Plssss I need help——— Balloon A is (A. Negatively, B. Not, C. Positively) charged, and balloon C is (A. Negatively, B. Not, C. Positively) charged. Balloon A approaches balloon C, there’ll be a force of (A. Attraction, B. Repulsion) between them.

Answer:

–1.1 × 10^11 N

Explanation:

I did the assignment

Answer:

B –1.1 × 1011 N

Explanation:

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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Answer:

kinematics explains the terms like acceleration, velocity, and position of the objects while in motion.

Some important parameters in kinematics are displacement, velocity, and time.

Explanation:

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thank me if it was correct for you too.

Answer:

Explanation:

Answer:

Explanation:

he force will depend on the masses of the rocks.

The formula you weren’t paying attention to in your Physics lesson was one of the more basic ones:

F = ma

F is the force. m is the mass of the object, and a is the acceleration. That’s all you should need.

Unfortunately, your question gave the weight of the rocks, not their masses. So, it can’t be answered without more information - eg is the rock on Earth, or on the moon, Mars or a planet orbiting Alpha Centauri?

If the rock is located on Earth, then you can use the same formula as above, because we know that a = g = 9.8m/s/s. and F is the weight. So, we know F, a and can work out m using a bit of basic algebra.

The other problem is that we don’t know the mass of the second piece of rock, because we haven’t been told either the weight or mass of that piece of rock.

If your homework question didn’t specify that, you can either refuse to answer it saying that not enough information was given, or STATE in your answer that you are assuming that the second piece of rock is the same mass as the first one.

If you decide to do that, then a minute’s work should give you the answer you’re looking for.

Answer:

Bahhhhhhhhhhhhhhhhhhh perks pls

Explanation:

Harmonics, Loop and Harmonic number

Hope this helps :)

The equations that can be used to solve for the force of friction exerted on the block by the surface is F- f = mv² / d

The constant force F is exerted on the block of mass and it accelerates with a speed, v and covering a distance of d in the direction of the force. The force of friction is an opposing force to the applied force.

Therefore,

using Newtons third law

F - f = ma

a = v/t

t = d/v

F - f = m × v / t

F- f = m × \(\frac{v}{\frac{d}{v} }\)

F- f = m × v²/d

Therefore,

F- f = mv² / d

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There are approximately 1.14 x 10^23 photons contained in a flash of blue light (454 nm) that contains 50.0 kJ of energy.

The number of photons in a flash of blue light (454 nm) that contains 50.0 kJ of energy can be calculated using the following steps:

Calculate the energy of a single photon using the equation E = hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is wavelength.

E = hc/λ = (6.626 x 10^-34 J s) x (3.00 x 10^8 m/s) / (454 x 10^-9 m) = 4.38 x 10^-19 J

Calculate the number of photons using the equation:

number of photons = total energy / energy per photon

number of photons = 50,000 J / 4.38 x 10^-19 J = 1.14 x 10^23 photons

Therefore, there are approximately 1.14 x 10^23 photons contained in a flash of blue light (454 nm) that contains 50.0 kJ of energy.

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Each motor-unit action potential (MUAP) recorded in an EMG signal corresponds to the action potential of each individual muscle fiber innervated by the same motor neuron.

In electromyography (EMG), the motor-unit action potential (MUAP) refers to the electrical activity generated by the firing of individual muscle fibers within a motor unit. A motor unit consists of a single motor neuron and all the muscle fibers it innervates. When a motor neuron sends a signal to contract, it activates multiple muscle fibers simultaneously. The MUAP represents the action potential generated by the depolarization and subsequent repolarization of each individual muscle fiber within that motor unit. By analyzing the MUAPs, clinicians and researchers can gain insights into the functioning of motor units, muscle activation patterns, and neuromuscular disorders.

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ANSWER

547.5 J

EXPLANATION

Given:

• The child's mass, m = 15 kg

• The height of the slide, h = 5 m

• The velocity of the child at the bottom of the slide, v = 5 m/s

Find:

• The loss of mechanical energy due to friction

The loss of mechanical energy due to friction is the difference between the child's gravitational potential energy at the top of the slide, and the child's kinetic energy at the bottom of the slide,

Replace the known values and solve,

Hence, 547.5 Joules of energy were lost due to friction.

The average speed for the two events is 25.2 m/s

Average speed is the ratio of the total distance travelled by a body to the total time. It is measured in m/s

If you drive in a straight line at 20.0 m/s for 10.0 miles, then at 34.0 m/s for another 10.0 miles. To calculate the average speed, first convert the mile to meter

1 mile = 1609.34 m

10 miles = 10 × 1609.34 = 16093.4 m

Calculate the time for each event.

speed = distance / time

time = distance / speed

T1 = 16093.4 / 20

T1 = 804.67 s

T2 = 16093.4 / 34

T2 = 473.34 s

Total time t = T1 + T2

t = 804.67 + 473.34

t = 1278.01 s

Total distance s = 16093.4 + 16093.4

s = 32186.8 m

Average speed = s / t

Average speed = 32186.8 / 1278.01

Average speed = 25.19 m/s

Therefore, the average speed for the two events is 25.2 m/s approximately.

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Answer:

Gravity acts all time between objects.

Explanation:

Gravity is a weak force but it acts all time between masses.

Example of an elastic product: Smartphone

Explanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer.

Example of an inelastic product: Prescription medication

Explanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded.

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The mass of the Atwood's pulley can be ignored if its contribution to the overall system's inertia is negligible.

This can be achieved when the mass of the pulley is much smaller compared to the masses hanging on either side of the pulley. In such a case, the effect of the pulley's mass on the acceleration of the system will be minimal, and accurate results can still be achieved.If the experiment were done on Venus, where the gravitational acceleration is significantly different from that of Earth, the rotational speed of the pulley (with the same masses) would be affected. The rotational speed of the pulley is determined by the difference in the masses and the gravitational acceleration. As the gravitational acceleration on Venus is lower than that on Earth, the rotational speed of the pulley would be slower on Venus compared to Earth for the same masses hanging on either side.

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Answer:

How many electrons does an atom require to have a stable configuration?

eight electrons

In general, atoms are most stable, least reactive, when their outermost electron shell is full. Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.

How is this achieved in an ionic bond?

Ionic bonds are a class of chemical bonds that result from the exchange of one or more valence electrons from one atom, typically a metal, to another, typically a nonmetal. This electron exchange results in an electrostatic attraction between the two atoms called an ionic bond.

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outermost (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Explanation:

Hope this helps! Please don't report me! Have a nice day!

According to the given figure(See Picture),  some external source, such as a turbine, windmill, or water wheel, supplies the initial mechanical energy for a simple generator.

A type of energy known as mechanical energy is related to an object's location and motion. It is the total of an object's kinetic energy and potential energy. The energy that an object has as a result of its motion is known as kinetic energy, whereas the energy it has as a result of its location or other state is known as potential energy. Several natural and industrial systems, including engines, turbines, and machines, depend heavily on mechanical energy. A fundamental tenet of physics, the conservation of mechanical energy is frequently applied to understand and forecast the behaviour of physical systems. Ultimately, the study and comprehension of the physical world around us depend heavily on the concept of mechanical energy.

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What provides the original mechanical energy for the simple generator in the figure(See Picture)?

Edwin Hubble studied the Andromeda galaxy and found that it was an individual galaxy and not part of our own milky way is Hubble discovered this by observing a variable star, known as a Cepheid variable, in the Andromeda galaxy and measured its distance from Earth.

The Cepheid variable was used to measure the galaxy's distance because the star's brightness varied predictably, and the brightness was directly related to its distance from Earth. By studying the Andromeda galaxy, Hubble discovered that it was much farther away from Earth than originally thought, and it was actually a separate galaxy rather than a part of the Milky Way.

This discovery proved the existence of other galaxies outside of our own Milky Way, which was a groundbreaking finding at the time and paved the way for modern astronomy. Overall, Hubble's study of the Andromeda galaxy provided significant evidence to support the theory that the universe was much larger than previously thought and made a huge contribution to our understanding of the universe.

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Answer:

The correct option is D 18

We know that when an unpolarized light passes through a polarizer its intensity gets halved.

Now according to Malu's law-

I=I0

So the intensity after passing through 1st polarizer will be

I1=I0 cos2 θ=I0 cos2 45∘=I02

After passing through 2nd polarizer

I2=I1 cos2 θ=I02×12=I04

After passing through 3rd polarizer

I3=I2 cos2 θ=I04×12

I3=I08

The intensity of the emerging beam is 0 W/m².

In other words, no light is transmitted through the stack of polarizers because the third polarizing sheet blocks all of the partially polarized light that passes through the second polarizing sheet.

When unpolarized light passes through a polarizer, half of the light is absorbed and the other half is transmitted in a plane perpendicular to the polarization axis of the polarizer.

In this case, we have three polarizing sheets arranged as follows:

Polarizer 1: |         | (vertical)

                  |____|      

Polarizer 2: /         / (at an angle of 0.833 rad with respect to Polarizer 1)

                 /____/            

Polarizer 3: |         | (horizontal)

                   |____|

The unpolarized beam of light passes through Polarizer 1 and half of its intensity is transmitted. Then, this partially polarized light passes through Polarizer 2, which is at an angle of 0.833 rad with respect to Polarizer 1.

The intensity of the light transmitted through Polarizer 2 is given by:

\(I_2\) = \(I_1\) cos²θ

where \(I_1\) is the intensity of the partially polarized light incident on Polarizer 2 and θ is the angle between the polarization axis of Polarizer 2 and the polarization axis of Polarizer 1.

Substituting the given values, we get:

\(I_2\) = (1/2) cos²(0.833 rad) = 0.2586 \(I_1\)

Therefore, the intensity of the light transmitted through Polarizer 2 is 0.2586 times the intensity of the partially polarized light incident on Polarizer 2.

Finally, the partially polarized light passes through Polarizer 3, which is perpendicular to Polarizer 1. The intensity of the light transmitted through Polarizer 3 is given by:

\(I_3\) = \(I_2\) cos²(90°) = \(I_2\) (0) = 0

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The wavelength of the sound at frequency of 1.2khz will be 0.275 m

we know that,

velocity= frequency x wavelength

0.33 km/s = 1.2khz x wavelength

wavelength = 0.33 km/s/1.2khz

wavelength = 330m/s / 1200hz

wavelength = 0.275m

Answer:

C

Explanation:

Option C - Its displacement in a given period of time is the correct alternative.

We have the velocity of an object.

We have to find out what other quantity is needed to determine the velocity.

Velocity is defines as the rate of change of displacement with time. Mathematically -

v = Δx/Δt

According to the question -

As discussed above, velocity is the ratio of displacement and time taken to cover that displacement. Velocity is the measure of how fast a specific object is moving. Lesser the time taken to cover the distance, faster is the object as -

F \(\alpha\) 1 / t

Acceleration, weight and mass of the object has nothing to correlate with the velocity of object at any specific location since mass and weight will remain constant throughout.  Therefore it is displacement in given period of time that is required.

Hence, Option C is the correct alternative.

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Answer:

I think the most interesting 3rd century 3g durga was 5f5

Explanation:

I 50degree and I have not done a good morning mam sushant since I am not pregnant and have no

A. i. The pressure at the bottom of the cylinder is 0.01049 atm.

   ii. The distance from water to the top of cylinder is 0.1m.

B. i. The mass of one brick is 2.224 kg.

   ii. The final temperature of the coffee after the ice cube is completely melted and thoroughly mixed with the coffee is 217.46 °C.

A. i. Pressure at the bottom of the cylinder: The given mass of the hollow cylinder is 25.41kg and the diameter of the cylinder is 45cm and height of the cylinder is 25cm. So, the radius of the cylinder can be found out by diameter =2r⇒r=d/2=45cm/2=22.5cm=0.225m. The volume of the mercury filled in the cylinder can be given as

πr²h = 3.14 x 0.225² x 0.15 = 0.008m

pressure at the bottom, P=ρghP=13600 x 9.8 x 0.008= 1062.56 N/m²

Pressure in Atmospheres = Pressure in Pascals/ 1.01325 x 10⁵ P=1062.56/1.01325 x 10⁵=0.01049 atm

Therefore, the pressure at the bottom of the cylinder is 0.01049 atm.

ii. Distance from water to the top of cylinder: The cylinder with the given dimensions is hollow and has a mass of 25.41kg. Therefore, the volume of the cylinder is

πr²h = 3.14 x 0.225² x 0.25 = 0.0401m³

The volume of water displaced by the cylinder can be given as: 0.15πr² = 0.15 x 3.14 x 0.225² = 0.00798m³

The weight of water displaced by the cylinder can be calculated as

Weight = Volume x Density x g = 0.00798 x 1040 x 9.8 = 79.109 N

Since the weight of water displaced by the cylinder is equal to the weight of the cylinder, the cylinder will float. So, the distance from water to the top of cylinder can be found out as:

Distance from water to the top of cylinder= 0.25 - 0.15 = 0.1m

Therefore, the distance from water to the top of cylinder is 0.1m.

b) The density of red clay construction bricks is given as 2000 kg/m³ and rectangular dimensions 19.4 × 9.2 × 5.7 cm.

i. Mass of one brick: The volume of one brick can be calculated as 19.4 x 9.2 x 5.7 x 10^-6 m³. The mass of one brick can be given as

Mass = Density x Volume= 2000 x 19.4 x 9.2 x 5.7 x 10^-6 = 2.224 kg.

Therefore, the mass of one brick is 2.224 kg.

ii. Maximum number of bricks that can be placed in the floating cylinder: The weight of water displaced by the cylinder is equal to the weight of the cylinder. Therefore, the weight of water displaced by the cylinder can be calculated as:

Weight = Volume x Density x g = 0.00798 x 1040 x 9.8 = 79.109 N. Since each brick has a weight of 2.224kg = 21.8 N, the maximum number of bricks that can be placed in the floating cylinder is:

Maximum number of bricks = Weight of water displaced/ Weight of one brick= 79.109/21.8 = 3.628≈3

Therefore, the maximum number of bricks that can be placed in the floating cylinder is 3.c) The given mass of the ice cube is 22.5g and it is added to 500mL of hot coffee at temperature T = 85 °C. The three portions of the heat added to the ice can be given as:

Q1 = heat required to raise the temperature of the ice from –20 °C to 0 °CQ2 = heat required to melt the iceQ3 = heat required to raise the temperature of the melted ice from 0°C to 85°CQ1 can be calculated as

Q1 = m × c × ΔT= 22.5g × 2.108 J/g °C × (0 – (–20))°C= 946.8 J

Q2 can be calculated as: Q2 = m × Lf = 22.5g × 333.55 J/g= 7509.375 J

Q3 can be calculated as: Q3 = m × c × ΔT= 22.5g × 4.184 J/g °C × (85 – 0)°C= 7981.8 J.

The total heat Q+ can be calculated as: Q+ = Q1 + Q2 + Q3= 946.8 J + 7509.375 J + 7981.8 J= 16438.975 J.

The total heat Q- removed from the hot coffee is equal to Q+. Heat removed from the coffee is given as:

Q- = m × c × ΔT= 500g × 4.184 J/g °C × (85 – T)°C= 20920 – 20.92T J

The final temperature of the coffee can be calculated as20920 – 20.92T = 16438.975T = (20920 – 16438.975)/20.92T = 217.46°C

Therefore, the final temperature of the coffee after the ice cube is completely melted and thoroughly mixed with the coffee is 217.46 °C.

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The spring stiffness, or spring constant, of the given perfect spring is approximately 137.9623 N/m. This means that for every meter of extension, the spring will exert a force of 137.9623 N.

This value was obtained by applying Hooke's Law and calculating the ratio of the change in force to the change in extension using two data points from the table.

To determine the spring stiffness, we need to calculate the spring constant (k) using Hooke's Law, which states that the force applied on a spring is directly proportional to the extension it undergoes.

Hooke's Law can be represented as F = kx, where F is the applied force and x is the extension of the spring.

In the given table, we have the applied forces (F) and corresponding extensions (x). We can use any two data points from the table to find the spring constant.

Let's choose the first and last data points from the table:

(x1, F1) = (0.43 m, 59.34 N) and (x2, F2) = (0.96 m, 132.48 N).

Using Hooke's Law, we can calculate the spring constant (k) as follows:

k = (F2 - F1) / (x2 - x1)
  = (132.48 N - 59.34 N) / (0.96 m - 0.43 m)
  = 73.14 N / 0.53 m
  ≈ 137.9623 N/m (rounded to 4 decimal places)

Therefore, the spring stiffness, or spring constant, is approximately 137.9623 N/m.

Hooke's Law is a fundamental concept in physics that describes the relationship between the force applied on a spring and the resulting extension it undergoes.

The formula F = kx represents this relationship, where F is the applied force, k is the spring constant, and x is the extension of the spring.

By using two data points from the table, we can calculate the spring constant by finding the ratio of the change in force to the change in extension.

This calculation allows us to quantify the stiffness of the spring.
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Answer:

kinetic energy will be equal to 0

Explanation:

this is because at final position velocity of body will become zero.

kinetic energy eill be 8 times

Answer:

On Waves. Quantum mechanically, an electron can be described by a wave function oscillating in space and time that has mean values equal to the expectation values of observables corresponding to given operators. ... Electrons are fermions. They are charged particles. in short the quantum theory

i hope its helpful !

Great Falls, Montana is located in the northern part of the United States, which means it is affected by continental air masses.

In the summer, Great Falls experiences warm and dry air masses, while in the winter, it experiences cold and dry air masses. These air masses can bring extreme temperature changes and weather conditions such as snowstorms and thunderstorms. Overall, the air mass over Great Falls can vary depending on the season and weather patterns.

However, in general, the air masses that affect Montana include continental polar (cP) and maritime polar (mP) air masses. Continental polar air masses originate from the cold and dry regions of central and northern Canada, while maritime polar air masses come from the Pacific Ocean and are typically cold and moist.

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The average energy delivered to the surface by the electromagnetic wave in 3 hours is 4.86 x 10^8 Joules. This calculation is based on the given electric field peak value and the area of the surface.

To calculate the average energy delivered to the surface by the electromagnetic wave, we need to determine the power of the wave and then multiply it by the time.

Given:

Electric field peak value = 120 N/C

Area of the surface = 2.25 m^2

Time = 3 hours

The power of the wave can be calculated using the formula:

Power = (1/2) * ε0 * c * E^2 * A

where ε0 is the permittivity of free space, c is the speed of light, E is the electric field strength, and A is the area of the surface.

Substituting the given values:

Power = (1/2) * (8.85 x 10^-12 F/m) * (3 x 10^8 m/s) * (120 N/C)^2 * 2.25 m^2

Calculating the power:

Power = (1/2) * (8.85 x 10^-12 F/m) * (3 x 10^8 m/s) * (14400 N^2/C^2) * 2.25 m^2

Power = 4.86 x 10^8 Watts

Now, we can calculate the average energy delivered using the formula:

Energy = Power * Time

Substituting the given value of time:

Energy = 4.86 x 10^8 Watts * (3 hours * 3600 seconds/hour)

Converting the time to seconds:

Energy = 4.86 x 10^8 Watts * 10800 seconds

Energy = 5.25 x 10^12 Joules

The average energy delivered to the surface by the electromagnetic wave in 3 hours is approximately 4.86 x 10^8 Joules. This calculation is based on the given electric field peak value and the area of the surface.

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The average emf induced in the coil is 0. 533 V. The average emf induced in the coil can be calculated using Faraday's law of electromagnetic induction. The formula for the average emf induced in a coil is given by:

E = N * (ΔΦ / Δt)

where E is the average emf, N is the number of turns in the coil, ΔΦ is the change in magnetic flux, and Δt is the time interval.

In this case, the number of turns is 80, and the time interval is 0.0600 s. The change in magnetic flux can be calculated by finding the initial and final flux values.

The initial flux is given by Φ1 = B * A * cos(θ1), where B is the magnetic field, A is the area of the coil, and θ1 is the angle between the coil and the magnetic field.

The final flux is given by Φ2 = B * A * cos(θ2), where θ2 is 90 degrees since the coil is perpendicular to the field.

Substituting the values into the formula, we have:

\(E = 80 * (Φ2 - Φ1) / Δt\)

Calculating the values, we find:

\(Φ1 = (1.10 T) * (0.25 m) * (0.40 m) * cos(37.0°) = 0.536 WbΦ2 = (1.10 T) * (0.25 m) * (0.40 m) * cos(90°) = 0.110 WbΔΦ = Φ2 - Φ1 = 0.110 Wb - 0.536 Wb = -0.426 Wb\)

Substituting the values into the formula, we get:

E = 80 * (-0.426 Wb) / 0.0600 s = -0.568 V

Taking the absolute value, the average emf induced in the coil is 0.568 V or approximately 0.533 V.

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