To decide whether an object is electrically charged, we need to observe its repulsion from some other object, not its attraction. Why is attraction insufficient

Answer:

The 5-number summary is

1. Median = 0.93 W/kg

2. Lower quartile = 0.69 W/kg

3. Upper quartile = 1.16 W/kg

4. Minimum value = 0.54 W/kg

5. Maximum value = 1.42 W/kg

Explanation:

We are given the measured radiation absorption rates​ (in W/kg) corresponding to 11 cell phones.

1.16 0.85 0.69 0.75 0.95 0.93 1.18 1.17 1.42 0.54 0.57

What is 5-number summary?

A 5-number summary refers to a box plot that basically shows 5 statistical characteristics of a data set.

These statistical characteristics are:    

1. Median

2. Lower quartile

3. Upper quartile  

4. Minimum value  

5. Maximum value  

1. Median:

Arrange the data in ascending order

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

(n+1)/2 gives the median value of the data set.

(11 + 1)/2 = 6th position

Therefore, 0.93 W/kg is the median of the data set.

2. Lower quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The lower quartile is the median of the lower half of the data set.

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

The median is 6/2 = 3rd position

Therefore, the lower quartile of the data set is 0.69 W/kg

3. Upper quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The upper quartile is the median of the lower half of the data set.

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The median is 6/2 = 3rd position

Therefore, the upper quartile of the data set is 1.16 W/kg

4. Minimum value:

The minimum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the minimum value of the data set is 0.54 W/kg

5. Maximum value  

The maximum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the maximum value of the data set is 1.42 W/kg

The box plot is illustrated in the attached diagram.

Answer:

Option D (none are correct) is the appropriate solution.

Explanation:

Some other three scenarios do not correspond to something like the situation described. So, this same correct decision is the one above.

One significant method for assessing body fat distribution is measurement of waist circumference.

Waist circumference is a widely used method for assessing body fat distribution and is an important indicator of central obesity. It involves measuring the circumference of the waist at a specific anatomical landmark, typically at the level of the narrowest point between the ribs and the iliac crest.

The measurement of waist circumference provides valuable information about the distribution of body fat. Excess fat accumulation in the abdominal region, also known as central obesity or android obesity, is associated with a higher risk of various health conditions, including cardiovascular diseases, type 2 diabetes, and metabolic syndrome.

By measuring waist circumference, healthcare professionals can evaluate an individual's body fat distribution and assess their risk for developing obesity-related health problems.

The measurement of waist circumference is relatively simple and non-invasive, making it a practical method for assessing body fat distribution in clinical and research settings. It is often used in conjunction with other anthropometric measurements, such as body mass index (BMI), to provide a comprehensive evaluation of an individual's body composition and health status.

Regular monitoring of waist circumference can help track changes in body fat distribution over time and guide interventions aimed at reducing central obesity and improving overall health.

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Answer:

Rusting!

Explanation:

Rusting is a chemical reaction because it is the process of oxidation of a metal.  

Answer:

rusting

Explanation:

1. The duty charge, MPF and HMF for the Ultrasonic Vaporizer transported via air are USD$31.50, USD$2.60 and USD$0.94, respectively.

2. The duty charge, MPF and HMF for the Ultrasonic Vaporizer transported via ocean are USD$31.50, USD$0.94 and USD$0.94, respectively.

For the Ultrasonic Vaporizer transported via air

Duty Charge:

Given information;

Duty rate = 4.2%

Value of goods = USD$750

Duty charge = Value of goods x Duty rate

Duty charge = USD$750 x 4.2%

Duty charge = USD$31.50

Merchandise Processing Fee (MPF)

MPF rate = 0.3464% (as of 2021)

Value of goods = USD$750

MPF = Value of goods x MPF rate

MPF = USD$750 x 0.3464%

MPF = USD$2.60

Harbor Maintenance Fee (HMF)

HMF rate = 0.125% (as of 2021)

Value of goods = USD$750

HMF = Value of goods x HMF rate

HMF = USD$750 x 0.125%

HMF = USD$0.94

Therefore, the total import fees for the Ultrasonic Vaporizer transported via air are:

Duty charge = USD$31.50

MPF = USD$2.60

HMF = USD$0.94

For the Ultrasonic Vaporizer transported via ocean

Duty Charge:

Given information:

Duty rate = 4.2%

Value of goods = USD$750

Duty charge = Value of goods x Duty rate

Duty charge = USD$750 x 4.2%

Duty charge = USD$31.50

Merchandise Processing Fee (MPF)

MPF rate = 0.125% (as of 2021)

Value of goods = USD$750

MPF = Value of goods x MPF rate

MPF = USD$750 x 0.125%

MPF = USD$0.94

Harbor Maintenance Fee (HMF):

HMF rate = 0.125% (as of 2021)

Value of goods = USD$750

HMF = Value of goods x HMF rate

HMF = USD$750 x 0.125%

HMF = USD$0.94

Therefore, the total import fees for the Ultrasonic Vaporizer transported via ocean are:

Duty charge = USD$31.50

MPF = USD$0.94

HMF = USD$0.94

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Duty Charge=$31.50

The MPF will be $27.23.

The HMF rate is $0.125 per metric ton.

Ultrasonic Vaporizer transported via Air:

Duty Charge: $31.50

MPF: $26.79

HMF: Not applicable

Ultrasonic Vaporizer transported via Ocean:

Duty Charge: $31.50

MPF: $27.23

HMF: HMF rate and weight of the vaporizer are needed to calculate the HMF.

Ultrasonic Vaporizer transported via Air:

Duty Charge: The duty charge is calculated by multiplying the value of the product ($750) by the duty rate (4.2%): Duty Charge = \(\$750 * 4.2\%\)

= \(\$31.50.\)

MPF: The MPF for air transport is based on the value of the merchandise. As the value of $750 is below the maximum, the MPF will be $26.79.

HMF: The HMF is not applicable for air transport.

Ultrasonic Vaporizer transported via Ocean:

Duty Charge: The duty charge is calculated in the same way as for air transport: Duty Charge = \(\$750 * 4.2\%\)

= \(\$31.50\).

MPF: The MPF for ocean transport is also based on the value of the merchandise. As the value of $750 is below the maximum, the MPF will be $27.23.

HMF: The HMF is applicable for ocean transport. The HMF rate is $0.125 per metric ton. The weight of the Ultrasonic Vaporizer is needed to calculate the HMF.

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So, in Activity 2-2, if the coil is pulled away from the north pole of a magnet, it is likely that an EMF will be induced in the coil.

However, based on general principles of electromagnetism, if a coil is pulled away from the north pole of a magnet, it will experience a change in magnetic flux, which can induce an electromotive force (EMF) in the coil. This phenomenon is known as electromagnetic induction.

The magnitude and direction of the induced EMF will depend on several factors, such as the strength of the magnet, the velocity at which the coil is moved, and the orientation of the coil with respect to the magnetic field. If the coil is part of a circuit, the induced EMF can cause a current to flow in the circuit.

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Answer:

Explanation:

The new volume can be found by using the formula

\(P_1V_1 = P_2V_2\)

Since we are finding the new volume

\(V_2 = \frac{P_1V_1}{P_2} \\\)

From the question we have

101.325 kPa = 101325 Pa

96 kPa = 96000 Pa

From the question we have

\(V_2 = \frac{25 \times 96000}{101325} = \frac{2400000}{101325} \\ = 23.68615840...\)

We have the final answer as

Hope this helps you

Answer:94.62 m

Explanation:Distance=speed×time

Downhill,

Distance= 11.4 m/s×8.3 m/s

Therefore, Distance= 94.62 m (downhill)

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(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)(^o^)

The magnitude of the linear acceleration of the pack can be calculated using the following equation:a = (T - Fr) /m where a is the magnitude of the linear acceleration of the pack,T is the tension force of you on the pulley,Fr is the frictional force, and m is the mass of the pack.Substitute the given values to the formula:a = (T - Fr) / ma = (266.3 - Fr) / 23.4.

The frictional force can be determined using the moment of inertia of the pulley.I = mr²I = 2.85 kg-m²m = I / r²m = 2.85 / 0.43²m = 15.57 kgFr = maFr = 15.57 × aa = (266.3 - 15.57a) / 23.4Solve for a by multiplying both sides by 23.4:23.4a = 266.3 - 15.57a23.4a + 15.57a = 266.3a = 266.3 / 39.97a = 6.66 m/s².

Therefore, the magnitude of the linear acceleration of the pack is 6.66 m/s².If instead of using a pulley with two radii, you were to replace the two radii pulley with a simple pulley of one radius, it will be harder to hold the pack.

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Answer:

centimeters

Explanation:

earth's plates move only a few centimeters per year.

Voltage or potential difference is calculated by taking the difference between the voltages at two points. Thus, if two points have 3.0 V and 7.0 V potential, the voltage or potential difference between the two points can be found by subtracting the lower potential from the higher potential.

That is:

Potential difference = Higher potential - Lower potential
                                 = 7.0 V - 3.0 V
                                 = 4.0 V
Therefore, the potential difference between the two points is 4.0 V. The electric potential difference between two points is the work done per unit charge in moving a test charge from one point to the other.

A potential difference is a measure of the electric potential energy per unit charge between two points in an electric field. The electric potential at a point is defined as the work done per unit charge in bringing a test charge from infinity to that point.

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Answer:

true

Explanation:

Answer:

Explanation:

The momentum of an object can be found by using the formula

From the question

mass = 15 kg

velocity = 3 m/s

We have

mass = 15 × 3

We have the final answer as

Hope this helps you

Answer:

45 kg • m/s

Explanation:

The reasons that a promontory will be more vulnerable to wave erosion than a bay;- Waves bend around a promontory and strike it from both sides,- Powerful waves focus most of their energy at a promontory and - A promontory will receive more wave action than a bay.

A promontory is more vulnerable to wave erosion than a bay due to the following reasons:

1. Waves bend around a promontory and strike it from both sides: This phenomenon, called wave refraction, concentrates the wave energy on the promontory, making it more prone to erosion.

2. A promontory will receive more wave action than a bay: Bays are generally more sheltered and have a lower exposure to waves, whereas promontories are exposed to the full force of waves, leading to more erosion.

3. Powerful waves focus most of their energy at a promontory: Due to the shape of the coastline, waves tend to focus their energy on the headlands, like promontories, which makes them more vulnerable to erosion compared to bays.

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The centripetal acceleration of the professor holding onto the end of the minute hand of a clock atop City Hall is 0.00133 m/s².

Centripetal acceleration is the inward force acting on a body moving in a circular path that changes the direction of the velocity of the body and constantly pulls it toward the center of the circle.To determine the professor's centripetal acceleration, we use the formula;

`a= (v²)/r`

Where `a` is the centripetal acceleration, `v` is the velocity, and `r` is the radius. We have the length of the minute hand which is the radius of the circle.

So,`r = 4 m`We need to find the velocity which is given by the formula:

`v= (2πr)/T`

Where `π` is pi (3.14), `r` is the radius, and `T` is the time taken for one complete rotation which is 60 minutes since it's the minute hand.

Therefore;`v = (2 x 3.14 x 4 m) / (60 min x 60 s / 1 min)``v = 0.42 m/s`Substitute `v` and `r` into `a = (v²)/r` to get:`a = (0.42 m/s)² / 4 m``a = 0.00133 m/s²`

Therefore, the centripetal acceleration of the professor holding onto the end of the minute hand of a clock atop City Hall is 0.00133 m/s².

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The distance the wave traveled between the two-point is the path difference. The path difference will be 2200 nm and 3 orders of bright lines do this equal red light with a wavelength of 650 nm.

A diffraction grating is a type of optical instrument obtained with a continuous pattern. The pattern of the diffracted light by a grating depends on the structure and number of elements present.

The equation of diffraction grating is given as

\(\rm n\lambda=dsin\phi\\\\\rm n\lambda=0.50\times10^{-3}\times sin(0.25) \\\\ n\rm \lambda=2.18\times10^{-6} \;m \\\\\rm n\lambda=2200\;nm\)

Hence the path difference will be 2200 nm.

\(\rm n\lambda=2200\;nm \\\\\rm n\times650=2200 \\\\\rm n=3.38\)

n= 3

Hence 3 orders of bright lines do this equal red light with a wavelength of 650 nm.

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Answer:

I kinda dont remember the 1st law so search it up on

and it should tell u , but if u need any help from the

a) The magnetic force on a charged particle moving with velocity v in a magnetic field B is given by the formula:

F = q v B sinθ

where q is the charge of the particle and θ is the angle between v and B.

In this case, the proton has charge q = +1.602 x 10\(^-19\)C, the magnetic field strength is B = 4.3 x 10\(^-3\) T, and θ = 90° - 39° = 51° (since the proton is traveling at an angle of 39° with respect to the magnetic field, the angle between v and B is 90° - 39° = 51°).

Substituting these values and the given force F = 5.0 x 10\(^-17\) N into the formula, we can solve for the proton's speed v:

F = q v B sinθ

Therefore, the proton's speed is approximately 1.32 x 10\(^5\) m/s.

b) The kinetic energy of the proton can be calculated using the formula:

K = (1/2) m v\(^2\)

where m is the mass of the proton (which is approximately 1.67 x 10\(^-27\)kg).

Substituting the values of m and v, we get:

K = (1/2) m v\(^2\) = (1/2) (1.67 x 10\(^-27\) kg) (1.32 x 10^5 m/s)\(^2\) ≈ 1.14 x 10\(^-14 J\)

Therefore, the kinetic energy of the proton is approximately 1.14 x 10\(^-14 J\)J.

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Answer: Around 433 miles

Explanation:

The recommended minimum internal cooking temperature for ground beef, including chopped sirloin, is 160°F (71°C). This temperature should be measured using a food thermometer inserted into the thickest part of the meat.

The minimum internal cooking temperature and holding time for chopped sirloin (ground beef) depend on food safety guidelines to ensure that harmful bacteria, such as E. coli, are sufficiently destroyed.

In terms of holding time, it is generally recommended to cook ground beef until it reaches the minimum internal temperature of 160°F (71°C) and then maintain that temperature for at least 15 seconds to ensure any potential pathogens are killed.

It's important to note that these guidelines are based on food safety recommendations, and following them helps reduce the risk of foodborne illnesses. Cooking ground beef, like chopped sirloin, to the proper internal temperature is crucial for food safety.

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The distance between the 2nd and 3rd dark fringes will be 0.09 cm.

In a double-slit interference pattern, the distance between the dark fringes can be determined using the following formula:

Y = (λ × L) / d

where:

Y is the distance between the dark fringes,

λ is the wavelength of the light,

L is the distance from the double slits to the viewing screen (also known as the slit-to-screen distance), and

d is the slit separation distance.

Given:

λ = 600 nm = 600 × 10⁻⁹m (since 1 nm = 10⁻⁹ m)

L = 1.50 m

d = 3.55 μm = 3.55 × 10⁻⁶ m (since 1 μm = 10⁻⁶m)

Plugging these values into the formula, we get:

Y = (600 × 10⁻⁹ m) ×(1.50 m) / (3.55 × 10⁻⁶m)

Simplifying, we get:

Y = 0.0009 m

To convert this to centimeters, we multiply by 100 (since 1 m = 100 cm):

Y = 0.0009 m× 100 cm/m = 0.09 cm

So, the distance between the 2nd and 3rd dark fringes is 0.09 cm.

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The frequency of the violet light is\(7.5 x 10^14 Hz (Hertz).\)

The frequency of the wave is determined by dividing the velocity of light by its wavelength.

\(v=f/λWhere:v = velocity of light f = frequency λ = wavelength of the light\)

The speed of light is\(3.00 x 10^8\) meters per second (m/s).

To convert 400 cm into meters, divide 400 by 100. 400 cm = 4 m

Therefore,λ = 4 meters

Plugging these values into the formula, \(v = (3.00 x 10^8 m/s) / (4 m) = 7.5 x 10^14 Hz\)

So, the frequency of the violet light with a wavelength of \(400 cm is 7.5 x 10^14 Hz.\)

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When a substance has smaller specific heat it needs less heat to shows changes in it hence making the option D correct.

Answer:

option D) the red liquid has a smaller specific heat

Explanation:

Answer:

A negatively charged particle -q is placed at the center of a uniformly charged ring, where the ring has a total positive charge Q as shown in the following figure. The particle, confined to move along the x axis, is moved a small distance x along the axis ( where x << a) and released. Show that the particle oscillates in simple harmonic motion with a frequency given by,

The expression can be used to find the spacecraft’s acceleration if its engine created a net force of 0.10 N

\($$\begin{aligned}& a=F / m \\& a=0.10 \mathrm{~N} / 500 \mathrm{Kg}\end{aligned}$$\)

Definition:

Acceleration: The rate at which the speed and direction of a moving object vary over time. A point or object going straight forward is accelerated when it accelerates or decelerates. Even though the speed is constant, motion on a circle accelerates because the direction is always shifting.

Formula:

\($$\begin{aligned}& \mathrm{a}=\Delta \mathrm{v} / \Delta \mathrm{t} \\& \mathrm{a}=\text { acceleration } \\& \Delta \mathrm{v}=\text { change in velocity } \\& \Delta \mathrm{t}=\text { change in time }\end{aligned}$$\)

Units:

The unit of acceleration is\($\mathrm{m} \cdot \mathrm{s}^{-2}$\).

Acceleration can also be determine through following formula,

\($$\begin{aligned}& F=m \times a \\& a=F / m\end{aligned}$$\)

Given data:

Mass \($=500 \mathrm{Kg}$\)

Force \($=0.10 \mathrm{~N}$\)

Acceleration = ?

Solution:

\($$\begin{aligned}& a=F / m \\& a=0.10 \mathrm{Kg} \cdot \mathrm{m} \cdot \mathrm{s}^{-2} / 500 \mathrm{Kg} \\& a=0.0002 \mathrm{~m} \cdot \mathrm{s}^{-2}\end{aligned}\)

In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities .

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The pressure in the gas at that point is equal to the initial pressure, 100 kPa.

To expand adiabatically, there must be no heat transfer involved. Adiabatic expansion means that no heat is transferred between the gas and its surroundings; this means that if we double the volume of our gas, nothing should change in terms of temperature as long as there is no heat transfer to or from our system during expansion.

Since we're starting out with a monatomic ideal gas, we know that its entropy is going to stay constant throughout this process, so the ideal gas law gives us a relationship between pressure, volume, and temperature: PV = nRT

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When a sound enters a new medium where the sound travels faster, it means the vibration of particles is high, and the wavelength of the waves increases which means the speed of the wave has increased. The frequency on the other hand will remain constant.

Answer:

70 m.

Explanation:

Given,

Frequency, f = 20 HZ

speed of sound, v = 1400 m/s

wavelength of the waves = ?

we know,

v = f λ

Hence, the wavelength of the wave is equal to 70 m.