A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that six different wavelengths are observed when the hydrogen relaxes back to the ground state. (a) What is the wavelength of the incident beam? nm Explain the steps in your solution This answer has not been graded yet. (b) What is the longest wavelength in the emission spectrum of these atoms? nm (c) To what portion of the electromagnetic spectrum does it belong? --Select (d) To what series does it belong? Select B (e) What is the shortest wavelength? nm (f) To what portion of the electromagnetic spectrum does it belong? -Select (g) To what series does it belong?

Answer:

B is the answer!!

Explanation:

Answer:

No speed is when there is a line on the horizontal axis where speed=0. Constant speed is when there is a horizontal line above the horizontal axis.

Explanation:

People may experience:

Headache: can be acute or persistent

Whole body: blackout, fatigue, or poor balance

Cognitive: amnesia, disorientation, or mental confusion

Sleep: sleep disturbances or sleepiness

Gastrointestinal: nausea or vomiting

Also common: irritability, mild depression, ringing in the ears, or sensitivity to light

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Answer:

headache, dizziness, disorientation, and nausea.

Explanation:

A concussion is any sudden impact to the head or acceleration or deceleration without impact. A concussion disrupts normal brain activity and can be dangerous. The symptoms include headache, dizziness, disorientation, and nausea.

Answer:

1). Average speed = 1.5 m per second

2). Average velocity = 1.5 m per second

Explanation:

1). Since, speed is a scalar quantity

   Therefore, average speed of the trip = \(\frac{\text{Total distance covered}}{\text{Total time taken}}\)

    From the graph attached,

   Total distance covered = 10 + 10 + 20 + 0 + 20 + 30

                                           = 90 meters

   Total time taken = 60 seconds

    Average speed = \(\frac{90}{60}\)

                               = 1.5 meter per second

2). Velocity is a vector quantity.

    Therefore, average velocity = \(\frac{\triangle d}{\triangle t}\)

                                                   = \(\frac{d_{60}-d_0}{60-0}\)

                                                   = \(\frac{90-0}{60-0}\)

                                                   = 1.5 meter per second                        

Answer:

2.5=10xm is the correct one

Explanation:

Answer:

-14

Explanation:

Answer: not very sure

=11074.4089

Explanation:

637000/57.52 = 11074.4089

The warmth from the water is flowing to the ice and melting it and The warmth from the burner is flowing to the cold water and increasing its temperature.

Convection, which is essentially the mass transfer of heat, is the process by which heat is moved from one place to another by the movement of fluids. The transport of heat into the atmosphere involves one of three processes: radiation, conduction, or convection.

Heat flow occurs when a hot object transmits its heat through a conductors to a cooler, similar to how high-energy objects impart their power to low-energy objects. How well a conductor transfers heat will impact how quickly and how much heat is transported.

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Answer:

Assumption: the acceleration of this vehicle is constant until it comes to a stop.

Acceleration: \((-2)\; \rm m\cdot s^{-2}\).

The acceleration of this vehicle is negative because the velocity of this vehicle is decreasing over time.

Explanation:

Assume that the acceleration of this vehicle, \(a\), is constant. The SUVAT equations would apply.

The time \(t\) required for braking is neither given nor required. Hence, make use of the SUVAT equation \(v^{2} - u^{2} = 2\, a\, x\) to relate \(u\), \(v\), \(a\), and \(x\!\).

Rearrange this equation to find an expression for \(a\), the acceleration of this vehicle:

\(\begin{aligned}a &= \frac{v^{2} - u^{2}}{2\, x} \\ &= \frac{(0\; \rm m\cdot s^{-1})^{2} - (10\; \rm m \cdot s^{-1})^{2}}{2\times (25\; \rm m)} \\ &= \frac{0^{2} - 10^{2}}{2 \times 25}\; \rm m \cdot s^{-2} \\ &= -2\; \rm m\cdot s^{-2}\end{aligned}\).

Acceleration is the rate at which velocity changes over time.

The velocity of the vehicle in this question is getting smaller over time. Hence, the rate of change of the velocity of this vehicle (that is, the acceleration of this vehicle) would be a negative number.

The frequency of the travelling wave is found to be 20 Hertz.

The relationship between the frequency of the wave, the wavelength of the wave and the speed of the wave is given by

V = fy

Where,

V is the speed of the travelling wave,

F is the frequency of the travelling wave,

y is the wavelength of the travelling wave.

The speed of the travelling wave is given to be 500m/s and the wavelength of the travelling wave is 25m.

Now, putting all the values,

500 = f(25)

f = 500/25

f = 20Hz

So, the frequency of the travelling wave is 20Hz.

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The length of nylon rope from which a mountain climber is suspended has a force constant of 1.15 ✕ 104 N/m.

Spring constant is the common name for the force constant. Hooke's law states that F=-kx. k=N/m is used to replace units in the equation where F is force, x is displacement, and k is force constant (spring constant) to determine the SI unit of force constant (spring constant).

The slope (gradient) of the graph equals the force constant. The proportionality constant, or k, is also known as the force constant in physics. A spring that is more rigid will have a higher value for k. The graph is no longer a straight line beyond point A since the gradient has changed and the formula F = Kx is no longer valid.

Maximum speed is at equilibrium where:

F = kx ⇒x =F/k

Now, F x=1/2mv²+1/2kx²

Solving we get,

V=F/√mk=Vmax

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Answer:

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The electric flux that flows through the loop is 4.27 Nm²/C, and the loop's normal ought to be rotated by about 39.5 degrees.

Electric flux is a characteristic of an electric field and refers to the number of electric field lines that cross a specific area. Electric field lines, according to this theory, begin with positive electric charges and end with negative electric charges.

Part a: The following formula must be used to determine the electric flux through the loop:

= E A cos() Since the electric field is parallel to the x-axis and the loop is circular, the area of the loop can be calculated as follows:

By substituting the given values for A = r², we obtain:

A = (0.177m)² = 0.0985 m² = 67.9° = 1.184 radians = (47.6 N/C)  (0.0985 m²)  cos(1.184)  4.27 Nm²/C Part (b) In order to determine the angle at which the flux through the loop becomes 0.304 Nm²/C, we can rewrite the equation for electric flux to account for:

= cos(-1)(/(EA))) By substituting the values provided, we obtain:

= cos(-1)(0.304 Nm²/C / (47.6 N/C  0.0985 m²))  = 39.5°; consequently, the loop's normal should be rotated by approximately 39.5°.

electric flux is a property of an electric field that can be described as the number of electric lines of force—also known as electric field lines—that cross a specific area. Electric field lines are thought to start with positive electric charges and end with negative electric charges.

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The work done in moving a positive charge q = 11 nC from point B to point A can be calculated using the formula W = Fd.

In physics, work is a measure of the energy transfer that occurs when a force is applied to an object and the object moves in the direction of the force. Work is calculated as the product of the force and the distance moved in the direction of the force. Mathematically, we can express work as W = Fd, where W is the work done, F is the force applied, and d is the distance moved in the direction of the force.

Now, let's apply this concept to this question. Work is done in moving a positive charge q = 11 nC from point B to point A. In this case, we can assume that there is an electric field present that is causing the charge to move. The electric field exerts a force on the charge, which causes it to move from point B to point A.

The work done in moving the charge can be calculated using the formula I mentioned earlier, W = Fd. In this case, the force is the electric force exerted on the charge by the electric field, and the distance moved is the distance between point B and point A.

The electric force can be calculated using Coulomb's law, which states that the force between two charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. Since we know the charge q of the moving charge and the properties of the electric field, we can calculate the force on the charge and then use the formula for work to find the work done in moving the charge from B to A.

So, in summary, the work done in moving a positive charge q = 11 nC from point B to point A can be calculated using the formula W = Fd, where F is the electric force exerted on the charge by the electric field and d is the distance between point B and point A. The electric force can be calculated using Coulomb's law, which relates the force to the properties of the charges and the distance between them.

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To learn about the velocity and disk stars to find the velocities increasing point.

What is velocity?

Velocity is the rate of change in direction of an object in motion as measured by a specific standard of time and observed from a specific point of reference (for example, 60 km/h northbound).

What is disk stars?

The stars on disks are Population I stars. This indicates that they are relatively young stars with circular orbits in the plane of the galaxy. They typically have a lot of metal. Due to the abundance of gas and dust on the disk, vigorous star formation occurs there.

By observing the graph the curve is gradually increasing with increase in distance.

Thus the velocity is increasing with the distance after the highlighted graph.

Therefore, the velocity is increasing with the distance after the highlighted graph.

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The 3.0m long copper rod increases in length the most when heated from 10°C to 50°C.

The increase in length of a material due to heating is determined by its coefficient of thermal expansion (CTE). Copper has a CTE of 16.5 x 10^-6 / *C. Using the formula ΔL = L0 * CTE * ΔT, where ΔL is the change in length, L0 is the original length, CTE is the coefficient of thermal expansion, and ΔT is the change in temperature, we can calculate the increase in length for each copper rod.

For the 1.0m rod:
ΔL = 1.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 1.32 x 10^-3 m

For the 2.0m rod:
ΔL = 2.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 2.64 x 10^-3 m

For the 3.0m rod:
ΔL = 3.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 3.96 x 10^-3 m

Therefore, the 3.0m copper rod increases in length the most.

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Answer: set up proportions

Explanation:

1. The jet covers a distance of 8193.38 meters before taking off.

2. The acceleration of the car is 0.44 m/s² and the car is 43.68 meters away from its starting point at 14 seconds.

1. For the first question, we can use the formula:
distance = initial velocity × time + 0.5 × acceleration × time²
Since the jet starts from rest, the initial velocity is 0. Therefore, the distance covered before take off can be calculated as follows:
distance = 0 × 50.25 + 0.5 × 6.50 × (50.25)² = 8193.38 meters (rounded to two decimal places)
Therefore, the jet covers a distance of 8193.38 meters before taking off.
2. For the second question, we can use the formula:
distance = 0.5 × acceleration × time²
Since the car starts from rest, the initial velocity is 0. Therefore, the distance covered can be calculated as follows:
15 = 0.5 × acceleration × (7.5)²
Solving for acceleration, we get:
acceleration = 15 / (0.5 × 7.5²) = 0.44 m/s² (rounded to two decimal places)
Therefore, the acceleration of the car is 0.44 m/s².
To determine where the car is at 14 seconds, we can use the formula:
distance = initial velocity × time + 0.5 × acceleration × time²
Since we don't know the initial velocity, we can use the formula:
distance = (final velocity)² - (initial velocity)² / (2 × acceleration)
We can solve for the final velocity using the formula:
final velocity = initial velocity + acceleration × time
Putting it all together, we get:
distance = ((initial velocity) + acceleration × time)² - (initial velocity)² / (2 × acceleration)
Simplifying, we get:
distance = initial velocity × time + 0.5 × acceleration × time²
Using the values given, we get:
distance = 0 + 0.5 × 0.44 × (14)² = 43.68 meters (rounded to two decimal places)
Therefore, the car is 43.68 meters away from its starting point at 14 seconds.

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Answer:

1. direction of propagation of sound

2.medium through which sound trsnsmitted

Answer:  B

Explanation:  AN increase in heat out

Answer:

A: Wavelength  

B: Crest  

C: Trough

D: Amplitude

Answer:

A:

✔ crest

B:

✔ amplitude

C:

✔ trough

D:

✔ wavelength

Explanation:

Answer:

The balloon needs a vertical velocity of approximately 22.14 m/s to reach the window

Explanation:

The given parameters are;

The destination of the designed water balloon we shoot = The 3rd story window

The height of the 3rd story window which the water balloon should reach = 25 m

Therefore, we have, the equation of motion of the water balloon given as follows;

v² = u² - 2 × g × s

Where;

\(u_y\) = The initial vertical velocity of the balloon

\(v_y\) = The final vertical velocity of the balloon = 0 m/s

g = The acceleration due to gravity = 9.8 m/s

s = The height the balloon is intended reach at the final velocity becomes 0 m/s = The height of the 3rd story window

∴ s = 25 m

Substituting the values, we have;

0² = \(u_y\)² - 2 × 9.8 × 25

\(u_y\)² = 2 × 9.8 × 25 = 490

\(u_y\) = √490 = 7·√10

The initial vertical velocity of the balloon = \(u_y\) = 7·√10 m/s

Therefore, the balloon needs a vertical velocity of 7·√10 m/s which is approximately 22.14 m/s to reach the window.

To determine the maximum load P that can be applied to the aluminum thing-a-ma-jiggy, we need to first make a section cut at the location of interest and provide a free body diagram (FBD) showing the internal forces at the cut.

Assuming the load is applied perpendicular to the 70 mm side of the thing-a-ma-jiggy, the section cut would be made through the center of that side. The FBD would show a normal force (N) acting on the cut surface, along with a shear force (V) and a bending moment (M) acting on the entire cross-section.

To determine the maximum load P, we need to use the given allowable stress and the properties of the aluminum cross-section. The area of the cross-section is A = 18 mm x 30 mm = 540 mm^2. The moment of inertia about the x-axis (parallel to the 30 mm side) is Ix = (1/12) x 30 mm x (18 mm)^3 = 174,960 mm^4.

From the bending moment equation M = (P x L)/4, we can solve for P as P = (4 x M)/L. Substituting the maximum bending moment (which occurs at the center of the cross-section) and the length L = 30 mm, we get P = (4 x (allow x Ix))/L = (4 x 200 MPa x 174,960 mm^4)/30 mm = 4,666,400 N or approximately 4.67 MN.

Therefore, the maximum load P that can be applied to the aluminum thing-a-ma-jiggy is 4.67 MN.

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The resistance of the wire is 55.56 Ω.

The resistance of the wire can be found using Ohm's law, which states that the resistance (R) is equal to the voltage (V) divided by the current (I).

In physics, resistance is the measure of how much a material opposes the flow of electric current through it. Resistance can refer to several different things depending on the context, but in general, it refers to opposition or the act of pushing against something.

In this case, the voltage is 20V and the current is 0.36A.

Using Ohm's law, we can find the resistance as follows:

R = V/I

R = 20V/0.36A

R = 55.56 Ω

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a) The greenhouse effect refers to the process by which certain gases in the Earth's atmosphere trap and re-emit heat from the sun, leading to a warming effect on the planet's surface.

These gases, including carbon dioxide, water vapor, methane, and others, act like a blanket around the Earth, absorbing and trapping the sun's radiation and preventing it from escaping into space.

b) Atmospheric water vapor is a key component of the Earth's climate system, as it plays a crucial role in the greenhouse effect. As water vapor absorbs and re-emits radiation from the sun, it helps to trap heat in the atmosphere and keep the planet warm.

However, the amount of water vapor in the atmosphere is strongly influenced by temperature and other factors, which can in turn affect climate patterns and weather events.

c) The increased concentration of carbon dioxide in the atmosphere changes the climate because it enhances the greenhouse effect. Carbon dioxide is a particularly potent greenhouse gas, as it absorbs and re-emits radiation across a range of wavelengths, effectively trapping more heat in the atmosphere. As humans burn fossil fuels and engage in other activities that release carbon dioxide into the air, the concentration of this gas increases, leading to a buildup of heat-trapping gases and a corresponding increase in global temperatures.

d) The melting of continental glaciers and sea ice in polar regions can accelerate the rise in temperature through a process known as positive feedback. As the ice melts, it exposes more land and water, which in turn absorb more solar radiation and heat up. This leads to further melting, which exposes even more land and water, and so on.

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Answer:

(a) k = 80 N/m   (b) x = 75 cm

Explanation:

The question says that, "A spring is elongated 30 centimeters when we exert a force of 24 N on it a) calculate the value of the spring constant b) calculate the elongation of the spring when applying a force of 60 N"

Given that,

Force exerted on the spring, F = 24 N

Elongation in the spring, k = 30 cm =0.3 m

(a) We know that, the force on the spring is given by :

F = kx

Where

k is spring constant

So,

\(k=\dfrac{F}{x}\\\\k=\dfrac{24}{0.3}\\\\k=80\ N/m\)

(b) When F = 60 N,

\(x=\dfrac{F}{k}\\\\x=\dfrac{60}{80}\\\\x=0.75\ m\\\\x=75\ cm\)

Hence, this is the required solution.

The kinetic energy of a body whose mass is 150kg covering a total distance of 115km/hr is 76,512.27J.

Kinetic energy is the energy possessed by an object because of its motion, equal (nonrelativistically) to one half the mass of the body times the square of its speed.

Kinetic energy = ½ mv²

Where;

According to this question, a body of mass 150kg is covering a total distance of 115km/hr.

115km/hr = 31.94m/s

K.E = ½ × 150 × 31.94²

K.E = 76,512.27J

Therefore, 76,512.27J is the kinetic energy of the body.

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The angular acceleration of the propeller is 7.54 rad/s²

This can be defined as the rate of change of angular velocity. The S.I unit of angular acceleration is rad/s.

The angular acceleration of the propeller can be calculated using the formula below.

⇒ Formular:

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Note: The negative sign tells that the propeller is slowing down.

Hence, The angular acceleration of the propeller is 7.54 rad/s²

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Ice at 0 degrees celsius is mixed with water at 0 degrees celsius in a perfectly insulated calorimeter.what happens depends on the relative masses of ice and water,some of the ice will melt and the final temperature will be 0 degrees Celsius.So the correct options are 1,2 and 3.

The amount of ice that melts depends on the relative masses of ice and water. If there is more ice than water, then all of the ice will melt. If there is more water than ice, then some of the ice will remain. The final temperature will be 0 degrees Celsius regardless of how much ice melts.

Option 4 is incorrect because the water is already at 0 degrees Celsius, so it cannot freeze. Option 3 is incorrect because heat is not being transferred into or out of the system, so the temperature will not change.Therefore correct option are 1, 2 and 3.

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The gravitational force of attraction between two objects is 2.964 x 10⁻9 N. So, the correct option is D.

Gravitational force is defined as the force of attraction experienced by a body due to the gravity of earth.

Here,

Mass of each body,

m₁ = m₂ = 5 kg

Distance between the masses, r = 0.75 m

The equation for gravitational force is given by,

F = Gm₁m₂/r²

where G is the gravitational constant.

Therefore,

F = (6.67 x 10⁻¹¹x 5 x 5)/(0.75)²

F = 166.75 x 10⁻¹¹/0.5625

F = 2.964 x 10⁻9 N

Hence,

The gravitational force of attraction between two objects is 2.964 x 10⁻9 N.

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