1.- What is net net charge on the sweater? Why?
2.- What is the net charge on the balloon? Why?

ASAP pls and thank you!!

The speed of the ball when it leaves the gun is approximately 17.66 m/s.

To determine the speed of the ball when it leaves the gun, we can use the principle of conservation of energy. At the moment when the trigger is pulled, the spring has a potential energy equal to:

U = (1/2) k x²

where k is the spring constant and x is the amount by which the spring is compressed from its unstretched length. Using the given values, we have:

U = (1/2) (20 N/m) (0.0125 m)² = 1.5625 mJ

When the spring is released, this potential energy is converted into kinetic energy of the ball, as well as work done against friction. The work done against friction is equal to:

W = f_friction x

where f_friction is the frictional force between the ball and the barrel, and x is the distance that the ball moves along the barrel. Using the given values, we have:

W = (0.02 kg) (9.81 m/s²) (0.20) (0.05 m) = 0.01962 J

The kinetic energy of the ball is equal to the difference between the potential energy of the spring and the work done against friction:

K = U - W = 1.5625 mJ - 0.01962 J = 1.5429 J

The speed of the ball when it leaves the gun is equal to the:

v = sqrt(2K/m)

where m is the mass of the ball. Using the given value of 20 g, we have:

m = 0.02 kg

Substituting the values and evaluating the expression, we get:

v = sqrt(2(1.5429 J)/(0.02 kg)) = 17.66 m/s

Therefore, the speed of the ball when it leaves the gun is approximately 17.66 m/s.

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When[tex]P = 0, Q[/tex]must be in the range between [tex]4.3 kN and 12.9 kN[/tex] to prevent either cable from becoming slack.

We may examine the forces operating on the beam to find the range of values for Q. The sum of the vertical forces must be zero when [tex]P = 0,[/tex]which indicates that the beam is in equilibrium. Our result is the equation:

[tex]Q + 7.5 - 3 - 4 = 0[/tex]

When Q is solved for, we obtain [tex]Q = 0.5 kN to 12.9 kN.[/tex] To prevent either wire from going slack, we must also ensure that both cables are under positive stress. We can accomplish this by searching for the extreme values of Q in each cable's tensions.

[tex]Q = 0.5 kN[/tex]results in a positive 7.5 kN tension in cable AB. However, cable DE's tension is negative[tex](-2.5 kN)[/tex], indicating that cable DE is under tension. is loose.

[tex]Q = 12.9 kN[/tex] results in a positive [tex]3.4 kN[/tex] tension in cable DE. Cable AB, however, has negative tension [tex](-5.4 kN),[/tex] indicating that it is slack.

The range of Q values that satisfy the requirement that neither cable sags when [tex]P = 0 is 4.3 kN to 12.9 kN.[/tex]

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The substance that would be most likely to provoke a response similar to the barium dance is c. lead.

Barium dance is used to describe the movements of the body that can occur when a person is exposed to a high level of barium. Barium is a heavy metal that can be toxic in large amounts, and exposure can occur through ingestion, inhalation, or skin contact.

Other heavy metals such as lead, mercury, can also cause similar symptoms when a person is exposed to high levels. Additionally, exposure to certain chemicals such as pesticides, solvents, and industrial pollutants can also cause neurological symptoms similar to those seen in barium.

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When a person is exposed to high quantities of other heavy metals like lead, mercury, and cadmium, comparable symptoms can also be experienced. Furthermore, neurological symptoms resembling those of barium can also be brought on by exposure to specific substances including insecticides, solvents, and industrial pollutants.

It's critical to remember that any potential exposure to these drugs needs to be taken seriously, and if you think you may have been exposed, you should get medical help right once.

based on the information in the passage, which of these substances would be most likely to provoke a response similar to the barium dance

a. oxygen

b. nitrogen

c. lead

d. sulphur

Two parallel-plate capacitors with the same charge Q but different areas (A and 2A) can be compared by looking at the capacitance. The capacitance of the second capacitor is double that of the first due to the increase in area.

Two parallel-plate capacitors with the same charge Q but different areas (A and 2A) can be compared by looking at the capacitance, which is defined as the ratio of the charge stored on the capacitor to the voltage applied across the plates. The capacitance C of a capacitor is given by the equation C=Q/V. Therefore, the capacitance of the first capacitor, C1, is C1=Q/V, and the capacitance of the second capacitor, C2, is C2=(2Q)/V. It is seen that the capacitance of the second capacitor is double that of the first. This is because the area of the second capacitor is double that of the first. Therefore, the same charge Q stored on the first capacitor is distributed over twice the area in the second capacitor, resulting in the capacitance being double. This can be mathematically expressed as C2 = 2C1. Thus, two parallel-plate capacitors with the same charge Q but different areas (A and 2A) can be compared by looking at the capacitance. The capacitance of the second capacitor is double that of the first due to the increase in area.

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The above-listed characteristics apply to moving water as an energy source. Thus, moving water can be used as an energy source.

The following are the characteristics of moving water as an energy source:

Water is an excellent resource for producing electricity since it is clean, renewable, and is available in many different forms. When water moves, it has the potential to generate energy, which can be harnessed in several ways to produce electricity. As a result, moving water is an excellent source of renewable energy, as it is available in many different forms and can be used in a variety of ways.The above-listed characteristics apply to moving water as an energy source. Thus, moving water can be used as an energy source.

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The sequence of grades of metamorphism that may be encountered moving west to east from Ohio to the crystalline core of the Appalachians is: low grade, then intermediate grade, then high grade.

Metamorphism is the process by which a rock is changed by heat and pressure. When rocks are subjected to increased heat, pressure, and/or chemically active fluids, they undergo metamorphism.

Metamorphic rocks are formed as a result of this process. During metamorphism, the mineral composition and texture of a pre-existing rock are altered.

To summarize, the sequence of grades of metamorphism that may be encountered moving west to east from Ohio to the crystalline core of the Appalachians is low grade, intermediate grade, and then high grade.

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Answer:

The linear velocity of blood in the aorta can be calculated using the equation:

v = Q / A

where v is the linear velocity, Q is the volume flow rate, and A is the cross-sectional area of the vessel.

The volume flow rate Q can be calculated using the equation:

Q = SV / t

where SV is the stroke volume and t is the duration of systole.

The cross-sectional area of the aorta can be calculated using the equation:

A = πr^2

where r is the radius of the aorta.

Given that the radius of the aorta is 1.5 cm, the stroke volume is 60 ml, and the duration of systole is 0.25 s, we can calculate the volume flow rate Q:

Q = SV / t = 60 ml / 0.25 s = 240 ml/s

Converting the units of Q to cm^3/s:

Q = 240 ml/s × 1 cm^3/1 ml = 240 cm^3/s

We can then calculate the cross-sectional area of the aorta:

A = πr^2 = π × (1.5 cm)^2 = 7.07 cm^2

Finally, we can calculate the linear velocity of blood in the aorta:

v = Q / A = 240 cm^3/s / 7.07 cm^2 = 33.9 cm/s

Therefore, the linear velocity of blood in the aorta is 33.9 cm/s.

The time that was taken for the movement of the item is observed as 3 seconds.

The equations of motion describe the motion of objects in terms of their position, velocity, acceleration, and time.

For the equation;

v = u + at

This equation relates the final velocity (v) of an object to its initial velocity (u), acceleration (a), and time (t). If three of these variables are known, the equation can be rearranged to solve for the unknown variable.

We know that;

v = u - gt

We know that the object would come to rest after being thrown.

0 = 30 - 10t

-30 = - 10t

t = 3 seconds

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The probability that an average of 22 shields will absorb more than 17.1 J/kg is approximately 0.3085.

where X is the random variable representing the energy absorbed per kilogram of the shield.

To calculate this probability, we need to know the distribution of X.

From the given information, we know that X follows a normal distribution with mean μ = 16.8 J/kg and standard deviation σ = 0.6 J/kg.

Thus, we can standardize X as follows:

Z = (X - μ)/σZ ~ N(0, 1)

P(X > 17.1) = P((X - μ)/σ > (17.1 - μ)/σ)

                = P(Z > (17.1 - 16.8)/0.6)

                = P(Z > 0.5)

Using a standard normal table, we can find the probability that Z > 0.5 to be 0.3085 (rounded to 4 decimal places).

Therefore, the probability that an average of 22 shields will absorb more than 17.1 J/kg is approximately 0.3085.

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Answer:

Explanation:

To find the speed of the tsunami:

Speed = Distance / Time

Converting the distance from miles to meters and the time from hours to seconds:

Distance = 6500 miles × 1609.34 m/mile = 10,460,210 m

Time = 17 hours × 3600 s/hour = 61,200 s

Speed = 10,460,210 m / 61,200 s ≈ 171 m/s

To convert the speed to miles per hour:

Speed = 171 m/s × 2.24 mi/hr / 1 m/s ≈ 383 mi/hr

So the speed of the tsunami is approximately 171 m/s or 383 mi/hr.

To find the average frequency:

Wave speed = frequency × wavelength

The wavelength is twice the width of the wave:

Wavelength = 2 × 22 m = 44 m

Frequency = wave speed / wavelength

Frequency = 171 m/s / 44 m ≈ 3.9 Hz

So the average frequency of the tsunami is approximately 3.9 Hz.

Explanation:

Ff = mg ( .25)

KE = 1/2 m (2.5)^2

Work of friction    mg (.25) X (d)      must equal the KE for the disc to stop

  mg(.25)(d) = 1/2 m ( 2.5)^2   <=== Divide both sides by 'm'

    g (.25)(d) = 1/2 ( 2.5)^2

    9.81 (.25) d = 1/2 ( 2.5)^2

      d = 1.27 m

Answer: exothermic, chemical bonds between oxygen atoms.

Explanation:

To find:-

Answer:-

We are here given that two aeroplanes are travelling in opposite directions to each other that is North and South .

Speed to pilot traveling towards north is ,

[tex]\implies v_N = 400\ km/hr \\[/tex]

Speed of pilot traveling towards south is ,

[tex]\implies v_S = 300\ km/hr \\[/tex]

Since they are traveling opposite directions the relative speed will be the sum of their speeds that is ,

[tex]\implies v_{relative} = 300km/hr + 400 km/hr \\[/tex]

[tex]\implies \underline{\underline{ v_{relative}= 700km/hr}} \\[/tex]

Hence the relative speed is 700km/hr .

and we are done!

The y-component of the initial velocity of C be if all three objects are to end up moving at 0.50 m/s in the y-direction after the collision with the velocity -0.44 m/s.

Part A,

the x-component of the initial velocity of C must be 0.26 m/s. To answer Part B, the y-component of the initial velocity of C must be -0.44 m/s.

To solve this problem, we can use the law of conservation of momentum. This states that the total momentum before the collision is equal to the total momentum after the collision.

We can use this to calculate the velocity of C in each direction.

We know that A and B have an initial velocity in the x-direction of 0.50 m/s and 1.50 m/s respectively, and the velocity in the y-direction is 0 m/s for both. We also know that the total mass is 0.100 kg. So the total initial momentum in the x-direction is:

[tex]Momentum_x = (mass_A x velocity_A_x) + (mass_B x velocity_B_x)[/tex]

= (0.020 kg x 0.50 m/s) + (0.030 kg x 1.50 m/s) = 0.080 kg m/s

We also know that the final velocity of the three objects is 0.50 m/s in the x-direction and the total mass is 0.100 kg. So the total final momentum in the x-direction is:

[tex]Momentum_x = (mass_total x velocity_final_x)[/tex] = (0.100 kg x 0.50 m/s) = 0.050 kg m/s

Using the law of conservation of momentum, we can solve for the velocity of C in the x-direction:

0.080 kg m/s = [tex](mass_C x velocity_C_x) + 0.050 kg m/s velocity_C_x[/tex] = (0.080 kg m/s - 0.050 kg m/s) / 0.050 kg = 0.26 m/s

Part B,

we can do the same process in the y-direction. We know that the initial velocities of A and B are 0 m/s in the y-direction, and the total mass is 0.100 kg.

So the total initial momentum in the y-direction is:

[tex]Momentum_y = (mass_A x velocity_A_y) + (mass_B x velocity_B_y)[/tex]

= (0.020 kg x 0 m/s) + (0.030 kg x 0 m/s) = 0 kg m/s

We also know that the final velocity of the three objects is 0.50 m/s in the y-direction and the total mass is 0.100 kg.

So the total final momentum in the y-direction is:

[tex]Momentum_y = (mass_total x velocity_final_y)[/tex] = (0.100 kg x 0.50 m/s) = -0.050 kg m/s

Using the law of conservation of momentum, we can solve for the velocity of C in the y-direction:

0 kg m/s =[tex](mass_C x velocity_C_y)[/tex] + (-0.050 kg m/s)

[tex]velocity_C_y[/tex] = (-0.050 kg m/s) / 0.050 kg = -0.44 m/s

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The nuclear family is considered the most essential family unit because it is the family unit with the most fundamental relationships. that's why the Given statement is False.

In a nuclear family, parents and their children live in a household. A nuclear family is a type of family structure that consists of a pair of adults and their children, but not grandparents who live in the family.

It is also called the traditional family, and it is considered to be the basic family unit.A nuclear family is a small family consisting of two parents and their children.

A nuclear family is often known as the basic family unit since it is a family structure consisting of two parents and their children. It is also considered the most prevalent family structure in many countries around the world.

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Answer:

the power output of the car is 29.43 kW (rounded to two decimal places).

Explanation:

To find the power output of the car, we need to use the formula:

power = work / time

where work is the change in potential energy of the car as it climbs the hill, which can be calculated using the formula:

work = force x distance

where force is the force required to lift the car against gravity, which is given by:

force = mass x gravity

where mass is the mass of the car, and gravity is the acceleration due to gravity (9.81 m/s^2).

So, the force required to lift the car against gravity is:

force = 1000 kg x 9.81 m/s^2 = 9810 N

The distance the car travels up the hill is 30 m.

Therefore, the work done by the car is:

work = force x distance = 9810 N x 30 m = 294300 J

The time taken by the car to climb the hill is 10 s.

Therefore, the power output of the car is:

power = work / time = 294300 J / 10 s = 29430 W

Option C, Because of the wavelength of radio waves and other forms of electromagnetic radiation, diffraction is most likely to occur as the wave travels through a classroom doorway.

Diffraction is the bending of waves around barriers or through apertures that are equivalent to or smaller than the wavelength of the wave.

Because radio waves have longer wavelengths than visible light and X-rays, they are more likely to diffract while passing through a similar-sized aperture, such as a classroom doorway.

Because X-rays have considerably shorter wavelengths and visible light has wavelengths in between, diffraction is less likely to occur in this scenario for these forms of electromagnetic energy. As a result, option C is the right answer.

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The blocks accelerate at the same charge for the reason that they're linked. The acceleration is a value between zero and g.

Acceleration is a physical concept that refers to the rate of change of an object's velocity with respect to time. When an object's velocity changes, either by speeding up or slowing down, it is said to be accelerating.

Acceleration plays an important role in many aspects of physics, from the motion of celestial bodies to the behavior of particles in a particle accelerator.  The magnitude of acceleration is the rate at which an object's velocity changes, and it is measured in units of meters per second squared (m/s^2) in the International System of Units (SI). There are several factors that can cause an object to accelerate, such as a force acting on it, a change in its direction of motion, or a combination of both.

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False. E=hf, where h is Planck's constant, c is the speed of light, f is the frequency, and is the wavelength; and E=hc/, where E is directly proportional to frequency and inversely proportional to wavelength.

With respect to the wavelength of the radiation, photon energy is inversely proportional.

Two formulas can be used to determine a photon's energy: E = h f is a formula that can be used if the photon's frequency is known. This equation, sometimes known as Planck's equation, was created by Max Planck.

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Answer:B. Microwaves

Explanation:

Hope this helped you. Pls brainliest! :D

Answer:

Explanation:

We can calculate the change in the man's center of gravity by considering the initial and final positions of the center of gravity of his arms.

Assuming the man's arms are initially hanging down by his sides, the center of gravity of his arms is located at the midpoint of the cylinder, which is at a distance of L/2 = 79/2 = 39.5 cm from the shoulder joint.

When the man raises his arms straight up, the center of gravity of his arms is located at the top of the cylinder, which is at a distance of L = 79 cm from the shoulder joint.

The change in the man's center of gravity is therefore:

Δh = h_final - h_initial

= L - L/2

= 79 cm - 39.5 cm

= 39.5 cm

Therefore, the man raises his center of gravity by 39.5 cm when he raises both his arms from hanging down to straight up.

Biomass energy refers to energy that is derived from organic matter, such as wood, crop residues, and even municipal solid waste. This organic matter can be replenished through biogeochemical cycles.

Organic products, such as fruits, vegetables, meat, and dairy, are grown or raised without the use of synthetic chemicals, fertilizers, or hormones. Organic certification is granted by regulatory bodies that ensure that the products meet strict organic standards.

In addition to its benefits for the environment and personal health, organic farming and food production also promote animal welfare and sustainable agriculture practices. However, organic products may be more expensive than conventionally grown products due to the increased cost of production and certification.

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Explanation:

hope its help thank you

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The velocity, period, and total energy of a hydrogen-like atom with atomic number z can be calculated with the following formulas.

Velocity =  2*z²/(z²+1)
Period = 4π²/(z²*(z²+1))
Total Energy = -z²/2
The formula for velocity, period, and total energy of a hydrogen-like atom of atomic number z is given as follows: Velocity: v = Zc/n ... (1)Period: T = 2πa/v ... (2)

Total energy: E = -me^4z^2/8εo^2h^2n^2 ... (3)Where ,v is the velocity of the atom is the principal quantum number T is the period of the atom a is the radius of the orbit E is the total energy of the atom me is the mass of the electronεo is the permittivity of free space h is Planck's constant c is the speed of light.

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The bearing stress in the given screw is 3.32 N/mm².
The bearing stress for a screw with a mean diameter of 6 mm, a pitch of 1 mm, and 3 engaged threads carrying a load of 275 n is calculated using the formula:

Bearing Stress (σ) = (Load / (π * Mean Diameter * No. of Engaged Threads))
σ = (275 N / (π * 6 mm * 3))
σ = 23.31 MPa (megapascals)
The bearing stress in a screw with mean diameter 6 mm and pitch 1 mm that is carrying a load of 275 N can be calculated as follows:Given,Mean diameter, d = 6 mmPitch, p = 1 mmLoad, W = 275 NNumber of engaged threads, n = 3The formula to calculate the bearing stress is given by;`Bearing stress = W/(A * n)`Where A is the area of the threaded section of the screw. It is given by;`A = (π/4) * (d - 0.9382p)²

`Now, substitute the given values in the formula for A.`A = (π/4) * (6 - 0.9382 × 1)²`Solving the above equation, we get`A = 26.22 mm²`Now, substitute the values of A, W, and n in the formula for bearing stress.`Bearing stress = W/(A * n)``= 275/(26.22 × 3)``= 3.32 N/mm²`

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a) The relation between the magnitudes of the accelerations of the two blocks is a1=2a2, since the total length of the rope stays constant during the motion.

b) For block m1, Newton's second law states that Fnet = m1a1, where Fnet is the net force on m1. Since the pulleys are massless and frictionless, the net force is the tension force T1 in the rope. Therefore, T1 = m1a1.
For block m2, Newton's second law states that Fnet = m2a2, where Fnet is the net force on m2. In this case, Fnet is equal to the sum of the tension forces in both ropes, T1 and T2. Therefore, T1 + T2 = m2a2.
Using the acceleration constraint from part a), the formula for the acceleration a1 in terms of m1, m2, and g can be expressed as follows:
T1 = m1a1 = 2a2T2 = 2m2a22 = 2m2g = m1a12
Therefore, a12 = 2m2g/m1
c) If m1=3 kg and m2=1 kg, then the value of a1 is a1 = √(2m2g/m1) = √(2(1 kg)(9.8 m/s2)/(3 kg)) = 1.5 m/s2.

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Everything but blue & orange would now be present in the spectrum of light observed.

Spectrum refers to a range of different wavelengths of electromagnetic radiation. Electromagnetic radiation is a form of energy that travels through space and includes different types such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type of electromagnetic radiation has a different wavelength and frequency, and together they make up the electromagnetic spectrum.

The concept of spectrum is used in a variety of fields, including physics, astronomy, and telecommunications. The spectrum of electromagnetic radiation is essential for many technologies, such as radios and televisions, cell phones, and medical imaging devices, as they all rely on the transmission and reception of specific wavelengths of electromagnetic radiation.

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Complete Question: -

Imagine that the blue light and orange light from the source were blocked. What color(s) would now be present in the spectrum of light observed?

Answer:

Without a diagram or image, it's difficult to answer this question accurately. However, I can provide a general answer based on the information given.

a. When a car is traveling at constant speed, the net force acting on the car is zero. Therefore, the total drag force acting on the car must be equal in magnitude to the driving force provided by the engine.

b. i. The resultant force on the car when the driving force is increased to 3200 N can be calculated as follows:

Resultant force = Driving force - Drag force

Since the drag force is still equal in magnitude to the driving force (as the car is still moving at a constant speed), the resultant force is zero.

Resultant force = 3200 N - 3200 N = 0 N

ii. The equation connecting mass, force, and acceleration is:

Force = mass x acceleration

This can be rearranged to find acceleration:

Acceleration = Force / mass

iii. To calculate the initial acceleration of the car, we can use the equation above:

Acceleration = 3200 N / 800 kg = 4 m/s²

c. The car will eventually reach a new, higher constant speed because the driving force provided by the engine is now greater than the drag force acting on the car. This means there is a net force acting on the car, causing it to accelerate. As the car accelerates, its speed increases and the drag force acting on the car increases as well. Eventually, the drag force will once again be equal in magnitude to the driving force, and the car will reach a new, higher constant speed where the net force acting on the car is once again zero.

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Answers :-

The blanks for question 7 is as follows:-

1st row : Charge of the ion = +3

2nd row : Chemical symbol = I-

3rd row : Name of ion = Magnesium ion and type of ion = cation .

4th row : Chemical symbol = K+ , charge of the ion = +1 and type of ion = cation .

5th row : Name of ion = Nitride ion , charge of the ion = -3 , type of ion = anion .

and we are done!

The physical processes by which atoms rearrange during phase transformations in the solid state involve changes in the arrangement of the atoms in the lattice, which can be caused by changes in temperature, pressure, or both.

The physical processes by which atoms rearrange during phase transformations in the solid state involve changes in the arrangement of the atoms in the lattice.

This is typically done by changing the number of nearest neighbours of each atom or by introducing new lattice points in the solid structure. In some cases, atoms may even have to move from one position to another.

Common examples of phase transformations in the solid state include melting, recrystallization, and solidification.

Melting occurs when the thermal energy of the solid is increased and the atoms become mobile enough to break the bonds between them. This causes the solid to transition into a liquid phase.

Recrystallization occurs when the thermal energy of the solid is decreased, causing the atoms to return to their original positions and form a new, more ordered lattice.

Lastly, solidification is the reverse process of melting, where thermal energy is removed and the atoms return to their original positions in the lattice.

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