Energy in Waves Quick Check1 of 51 of 5 ItemsQuestionX-ray technicians wear protective gear to keep them safe from the X-rays. Why are X-rays dangerous

The ion rocket engine give an acceleration to the space probe of: 0.001 m/s²

To solve this exercise, the formula and procedure to be applied is:

F = m * a

Where:

Information about the problem:

Applying the force formula and isolating the acceleration, we get:

F = m * a

a = F/m

a = 1 N /1000kg

a =  1 kg * m/s² / 1000kg

a = 0.001 m/s²

It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.

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Answer: decrease

Explanation: it does

Answer:

b

Explanation:

Answer:

they transfer energy

Explanation:

4. A scientific theory is an explanation that tells how and why certain things happen. A scientific theory is a carefully thought out explanation that is based on scientific experiments.  It is an amalgamation of facts and hypotheses.

The theories are the most probable explanation of certain events and thus, can be changed and modified based on the evidences collected via observations and scientific experiments.

Both the options a and c are correct. Hence, the correct answer is option d.

5. The units are said to be derived units when they are derived from the seven fundamental units. Among the given options, meter (m), candela (cd), and hertz are the SI units of height, luminous intensity, and frequency while Coulomb (C) is a derived unit of charge.

The correct answer is option b.

6. Conversion factor can be defined as the number which are utilized to change the one set units into another. 1 meter = 100 cm

1 km = 1000m

1 Tbyte = 1Khz

The correct answer is option d.

7. The given arithmetic operation can be solved as follows:

6.201 + 7.4 + 0.68 + 12.0 = 26.281 cm

The correct answer is option a.

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(a) The free body diagram for representing all the forces acting on an object.

(b) The force Mr. Seifert is applying to the box to move it forward to the RIGHT is 105 N.

A free body diagram is a graphical illustration of all the forces acting on an object.

The force applied by Mr Seifert is calculated by applying Newton's second law of motion as follows;

F - Ff = ma

where;

The given parameters include;

mass of the cardboard = 40 kg

force of friction = 25 N

acceleration of the cardboard = 2 m/s²

The force applied by Mr Seifert is calculated as follows;

F = Ff + ma

F = 25 N  +    (40 kg x 2 m/s²)

F = 105 N

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The satellite's gravitational pull on the meteor, measured in magnitude, is 401.4*10^(-11)N.

The spherical aluminium balloon has a mass of M = 80 kg.

The meteor weighs m = 195 kg.

The aluminium balloon is spherical and has a diameter = 27 metres.

The meteor's distance from a satellite's surface is x = 2.6 m

According to Newton's Law of Universal Gravitation, every particle in the cosmos is drawn to every other particle with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance.The answer to the provided question is included as an image.The satellite's gravitational pull on the meteor, measured in magnitude, is 401.4*10^(-11)N.

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Answer:

potential energy

Explanation:

Answer:

A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What is the initial kinetic energy of the bullet? 153.125 J Correct: Your answer is correct.Jan 8, 2020

Explanation:

The urban legend of the car thief is an example of A Cautionary Tale.

A cautionary tale makes reference to a given tale aimed at the warning the person of some type of danger, which is generally used to alert about a given behavior and may be very useful to modify a behavior pattern in children.

Therefore, with this data, we can see that A cautionary tale is based on warning and can help to modify certain behavior in c children depending on the ability to create conscious.

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Yes it is important that the temperature of the surface important to apply a clear coat for G60 Galvanized tubing.

The end of a steel sheet (either hot- or cold-rolled) is sheared and welded to the preceding coil to form one continuous coil.A high-performance tension leveler is used to straighten the strip, resulting in excellent flatness.

The strip is dipped in an alkali bath and brushed for preliminary degreasing, and then undergoes alkaline electrolytic degreasing. This removes impurities on the material surface that could harm the zinc coating. The strip is then dipped in a acidic bath to activate the surface.

The zinc-coated strip is given various chemical treatments according to intended use, including phosphate treatment for excellent paintability, and chromate free special treatment for good corrosion resistance.

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Answer:

everything is perished isn't it?

hope it helps.

Answer:

isn't it is the answer of your question

hope it is helpful to you

The force that is not a pressure or force acting on a TXV (Thermostatic Expansion Valve) diaphragm is the spring.

The diaphragm in a Thermostatic Expansion Valve is typically actuated by different pressures and forces. The head pressure, evaporator pressure, and bulb pressure (sensing bulb) are all pressures that act on the diaphragm, affecting its position and controlling the flow of refrigerant.

However, the spring in the TXV is not considered a pressure or force acting on the diaphragm. The spring's role is to provide a mechanical force that opposes the pressures acting on the diaphragm, helping to regulate the opening and closing of the valve. It helps to maintain the appropriate balance between the pressure forces to achieve the desired control over the refrigerant flow.

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(a) To find the time it takes for the ball to travel the first half of the distance, we can use the equation:
distance = speed × time
Since the initial speed of the ball is given in km/h, we need to convert it to m/s:
113 km/h = 113,000 m/3600 s = 31.4 m/s
The first half of the distance is half of 18.3 m, so it is 9.15 m.
Using the equation, we can rearrange it to solve for time:
time = distance / speed
time = 9.15 m / 31.4 m/s ≈ 0.291 s
Therefore, it takes approximately 0.291 seconds for the ball to travel the first half of the distance.
(b) Since the second half of the distance is the same as the first half (9.15 m), the time it takes for the ball to travel the second half will also be 0.291 seconds.
(c) During the first half of the distance, the ball falls freely due to gravity. The vertical distance it falls can be calculated using the equation for free fall:
distance = 0.5 × g × t^2
where g is the acceleration due to gravity (approximately 9.8 m/s^2) and t is the time (0.291 s).
distance = 0.5 × 9.8 m/s^2 × (0.291 s)^2 ≈ 0.41 m
Therefore, the ball falls freely for approximately 0.41 meters during the first half of the distance.
(d) During the second half of the distance, the ball continues to fall freely due to gravity. The vertical distance it falls will be the same as in the first half, which is approximately 0.41 meters.

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Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system .

Hope it is helpful to you ☺️

Answer:

Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system.

So, the power that used by the washing machine is 400 Watt.

Hi ! Here, I will help you to calculate the power generated. Power is work done per unit time. If a person or machine can do a large amount of work in the shortest possible time, it will produce or require a large amount of power. The relationship between power, work, and time is expressed in the equation:

\( \boxed{\sf{\bold{P = \frac{W}{t}}}} \)

With the following condition :

We know that :

What was asked :

Step by step :

\( \sf{P = \frac{W}{t}} \)

\( \sf{P = \frac{7,200}{18}} \)

\( \boxed{\sf{P = 400 \: Watt}} \)

So, the power that used by the washing machine is 400 Watt.

Answer:

Explanation:

Meters per second

Answer:

m/s (meters per second)

Explanation:

The main advantage of the scientific method is that it is a systematic and objective way to acquire knowledge. The scientific method is a process for acquiring knowledge that has been used to great success in understanding the physical world. Astrology, on the other hand, is based on subjective interpretations of the positions of the stars and planets.

The scientific method is a process for acquiring knowledge that has been used to great success in understanding the physical world. It is based on the following steps:

1. **Observation:** The scientist observes a phenomenon and asks questions about it.

2. **Hypothesis:** The scientist proposes a hypothesis, or a possible explanation for the phenomenon.

3. **Experimentation:** The scientist designs experiments to test the hypothesis.

4. **Data analysis:** The scientist collects data from the experiments and analyzes it.

5. **Conclusion:** The scientist draws a conclusion about the hypothesis based on the data analysis.

The scientific method is an iterative process, meaning that the scientist may go back and forth between the different steps as needed.

Astrology, on the other hand, is a system of divination that attempts to predict future events by interpreting the positions of the stars and planets. Astrology is not based on the scientific method, and there is no evidence that it is a reliable way to predict the future.

The main advantage of the scientific method is that it is a systematic and objective way to acquire knowledge. The steps of the scientific method are designed to minimize bias and to ensure that the results of the experiments are repeatable. This makes the scientific method a reliable way to learn about the physical world.

Astrology, on the other hand, is based on subjective interpretations of the positions of the stars and planets. There is no scientific evidence to support the claims of astrology, and the results of astrological predictions are not repeatable.

In conclusion, the scientific method is a more reliable way to understand the physical world than astrology. The scientific method is based on a systematic and objective approach to acquiring knowledge, while astrology is based on subjective interpretations of the positions of the stars and planets.

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The data transmission range of a bioradio unit was typically around 10 meters, and factors such as signal interference, obstacles, and antenna quality could have influenced its transmission range.

The data transmission range of a bioradio unit, which is used for wireless transmission of biological signals, can vary depending on several factors. Generally, the range can vary from a few meters up to several tens of meters.

Several factors can influence the transmission range of the bioradio unit, including the frequency of the signal, the power of the transmitter, the presence of obstacles between the transmitter and receiver, and the sensitivity of the receiver. Additionally, environmental factors such as interference from other devices and noise levels can also affect the transmission range.

Other factors that may influence the transmission range of the bioradio unit include the quality and type of antenna used, the quality and placement of the grounding system, and the specific characteristics of the biological signals being transmitted.

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The force of gravity is weaker on the Moon than on Earth because the Moon has less mass than Earth.

The Moon's surface gravity is weaker because it has a smaller mass than Earth. The surface gravity of a body is inversely related to the square of its radius but directly proportional to its mass. The moon is 1100 times the mass and 14 times the radius of the earth.

Though not as a result of the absence of an atmosphere, the moon really has less gravity than the earth. The moon has far less mass, which explains why. A full-sized truck has more mass than a human since mass is simply a measure of how much stuff is in something.

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Answer:

Below

Explanation:

Work = force x distance   ==>  the forces during the 3 stages are different

a)   I will assume accel is constant for the first 10 m

             Average velocity = 5/2 = 2.5 m/s

               10 m / 2.5 m/s = 4 seconds

                 then a = 5 m/s / 4 s = 1.25 m/s^2   <==this accel is added to 'g'

                          F = ma

                                = 80 * (9.81 + 1.25) = 884.8 N

                        W = 884.8 * 10 = 8848 J

b)   This one is easier    W = F * d =  (80)(9.81)(10) = 7848 J

c)    Now we decelerate  at 1.25 m/s^2 <==== this SUBTRACTS from g

           W = ( 80 )(9.81-1.25)*10 = 6848 J  

Answer:

C

Explanation:

Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed. C

N and N2 are not independent after Joint Probability Mass Function

Given that a box of 8 light bulbs contains 2 defective bulbs. The light bulbs are tested one at a time until the defective bulbs are found.

Let N1 be the number of tests done until the first defective bulb is found and

let N2 be the same for the second bulb.

(a) Joint Probability Mass Function of N and N2

The probability of finding the first defective bulb at the nth trial is given by:

P(N1 = n) = P(first defective bulb on nth trial)P(first n − 1 bulbs are not defective)= (2/8) × (6/7) × (5/6) × · · · × [(8 − n + 3)/ (9 − n)]On the nth trial, there are 8 − n + 1 = 9 − n bulbs left, including the defective one, hence (9 - n) bulbs in the denominator.

If the first defective bulb was found on the nth trial, there are 2 defective bulbs left out of 8 bulbs remaining. Therefore, the probability of finding the second defective bulb at the mth trial given that the first was found on the nth trial is:

P(N2 = m | N1 = n) = P(noth defective bulbs in n - 1 trials) × P(defective bulb on mth trial out of 8 - n remaining bulbs)= (6/8) × (5/7) × (4/6) × · · · × [(8 - n - 1 - m + 3)/ (9 - n - m)] × (2/ (8 - n))= (3 - n + m)/ (10 - n - m) × (2/ (8 - n))

For the second defective bulb to be found on the mth trial, there must be no defective bulbs among the first n - 1 bulbs and there are 8 - n bulbs remaining, including one defective one. Therefore, 6 bulbs in the denominator. Also, there are (8 - n - 1) bulbs remaining for the m - 1 non-defective bulbs, giving (8 - n - 1 - m + 3) in the denominator.

Therefore, there are (9 - n - m) bulbs remaining for the mth trial.(b) Are N and N2 independent?

To check if N and N2 are independent, we need to check whether P(N1 = n, N2 = m) = P(N1 = n)P(N2 = m) for all possible n and m. This can be done using the Joint Probability Mass Function of N and N2.

P(N1 = n, N2 = m) = P(N2 = m | N1 = n) × P(N1 = n)= (3 - n + m)/ (10 - n - m) × (2/ (8 - n)) × (2/8) × (6/7) × (5/6) × · · · × [(8 − n + 3)/ (9 − n)]Therefore, N and N2 are not independent.

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Answer:

circuit b will have the higher current than circuit a

Answer:

the answer is c

Explanation:

Answer: c. Weight lifting twice a week

Explanation:

The situation described, where a school bus travels at 35 mph and slows down as it approaches a red light, is an example of deceleration or negative acceleration.

Acceleration refers to any change in velocity, which includes both increasing and decreasing speed. In this case, the bus is initially traveling at a constant speed of 35 mph, indicating zero acceleration. However, as it approaches the red light, the bus slows down, which means its velocity decreases. This change in velocity is known as deceleration or negative acceleration. The bus is slowing down to eventually come to a stop at the red light. A school bus is a type of vehicle specifically designed for transporting students to and from educational institutions. It is typically larger than a regular passenger car and is equipped with safety features to ensure the well-being of the students.

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Answer:

Potential energy = 1.6 J

Work done = -1.6 J

Explanation:

Potential Energy in the spring at this extension?

The potential energy U in the spring is U = 1/2kx² where k = spring constant = F/x where F = force = 20 N and x = extension = 0.16 m. So k = 20 N/0.16 m = 125 N/m

U = 1/2kx²

= 1/2 × 125 N/m × (0.16 m)²

= 1.6 J

What is the work done to extend the spring. 16 meters

Work done W = U₁ - U₂ where U₁ = initial potential energy = 0 and U₂ = final potential energy = 1.6 J

W = 0 - 1.6 J

   = -1.6 J

Answer:

a

Explanation:

just did it on a p e x

Aluminum oxide consists of one aluminum ion (Al3+) and two oxygen ions (O2-) chemically bonded together to form the compound Al2O3. The correct option is A.

A chemical bond is a force of attraction that holds two or more atoms together in a molecule or compound. Atoms can bond together by sharing or exchanging electrons in their outermost energy levels, which is also known as the valence shell.

There are three main types of chemical bonds:

Covalent bond: This bond occurs when two or more atoms share electrons in their outermost energy level. Covalent bonds are strong and are commonly found in molecules of compounds like water (H2O) and methane (CH4).

Ionic bond: This bond occurs when one atom donates one or more electrons to another atom, forming oppositely charged ions that are then attracted to each other. Ionic bonds are strong and are commonly found in compounds like table salt (NaCl) and calcium chloride (CaCl2).

Metallic bond: This bond occurs between atoms of metallic elements, where their outer electrons are delocalized and shared among all the atoms in the metallic structure. Metallic bonds are strong and are responsible for the properties of metals like malleability and conductivity.

Chemical bonds are essential for the formation of molecules and compounds that make up all matter in the universe. Understanding chemical bonds is crucial for fields such as chemistry, biology, and materials science.

Here in the Question,

Option B, "A12+ and O3-", is not true because aluminum ions, in their stable state, lose three electrons to form a +3 ion, not a +2 ion.

Option C, "A13- and O2+", is not true because aluminum ions, in their stable state, lose three electrons to form a +3 ion, not a -3 ion.

Option D, "A12- and O3+", is not true because oxygen ions, in their stable state, gain two electrons to form a -2 ion, not a +3 ion.

Therefore, option A, "Al3+ and O2-", is the correct answer as aluminum oxide consists of one aluminum ion with a charge of +3 and two oxygen ions, each with a charge of -2, that bond together to form the compound Al2O3.

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(a) When l = 2, the possible magnetic quantum numbers (mₑ) are -2, -1, 0, 1, and 2.(b) When l = 4, the possible magnetic quantum numbers (mₑ) are -4, -3, -2, -1, 0, 1, 2, 3, and 4.

(a) The magnetic quantum number (mₑ) represents the projection of the orbital angular momentum along a chosen axis. It takes on integer values ranging from -l to +l, including zero. When l = 2, the possible values for mₑ are -2, -1, 0, 1, and 2. These values represent the five different orientations of the orbital angular momentum corresponding to the d orbital.

(b) Similarly, when l = 4, the possible values for mₑ are -4, -3, -2, -1, 0, 1, 2, 3, and 4. These values represent the nine different orientations of the orbital angular momentum corresponding to the f orbital. The range of values for mₑ is determined by the value of l and follows the pattern of -l to +l, including zero.Therefore, when l = 2, the possible magnetic quantum numbers (mₑ) are -2, -1, 0, 1, and 2. And when l = 4, the possible magnetic quantum numbers (mₑ) are -4, -3, -2, -1, 0, 1, 2, 3, and 4.

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Answer:

5

Explanation:

If you straighten out the line, it touches the 5, which makes the length 5