Why is the plastic shopping bag transparent

True. If E=0, at all points of a closed surface that means there is no electric field present. Therefore, electric flux should also be zero.

This leads us to the Gauss's Law, which says that the electrical flux going through a closed surface, is that the sum of all charges Q inside that closed surface, divided by permittivity of free space E₀. If that flux is zero, meaning there is no net charge inside the shape.

The net flux through a closed surface is a quantitative measure of the net charge inside a closed surface. 2. the web electric flux through any closed surface surrounding a net charge 'q' is independent of the shape of the surface.

The flux of an electrical field through a closed surface will be always zero if and only if there is no net charge in the volume enclosed by the surface. the quantity of electric flux is always proportional to the charges inside the surface

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Answer:

speed

Explanation:

Change in velocity, not velocity, is used to calculate the average acceleration. Velocity is displacement over time.

It is defined as the ratio of change in velocity to time. It is given by:

Acceleration= Change in velocity / time

a= u-v / t

where,

u= initial velocity

v= final velocity

t= time

Thus, we can conclude that a change in velocity is used to calculate average acceleration.

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Answer: Everything except heat and density

Explanation:

Explanation:

The reason is simple. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

Therefore, the resultant vector of the kite string has a magnitude of 168.5 meters and makes an angle of 65.5 degrees with the horizontal axis.

In physics, a vector is a quantity that has both magnitude and direction. It can be represented graphically as an arrow, where the length of the arrow represents the magnitude of the vector and the direction of the arrow represents the direction of the vector. Vectors can be added, subtracted, and multiplied using mathematical operations, such as the dot product and cross product. These operations allow us to manipulate and analyze vectors mathematically, which is useful for understanding and predicting the behavior of physical systems.

Here,

To find the resultant vector of the kite string, we can use the Pythagorean theorem and trigonometric functions. First, we can find the magnitude of the resultant vector using the Pythagorean theorem:

magnitude = √((72 m)² + (150 m)²)

magnitude = 168.5 m

Next, we can find the angle that the resultant vector makes with the horizontal axis using trigonometric functions.

tan(theta) = opposite / adjacent

tan(theta) = (150 m) / (72 m)

theta = tan⁻¹(150 m / 72 m)

theta = 65.5 degrees

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The transmitted intensity is approximately 12.98 W/m^2.

The intensity of the light transmitted through a surface is given by:

i1 = i0 * cos(θ0) * cos(θta)

where i0 is the intensity of the incident light, θ0 is the angle of incidence (measured from the surface normal), and θta is the angle of transmission (measured from the surface normal).

Substituting the given values, we get:

i1 = 20.0 W/m^2 * cos(25.0°) * cos(40.0°)

i1 = 12.98 W/m^2

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The ratio of the radii of the two species is 1:4.

We know that the magnetic field and the electric potential difference are the same for both species

.Therefore, the velocity of the particles will be the same for both X1 and X4, as the mass of the two particles is different.

The mass of X4 is four times that of X1, and the charge of X4 is also four times that of X1.

The mass and the charge are in the numerator and denominator of the formula for the radius of the path respectively.

Therefore, the ratio of the radii of the two species can be written as:

r1 / r4 = (mX1 * qX4) / (mX4 * qX1)

r1 / r4 = (mX1 * 4qX1) / (4mX1 * qX1)

r1 / r4 = 1/4

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If the change of variables \(\(u = x^2\)\)is used to evaluate the definite integral, the new limits can be seen as \(\(u = a^2\)\)  for the lower limit and \(\(u = b^2\)\)  for the upper limit.

To determine the new limits of integration when using the change of variables \(\(u = x^2\)\), we need to express the original limits of integration in terms of the new variable \(\(u\)\).

Let's consider the definite integral:

\(\[I = \int_{a}^{b} f(x) \, dx.\]\)

Using the change of variables \(\(u = x^2\),\) we need to find the values of \(\(u\)\) corresponding to the original limits \(\(x = a\)\) and \(\(x = b\).\)

For the lower limit, \(\(x = a\)\), we substitute into the equation \(\(u = x^2\)\):

\(\[u = a^2.\]\)

For the upper limit, \(x = b\), we substitute into the equation \(\(u = x^2\)\):

\(\[u = b^2.\]\)

Therefore, the new limits of integration, expressed in terms of the variable \(\(u\)\), are \(\(u = a^2\)\) for the lower limit and \(\(u = b^2\)\) for the upper limit.

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Answer: A rotating body or system can be in equilibrium if its rate of rotation is constant and remains unchanged by the forces acting on it.

hope this helped

Debris collecting around pilings is most likely to create a boating hazard around river bridges.

The option (c) is the correct option.

Boating Hazards:

Dams, submerged items, freezing water, rapidly changing weather, sunstroke, and current are just a few of the dangers that boaters may encounter. It's not always easy to see these risks. These risks must be recognized by boaters, and they must always be prepared to prevent hazards.

Operator negligence is the most frequent reason for boating accidents, according to US Coast Guard (USCG) recreational boating statistics from 2019. Inattentiveness on the part of the operator can result in crashes, people falling overboard, and slip-and-fall incidents on board, all of which can result in life-threatening injuries.

The greatest places to find more about any potential local risks are marinas and local boaters. Check any nearby marine charts as well to learn about potential dangers and how to avoid them.

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Answer:

Possiable answer by edge:

The shape of a river’s stream bed affects the speed and eroding power of a river by influencing the amount of friction between the water flowing through the river and the stream bed below. Friction is the force that opposes the motion of one surface as it moves across another surface. In a river, there is friction between the flowing water and the stream bed beneath it. Where a river is deep, less water comes into contact with the stream bed, so there is less friction. The reduced friction means there is less opposition to the water’s motion, so the river flows at a greater speed and has more kinetic energy for erosion. On the other hand, where a river is shallow, more water comes into contact with the stream bed, so there is more friction. The increased friction means there is more opposition to the water’s motion, so the river flows at a lesser speed and has less kinetic energy for erosion. Also, the roughness of a stream bed covered with boulders and other obstacles causes the water to flow through the river in a turbulent fashion. This could cause the river to move slower in some cases or erode more in other cases.

Explanation:

summary of answer:

influencing the amount of friction between the water flowing through the river and the stream bed below.

Answer:

The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 30% is reflected back to space and does not heat the surface.

Sensors inside IoT wearable devices typically collect information such as location and heart rate, temperature and humidity.

IoT wearable devices are designed to monitor various aspects of human health and the surrounding environment. They incorporate sensors that can collect data to provide valuable insights and enable personalized experiences.

Location and heart rate monitoring are common features in many wearable devices. Location tracking allows users to track their movements and enables applications like fitness tracking or navigation. Heart rate monitoring provides real-time information about the user's heart rate, which is crucial for fitness monitoring, stress management, and detecting abnormal heart rhythms.

Temperature and humidity sensors are also commonly integrated into wearable devices. These sensors measure the ambient temperature and humidity levels, providing information about the surrounding environment. This data can be used for various purposes such as monitoring comfort levels, assessing heat stress, or tracking environmental conditions for specific applications like agriculture or sports.

Collecting pH and air pressure data is less common in consumer wearable devices but may be used in specialized applications. pH sensors can be used for monitoring sweat or other bodily fluids to gain insights into hydration levels or assess certain health conditions. Air pressure sensors can provide information about altitude changes, weather patterns, or even be used for indoor air quality monitoring.

Overall, the sensors integrated into IoT wearable devices are selected based on the specific purpose and application of the device, aiming to provide meaningful data for the intended use case.

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Explanation:

Hello, nice to meet you.

this answer will help for you

Answer:

If a child is holding a ball with a diameter of 4.20 cm and average density of 0.0839 g/cm³ underwater then the force required to hold the ball completely submerged will be 0.043 N.

Explanation:

When an object is submerged in a fluid, it experiences an upward force known as the buoyant force. This force is equal to the weight of the fluid displaced by the object and acts in the opposite direction to gravity. If the object is less dense than the fluid, it will float, whereas if it is denser, it will sink.

In this scenario, a child is holding a ball with a diameter of 4.20 cm and an average density of 0.0839 g/cm³ under water. To determine the force needed to hold it completely submerged, we can use the equation:

Buoyant force = weight of fluid displaced = density of fluid x volume of displaced fluid x gravitational acceleration

Since the ball is completely submerged, it displaces a volume of fluid equal to its own volume. The volume of a sphere is given by the formula:

Volume = (4/3) x π x (diameter/2)³

Substituting the given values, we get:

Volume = (4/3) x π x (4.20/2)³ = 4.378 x 10⁻⁵ m³

The fluid in which the ball is submerged has a density of water, which is approximately 1000 kg/m³. Thus, we can calculate the weight of fluid displaced by the ball:

Weight of fluid displaced = density of fluid x volume of displaced fluid x gravitational acceleration

= 1000 kg/m³ x 4.378 x 10⁻⁵ m³ x 9.81 m/s²

= 0.043 N

Therefore, the buoyant force acting on the ball is 0.043 N, which is the force needed to hold the ball completely submerged.

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The force needed to hold the ball completely submerged is 0.0273 N. This is equal to the buoyant force acting on the ball, which is the weight of the water displaced by the ball.

What is Density?

Density is a physical property of matter that measures how much mass is contained in a given volume of a substance. It is typically represented by the symbol "ρ" (rho) and has units of mass per unit volume, such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

the ball is not moving up or down, the force of gravity pulling the ball down must be balanced by an equal and opposite force acting upwards. This force is the force needed to hold the ball completely submerged, and is given by:

Fsubmerged = Fbuoyant = 0.377 N

However, we need to take into account the fact that the ball has its own weight. The weight of the ball can be calculated using its mass and the acceleration due to gravity:

Fweight = mball × g = density × volume × g = 0.0839 g/cm^3 × 38.48 cm^3 × 9.81 m/s^2 = 0.0327 N

Therefore, the net force needed to hold the ball completely submerged is:

Fsubmerged = Fbuoyant - Fweight = 0.377 N - 0.0327 N = 0.344 N

However, we need to convert this to newtons since the SI unit of force is newtons, so we get:

Fsubmerged = 0.344 N

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Answer:electric

Explanation:

Answer:

Explanation:

The answer is Temperature difference

Answer:

C

Explanation:

is the answer ,..........................

Physics is the area of science that compares and describes quantities and movements of matter and energy. The correct option is option 2.

Physics is the study of matter and energy in space and time, as well as their interactions. The interactions of particles and physical objects are governed by energy and the fundamental forces of nature. Science's study of matter, its motion through space and time, as well as related ideas like energy and force, is known as physics.

Therefore, the branch of science known as physics compares and describes the amounts and motions of matter and energy. The right choice is number two.

The complete question is given below:-

What area of science compares and describes quantities and movements of matter and energy?

1. earth science

2. physics

3. chemistry

4. biology

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Answer:

He is pink panther. How nerdy does he sound?

Explanation:

The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

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Answer:

seahawks, la kings

Explanation:

Explanation:

first convert 90m into cm

9000cm × 7cm = x

x= 63000 seconds

Answer:

balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree

unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground

Explanation:

all the balanced ones are either moving at a constant speed or are skill

all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah

Answer: C

Explanation:

Make sure your calculator is in degree mode.
The direction of the net momentum is θ degrees measured clockwise from the north to the west.

To determine the direction of the net momentum, follow these steps:
Step 1: Identify the momentum components
Since the question does not provide specific information about the magnitudes or directions of the individual momenta, let's assume that we have two momenta: momentum A pointing north, and momentum B pointing west.

We can represent them as vector quantities A and B, respectively.
Step 2: Find the horizontal (westward) and vertical (northward) components of the net momentum
The horizontal component of the net momentum is the westward momentum (momentum B).

The vertical component of the net momentum is the northward momentum (momentum A).
Step 3: Use the Pythagorean theorem to find the magnitude of the net momentum
The magnitude of the net momentum (C) can be found by using the Pythagorean theorem: \(C^2 = A^2 + B^2.\)

Take the square root of both sides to find the magnitude of the net momentum: \(C = sqrt(A^2 + B^2).\)
Step 4: Use trigonometry to find the direction of the net momentum
To find the direction of the net momentum, we need to calculate the angle between the net momentum and the north direction, measured clockwise.

We can use the tangent function in trigonometry for this purpose: tan(θ) = B/A,

where θ is the angle between the net momentum and the north direction.
Step 5: Calculate the angle in degrees
To find the angle in degrees, take the inverse tangent (arctan) of the ratio B/A: θ = arctan(B/A).

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Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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If you were to rank relative frequency of the various forms of light, the rankings for the ones in part A would be different. Due to the direct relationship between energy and frequency, the ranking on frequency would follow the same pattern.

The amount of waves which pass a fixed place in a unit of time is referred to as frequency in physics. It also indicates how many vibrations or cycles a body undergoing periodic motion makes in a given amount of time.

The frequency of a sound pressure wave, also known as pitch, is indeed the amount of times per sec that this really repeats. The frequency of a drum beat is substantially lower than that of a whistle, while the frequency of a bullfrog cry is lower than that of a cricket. The number of oscillations decreases with decreasing frequency.

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Answer:

To answer the first question, the moment is equal to the force multiplied by the perpendicular distance from the pivot. So the moment in this case is 12 x 0.2 = 24 Nm. For the second question, the total clockwise and anticlockwise moments must be equal for an object to not turn. If the clockwise moment is greater than the anticlockwise moment, the object will turn clockwise, and if the anticlockwise moment is greater than the clockwise moment, the object will turn anticlockwise.

Answer: Negative Incentives

Decrease

More

Explanation:

Took it on EDG 2021

Price can be defined as the amount of money that must be paid by a buyer (customer) to a seller (producer or owner), so as to acquire goods and services.

This ultimately implies that, it is an amount of money a customer that is buying goods and services are willing to pay to the seller (producer or owner) for the goods and services being offered.

In this scenario, we can deduce the following points:

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