecting appropriate insulation.

(viii) Heuristics for Reactors and Heat Exchangers: Heuristics for reactors and heat exchangers include determining the appropriate size and shape, selecting the right material of construction, and designing suitable internals.

(ix) Heuristics of Distillation and Absorption Towers: Heuristics for distillation and absorption towers include choosing the correct column diameter, selecting appropriate packing materials, and designing suitable feed locations.

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The average velocity of Iguana is -2.55m/s when it crawls from 5m to -18m in 9 seconds.

Average velocity of a body is defined as the total displacement divided by the total time taken by the body.

Here, initial position of iguana is 5m and the final position of the iguana is -18m.

Total displacement D is,

D = final position - initial position.

D = -18-5

D = -23m

Total time taken by the iguana is 9.0 seconds.

Average velocity(V) = total displacement/total time taken.

Putting values,

V = -23/9

V = -2.55m/s.

So, the average velocity of the iguana is -2.55m/s.

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Most red galaxies, which are often elliptical galaxies, can be found in the red sequence. Most blue galaxies, the majority of which are spirals, are found in the blue cloud in Magnitude-color diagram.

The green valley, which contains some red spirals, is a sparsely populated area that lies between the two distributions. Magnitude-color diagram of the galaxy Three populations are shown in this fictitious galaxy Magnitude-color diagram: the red sequence, the blue cloud, and the green valley. The absolute magnitude (a metric of luminosity) and mass of galaxies are related, as seen by the galaxy color-magnitude diagram.

The absolute magnitude (a metric of luminosity) and mass of galaxies are related, as seen by the galaxy color-magnitude diagram. Eric, provided a preliminary explanation of the three sections of this graphic in 2003.

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Answer:

A

Explanation:

Use the conservation of energy formula to calculate the velocity of the ball when it reaches the halfway point (10m down). Then, use your calculated value to obtain the kinetic energy.

Answer:

A. 49 on Plato

Explanation:

Its the right one trust me .

In order to get a stone slab to move, one would have to apply force to it. This can be done in a number of ways, depending on the situation. Here are a few possible laws that could be proposed for moving a stone slab:1. Newton's first law of motion: This law states that an object at rest will stay at rest unless acted upon by an external force. Therefore, to move a stone slab, one would need to apply a force to it.

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Answer:

4 m/s

Explanation:

KE =

Velocity of balloon will be 4 m/s.

!! Hope It Helps !!

Answer:water

Explanation:

Water may be a nutrient that makes up 60% of our body weight. it's important in many functions, it's part of every cell in every tissue in the body.

Water carries other nutrients to all or any parts of the body, it carries waste out of the body and it helps to manage body temperature. When you run or play sports your body heats up pretty quickly.

Your body starts to sweat as a way to get rid of the heat. When the sweat evaporates on your skin your body and blood get cool. it's very important to replace the fluid that is lost by sweating so as not to become dehydrated.

If you get dehydrated the body cannot cool itself anymore and your performance will drop. Without enough water, whether you're exercising or sitting all day, you're at risk for dehydration which can be fatal

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Billy jumps upward with a velocity of 4.2 m/s off a 6m high diving board.  . Billy will take 0.43 sec  to hit the water

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics.

using equation of kinematics

v = u + g*t

sign convention

positive y direction (upward) = +

negative y direction ( downward )  = -

v = u - g*t

0 = 4.2 - ( 9.8 * t )

t = 4.2 / 9.8

t = 0.43 sec

Billy will take 0.43 sec  to hit the water

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Answer:

400 m

Explanation:

20m/s x 20s = 400m

Answer:

Explanation:

The work done by an object can be found by using the formula

From the question

force = 5N

distance = 20m

We have

workdone = 5 × 20

We have the final answer as

Hope this helps you

Answer:

5m/s

Explanation:

400m/ 20+60s

= 400/ 80 m/s

5 ms-1

No, Sally's list is not complete. Matter can exist in four different states: solid, liquid, gas, and plasma. All four states of matter have energy and should be included in Sally's list.

What is energy?
Energy, which is observable in the work performed as well as in the form of heat and light, is indeed the quantitative property that's also transferred to a body or a physical system in physics. Energy is a conserved resource; according to the principle of conservation of mass, energy can only be transformed from one form to another and cannot be created or destroyed. The joule is the SI's (International System of Units) measuring unit for energy (J). The kinetic energy of the a moving object, this same potential energy held by an object (for example, due to its position inside a field), the elastic energy held in a fixed material, chemical energy linked to chemical reactions, and cosmic rays conducted by electromagnetic radiation are examples of common forms of energy.

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Answer:

A) lacks the mass of the object

The magnetic field at points (0, 0, -1 cm) and (0, 0, 10 cm) due to the current-carrying ring. To find the magnetic field at different points around a current-carrying ring, we can use Ampere's law for a circular loop.

The formula to calculate the magnetic field at a point on the axis of a circular loop is given by:
B = (μ₀ * I * R²) / (2 * (R² + z²)^(3/2))
Where:
B is the magnetic field at the point,
μ₀ is the permeability of free space (4π × 10^(-7) T·m/A),
I is the current flowing through the ring,
R is the radius of the ring, and
z is the distance between the point and the center of the ring along the axis.
Radius of the ring (R) = 5 cm = 0.05 m,
Current flowing through the ring (I) = 50 mA = 50 × 10^(-3) A.
(a) Point (0, 0, -1 cm):
In this case, the distance (z) between the point and the center of the ring is -2 cm = -0.02 m. Substituting the values into the formula, we get:
B = (4π × 10^(-7) T·m/A * 50 × 10^(-3) A * (0.05 m)²) / (2 * (0.05 m)² + (-0.02 m)²)^(3/2)
Simplifying the expression will give us the magnetic field at point (0, 0, -1 cm).
(b) Point (0, 0, 10 cm):

In this case, the distance (z) between the point and the center of the ring is 9 cm = 0.09 m. Substituting the values into the formula, we have:
B = (4π × 10^(-7) T·m/A * 50 × 10^(-3) A * (0.05 m)²) / (2 * (0.05 m)² + (0.09 m)²)^(3/2)

Simplifying the expression will give us the magnetic field at point (0, 0, 10 cm).  

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Wavelength is the distance between successive crests (or troughs) of a wave.

Using the equation E = hf, we can calculate the frequency of the wave using the given energy.

E = hf

3.810x1020J = (6.626x10-34J·s)f

f = 5.741x1015Hz

Using the equation c = λf, we can calculate the wavelength of the wave using the calculated frequency.

c = λf

3.00x108m/s = λ(5.741x1015Hz)

λ = 5.21x10-7m.

Hence, the wavelength of that EM wave was λ = 5.21x10-7m.

What is Wavelength?

Wavelength is the distance between two successive crests (or troughs) of a wave. It is a measure of the length of a wave, and is usually measured in meters. Wavelength is an important concept in physics, especially in the fields of electromagnetism and optics, as it is related to the frequency and energy of a wave. Wavelengths can range from fractions of a nanometer to kilometers in size.

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Melting and vaporizing require input of energy, while freezing, condensing, subliming have a net output of energy.

Phase changes refer to the physical changes that matter undergoes when it transforms from one state to another. The process can either require the input of energy or release energy.

Melting and vaporizing are examples of phase changes that require the input of energy, as they need energy to break the bonds holding the molecules together.

On the other hand, freezing, condensing, and subliming are processes that have a net output of energy.

Freezing releases energy as molecules slow down and form solid bonds, while condensing releases energy as molecules come together to form a liquid.

Sublimation also releases energy as a solid changes directly to a gas without passing through the liquid phase.

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Answer:

Bro I know this

Explanation:

Answer:

Explanation:

A classic projectile motion question. Horizontal motion does not matter whatsoever in the context of this equation as we are looking at the vertical component of velocity only. Since the question states that it is fired horizontally, there is no vertical component of velocity. Thus, v0y = 0.

Assuming the projectile is on the Earth, we can use the free-fall acceleration, 9.8 m/s^2.

The question gives us Δy, which is 37.3m.

Using the second kinematics equation, Δy = v0t + (at^2)/2, we can substitute in the values.

37.3 = 0 + 0.5(9.8)t^2

37.3 = 4.9t^2

7.61224489796 = t^2

t = 2.75902970226 seconds.