What em wave is used to see black holes with the chandra observatory?.

The  distance from Earth to the sun is approximately 1.5 x 10^8 kilometers.

To convert miles to kilometers, we can use the conversion factor 1 mile = 1.609344 kilometers.

So, to find the distance from Earth to the sun in kilometers, we can multiply the given distance in miles by the conversion factor:

d (km) = 9.3 x 10^7 miles x 1.609344 km/mile
d (km) = 1.496 x 10^8 km

Therefore, the distance from Earth to the sun is approximately 1.5 x 10^8 kilometers.

The closest answer choice is A) 1.5 x 10^8 km, which is the correct answer.

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To find the horizontal distance between the base of the ladder and the wall, we need to use trigonometry. The horizontal distance is the adjacent side of the triangle formed by the ladder, the wall, and the ground. The ladder is the hypotenuse of the triangle, and the angle formed between the ladder and the ground is 74 degrees.

We can use the cosine function to find the adjacent side:

cos(74) = adjacent / 30

adjacent ≈ 8.27 feet

Therefore, the horizontal distance between the base of the ladder and the wall is approximately  feet. Rounded to the nearest hundredth of a foot, the answer is 8.27 feet.

To find the horizontal distance between the base of the ladder and the wall, we can use the trigonometric function cosine. Given that Kylie leans a 30-foot ladder against a wall, forming an angle of 74° with the ground, we can apply the cosine function as follows:

Step 1: Identify the known values:
- Adjacent side (the horizontal distance) = x
- Hypotenuse (the ladder) = 30 feet
- Angle between the ground and the ladder = 74°

Step 2: Apply the cosine function:
cos(74°) = adjacent side (x) / hypotenuse (30 feet)

Step 3: Solve for x:
x = 30 feet * cos(74°)

Step 4: Calculate the value of x:
x ≈ 30 * 0.2756 ≈ 8.27 feet (rounded to the nearest hundredth of a foot)

So, the horizontal distance between the base of the ladder and the wall is approximately 8.27 feet.

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Answer:

to calculate power of heater in w

In general, the power required by electrical heating is calculated in watts. Wattage: Multiply the area in feet by 10. For a room 20 feet by 20 feet, we obtain 400 sq. ft., multiplied by 10 to give 4000 watts

Answer:

240 watt heater

Explanation:

Just look at only the L side of the graph

   the liquid is heated from - 20 to 40 = 60 C

      so the J of heat required =  .8kg  *  1000 j /kg-C * 60 C = 48 000 J

            this heat is put into the system over 200 seconds

                 48000 J / 200 seconds = 240 watts

Explanation:

the question is not clear

A.1.2°C

The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy.

To find internal energy, you have to add the heat added in the system and work done in the system because the work done is not lost but rather it is added in the system.

Step 1

a)let

to add the energy it must have the same measure unit, so let's convert calories into Julies

remember that

b) now, replace in the formula

now, we have the change of internal energy

Step 2

now, let's find the change in temperature

Use the calorimetry formula.

where m is the mass, Q = heat energy, c = specific heat capacity, and ∆T = change in temperature

a)

let

now,

so, the answer is

A.1.2°C

Addition of vectors is done by adding the components of the vectors

The total speed of the fan  is approximately 9.43 m/s,

Direction of total wind 58° counterclockwise from the positive x-axis

The reason the value is correct is as follows:

The given parameters are:

The direction at which the fan blowing at 5 m/s is blowing = Easterly

The direction in which the fan blowing 8 m/s is blowing = Northerly

The total speed of the van, |v| ≈ 9.43 m/s

Required:

To find the total wind speed of the fans

Solution:

Taken the easterly direction as the ith component, and the northerly direction as the jth component,  the vector representing the speed of the fan is presented as follows

v = 5·i + 8·j

The magnitude of the total wind speed of the fan, |v| = √(5² + 8²) = √(89) ≈ 9.43

The total wind speed of the fan , |v| ≈ 9.43 m/s

The direction of the total speed with respect to the x-axis, θ, is given as follows;

θ = arctan(8/5) ≈ 58°

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The given statement "The horizontal velocity of a projectile changes by 9.8 m/s each second. A projectile with a horizontal component of motion will have a horizontal component of acceleration." is true.

The horizontal velocity of a projectile remains constant unless acted upon by an external force in the horizontal direction. In the absence of such forces, the horizontal velocity remains unchanged. Therefore, it does not change by 9.8 m/s each second.

However, the vertical velocity of a projectile does change due to the force of gravity acting vertically downward. The acceleration due to gravity is approximately 9.8 m/s² (ignoring air resistance).

This means that the vertical velocity of a projectile changes by 9.8 m/s every second. The vertical component of motion experiences a constant acceleration of 9.8 m/s².

On the other hand, the horizontal component of motion remains unaffected by gravity. It continues at a constant velocity in the absence of horizontal forces.

Therefore, while the vertical component of a projectile's motion experiences acceleration due to gravity, the horizontal component does not experience any acceleration.

So, the given statement is true.

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From conductance formula, the potential value, V and current, I for a circuit with conductance, G = 0.05 S and power, 0.25 W are equal to 2.235 Volts and 0.11 Amperes.

Conductance is an expression with which electric current flows through materials like metals and nonmetals. It is the inverse of resistance, in circuit so, \(G = \frac{1}{R} \) , where R --> resistance

Conductance is measured in units of Siemens or mho-s and an uppercase letter G symbolizes conductance. We have a circuit diagram present in attached figure where conductance, G =0.05 S

Power, P = 0.25 W

We have to determine the value of V and Is. Using the above formula, \(G = \frac{1}{R} \)

=>\( R = \frac{1}{0.05}\)ohm

Also, power is equals to ratio of square of potential, V to resistance R, i.e., \(P = \frac{V²}{R}\)

Substitute all known values in above formula, V² = PR

=>\(V² = \frac{0.25}{0.05} \)

= 5

=> V = 2.235 V

So, required value is 2.235 Volts. Now, the current \(I_s = \frac{ V}{R} \)( from ohm's law)

Substitute all known values in this formula, Iₛ = VG

= 0.05 × 2.235

= 0.11 A

Hence, required value is 0.11 ampere.

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Complete question:

if G = 0.05 S and the power being delivered to the conductance is P= 0.25 W, determine V and Is. See the attached figure.

We know that the current I(t) flowing through a capacitor is related to the voltage V(t) across the capacitor by the equation:

\(I(t) = C * dV(t)/dt\)

where C is the capacitance of the capacitor. Rearranging this equation, we can solve for dV(t)/dt:

dV(t)/dt = I(t) / C

Substituting the given current, we get:

dV(t)/dt = (4 sin (4t) A) / (5 F)

Integrating both sides with respect to t, we get:

V(t) = - (4/5) cos (4t) V + K

where K is an integration constant that we can determine from the initial condition V(0) = 3 V:

V(0) = - (4/5) cos (0) V + K

K = 3 V + (4/5) V

K = 4.6 V

Substituting K back into the equation, we get:

V(t) = - (4/5) cos (4t) V + 4.6 V

Therefore, the voltage across the capacitor is given by:

v(t) = 4.6 V - (4/5) cos (4t) V

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Ionising radiation such as alpha and beta particles or gamma rays are detected using the Geiger-Müller (GM) tube. The radiation enters the tube through a very thin window at one end.

A radioisotope used for diagnostics must generate enough gamma rays to escape from the body and have a short enough half-life to decay away shortly after imaging is concluded. Tc-99 is the most often used radioisotope in medicine, accounting for approximately 80% of all nuclear medicine treatments.

Nuclear imaging is used to study the function of organs and tissues. During the operation, a trace amount of a radioactive chemical is used to aid in the examination. Body tissue absorbs the radioactive substance, known as a radionuclide (radiopharmaceutical or radioactive tracer).

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The DOH issues advisories from June to November due to increased health risks associated with the rainy season, disease outbreaks, and the need for preparedness and public education.

The Department of Health (DOH) issues public health advisories during the months of June to November for several reasons related to public health concerns specific to that time period. Here are some possible reasons:

1. Rainy Season: In many regions, June to November corresponds to the rainy season or monsoon season. During this time, there is an increase in rainfall, which can lead to various health risks such as waterborne diseases, flooding, and increased vector population (mosquitoes, rats, etc.). The DOH issues advisories to raise awareness and provide preventive measures against these risks.

2. Disease Outbreaks: Certain diseases are more prevalent or have a higher likelihood of outbreaks during specific months. For example, dengue fever is commonly associated with the rainy season due to the increased breeding of mosquitoes in stagnant water. Leptospirosis, which is transmitted through contaminated water, is also more common during this period. The DOH issues advisories to inform the public about these diseases and how to prevent them.

3. Preparedness and Response: The DOH aims to promote preparedness and timely response to public health emergencies. By issuing advisories in advance, they can inform the public about potential health risks, preventive measures, and necessary actions to take. This helps individuals and communities be better prepared and able to respond effectively to health threats.

4. Awareness and Education: Public health advisories serve as a means to educate and raise awareness about health-related issues. The DOH uses these opportunities to disseminate information on proper hygiene practices, sanitation, vaccination, and other preventive measures. By targeting specific months, they can address the specific health concerns associated with that time of the year.

It's important to note that the specific reasons for issuing advisories during these months may vary depending on the region and prevailing health risks. The DOH assesses local epidemiological data and collaborates with other agencies to determine the appropriate timing and content of the advisories.

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Energy from the battery is changed into electrical energy, which is then used to power the fan and create kinetic energy as the blades spin.

In an electric circuit, energy is changed from one form to another. When a battery is connected to a fan, energy from the battery is changed into electrical energy. This electrical energy is then used to power the fan and create kinetic energy, or energy of motion, as the blades spin.

The energy from the battery is stored in the form of chemical energy. This chemical energy is then changed into electrical energy, which is the energy required to power the fan. This electrical energy passes through the fan, causing the blades to spin. As the blades spin, kinetic energy is generated in the form of the movement of the blades.

The energy in the electric circuit is constantly changing from one form to another. The battery converts chemical energy into electrical energy, and the fan converts electrical energy into kinetic energy. This is the process of energy transformation, which allows us to convert energy from one form to another in order to use it to power appliances.

The electric circuit created by the students is a simple way to illustrate this process of energy transformation. The battery provides the initial source of energy, which is then converted into electrical energy. This electrical energy is then used to power the fan and create kinetic energy. This kinetic energy is then used to move the fan

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Answer:

Energy from the battery is changed into electrical energy, which is then used to power the fan and create kinetic energy as the blades spin.

Connection of an electric circuit

Explanation:

The statements true in regards to heat is 3. Heat is a form of energy, can be reflected by a mirror, and cannot pass through a vacuum.

Heat is a form of energy. Heat is the transfer of thermal energy from one object to another. Thermal energy is the energy of motion of the particles in an object. Heat can be reflected by a mirror. Heat is a form of electromagnetic radiation, and electromagnetic radiation can be reflected by mirrors.

Heat cannot pass through a vacuum. Heat is a form of electromagnetic radiation, and electromagnetic radiation cannot pass through a vacuum. Heat is not an electromagnetic radiation. It is a form of energy that is transferred from one object to another because of a difference in temperature.

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Complete question:

Which of the following statements are true regarding heat?

(a) Heat is a form of energy

(b) Heat can be reflected by mirror

(c) Heat is an electromagnetic radiation

(d) Heat can pass through vacuum

Select the correct answer from the codes given below :

1. 1, 2 and 3

2. 2, 3 and 4

3. 1, 2 and 4

4. 1, 3 and 4

When you park and your vehicle is facing uphill and there is no curb, your wheels should be turned so that they point towards the side of the road .

The use of physical precautions (eg bollards and barriers) is recommended to prevent vehicles crossing into walking areas, while “drive-through” parking is advised to reduce the need for reversing, combined with a one-way traffic flow system are called car parking safety rules .

If your vehicle rolls backward since , it is on a hill and it can roll back ,  you don’t want it rolling into Traffic. So you would turn your wheels towards the road so if the car rolls back it will go onto the ditch, or onto someone’s lawn and not into moving traffic.

If it ended up getting into the traffic it will be more dangerous for your car as well as for the other cars as it will increase the possibility of accident and cars can get damaged and you also will probably be held liable for the damage to the other car as well, so it is better if it rolls off of the roadway .

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Answer:17.24 m/s

Explanation:

Colors seen on some TV screens result from color additive mixing, which involves combining the primary colors of red, green, and blue (RGB) in varying intensities to produce a full range of colors.

By adjusting the amount of each primary color that is displayed, different hues and shades can be created. This process is also known as the RGB color model.

Each pixel on the TV screen is made up of three subpixels, one for each primary color, which are illuminated to create the desired color.

This allows for the creation of millions of colors using only three primary colors.

Other color models, such as the CMYK model used in printing, use subtractive mixing to achieve the desired color.

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Answer:

the angular speed of the stone at the moment of release is 15.05 rad/s

Explanation:

Given the data in the question;

The point of release ( height ) h = 25.6 m

the time of the fall of the stone will be;

⇒√( 2h/g )

we know that g = 9.81 m/s

so we substitute

t = √( (2 × 25.6 m) / 9.81 m/s )

t = √( 51.2 / 9.81 m/s )

t = √( 5.219164 s )

t = 2.285 s

Now, let v represent velocity at the time of release

them v × t ~ v × 2.285 s is the horizontal distance traveled.

Given that; The horizontal distance of point X from the base of the cliff (directly beneath the point of release) is 34.4 times the radius of the circle.

so

v × 2.285 = 34.4 × radius

Now, if the angular speed is ω then velocity at the time of release will be;

v = radius × ω

hence;

(radius × ω)  × 2.285 = 34.4 × radius

radius cancels each other out and we have;

ω  × 2.285 = 34.4

ω = 34.4 / 2.285

ω = 15.05 rad/s

Therefore, the angular speed of the stone at the moment of release is 15.05 rad/s

Charged particles are fundamental to the behavior of electric currents, electric circuits, and resistance. An electric current is the flow of charged particles, typically electrons, through a conductor.

The flow of charged particles generates an electric field that induces a potential difference, or voltage, across the conductor.Electric circuits are constructed by connecting conductors and electrical components, such as resistors, capacitors, and inductors, in a specific configuration. The arrangement of the components determines how the current flows through the circuit.

The flow of current through the circuit depends on the resistance offered by the components in the circuit and the potential difference across the circuit.Resistance is the property of a conductor that opposes the flow of current. The resistance of a conductor is proportional to the number of charged particles in the conductor, the length of the conductor, and the cross-sectional area of the conductor. The resistance can also be affected by the temperature of the conductor and its material properties.

In summary, charged particles are responsible for generating electric currents that flow through electrical circuits. The behavior of the currents is determined by the arrangement of the components in the circuit and the resistance offered by the conductors and components. Resistance is a fundamental property of a conductor that opposes the flow of charged particles and can be affected by various factors.

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Here the focal length of the convex mirror as -12 cm, a light bulb with a diameter of 6 cm is placed 60 cm from the mirror. Hence, the image distance is -60 cm, and the image height is 6 cm.

To find the image distance and height, we will use the mirror formula for a convex mirror, which is given as follows;1/f = 1/v + 1/u. Where, f = focal length of the convex mirror;

v = the image distance;

u = the object distance

If the object distance is positive, it means the object is placed in front of the mirror, and if it is negative, it means the object is placed behind the mirror. The focal length of a convex mirror is always negative, as given above.

Therefore, u = -60 cm and f = -12 cm.

Plugging in the values in the mirror formula, we get:1/-12 = 1/v + 1/-60=> -5/60 = 1/v - (1/60) => -5/60 = (60 - v)/60=> v = -300/5= -60 cm

The image distance is -60 cm, which means the image is virtual and erect. The negative sign indicates that the image is formed behind the mirror.

To find the image height, we use the magnification formula:

m = -v/u= -(-60)/(-60)= 1

The magnification is 1, which means the image is of the same size as the object. The height of the light bulb is 6 cm, so the height of the image will also be 6 cm.

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Answer:

I will answer before the bot in comments

Answer:

Suppose at time t1 = zero and v1 = 50 MPH

                    time t2 = 10 sec and v2 = 10 MPH

Change in speed   =  (v2 - v1) / (t2 - t1) = (10 - 50) MPH / (10 - 0) sec

Change in speed = -40 MPH / 10 sec = - 4 MPH / sec

If you specify the velocity as always East then

change in velocity = - 4 MPH East

Had the particle finished by moving in the Westerly direction  then

Change in velocity = (-10 - 50) MPH / 10 sec = -60 / 10 MPH = -60 MPH East

Where West was the positive direction

Initially v1 was 50 East and v2 was -10 East with a difference of 60 MPH

In order to begin moving a Mass (Accelaration) will solve for the force required to move the skateboard. Mass(9.8) will give you the force needed to move the skateboard originally

Acceleration can be defined as the rate of change of velocity with respect to time, is a vector quantity associated with both magnitude and direction.

Acceleration can be up two types such as Uniform and Non-uniform acceleration,  in a circle where speed remains constant but  the direction is changing followed by velocity changes, and the body is said to be accelerated.

The average acceleration can be defined as the total change in velocity in the given interval period of time means the total time taken for the change. For a given interval of time, it is represented as ā.

Instantaneous acceleration can be defined as the ratio of change in velocity in a given time interval such that the time interval goes to zero.

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The voltage now across the capacitor is 5.0 V, which is obtained by dividing the initial voltage by the dielectric constant of 4.0. Option A is correct.

The capacitance of a parallel-plate capacitor is given by the equation C = εA/d, where ε is the permittivity of the material between the plates, A is the area of the plates, and d is the distance between the plates. In this case, we are given that the capacitance of the capacitor is 10 mF, or 10 × 10^-6 F.

When the capacitor is charged with a 20 V power supply, the charge stored on the plates is given by Q = CV, where V is the voltage across the capacitor. Solving for V, we get:

When the dielectric material of dielectric constant 4.0 is inserted between the plates, the capacitance of the capacitor increases by a factor of 4.0, since C' = κC = 4C. Therefore, the new capacitance is 40 mF.

Since the charge on the plates remains constant, the new voltage can be found using V' = Q/C' = Q/(κC) = V/κ = 20 V/4.0 = 5.0 V.

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Answer:

More horsepower = more power use.

Explanation:

Horsepower is just a measure of power, similar to Watts (1 horsepower = 745.7 W). So, as a simple example, a lightbulb that uses 1 hp will have a higher power use than a lightbulb that uses 2 hp.

The cohesive forces between liquid molecules generate the surface tension phenomena.

In physics, cohesion is defined as the intermolecular attractive force operating between two adjacent sections of a material, most notably a solid or liquid. This is the force that keeps stuff together. Intermolecular forces also exist between two distinct substances that come into contact, a process known as adhesion. Water characteristics cohesion and adhesion explain how water molecules interact with one another. as well as how water molecules interact with other substances such as leaves or even you. Water tends to stick to itself, which is what cohesion means. Water tends to attach to other things, which is what adhesion means. Cohesion is the act of sticking together. If your group of pals goes to the lunchroom as a unit and sits together, you're displaying good cohesiveness.

Here,

The phenomenon known as surface tension is caused by the cohesive forces between liquid molecules.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

volume = final volume of water - initial volume of water

volume = 13.5 - 10.5 = 3 mL

From the question we have

\(density = \frac{8.1}{3} \\ \)

We have the final answer as

Hope this helps you

this is in order.

LANDFILL

GROUNDWATER

PESTICIDE

FERTILIZER

HAZARDOUS WASTE

SEPTIC SYSTEM

SEEPAGE

Answer:

Horsehair, cotton, or linen

Explanation: