The spectrum of a star shows an equivalent set of dark absorption lines to those of the Sun, but with one exception: Every line appears at a slightly shorter wavelength; each is blueshifted. What conclusion can be drawn from this observation

If an electric field of 1.5 kv and a magnetic field of 0.425 t act on a moving electron to produce no net force. if the fields are perpendicular to each other then the electron's speed is 3529.4 m/s.

When an electric field and magnetic field act on a charged particle, the net force on the particle is given by the Lorentz force equation:

F = q(E + v x B)

where F is the net force, q is the charge of the particle, E is the electric field, v is the velocity of the particle, and B is the magnetic field.

In this problem, we are told that the net force on the electron is zero, so we can set F = 0:

0 = q(E + v x B)

Since the electric and magnetic fields are perpendicular to each other, the cross product v x B is a vector perpendicular to both v and B, and therefore is parallel to the electric field E. Therefore, we can simplify the equation to:

0 = qE

Solving for the velocity v, we get:

v = -E/B

Plugging in the values for the electric and magnetic fields, we get:

v = -(1.5 kV)/(0.425 T) = -3529.4 m/s

The negative sign indicates that the velocity of the electron is in the opposite direction to the electric field. Therefore, the electron's speed is 3529.4 m/s.

Learn more about the electric field:

brainly.com/question/8971780

#SPJ4

a) Given: The tension in the string, T = 2.50 N The separation between the balls, l = 2mLet the charge on the ball A be q, and that on the ball B be 2q. So, we have to find the value of q. So, the force of electrostatic repulsion between A and B can be calculated by Coulomb's law as:

\($$F = \frac{1}{4\pi \epsilon _0}\frac{q(2q)}{l^2} = \frac{q^2}{2\pi \ epsilon _0l^2}$$\)  The net force on the system can be obtained by taking the vector sum of the electrostatic force and the tension in the string. Since the balls are floating at rest, the net force on them must be zero.

So, we can write:$$T + F = 0$$$$\ Right arrow \frac{q^2}{2\pi \epsilon _0l^2} = T$$$$\Right arrow q = \sqrt{\frac{2\pi \epsilon _0l^2 T}{}}$$Substituting the given values, we get:$$q = \sqrt{\frac{2\times 3.14 \times 8.85\times 10^{-12}\times 2^2\times 2.5}{}}$$$$\Right arrow

q = 1.18 \times 10^{-8} C$$   Therefore, the magnitude of q is 1.18 × 10⁻⁸ C.b) The two balls A and B carry like charges, so there will be an electrostatic force of repulsion between them.

As time passes, the charge on the balls does not change, so the tension and the separation between the balls also remain constant. Therefore, the system will remain in the same state of equilibrium and nothing else will happen to the system as time passes.

To know more about electrostatic visit:

https://brainly.com/question/16489391

#SPJ11

Answer:

1. 12 V

2a. R₁ = 4 Ω

2b. V₁ = 4 V

3a. A = 1.5 A

3b. R₂ = 4 Ω

4. Diagram is not complete

Explanation:

1. Determination of V

Current (I) = 2 A

Resistor (R) = 6 Ω

Voltage (V) =?

V = IR

V = 2 × 6

V = 12 V

2. We'll begin by calculating the equivalent resistance. This can be obtained as follow:

Voltage (V) = 12 V

Current (I) = 1 A

Equivalent resistance (R) =?

V = IR

12 = 1 × R

R = 12 Ω

a. Determination of R₁

Equivalent resistance (R) = 12 Ω

Resistor 2 (R₂) = 8 Ω

Resistor 1 (R₁) =?

R = R₁ + R₂ (series arrangement)

12 = R₁ + 8

Collect like terms

12 – 8 =

4 = R₁

R₁ = 4 Ω

b. Determination of V₁

Current (I) = 1 A

Resistor 1 (R₁) = 4 Ω

Voltage 1 (V₁) =?

V₁ = IR₁

V₁ = 1 × 4

V₁ = 4 V

3a. Determination of the current.

Since the connections are in series arrangement, the same current will flow through each resistor. Thus, the ammeter reading can be obtained as follow:

Resistor 1 (R₁) = 4 Ω

Voltage 1 (V₁) = 6 V

Current (I) =?

V₁ = IR₁

6 = 4 × I

Divide both side by 4

I = 6 / 4

I = 1.5 A

Thus, the ammeter (A) reading is 1.5 A

b. Determination of R₂

We'll begin by calculating the voltage cross R₂. This can be obtained as follow:

Total voltage (V) = 12 V

Voltage 1 (V₁) = 6 V

Voltage 2 (V₂) =?

V = V₁ + V₂ (series arrangement)

12 = 6 + V₂

Collect like terms

12 – 6 = V₂

6 = V₂

V₂ = 6 V

Finally, we shall determine R₂. This can be obtained as follow:

Voltage 2 (V₂) = 6 V

Current (I) = 1.5 A

Resistor 2 (R₂) =?

V₂ = IR₂

6 = 1.5 × R₂

Divide both side by 1.5

R₂ = 6 / 1.5

R₂ = 4 Ω

4. The diagram is not complete

The forces that act on the block that is at rest on the slope are:

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

A force that holds an object at rest is called static friction. The definition of static friction is: The resistance people feel when they attempt to move a stationary object across a surface without actually causing any relative motion between their body and the surface they are moving the object across.

A contact force is a normal force. A normal force cannot be applied to two surfaces that are not in contact.

Read more on force here:https://brainly.com/question/388851

#SPJ1

question

A block is resting on an slope. (Figure 3) Which of the following forces act on the block?

Check all that apply.

weight

static friction

normal force

kinetic friction

When a fragment of bone containing carbon-14 isotopes of the element carbon is discovered during an archaeological dig, and it is estimated to be approximately 23,000 years old, one can calculate the proportion of the carbon-14 isotopes that remains.

For such more question on Proportion  

https://brainly.com/question/1496357

#SPJ8

Scientists can obtain information about water levels, temperatures, and ocean salinity from fossils that provide evidence of changes in Earth's climate over time.

By examining the types of organisms found in different layers of rock, scientists can determine what the climate was like during that time period. For example, the presence of coral reefs in rocks that are now located in a desert environment suggests that the area was once covered by water.

Similarly, the presence of fossils of cold-water organisms in rocks that are now located in a warm climate suggests that the temperature has changed over time. Scientists can also use fossils to track the movement of continents and understand the causes of mass extinctions, which can be linked to climate change. Overall, fossils provide valuable insights into the history of Earth's climate and how it has evolved over millions of years.

More on fossils: https://brainly.com/question/31419516

#SPJ11

Answer:

f=1.92 cm

If ans is correct reply for explanation.

The typical focal length formula looks as follows: 1/Focal length = 1/Image distance + 1/Object distance , where: Image distance and Object distance are given in mm.

1/f = 1/u + 1/v

1/f = 1/133 + 1/22.5

    = 0.007 + 0.044

    = 0.0514 mm

"The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light."

Know more about focal length here

https://brainly.com/question/16188698

#SPJ2

Answer:

A contact force is the push/pull that changes the velocity of a mass by physically touching it.

Example: muscular force, friction, or air resistance.

A non-contact force does the same without touching it.

Example: electrostatic force, gravity, or magnetism.

Answer:

The mass has gained a height of 5 meters.

Explanation:

To calculate the height gained by a 2kg mass when 100J of gravitational energy is transferred to it, we can use the equation:Height (h) = Gravitational Potential Energy (GPE) / Weight (w)where GPE = mgh (mass x acceleration due to gravity x height)Therefore,h = (100 J) / (2 kg x 10 N/kg)h = 5 metersThe mass has gained a height of 5 meters.

The final velocity of Skater 1 is 0.58 m/s to the left.Given below is the solution to the asked problem.Skater 1 has a mass of 105.0 kg and a velocity of 2.0 m/s to the left.

He collides with Skater 2, who has a mass 71.0 kg and a velocity of 5.0 m/s to the right. After they collide, Skater 2 has a velocity of 3.4 m/s to the left.

We are required to find the final velocity of Skater 1. Let v be the final velocity of Skater 1. Then applying conservation of momentum formula before and after the collision, we have Mass of Skater 1 × Velocity of Skater 1 before collision + Mass of Skater 2 × Velocity of Skater 2 before collision

= Mass of Skater 1 × Velocity of Skater 1 after collision + Mass of Skater 2 × Velocity of Skater 2 after

collision105 × 2.0 + 71 × 5.0

= 105 × v + 71 × 3.4Solving the above equation for v, we have:

v = [105 × 2.0 + 71 × 5.0 - 71 × 3.4] / 105v

= 0.5809 ≈ 0.58 m/s

Therefore, the final velocity of Skater 1 is 0.58 m/s to the left.

to know more about velocity visit :

brainly.com/question/17127206

#SPJ11

Answer:

wavelength and frequency

Explanation:

wavelength is the distance between waves while frequency is the number of times in which the wave occurs.

Answer:1200

Explanation:

F=ma =m(Vf-Vi)/t

F=120(25-5)/2 =1200N

Answer:

\(f = m \frac{v1 - v2}{t} \\ = 120 \times \frac{25 - 5}{2} \\ = 120 \times 10 \\ = 1200N \\ thank \: you\)

What is permeability? b. pore spaces that are interconnected to allow the movement of air or water. Permeability is a measure of the ability of a material to allow the flow of fluids through it.

It is a measure of the interconnectedness of the pore spaces in a material. Materials with high permeability allow fluids to flow through them more easily than materials with low permeability.

What is the capillary fringe? b. material above the water table that is moistened by the rise of capillary water against gravity. The capillary fringe is the zone of soil or rock that is saturated with water due to capillary action.

Capillary action is the ability of water to move upwards against gravity through the narrow spaces between soil particles. The capillary fringe is typically a few centimeters thick, but it can be thicker in some soils.

Permeability is a measure of the ability of a material to allow the flow of fluids through it.

The capillary fringe is the zone of soil or rock that is saturated with water due to capillary action.

Permeability is important in a variety of applications, including groundwater recharge, well design, and the construction of dams and levees. The capillary fringe is important for plant growth, as it provides water to plants that are not located directly above the water table.

To learn more about permeability click here: brainly.com/question/32006333

#SPJ11

Assuming a flat ground, and  football thrown or dropped from the same height, the horizontally-thrown ball will hit the ground with the same vertical velocity as the dropped ball, but it will have most of its initial horizontal velocity, too. A simple vector addition, guarantees that that the horizontally-thrown ball will have a larger total velocity than the dropped ball.

What is Velocity.

Velocity is the directional velocity of a moving object as an indicator of the rate of change of position observed from a particular frame of reference and measured at a particular time standard.

Therefore, A simple vector addition, guarantees that that the horizontally-thrown ball will have a larger total velocity than the dropped ball.

To learn more about velocity refer the given link:-

https://brainly.com/question/17174392

#SPJ9

Answer:

waking up,eat,sleep

Explanation:

notice how i didn't say math :)

Answer:

The maximum voltage that can be applied without damaging the resistor is 4.85 V

Explanation:

Electric Power in a Resistor

Given a resistor or resistance R connected to a circuit of voltage V carrying a current I. The relation between these three magnitudes is given by Ohm's Law:

V = R.I

The dissipated power P of a resistor can be calculated by the following equation, known as Joule's first law:

\(P = I^2.R\)

Solving the first equation for I:

\(\displaystyle I=\frac{V}{R}\)

Substituting in the second equation:

\(\displaystyle P=\frac{V^2}{R^2}.R\)

Simplifying:

\(\displaystyle P=\frac{V^2}{R}\)

Solving for V:

\(V=\sqrt{P.R}\)

The resistor has a resistance of R=47Ω and can hold a maximum power of P=0.5 W, thus the maximum voltage is:

\(V=\sqrt{0.5\cdot 47}\)

\(V=\sqrt{23.5}\)

V = 4.85 V

The maximum voltage that can be applied without damaging the resistor is 4.85 V

Answer:

x=2

Explanation:

-20 = -10x

divide by 10

-x = -2

cancel the -s

Explanation:

3 atoms are in the compound

Answer:

588 J

Explanation:

P.E = mgh

      = 6 * 9.8 * 10

     = 588 J

if g value is rounded and taken as 10 then answer is 600 J.

The magnification of the image of Julitha Barber produced by the converging mirror is 0.0979

To find the magnification of the image, we need to use the formula:

magnification = -v/u,

where v is the distance of the image from the mirror, and u is the distance of the object from the mirror. Since the object is Julitha Barber standing at a distance of 553 m, we can take u as -553 m (negative because the object is on the same side as the mirror).
Now, we need to find the distance of the image from the mirror (v). For this, we can use the mirror formula: 1/v + 1/u = 1/f, where f is the focal length of the mirror, and is equal to half the radius of curvature (f = R/2). So, in this case, f = 1.20 × 102 m/2 = 60 m. Substituting the values in the formula, we get:
1/v + 1/-553 = 1/60
Solving for v, we get v = -54.12 m. (Note that the negative sign indicates that the image is virtual and upright.)
Now, we can use the magnification formula to find the magnification of the image:
magnification = -v/u = -(-55.6)/553 = 0.0979  (rounded to one decimal place)
Therefore, the magnification of the image of Julitha Barber produced by the converging mirror is 0.0.0979. This means that the image is 10 times smaller than the actual object and is virtual and upright.

for more such question on magnification

https://brainly.com/question/29306986

#SPJ11

Given, the mass of the sample = 433 kg. We need to find the mass of the sample in milligrams (mg).

1 kilogram (kg) = 1,000,000 milligrams (mg)

Therefore,

Mass of the sample in mg = 433 × 1,000,000 mg = 4.33 × 10^8 mg.Hence, the answer is an option (e) 4.33 × 10^8 mg.

The conversion factor between kilograms and milligrams is 1 kg = 1,000,000 mg. Therefore, to convert the mass of the sample from kilograms to milligrams, we simply multiply it by 1,000,000.

433 kg × 1,000,000 mg/kg = 433,000,000 mg

To express the result in scientific notation, we write it as 4.33 × 10^8 mg.

Option (e) is the correct answer.

Learn more about scientific notation here:-brainly.com/question/16936662

#SPJ11

The enumerated powers of Congress are the powers specifically granted to the legislative branch of the United States government by the Constitution. Enumerated powers are those powers that are listed explicitly in the Constitution.

The correct examples of enumerated powers of Congress are:

Levying taxes

Declaring war

Coining money

Non - Metals:

Some terms:

★ Malleable: This means that metals can be beaten into thin sheets with hammer.

★ Ductile: This means that metals can be drawn into thin wires.

★ Brittle: This means that non-metal break into pieces on hammering.

★ Sonorous: This means capable of producing a ringing sound.

The electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

To find the electric field strength at a distance 1.20 m on the x-axis, we can use Coulomb's law:

\($$F=k\frac{q_1q_2}{r^2}$$\)

where F is the force between two charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the Coulomb constant.For a single point charge q located at the origin of the x-axis, the electric field E at a distance r is given by:

\($$E=\frac{kq}{r^2}$$\)  where k is the Coulomb constant.

So, let's calculate the electric field due to each charge separately and then add them up:

For the +2.0 C charge at x = 0, the electric field at a distance of 1.20 m is:\($$E_1=\frac{kq_1}{r^2}=\frac{(9\times10^9)(2.0)}{(1.2)^2}N/C$$\)

For the -3.0 C charge at x = 0.40 m, the electric field at a distance of 1.20 m is:

\($$E_2=\frac{kq_2}{r^2}\)

\(=\frac{(9\times10^9)(-3.0)}{(1.20-0.40)^2}N/C$$\)

The negative sign indicates that the direction of the electric field is opposite to that of the positive charge at x = 0.

To find the net electric field, we add the two electric fields\(:$$E_{net}=E_1+E_2$$\)

Substituting the values of E1 and E2:

\($$E_{net}=\frac{(9\times10^9)(2.0)}{(1.2)^2}-\frac{(9\times10^9)(3.0)}{(0.8)^2}N/C$$E\)

net comes out to be -1.5×10⁴ N/C.

Therefore, the electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

Know more about  electric field   here:

https://brainly.com/question/19878202

#SPJ8

It would take approximately 716,943 years for the New Horizons space satellite to travel to Proxima Centauri at its current speed.

To calculate the number of years it would take for the New Horizons space satellite to travel to Proxima Centauri, we need to convert the speed of the satellite to the appropriate units and then use the formula for time:

Distance = Speed × Time

Given:

Distance to Proxima Centauri = 4.3 light years

Speed of New Horizons = 53,000 kilometers per hour

First, we need to convert the speed of New Horizons from kilometers per hour to light years per year. To do this, we'll use the conversion factor:

1 light year ≈ 9.461 × \(10^{12\) kilometers

Speed of New Horizons in light years per year:

Speed in light years per year = (53,000 kilometers per hour) × (1 year / 8766 hours) × (1 light year / 9.461 × \(10^{12\) kilometers)

Speed in light years per year ≈ 0.000006003

Now, we can calculate the time it takes to travel to Proxima Centauri:

Time = Distance / Speed

Time = 4.3 light years / 0.000006003 light years per year

Time ≈ 716,943 years

Learn more about proxima centauri here:

https://brainly.com/question/12829430

#SPJ11

Divergent plate boundaries are where two plates are shifting apart from one another. Rising magma from the core of the Earth at these boundaries erupts, forming a new layer on the lithosphere. Ocean-spreading ridges are submerged mountain ranges that are formed by the majority of divergent plate borders.

A diverging boundary, also referred to as a divergent boundary, is a linear structure that occurs between two tectonic that are moving apart in the field of plate tectonics. It is sometimes referred to as a constructive barrier or an extensional border.

Rifts are initially created by divergent plate boundaries within continents; they later develop into rift valleys. Oceanic plates' mid-oceanic ridges are where the majority of active plate boundary borders are found.

To know more about Divergent Plate Boundary:

https://brainly.com/question/28549411

#SPJ1

Answer:

15 kg

Explanation:

F = m*a

F/a = m

210/14 = 15 kg

Answer:

all of the above

Explanation:

because I know

Answer: all of the above

Explanation:

Each answer - choice has a reasonable relevance when using a website.