Question 1 (1 point)
[02.01]
What are the characteristics of low energy waves? (1 point)
a
Long wavelengths and low frequencies
ООО
Short wavelengths and high frequencies
с
High frequencies and long wavelengths
Od
Low frequencies and short wavelengths

Answer:

An object with a positive acceleration is always increasing it's velocity.

In hydrogen atom the electronic transition from n= ∞ to n=1 corresponds to largest energy emission.

Electronic transition is the jump of an electron from one energy level to another energy level .

E = hc/λ

h= plank constant =6.62*10^(-34)

c=speed of light

λ= wavelength of emited electron .

Thus , we can conclude that the electronic transition from infinity to n=1 (ground state) corresponds to largest energy emission .

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Answer:

25.1

Explanation:

The vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

The given vector can be normalized before being multiplied by the desired magnitude. This is how to locate the vector:

The vector that has been provided should be normalized by dividing each of its components by its magnitude. The Pythagorean theorem can be used to determine the magnitude of the vector 4i - 3j + k:

Magnitude = √(4² + (-3)² + 1²) = √(16 + 9 + 1) = √26

Normalize the vector by dividing each component by the magnitude:

Normalized vector = (4/√26)i + (-3/√26)j + (1/√26)k

Multiply the normalized vector by the desired magnitude:

To obtain a vector with a magnitude of 5, multiply each component of the normalized vector by 5:

Desired vector = 5 * ((4/√26)i + (-3/√26)j + (1/√26)k)

Simplifying the expression gives:

Desired vector ≈ (20/√26)i + (-15/√26)j + (5/√26)k

So, the vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

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Nuclear fusion is the process that occurs when two or more atomic nuclei unite. In below given way words can be matched.

Nuclear fusion is the process that occurs when two or more atomic nuclei unite to generate one or more distinct atomic nuclei containing subatomic particles (neutrons or protons). The mass difference between both the products and the reactants manifests itself as either energy release or absorption.

1. Nuclear fusion of hydrogen into helium occurs in the CORE.

2. Energy moves through the sun's  CONVECTION ZONE by means of the rising of hot gas and falling of cooler gas.

3. Nearly all the visible light we see from the sun is emitted from the PHOTOSPHERE.

4. Most of the sun's ultraviolet light is emitted from the narrow layer called the CHROMOSPHERE where temperature increases with altitude.

5. We can see the sun's CORONA  most easily during total solar eclipses.

6. The  RADIATION ZONE is the layer of the sun between its core and convection zone.

Therefore, in above given way words can be matched.

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Answer:

rolling at 0.2 m/s. A 0.15 kg object rolling at 2 m/s.

Explanation:

answer choices. A 0.05 kg object

The 10/90 principle can be a powerful tool for taking control of your situation and improving your life. By taking responsibility for what you can change and focusing on your reaction to the situation, you can make positive changes in your life and become the master of your own destiny.

The 10/90 principle refers to the idea that life is made up of 10% of what happens to you and 90% of how you respond to it. In other words, you may not be able to control what happens to you, but you can control your reaction to it. By taking responsibility for what you can change rather than being a victim of what you cannot change, you can take control of your situation and improve your life.One example of a situation where the 10/90 principle could be applied is losing a job. Losing a job can be a devastating experience, and it can be easy to feel like a victim in this situation. However, by applying the 10/90 principle, you can take control of your situation and make positive changes in your life.The first step in applying the 10/90 principle in this situation would be to take responsibility for what you can change. This could mean updating your resume, networking with others in your field, and applying for new jobs. By taking action and doing what you can to find a new job, you are taking control of your situation and improving your chances of finding a new job.
The second step would be to focus on your reaction to the situation. Instead of dwelling on the negative aspects of losing your job, try to focus on the positive aspects. This could mean using the extra time to pursue a new hobby or spend more time with family and friends. By focusing on the positive aspects of the situation, you are taking control of your reaction and improving your overall well-being.
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Answer:

1.F: About 6*10^14 Hz

2.E: About 4*10^ -19 J

Explanation:

Frequency: We knew that the speed of a wave is its wavelength(λ)* frequency(f, in Hz).  By the wave-particle duality we know we can calculate the frequency of light in the same way. So, c=495nm *f, f=c/495nm=> (299,792,458 m/s) / (4.95*10^-7 m)

=6.05*10^14 /s

Energy: The energy photon contains can be calculate by this formula-- E=hf

f is the frequency and h is Planck's constant which is about 6.62 ×10^-34 *m^2*kg/s (after dimensional analysis ) =6.62*10^ -34 J*s.

So, the energy of a blue photon is (6.05*10^14)*(6.62*10^-34)=40.051*10^-20=  4.051*10^-19 J

The tax rate you will pay is displayed in tax brackets for each category of taxable income.

Thus, For instance, in 2022, the first $10,275 of your taxable income is subject to the lowest tax rate of 10% if you are single.

Up until the maximum amount of your taxable income, the following portion of your income is taxed at a rate of 12%.

As taxable income rises, the tax rate rises under the progressive tax system. Overall, this has the result that taxpayers with higher incomes often pay a greater rate of income tax than taxpayers with lower incomes.

Thus, The tax rate you will pay is displayed in tax brackets for each category of taxable income.

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Answer: The rock

Explanation:

The approximate mass of a dark star is 4.35 times the mass of the Sun.

To find the ratio of the mass of the dark star to the mass of the Sun, we can use the binary star formula, which states that the total mass of a binary star system is equal to the mass of the visible star divided by the sine of the angle between the line of sight and the line connecting the two stars:

m1 / sin i = (v² ×T) / (4 × pi² ×d)

where m1 is the mass of the visible star, v is the orbital velocity of the visible star, T is the orbital period of the visible star, i is the angle between the line of sight and the line connecting the two stars, and d is the distance between the two stars.

In this case, we are given the mass of the visible star (m1 = 6.9 Ms), the orbital velocity of the visible star (v = 270 km/s), the orbital period of the visible star (T = 18.1 days), and we can assume that the angle between the line of sight and the line connecting the two stars is 90 degrees (since we cannot see the dark star).

Substituting these values into the binary star formula, we get:

m1 / sin i = (270² × 18.1) / (4 ×pi² × d)

Since sin 90 = 1 and m1 = 6.9 Ms, we can simplify the equation to:

6.9 Ms = (270²× 18.1) / (4 × pi²× d)

Solving for d, we find that d = (270²× 18.1) / (4 × pi²× 6.9 Ms) = 2.43 x 10¹¹ meters.

Now that we know the distance between the two stars, we can use the binary star formula again to find the mass of the dark star. Substituting the values we have calculated into the binary star formula, we get:

m2 / sin i = (v²×T) / (4 × pi²× d)

where m2 is the mass of the dark star and v, T, and d are the same as before. Knowing that m1 = 6.9 Ms and sin i = 1, we can solve for m2 to find the mass of the dark star.

m2 = (v²×T × m1) / (4 × pi²× d)

Substituting the known values, we get:

m2 = (270²× 18.1 × 6.9Ms) / (4 × pi²× 2.43 x 10¹¹)

Simplifying, we find that the mass of a dark star is m2 = 8.7 Ms.

Therefore, the ratio of the mass of a dark star to the mass of the Sun is m2 / Ms = 8.7 / 1.99 = 4.35.

Therefore, the approximate mass of a dark star is 4.35 times the mass of the Sun.

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Answer:

To find the temperature when both are equal, we use an old algebra trick and just set �F = �C and solve one of the equations. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees.

Explanation:

Hope it is helpful.....

Answer:

To find the temperature when both are equal, we use an old algebra trick and just set �F = �C and solve one of the equations. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees.

Answer:

The road bank angle is 16.38⁰.

Explanation:

radius of curvature of the road, r = 50 m

allowable speed of car on the road, v = 12 m/s

The bank angle is calculated as;

\(\theta = tan^{-1} (\frac{v^2}{gr} )\)

where;

θ is the road bank angle

g is acceleration due to gravity = 9.8 m/s²

\(\theta = tan^{-1} (\frac{v^2}{gr} )\\\\\theta = tan^{-1} (\frac{12^2}{9.8 \times 50} )\\\\\theta = tan^{-1} ( 0.2939)\\\\\theta = 16.38 ^0\)

Therefore, the road bank angle is 16.38⁰.

If the magnification is -4 the the image is larger and is it inverted in nature.

The magnification of the body is given is -4, here the signs show the nature of the image and the numerical value is the times to which the object has been magnified. Here, it is inverted because there is negative sign and it is enlarged as the magnification is more than 1.

Therefore, a magnification of -4 indicates that the image is both inverted and larger than the object. The resultant picture will be a larger, inverted version of the object if it is seen via a lens or mirror with a magnification of -4.

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Answer:

6bar

Explanation:

According to pressure law;

P1/T1 = P2/T2

Given the following;

P1 = 1bar

T1  = 20oC

P2 = ?

T2 = 120oC

Substitute

1/20 = P2/120

20P2 = 120

P2 = 120/20

P2 = 6bar

Hence the new pressure will be 6bar

Answer:

Earth Day is observed globally

Explanation:

Answer:

mass

Explanation:

because as the mass increase kinetic energy also increase

Answer:

Near the Earth's surface, the acceleration due to gravity is approximately constant. ... Its value is = 6.673 x 10-11 N·m2/kg2. ... The mass of the moon is 7.35 x 1022 kg. ... moon, the distance to the center of mass is the same as the radius: r = 1.74 x ... Handwriting · Spanish · Facts · Examples · Formulas · Difference Between ...

Explanation:

The acceleration of gravity on the Moon is 1.62 m/s2. The mass of the Moon is 7.35 x 10^22 kg. From this information, then the radius of the Moon is 3 * 10¹² m.

The sole natural satellite of Earth is the Moon. With a diameter around one-quarter that of Earth (equivalent to the breadth of Australia), it is the largest and most massive compared to its home planet and the fifth largest satellite in the Solar System. The Moon is bigger than any known dwarf planets of the Solar System and is a planetary-mass object with a distinct rocky body, making it a satellite planet according to geophysical definitions of the word. There isn't much of an atmosphere, hydrosphere, or magnetic field there. With a surface gravity of 0.1654 g, it has a gravity that is around one-sixth that of Earth. Jupiter's moon Io is the only satellite in the Solar System that is known to have a greater gravity and density.

The Moon travels an average distance around Earth.

Given,

g = 1.62 m/s²

m = 7.35*10²² kg

according to formula,

g = GM/r²

1.62 = 6.67× 10⁻¹¹ m³ kg⁻¹ s⁻²*7.35*10²² kg/r²

solving this for r we get

r = 1.7 * 10⁶ m

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Given

distance of the object  u = -40 cm.

radius of curvature of the refracting surface  R = -20 cm.

The height of the object  h = 1 cm.

To Find

The size of the image

Solution

We will now write the following data using the sign convention:

The object's distance is u = -40 cm.

The refracting surface has a radius of curvature of R = -20 cm.

The object's height is h = 1 cm.

We know that the lens maker formula is: n2vn1u=n2n1R.

v denotes the image formation distance.

The refractive index of the second medium is n2=1.33, and the refractive index of the first medium is n1=1.

In the preceding equation, we will now substitute the known values.

1.33v−1−40cm=1.33−1−20cmv=32.05cm

We know that the magnification ratio can be expressed as vu=Hh.

H denotes the height of the created image.

We'll now swap the given and obtained values.

⇒32.05cm divide by 40cm=H divide by 1cm

⇒H=0.6cm

As a result, the best choice is (B).

Further information: The rules of reflection apply to reflection from a concave mirror. The normal to the point of incidence is drawn along the radius of the mirror, that is, by connecting the point of incidence to the centre of curvature.

The development of an image in a concave mirror is mostly determined by the distance between the object and the mirror. The concave mirror produces both real and virtual images.  A virtual and magnified picture is generated when the object is placed very close to the mirror.

The complete question is -

Find the size of the image formed in the situation shown in figure.

photo

A) 0.5 cm

B) 0.6 cm

C) 1.2 cm

D) 1 cm

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answer:52

Explanation: add 50+0.20=52

The equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.

What is capacitor ?

A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by a non-conductive material, called a dielectric. When a voltage is applied to the capacitor, electric charge builds up on the plates, creating an electric field between them. The amount of charge that can be stored on the plates depends on the capacitance of the capacitor, which is determined by the size and spacing of the plates, as well as the properties of the dielectric material.

When capacitors are in series, their effective capacitance is given by:

1/C_series = 1/C_1 + 1/C_2 + ...

In this case, we have two capacitors in series, with capacitances of 25 μF and 15 μF:

1/C_series = 1/25μF + 1/15μF

1/C_series = (15 + 25)/(1525μF²)

1/C_series = 40/(375*μF²)

C_series = 375*μF²/40

C_series = 9.375 μF

Therefore, the equivalent capacitance of this combination is 9.375 μF, or 9.375 × 10⁻⁶ F in scientific notation.

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Answer:

which on a is the question

w=225000 J  

E=225000 J  

P=9000 W  

P=22500 W

Ew=Fd=E  

P=E/t

Answer:

Pressure is the perpendicular force applied per unit area.

Answer:

Explanation:

The voltage across the inductor VL = IXL

I is the total current flowing in the circuit and XL is the inductive reactance.

First we need to get the current flowing in the circuit.

From the expression above;

I = VL/XL

Since XL = 2πfL

I = VL/ 2πfL

Given VL = 2.8V, frequancy f = 100Hz and inductance L = 0.049-H

I = 2.8/2π*100*0.049

I = 2.8/30.79

I = 0.091A

Also;

Vrms = VL + VR

VR is the voltage across the resistor.

VR = Vrms - VL

VR = 7.9 - 2.8

VR = 5.1V

Then we can calculate the resistance of the resistor

According to ohms law VR = IR

Since the inductance and resistance ar connected in series, the same current will flow through them.

R = VR/I

R = 5.1/0.091

R = 56.04 ohms

Hence the resistance of the resistor in this circuit is 56.04 ohms

The time it will take for the plane to speed 40m/s is 12.9s.

Acceleration in physics is the change of velocity with respect to time (can include deceleration or changing direction).

The time it will take for a moving body to accelerate 40m/s can be calculated using the following expression:

v = u + at

Where;

40 = 0 + 3.1t

40 = 3.1t

t = 12.9s

Therefore, 12.9s is the time it will take for the plane to speed.

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Answer:

It will take approximately 8.88 seconds for the payload to reach the surface of the asteroid.

Explanation:

The payload will fall to the surface of the asteroid at a constant acceleration of 0.45 m/s2 due to the gravitational force acting on it. The velocity of the payload at any time can be calculated using the following equation:

v = at

Where v is the velocity, a is the acceleration, and t is the time elapsed.

To find the time it takes for the payload to reach the surface, we can use the following equation:

d = vt + 0.5at^2

Where d is the distance traveled and t is the time elapsed.

We can rearrange this equation to solve for t:

t = (-v + sqrt(v^2 + 2ad)) / a

Plugging in the values given in the problem, we get:

t = (-0 + sqrt(0^2 + 2 * 0.45 * -600)) / 0.45

t = 8.88 seconds

Therefore, it will take approximately 8.88 seconds for the payload to reach the surface of the asteroid.

If the dog walked at a constant speed the whole way, the graph of the dog's position versus time would be a straight line. This is because the dog's velocity (which is the derivative of position with respect to time) would be constant, and the acceleration (which is the derivative of velocity with respect to time) would be zero.

A straight line on a position-time graph indicates that the object is moving at a constant velocity. The slope of the line would be equal to the velocity of the dog.

If the graph is a horizontal line, it would indicate that the dog is at rest. If the line slopes upward, the dog is moving in the positive direction (for example, to the right in a position-time graph), and if the line slopes downward, the dog is moving in the negative direction.

In all, A constant speed means a constant velocity and the line is a straight line with a particular slope.

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