heisenberg's uncertainty principle states that we cannot know location and momentum of a particle at the same time along a given coordinate. it seems that with macroscopic objects it is not a problem to measure both at the same time...think of a car. we can very well determine its location and speed (momentum) at the same time. why does the uncertainty principle seem not to play a significant role here?

If a rocket takes off from Earth with a certain force, there are several things that must be true about Earth to make this possible.

Firstly, Earth must have a gravitational field that attracts the rocket toward its center. This gravitational force pulls the rocket toward the ground, and the rocket must overcome it with a force greater than the force of gravity in order to take off.

Secondly, Earth's atmosphere must be present, as the rocket needs to push against the air molecules to create thrust and lift off the ground. Thirdly, Earth's surface must be firm enough to support the launch of the rocket, with a strong and stable launchpad to prevent any accidents.

Fourthly, Earth's rotational speed and position in its orbit around the Sun must also be taken into account, as this affects the required trajectory of the rocket for a successful launch. Overall, a combination of Earth's gravitational force, atmosphere, surface conditions, and position in its orbit all play a crucial role in enabling a rocket to take off from Earth.

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The TOTAL force acting on the roof is 5,947.6 N.

The pressure difference between inside and outside building is calculated as;

ΔP = ¹/₂ρv²

where;

ΔP = ¹/₂ x 1.293 x 14.8²

ΔP = 141.6 Pa

The TOTAL force acting on the roof is calculated from the product of the pressure difference and area.

F = ΔP x A

F = 141.6 x 42

F = 5,947.6 N

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The closest answer to this value is option C) about 25 mW. However, it is important to note that this is only an approximate estimate and the actual signal strength may vary depending on various factors.

The strength of a signal decreases as it travels further from its source due to factors such as attenuation and interference. To calculate the approximate strength of a signal at 40 meters, we need to consider the distance between the source and the receiver, as well as any obstacles or interference that may affect the signal.

Assuming that the signal decreases in strength by a factor of 4 for every 10 meters of distance traveled (which is a common approximation), we can use the following formula to estimate the signal strength at 40 meters:

Signal strength at 40 meters = (Signal strength at 10 meters) x (distance ratio)^2
Distance ratio = (distance at 40 meters) / (distance at 10 meters) = 4

Plugging in the values, we get:

Signal strength at 40 meters = 100 mW x 4^2 = 1600 mW

Therefore, the signal strength at 40 meters is approximately 1600 mW. However, this value is not one of the options given in the question. To find the closest answer, we can use a logarithmic scale to convert the signal strength from mW to dBm (decibel-milliwatt), which is a more commonly used unit for measuring signal strength.

Using the formula dBm = 10 x log10 (mW), we get:

Signal strength at 40 meters = 32 dBm

To convert this value back to mW, we use the formula mW = 10^(dBm/10), which gives us:

Signal strength at 40 meters = 1584.89 mW

The closest answer to this value is option C) about 25 mW. However, it is important to note that this is only an approximate estimate and the actual signal strength may vary depending on various factors.

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Answer:

Parasitic Relationship

A symbiotic relationship that is mutualism exists between the comma teasel and all of the other plants.

Symbiosis or symbiotic relationship is any type of close and long-term biological interaction which is present between two different biological organisms, be it mutualistic relationship, commensalistic relationship, or parasitic relationship. The organisms, each termed as a symbiont, must be of different species.

The comma teasel and all of the other plants share a relationship where, the comma teasel pollinates flowers of different plant species. Pollination is important for the reproduction in plants and in return, the plants provide nectar to the organism.

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Answer:

Conduction is the transfer of heat between substances that are in direct contact with each other. ... Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them.

Explanation:

They undergo internal fertilization. They lose their tails as adults. They have wet, moist skin. They have long, strong legs. They begin life with gills.

Answer:

The answer to your question is 404.2000

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:

Theoretically it would be side to side

Explanation:

This answer is most likely to be side to side because of the tectonic plates shifting but to be honest who knows

The seismic waves which travel across Earth's surface are surface waves. The surface waves move up and down or back and forth in a circular motion.

A seismic wave can be described as a wave of acoustic energy that travels through the Earth. They form due to an earthquake, volcanic eruption, magma movement, and a large man-made explosion. Seismic waves are differentiated from seismic noise which is persistent low-amplitude vibration developing from various natural and anthropogenic sources.

The velocity of a seismic wave depends on the elasticity and density of the medium. The velocity of the waves tends to increase with depth through Earth's crust and mantle but reduces drastically going from the mantle to Earth's outer core.

Seismic surface waves travel along the surface of the earth and can be classified as a form of mechanical surface waves. These surface waves, diminish as they get further from the surface and travel more slowly than seismic body waves (P and S).

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Please find attached photograph for your answer. Do comment whether it is useful or not.

The girl encounters a 9100 N average force to the west.

The interaction between two things or between an object and its surroundings is characterized by force, a physical quantity. It can be explained simply as the push or pull that one item applies to another.

An object's mass (m) multiplied by its velocity (v) will give it momentum (p):

p = mv

The girl's initial momentum is:

To the East, p1 = (35 kg)(4.5 m/s) = 157.5 kg*m/s

The girl strikes the tree and rebounded with a speed of 3.3 m/s to the west. Her final momentum (p2) can be found as follows:

To the West, p2 = (35 kg)(-3.3 m/s) = -115.5 kg*m/s

Thus, the girl's change in momentum (∆p) is: ∆p = p2 - p1 = -115.5 kgm/s - 157.5 kgm/s = -273 kg*m/s to the West.

We are aware that the time spent interacting with the tree was 0.03 seconds. Hence, using the impulse-momentum theorem, the girl's average force (F) can be calculated as follows:

F = Δp / Δt

F = (-273 kg*m/s) / (0.03 s) = -9100 N to the West

The force is acting in the opposite direction to the girl's starting velocity, which is to the east, as indicated by the force's negative sign. As a result, the girl encounters a 9100 N average force to the west.

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Answer: the weight of the box is 980N

Explanation:

The weight an object has is defined as  the force of gravity acting  on that object which is given as

w =m x g

Since weight is defined as a force, it can also be written as

w=mg

= F= mg

where m= mass of the object in kg given as 100Kg

an g is the gravitational acceleration in  m/s^2 =  g is 9.8 m/s2

F= mg

F = 100 kg x 9.8 m/s2

F== 980Kgm/s^2 = 980N

Therefore the weight of the box is 980N

Answer:

A lightbulb has 25 W stamped on it. What does this mean?:

These labels mean that each lightbulb has Its respective power delivered to It when It Is connected to a constant

Explanation:

Stars form from molecular clouds through a process known as stellar formation.

These clouds, characterized by low temperatures and high densities, provide the ideal conditions for atoms to combine and form molecules. With a mass range spanning from a few solar masses to millions of solar masses, molecular clouds serve as the birthplaces of new stars. The Pleiades cluster serves as a notable example of stars that have recently formed within such a stellar nursery.

The formation of stars from molecular clouds involves several key steps. Firstly, gravitational forces acting on regions of higher density within the cloud cause them to collapse under their own gravity. As the cloud collapses, it begins to fragment into smaller, denser clumps called protostellar cores. These cores continue to collapse, and their central regions become increasingly dense and hot. At this stage, they are known as protostars.

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Answer:

it started to move a 1 second

Answer:

at one second :p

Explanation:

Answer:

fe

Explanation:

so if the Impact of the system is 2 than it appositive will be fe

Answer:

Explanation:

Given:

q₁ = q₂ = q = +1.6·10⁻¹⁹ C

m₁ = m₂ = m = 1.67·10⁻²⁷  kg

r = 1 m

k =

G = 6.67·10⁻¹¹ N·m² / kg²

k = 9·10⁹ N·m² / C²

__________________

Fg - ?

Fe - ?

Gravitational force of attraction of protons:

Fg = G·m₁·m₂ / r² = G·m² / r²

Coulomb repulsive force of protons:

Fe = k·q₁·q₂ / r² = k·q² / r²

The Coulomb force of repulsion of protons is greater than the force of gravitational attraction of protons:

Fe / Fg = k·q² / (G·m²) = (k/G)· (q/m)²

Fe / Fg = (9·10⁹ /6.67·10⁻¹¹)· (1.6·10⁻¹⁹/1.67·10⁻²⁷ )² ≈ 1,2·10³⁶   times more

Answer:

Assumption: the acceleration of this bus is constant while the brake was applied.

Acceleration of this bus: approximately \(\left(-6.0\; \rm m \cdot s^{-2}\right)\).

It took the bus approximately \(1.7\;\rm s\) to come to a stop.

Explanation:

Quantities:

Consider the following SUVAT equation:

\(\displaystyle x = \frac{1}{2}\, \left(a\, t^2\right) + u\, t\).

On the other hand, assume that the acceleration of this bus is indeed constant. Given the initial and final velocity, the time it took for the bus to stop would be inversely proportional to the acceleration of this bus. That is:

\(\displaystyle t = \frac{v - u}{a}\).

Therefore, replace the quantity \(t\) with the expression \(\displaystyle \left(\frac{v - u}{a}\right)\) in that SUVAT equation:

\(\displaystyle x = \frac{1}{2}\, \left(a\, \left(\frac{v -u}{a}\right)^2\right) + u\, \left(\frac{v - u}{a}\right)\).

Simplify this equation:

\(\begin{aligned}x &= \frac{1}{2}\, \left(a\, {\left(\frac{v -u}{a}\right)}^2\right) + u\, \left(\frac{v - u}{a}\right) \\ &= \frac{1}{2}\left(\frac{{(v - u)}^2}{a}\right) + \frac{u\, (v - u)}{a} =\frac{1}{a}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right)\end{aligned}\).

Therefore, \(\displaystyle a= \frac{1}{x}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right)\).

In this question, the value of \(x\), \(u\), and \(v\) are already known:

Substitute these quantities into this equation to find the value of \(a\):

\(\begin{aligned} a &= \frac{1}{x}\, \left(\frac{{(v - u)}^2}{2} + u\, (v - u)\right) \\ &= \frac{1}{10\; \rm m}\times \left(\frac{{\left(0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}\right)}^2}{2} + \left(0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}\right)\times 10\; \rm m \cdot s^{-1}\right)\\ &\approx -6.0\; \rm m \cdot s^{-2}\end{aligned}\).

(The value of acceleration \(a\) is less than zero because the velocity of the bus was getting smaller.)

Substitute \(a \approx -6.0\; \rm m \cdot s^{-2}\) (alongside \(u = 10\; \rm m \cdot s^{-1}\) and \(v = 0\; \rm m \cdot s^{-1}\)) to estimate the time required for the bus to come to a stop:

\(\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{0\; \rm m \cdot s^{-1} - 10\; \rm m \cdot s^{-1}}{-6.0\; \rm m \cdot s^{-2}} \approx 1.7\; \rm s\end{aligned}\).

The force constant of the bungee cord when a person of mass 70 kg leaps on a bridge with it is 219.52 N/m.

The force constant or spring constant is a measure of the stiffness of a spring. It is the force per unit deformation of the spring. Its SI unit is N/m.

To calculate the force constant of the bungee cord, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the force constant of the bungee cord is 219.52 N/m.

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To calculate the acceleration of the refrigerator 30 seconds after a person pushes with a force of 400 N, we need to first determine the mass of the refrigerator. Let's assume that the mass of the refrigerator is 50 kg. We can use the formula F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.

To calculate the acceleration of the refrigerator 30 seconds after a person pushes with a force of 400 N, we need to first determine the mass of the refrigerator. Let's assume that the mass of the refrigerator is 50 kg. We can use the formula F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration.
We know that the force applied is 400 N, so we can plug in the values we have:
400 N = 50 kg x a
Solving for a, we get:
a = 400 N ÷ 50 kg
a = 8 m/s²
This means that 30 seconds after the person pushes the refrigerator with a force of 400 N, the refrigerator will be accelerating at a rate of 8 m/s².
To further explain, acceleration is the rate of change of velocity with respect to time. An object accelerates if it changes its velocity with time. It is measured in meters per second squared (m/s²). The force applied to the object, as well as the mass of the object, determines the acceleration of the object.

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Answer:

Your answer is: K.E = 8.3 J

Explanation:

If the height (h) = 169.2 meters (m) and the mass (m) is 0.005 kilograms (kg) the total energy will be kinetic energy which is equal to the potential energy.

K.E = P.E and also P.E equals to mgh

Then you substitute all the parameters into the formula  ↓

P.E = 0.005 × 9.81 × 169.2

P.E = 8.2908 J

So your answer is 8.2908 but if you round it is K.E = 8.3

The speeds of the light wave will be 0.56×10⁻⁵ m/sec.It is the ratio of the speed of the wave and the refractive index.

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

Given data;

the wavelength,λ= 640 nm

Wave's speed,v=?

Refractive index,n

The refractive index is the ratio of the square root of the dielectric constant;

\(\rn n= \sqrt{78}\\\\ n= 8.8\)

The relationship between the wave's wavelength, refractive index, and speed of light wave is given as;

\(\rm \lambda = \frac{c}{n} \\\\ c =n \times \lambda \\\\\ c= 8.8 \times 640 \times 10^{-9} \\\\ c= 0.56 \times 10^{-5} \ m/sec\)

Hence, the speed of the light wave will be 0.56×10⁻⁵ m/sec.

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Answer:

10

Explanation:

if you put 10 your right

(b) Commelina

Explanation:

Both chasmogamous and cleistogamous are present in Commelina.

In commelina, the flowers have anthers and stigma hanging outside of the flower. Petals are colourful and contains scent and nectars to attract birds and insects. Both of these are present in commelina flowers.

Answer:

Commelina

Explanation:

Answer:

It takes approximately 0.2041 seconds for the ball to reach its peak.

Explanation:

To determine the time it takes for the ball to reach its peak, we can use the fact that the velocity at the peak is zero.

Given:

Initial velocity (v_initial) = 2 m/s

Final velocity at peak (v_peak) = 0 m/s

The acceleration due to gravity (g) acts in the downward direction and is approximately 9.8 m/s².

Using the equation of motion:

\(v_{peak} = v_{initial} + (g * t)\)

Substituting the given values:

0 = 2 + (-9.8 * t)

Simplifying the equation:

-9.8 * t = -2

Dividing both sides by -9.8:

t = -2 / -9.8

t ≈ 0.2041 seconds

Therefore, it takes approximately 0.2041 seconds for the ball to reach its peak.

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A fuse is a short and thin piece of wire of a uniform area of cross section.

Explanation:

A fuse is a safety device in an electric plug or circuit. It contains a piece of wire which melts when there is a fault so that the flow of electricity stops.

The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting.

First attachment shows fuse arrangement normally used in the houses and second attachment shows a cartridge type of fuse that is used mainly in costly appliances of our home like an air conditioner, geyser, etc.

Explanation:

The bicyclist traveled 10 meters in the air before hitting the building

We can get the above answers by following the steps below

Firstly we have to assume there are no external forces acting on the cyclist other than gravity.

When the bicyclist is about to hit the building, all kinetic energy will be converted into potential energy because of the height at which the cyclist is.

Therefore, we can equate the initial kinetic energy of the bicyclist to the potential energy at the highest point of their trajectory

Given

KE = PE

1/2 *m*v² = m*g*h

where m is the mass of the bicyclist (40 kg), v is their initial velocity before being hit, g is the acceleration due to gravity, and h is the height

Since we need to find h, we should isolate it by. Since the initial velocity isn't directly mentioned,we can assume the value to be 13.9

h = (1/2 * v²)/g

h = (1/2 * 13.9²)/9.81

h ≈ 10 meters

Therefore, the bicyclist traveled approximately 10 meters into the air before hitting the building.

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Answer in more than 100 words:

a. To calculate the wavelength of each frequency, we can use the formula: wavelength = speed of light (c) / frequency (f).

For the first frequency of 895 MHz, the calculation would be: wavelength = 3 x 10^8 m/s / 895 x 10^6 Hz = 0.335 meters or 33.5 centimeters.

For the second frequency of 2540 MHz, the calculation would be: wavelength = 3 x 10^8 m/s / 2540 x 10^6 Hz = 0.118 meters or 11.8 centimeters.

b. Smaller hot spots in foods due to interference effects would be produced by the frequency with the shorter wavelength, which is 2540 MHz. This is because shorter wavelengths have higher frequencies and energy, which allows for more uniform heating and less interference effects. The longer wavelength of 895 MHz can cause more interference due to its lower frequency and energy, resulting in larger hot spots in the food being heated. Therefore, the higher frequency of 2540 MHz would produce smaller hot spots in foods due to interference effects.

The frequency of 2540 MHz would produce smaller hot spots in foods due to interference effects. For 895 MHz: = 33.5 cm , For 2540 MHz:=11.8 cm

a. We can use the formula: wavelength = speed of light / frequency

where the speed of light is approximately 3.00 x \(10^8\) m/s.

Converting the frequencies to Hz:

895 MHz = 895 x \(10^6\) Hz

2540 MHz = 2540 x \(10^6\)Hz

Using the formula, we get:

wavelength = 3.00 x \(10^8\)m/s / frequency

For 895 MHz:

wavelength = 3.00 x \(10^8\) m/s / 895 x \(10^6\) Hz = 0.335 m = 33.5 cm

For 2540 MHz:

wavelength = 3.00 x \(10^8\) m/s / 2540 x \(10^6\) Hz = 0.118 m = 11.8 cm

b. Smaller hot spots in foods would be produced by the frequency with a smaller wavelength. From the calculations above, we can see that the frequency of 2540 MHz produces smaller wavelength (11.8 cm) compared to 895 MHz (33.5 cm). Therefore, the frequency of 2540 MHz would produce smaller hot spots in foods due to interference effects.

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