What is the energy of the photon emitted when an electron in a mercury atom drops from energy level f to energy level b?

Answer:

Gotta be it

Explanation:

m1*v1 = m2*v2

1200*v1 = 1600*3

1200*v1  = 4800

v1 = 4800 / 1200

v1 = 4.0 m/s

Answer:

Gravitational force is an attraction between masses. The greater the size of the masses, the greater the size of the gravitational force (also called the gravity force). The gravitational force weakens rapidly with increasing distance between masses

The resultant physical quantity, velocity is 1.7 m/s. The correct option is A.

When two  vectors are represented by vectors, their resultant will be the closing side of the triangle.

A model airplane heads due east at 1.50 meters per second, while the wind blows due north at 0.70 meter per second.

The right angle triangle is formed from the two velocity vectors and its resultant will be its hypotenuse.

Then, from the Pythagoras theorem,

Vr ² = (0.70)² + (1.50)²

Vr = 1.65 m/s

Thus, the resultant velocity is approximately  1.7 m/s.

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If the current is held constant, an increase in voltage will result in an increase in resistance.

hope it helps...!!!

v² = u² + 2as

v² = 4² + 2 × 1.2 × 20

v² = 16 + 2 × 12/10 × 20

v² = 16 + 48

v² = 64

v = 8 ms - 1

ii)

V = u + at

8 = 4 + 1.2 × t

8 - 4 = 1.2t

4 = 12/10 t

4 × 10 /12 = t

3.33 = t

Average velocity = Displacement/Time

20/3.33

6.006 ms - 1

Hi there!

We can begin by deriving the magnetic field strength for a circular loop at its center.

Using Biot-Savart's Law:
[tex]dB = \frac{\mu_0}{4\pi }\frac{idl \times \^r}{r^2}[/tex]

μ₀ = Permeability of free space (Tm/A)

dl = Differential length element

r = radius (m)

We can rather use 'ds' to represent a differential arc length since we are finding the magnetic field for a circular loop.

We must begin by dealing with the cross-product. Luckily, this derivation is simple since the radius vector is ALWAYS perpendicular to the path of integration along the loop's circumference. (ONLY if we are finding the field for the direct center.) Thus, since sin(90) = 1, we can get rid of the cross-product.

Therefore:

[tex]dB = \frac{\mu_0}{4\pi }\frac{ids}{r^2}[/tex]

Now, we can integrate with respect to ds.

[tex]= \frac{\mu_0}{4\pi }\int\limits^{2\pi r}_0 {\frac{i}{r^2}} \, ds\\\\ = \frac{\mu_0}{4\pi }{\frac{i * 2\pi r}{r^2}} \, ds[/tex]

Simplify:

[tex]B = \frac{\mu_0 i_{circle}}{2r}\\[/tex]

Now, for a straight conductor (assuming of infinite length), we know the magnetic field strength equation to be:

[tex]B = \frac{\mu_0 i_{rod}}{2\pi r}[/tex]

Set the two equal.

[tex]\frac{\mu_0 i_{circle}}{2r}= \frac{\mu_0 i_{rod}}{2\pi r}[/tex]

Cancel out '2', μ₀, and 'r':
[tex]i_{circle}}= \frac{ i_{rod}}{\pi }[/tex]

Plug in the given values and solve.

[tex]40\pi = i_{rod}\\\\i_{rod} = \boxed{125.663 A}[/tex]

Answer:

low.

Explanation:

it makes the flow easier if its lower because, the resistance isn’t pushing as hard against the flow which means that the flow is easier.

[tex]speed_{avg} = \frac{Σ\:distance}{ total\: time}[/tex]

So, according to the question:

distance = 90 miles

time = 1h 45min + 15 min + 1h = 3h

[tex]Therefore:\\ speed_{avg} = \frac{90}{3} mph \\ = \boxed {30 \: mph}[/tex]

Answer: The power station converts stored chemical energy in the fuel to kinetic energy in the raised temperature of the steam that pushed a turbine to rotate the generator that makes electricity.

So chemical to thermal (kinetic) to thermal to kinetic to electrical. Then mostly to heat or movement.

Loads of losses, thermal, mostly.

Explanation: hopes this helps

In all of the power plants, electricity is generated by rotating turbine inside a magnetic field. That is why,  power plant transfers mechanical energy into electric energy. That is why, it  doesn’t make electricity.

An industrial facility for the production of electricity is referred to as a power plant. In most cases, power plants are wired into a grid.

A revolving device called a generator, which transforms mechanical power into three-phase electric power, is found in many power plants. An electric current is produced by the movement of a conductor in relation to a magnetic field.

The majority of power plants throughout the world produce electricity by burning fossil fuels including coal, oil, and natural gas. Nuclear energy and the usage of renewable energy sources including solar, wind, geothermal, and hydroelectricity are examples of low-carbon power sources.

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Answer: B. On the right side

Explanation: Metals are located on the left of the periodic table, and nonmetals are located on the upper right.

Answer:

A

Explanation:

d = 1/2 a t^2 = 1/2 (4)(28^2) = 1568 m  ~ 1.6 x 10^3

Answer: i'll tell them to be careful. However, the most common is using a drill bit. Take a step close to the shore and listen for cracking. If there is cracking, do not risk going out on the ice. If there is no cracking, take a cordless drill and check the thickness using an extended drill bit.

Sonar is used to determine the speed of an object. The object is moving at 8.4146 m/s.

The frequency of any wave is defined as the number of cycles per second.

The frequency of the sound received is

f' = f x [(V+Vo /V-Vo)]

where f = 40kHz, f' = 42kHz, V =345 m/s, then the velocity of the observer will be

(V+Vo /V-Vo) = 42/40 =1.05

On rearranging the doppler shift formula, we have

Vo = 0.05 x 345 /2.05

Vo = 8.4146 m/s.

Thus, the object is moving at 8.4146 m/s.

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Answer:

Here is the answer

Here is the answerExplanation:

Here is the answerExplanation:Bay of Pigs Invasion is the answer

The net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).

The net electric force on the charges is calculated as follows;

F = kq₁q₂/r²

where;

[tex]|r| = \sqrt{(x_2-x_1)^2+ (y_2-y_1)^2} \\\\|r| = \sqrt{(-4--4)^2+ (0--3)^2} \\\\|r| = \sqrt{(0)^2 + (3)^2} \\\\|r| = 3 \ units[/tex]

[tex]F_{net} = \frac{kq_1q_2}{3^2} \\\\F_{net} = \frac{1}{9} (kq_1q_2) , \ N[/tex]

Thus, the net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).

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Answer:

16  2/3 hr

Explanation:

250 000 km / 15 000 km/hr =  16 2/3 hours

Answer:

60W

Explanation:

A higher watt bulb allows more electricity through, therefore the resistance must be lower.

Solved your another question same like this with scaling to Cm this time we go with metre(m)

Scale factor

Mercury

Ven us

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Answer:

What is the interaction between two different species in an ecosystem called?

Interactions between different species in a community are called interspecific interactions—inter- means "between." Different types of interspecific interactions have different effects on the two participants, which may be positive (+), negative (-), or neutral (0).

Explanation:

Answer:

Animals follow the seasons very closely. Changes in the length of the day or temperature affect the animals' hormone production and cause them to behave according to the season. For that reason, animals instinctively know when it's time for them to mate, build a nest, fly south or stock up on food for the winter.

Answer:

real depth / apparent depth = R.I.

Real depth = 1.5 x 1 = 1.5 m

Answer:

it’s going to be times 3

Explanation:

so the answer would be three times which means it will change by a factor of 3.

I’m sorry I wrote it wrong the first time.

When q₂ is place between q₁ and q₃, the net force on q₂ is 0.486N.

The electrostatic force of attraction or repulsion is proportional to the product of magnitude of charges and inversely proportional to the square of distance between them.

Force on q₂ due to q₁

F₁₂ = kq₁q₂ / r₁₂²

Substitute the values provided , we get

F₁₂ = 9 x 10⁹ x 5 x 10⁻⁶ x 2.5 x 10⁻⁶ / (0.5)²

F₁₂ = 0.414 N

Force on q₂ due to q₃ placed at distance 0.25m

F₂₃ =kq₂q₃ / r₂₃²

Substitute the values, we get

F₂₃ =  9 x 10⁹ x 2.5 x 10⁻⁶ x 2.5 x 10⁻⁶ / (0.25)²

F₂₃ = 0.9N

The net force F =F₂₃ -F₁₂

F =0.9 - 0.414 = 0.486 N

Thus, the net force of q₂ is 0.486 N.

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Answer:

0.45

Explanation:

trust me

An expression which can be used to evaluate the relative error in g (in terms of h, Δh, t, and Δt) is: [tex]\delta = \frac{t^2(h\;+\Delta \;h) }{h(t\;+\;\Delta t)^2} - 1[/tex]

Relative error can be defined as a measure of the ratio of an absolute (real) value of a measurement to an expected (theoretical) value. Also, it's independent of the magnitude of its values.

In order to write this expression, we would divide the absolute (real) value by the expected (theoretical) value as follows:

[tex]\delta = \frac{g(h\;+\;\Delta h,t \;+ \;\Delta t) - \;g(h,t)}{g(h,t)} \\\\\delta = \frac{g(h\;+\;\Delta h,t \;+ \;\Delta t) }{g(h,t)} - 1\\\\\delta = \frac{t^2(h\;+\Delta \;h) }{h(t\;+\;\Delta t)^2} - 1[/tex]

Note: g = 2h/t²

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Answer:

the detection of the equivalence point, the point at which chemically equivalent amounts of the reactants have been mixed.