Which of the following is NOT true about the relationship between electricity and magnetism?
A O All magnets are surrounded by an electric field.
B.
Generators use magnets to induce an electric current.
Motors use electric currents to generate an electric field.
D. A magnetic field can be used to generate an electric current.

To find the velocity of the electron when it reaches a point 10 cm from q2, we can use the principle of conservation of energy.

The electric potential energy between two charges is given by the equation:

PE = k * (|q1*q2| / r)

Where:

PE is the electric potential energy

k is the Coulomb's constant (8.99 × 10^9 N·m^2/C^2)

q1 and q2 are the charges

r is the distance between the charges

Given:

q1 = 2.5 × 10^-10 C

q2 = 5 × 10^-10 C

r = 1 m

The electric potential energy when the electron is midway between the charges (r = 0.5 m) is:

PE_initial = k * (|q1*q2| / r_initial)

          = (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.5 m)

Now, let's calculate the electric potential energy when the electron is at a point 10 cm (0.1 m) from q2:

PE_final = k * (|q1*q2| / r_final)

        = (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.1 m)

According to the conservation of energy, the change in electric potential energy is equal to the change in kinetic energy:

ΔPE = ΔKE

PE_final - PE_initial = (1/2) * m * v^2

We know the electron's mass is approximately 9.10938356 × 10^-31 kg.

Rearranging the equation to solve for the velocity (v):

v = √((2 * (PE_final - PE_initial)) / m)

Substituting the given values and calculating:

v = √((2 * (PE_final - PE_initial)) / m)

  = √((2 * ((8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.1 m)) - (8.99 × 10^9 N·m^2/C^2) * (|(2.5 × 10^-10 C)*(5 × 10^-10 C)| / 0.5 m))) / (9.10938356 × 10^-31 kg)

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Answer:

The first law: the law of Inertia.

Explanation:

Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Answer:

1st, 2nd, & 3rd law

Explanation:

there is no 5th/4th law ppl

I did this question and it says SELECT 3 OPTIONS not 1 (This answer isn’t meant to be rude but just stating what the question says.)

Answer:

cities grow all around

making bunches of funny sounds

Explanation:

The time taken for the fridge to cool is  571 seconds.

To calculate the time taken for the fridge to cool, we need to determine the amount of heat that must be removed from the air in the fridge to cool it from room temperature to 5.00 degrees Celsius.

First, we need to calculate the mass of air in the fridge. The density of air is given as 1.29 kg/m^3, so the mass of air in the fridge is:

mass = density x volume

mass = 1.29 x  0.277

mass = 0.35673 kg

The specific heat capacity of air is given as 1.0 * 10^3 J/kgK, so the initial internal energy of the air in the fridge is:

U = mass x specific heat capacity x temperature

U = 0.35673 x 1.0 x 10^3 x (19.5 + 273.15)

U = 1.06 x 10^5 J

Assuming the initial temperature of the shelves is the same as the air in the fridge, the initial internal energy of the shelves is:

U_shelves = mass_shelves x specific heat capacity x temperature

= 0.595 x 2.30 x 10^3 x (19.5 + 273.15)

= 3.67 x 10^5 J

The total initial internal energy of the fridge is therefore:

U_total = U + U_shelves = 1.06 * 10^5 + 3.67 x 10^5

= 4.73 x10^5 J

To cool the air in the fridge to 5.00 degrees Celsius, we need to remove heat from the air. The amount of heat removed can be calculated using the formula:

Q = mass x specific heat capacity x Δ temperature

Q = 0.35673 x  1.0 x  10^3 x (5.00 - 19.5)

Q = -5.88 x 10^3 J

The negative sign indicates that heat is being removed from the air.

Finally, we can calculate the time taken to remove this amount of heat using the power of the fridge, which is given as 10.3 W:

t = Q / P = (-5.88 x 10^3) / 10.3 = -570.9 seconds

The negative sign here indicates that the time taken is actually 570.9 seconds longer than the time taken to remove 5.88 kJ of heat at a constant power of 10.3 W. However, since time cannot be negative, we can take the absolute value of the time taken to get:

t = 571 seconds (to the nearest second)

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The false statement is B) Homolytic bond cleavage yields neutral radicals in which each atom gains one electron.

In homolytic bond cleavage, each atom retains one electron from the shared pair of electrons, resulting in the formation of two neutral radicals, where each atom retains its original number of electrons.

No atoms gain or lose electrons in this process.

In a homolytic bond cleavage, a covalent bond is broken, and the shared pair of electrons is split equally between the two atoms involved in the bond.

This results in the formation of two neutral radicals, with each atom retaining one of the electrons from the shared pair.

A radical is a chemical species characterized by the presence of an electron that is unpaired, meaning it does not have a partner electron with which it forms a complete pair. When a covalent bond is homolytically cleaved, each atom involved in the bond gains one electron, resulting in the formation of two radicals.

These radicals are highly reactive due to the presence of the unpaired electron, which makes them prone to participate in further chemical reactions.

It's important to note that in homolytic bond cleavage, there is no transfer of electrons from one atom to another.

Instead, the bond is broken in a way that allows each atom to retain one of the electrons, leading to the formation of two neutral radicals.

Therefore, statement B, which suggests that each atom gains one electron, is false.

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Answer:

b

Explanation:

Answer:

B. Vastus Lateralis

Explanation:

The vastus lateralis muscle is located on the side of the thigh. This muscle is the largest of the quadriceps group.

What is average speed?

Average velocity is outlined because the amendment in position or displacement (∆x) divided by the time intervals (∆t) within which the displacement occurs.

The average velocity will be positive or negative relying upon the sign of the displacement. The SI unit of average velocity is meters per second (m/s or ms-1).

For a suction velocity of Vw = 0.15 m/s

Cylindrical suction expanse.

Aw = 2π (0.04) (1.2) = 0.30 lbm2

Q1 = Qw+Q1

(12* π * (0.08)2 / 4 = (0.15)(0.30) + V2 π

(0.08)2 / 4

V2 = 3 m/s

Hence, the exit velocity is Vw = 0.15 m/s

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If a new "minor planet" were to be found in a circular orbit with a radius of 13 AU, 47 years would be its orbital period.

The amount of time it takes for an astronomical object to complete one orbit around another object is known as the orbital period (also called the revolution period). It typically refers to planets or asteroids that orbit the Sun, moons that orbit planets, exoplanets that orbit other stars, and binary stars in astronomy.

The relationship between an object's average distance from its object of orbit and its period is depicted by Kepler's third law. In its most basic form, this can be applied to anything naturally orbiting around other things. Formula: Where: P2=ka3 The orbit's time-based period is called P.

A year is a time it takes for a planet to circle the Sun once, which for Earth is just over 365 days.

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Answer:

Vf = final velocity = 1.96 [m/s]

Explanation:

To solve this problem we must use the following equation of kinematics.

\(v_{f}^{2}=v_{o}^{2}-2*g*x\)

where:

Vf = final velocity [m/s]

Vo = initial velocity = 9.98 [m/s]

g = gravity acceleration = 9.81 [m/s²]

x = vertical distance [m]

\(v_{f}^{2}=(9.98)^{2}-2*9.81*4.88\\v_{f}^{2} = 99.6-95.74\\v_{f}=\sqrt{3.8544}\\v_{f}=1.96[m/s]\)

Note: The negative sign of the gravity acceleration means that the gravity acceleration is pointing in the opposite direction of the movement.

Answer:  D.) e-mail is saved on the server that transfers it

Explanation:

D. E-mail is saved on the server that transfers it is the right answer

Email (Email) is a computerized application for exchanging messages between users. The global email network enables rapid exchange of email messages. Email is an electronic version of a letter, but it has advantages in terms of topicality and flexibility.

All emails in all inboxes around the world are stored on the server. An incredible amount of data requires a huge server farm. This is a huge center with millions of computers that store and send information.

A mail server (or email server) is a computer system that sends and receives emails. Web and mail servers are often integrated on a single machine.

E-mail is usually a poor choice for the distribution of sensitive electronic files because E-mail is saved on the server that transfers it

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The answers to the given questions are as follows:

a) The Binding Energy per nucleon of Technetium-98 is 8.009 × 10⁻¹³ J/nucleon

b)  The Binding Energy per nucleon of Carbon-12 is 7.766 × 10⁻¹⁰ J/nucleon

c) Technetium-98 is more stable than Carbon-12 because it has a greater binding energy per nucleon.

The binding energy per nucleon can be defined as the amount of energy required to break apart an atomic nucleus completely. It is typically expressed in MeV per nucleon.

The binding energy per nucleon is a measure of the stability of the nucleus. If it is negative, the nucleus is unstable and will tend to decay. If it is positive, the nucleus is stable, and if it is zero, it is marginally stable. Binding energy per nucleon is calculated by using the following formula:

Binding energy = [(Number of protons × Mass of proton) + (Number of neutrons × Mass of neutron) - Mass of the nucleus] × c²

Where,

c is the speed of light (3 × 10⁸ m/s)

To calculate the binding energy per nucleon  we will need to use the given data:

The mass of the proton = 1.007276 u

The mass of the neutron = 1.008665 u

a) Binding Energy per nucleon of Technetium-98:

Mass of Technetium-98 nucleus= 97.907216 amu

                                                    = (97.907216 u) × (1.66054 × 10⁻²⁷ kg/u)

                                                   = 1.62699 × 10⁻²⁵ kg

Number of protons = 43 (as Technetium has atomic number 43)

Number of neutrons = 98 - 43

                                 = 55

Binding energy = [(43 × 1.007276 u) + (55 × 1.008665 u) - 97.907216 u] × (1.66054 × 10⁻²⁷ kg/u) × (3 × 10⁸ m/s)²

                         = 7.861 × 10⁻¹² J

The mass of one nucleon = mass of the nucleus/number of nucleons = 1.62699 × 10⁻²⁵ kg/98 nucleons

                                           = 1.658 × 10⁻²⁷ kg/nucleon

The Binding energy per nucleon= (7.861 × 10⁻¹² J)/98

                                                     = 8.009 × 10⁻¹³ J/nucleon

Therefore, the Binding Energy per nucleon of Technetium-98 is 8.009 × 10⁻¹³ J/nucleon

b) Binding energy per nucleon of Carbon-12:

Mass of Carbon-12 nucleus = 12.000 amu

                                             = (12.000 u) × (1.66054 × 10⁻²⁷ kg/u)

                                            = 1.993 × 10⁻²⁶ kg

Number of protons = 6 (as Carbon has atomic number 6)

Number of neutrons = 12 - 6

                                 = 6

Binding energy =  [(6 × 1.007276 u) + (6 × 1.008665 u) - 12.000 u] × (1.66054 × 10⁻²⁷ kg/u) × (3 × 10⁸ m/s)²

                          = 9.319 × 10⁻¹⁰ J

The mass of one nucleon = mass of the nucleus/number of nucleons

                                          = 1.993 × 10⁻²⁶ kg/12 nucleons

                                          = 1.661 × 10⁻²⁷ kg/nucleon

Binding energy per nucleon= (9.319 × 10⁻¹⁰ J)/12

                                             = 7.766 × 10⁻¹⁰ J/nucleon

Therefore, the Binding Energy per nucleon of Carbon-12 is 7.766 × 10⁻¹⁰ J/nucleon

c) Technetium-98 has a greater binding energy per nucleon than Carbon-12. Technetium-98 has 8.009 × 10⁻¹³ J/nucleon, while Carbon-12 has 7.766 × 10⁻¹⁰ J/nucleon. The higher the binding energy per nucleon, the greater the stability of the nucleus. Technetium-98 is more stable than Carbon-12 because it has a greater binding energy per nucleon.

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Answer:

A.spontaneous generation

Both the woofer and the tweeter would need to generate a larger displacement amplitude in order to produce the same sound pressure level in the room.  

The tweeter in a speaker system delivers as much power at 5kHz as the woofer does at 50Hz. In order to determine which speaker must generate a larger displacement amplitude, we need to consider the frequency response of each driver and the volume of the room.

Assuming that the room is a typical living room with a volume of around 100 cubic meters, we can calculate the approximate displacement amplitude required to produce a given sound pressure level (SPL) in the room. According to the inverse square law, the sound pressure level decreases by 6 dB for every doubling of the distance from the source. Therefore, to produce the same SPL in the room, the woofer and the tweeter would need to have roughly equal sound pressure levels at their respective frequencies.

Assuming that the woofer has a sound pressure level of 100 dB at 50Hz and the tweeter has a sound pressure level of 100 dB at 5kHz, we can calculate the required displacement amplitude for each driver using the following formula:

Displacement amplitude = √(2 * P / A)

where P is the sound pressure level, A is the area of the driver's cone, and √2 is a constant. Substituting the given values, we get:

Displacement amplitude = √(2 * 100 dB / A)

where A is the area of the driver's cone.

For the woofer, the area of the cone is typically on the order of a few square centimeters, so the required displacement amplitude would be on the order of millimeters.

For the tweeter, the area of the cone is typically on the order of a few square centimeters, so the required displacement amplitude would also be on the order of millimeters.

Therefore, both the woofer and the tweeter would need to generate a larger displacement amplitude in order to produce the same sound pressure level in the room.  

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The new time it takes for a wave pulse to travel between the ends of the spring is 2.0 s.

The question has to do with period of a stretched spring.

The frequency of a stretched spring is given by f = 1/2L√(T/μ) where

We then find the period

The period of a stretched spring T = 1/f

T = 2L√(μ/T)

We know that the time it takes the wave pulse to travel is the period, T = 1/f

So, T = 2L√(μ/T)

Since T and μ are constant, we have that

T ∝ L

So, T₂/T₁ = L₂/L₁ where

Making T₂ subject of the formula, we have

T₂ = (L₂/L₁)T₁

Substituting the values of the variables into the equation, we have

T₂ = (L₂/L₁)T₁

T₂ = (20 m/10 m)1.0 s

T₂ = (2)1.0 s

T₂ = 2.0 s

So, the new time it takes for a wave pulse to travel between the ends of the spring is 2.0 s.

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The vertical reaction of the space craft on the astronaut is 5mg.

The vertical reaction of the space craft on the astronaut is calculated by applying Newton's second law of motion as shown below.

F = mg

where;

The vertical reaction of the space craft on the astronaut is calculated as;

F = m x 5g

F = 5mg

Thus, the vertical reaction of the space craft on the astronaut is equal to the weight of the astronaut exerted downwards.

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Energy is transferred to the charge is 120J

What is energy?

Energy is a general term that we use frequently in our daily lives. Although the term "energy" is frequently misused, it has a specific physical meaning. In physics, energy is defined as something's ability to accomplish work. Energy can take various forms. All energy is either kinetic or potential. Let us take a closer look at what energy is and the many sorts of energy in this post.

On Earth, there are various types of energy. On Earth, the sun is considered the elemental form of energy. Energy is a quantifiable property in physics that can be transferred from an item to perform work. As a result, we can define energy as the ability to perform any type of physical activity.

According to the laws of energy conservation, "energy cannot be generated or destroyed; it can only be transformed from one form to another." Joule is the SI unit of energy. One of the fundamental rules of physics is the law of energy conservation. It regulates the movements of individual atoms in a chemical process at the microscopic level. According to the rule of conservation of energy, "the entire energy of the system is conserved in a closed system, i.e., a system that is separated from its surroundings." Even when energy transformation happens, the overall energy in a system is conserved, according to the law. Energy can't be created or destroyed.

E = Q X V

E=10X12

E=120J

Therefore, energy is transferred to the charge is 120J

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One of the main reasons why the media used propaganda in America during World War II was to create a sense of unity and support for the war effort.

Propaganda was used to promote patriotism and encourage citizens to make sacrifices for the greater good. It was also used to demonize the enemy, particularly the Germans and the Japanese, and portray them as a threat to American values and way of life. This helped to boost morale and create a sense of determination among the American people. Additionally, propaganda was used to recruit soldiers, promote war bonds, and encourage women to join the workforce. Overall, propaganda played a crucial role in shaping public opinion during the war and rallying support for the American cause.

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Answer:

0.407 kg

Explanation:

Given :

Coefficient of static friction, µs = 0.276

Force, F = 1.1 N

Using the relation :

μ = F/N

N = normal reaction ; N = mg

μ = F / mg

g = acceleration due to gravity = 9.8 m/s²

0.276 = 1.1 / m * 9.8

0.276 = 1.1 / 9.8m

0.276 * 9.8m = 1.1

2.7048m = 1.1

m = 1.1 / 2.7048

m = 0.4066844

Mass = 0.407 kg

Answer:

No.

Explanation:

The cut cucumber is still a cucumber.

Answer:

Nope.

Explanation:

Chemical change is transforming the cucumber into a pickle. However, you need vinegar, so it isn't a full change.

Therefore, Mr. Mann would not be right either way, because all he did was cut a cucumber, and he should probably get some help with all this "chemical change".

Explanation:

It is given that,

Height of the cliff is 100 m

Its horizontal velocity is 2 m/s

The attached figure shows the sketch of the cliff and the boulder. It will go in the form of parabola. Its trajectory is parabolic in nature. The horizontal distance is called the range of the parabola.

Answer:

The mass of the metal is 2.7 Kg.

Explanation:

As we know the mass of an object is:

m = ρ * v .........(i)

where ρ is the density of the metal cube, &

v is the volume of the cube

Now as per the question:

Density of metal cube, ρ = 2700 kg/m³

Edge Length, l = 10 cm

∵ 1 m = 100 cm

∴ edge length, l = 0.1 m

∴ Volume, v = (l)³ = (0.1)³ = 0.001 m³

Now putting all the values in equation (i), we get

m = 2700 * 0.001 kg

m = 2.7 kg

∴ A metal cube of density 2700 kg/m³ and edge length 10 cm has a mass of 2.7 kg.

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An ideal gas is compressed isothermally to one-fourth of its initial volume. The resulting pressure will is 4 times the initial pressure.

The equation of state for ideal gases is described below:

P.V. = n. R.T.     .........................(1)

Where:

P- Pressure.

V- Volume.

n- Molar quantity, in moles.

R- Ideal gas constant.

T- Temperature

Given that ideal gas is compressed isothermally, this is, temperature remains constant, pressure is increased and volume is decreased, then we can simplify (1) into the following relationship:

P1 V1= P2 V2

If we know that V2/V1 = 1/4 , then the resulting pressure of the system is:

P2 = P1 (V1/V2)

P2 = 4 P1

The resulting pressure is 4 times the initial pressure.

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When the puck has descended to a height of R/2, it no longer makes touch with the sphere.

To solve this problem, we can use the conservation of mechanical energy. Initially, the mass is at rest and has only potential energy, which is given by mgh, where m is the mass of the puck, g is the acceleration due to gravity, and h is the height of the puck above the ground. When the puck slides down the sphere, it loses potential energy and gains kinetic energy, which is given by \((\frac{1}{2}mv^2)\), where v is the velocity of the puck. However, as the puck slides down the sphere, it also experiences a normal force from the sphere, which reduces the force of gravity and affects the speed of the puck.

Let's start by finding the normal force on the puck. At the top of the sphere, the normal force is equal to the weight of the puck, which is mg. As the puck slides down the sphere, the normal force decreases until it reaches zero when the puck loses contact with the sphere. At this point, the gravitational force is equal to the centrifugal force, which is mv^2/R, where R is the radius of the sphere.

Setting these forces equal, we get:

\(mg = \frac{mv^2}{R}\)

Simplifying, we get:

\(v^2 = gR\)

Now we can use conservation of mechanical energy to find the height at which the puck loses contact with the sphere. At this point, all the potential energy has been converted into kinetic energy, so we have:

\(mgh = (\frac{1}{2})mv^2\)

Substituting \(v^2 = gR\), we get:

\(h = R(1 - \frac{1}{2}) = \frac{R}{2}\)

Therefore, the puck loses contact with the sphere when it has fallen to a height of R/2.

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If a standardized measuring system were not established, several problems could arise such as Lack of uniformity, Inefficiency and errors, Safety concerns and Economic impact.

Lack of uniformity: Without a standardized system, different regions or communities might develop their own measurement units, leading to confusion and inconsistency in communication and trade. It would be challenging to compare and reconcile measurements across different contexts.

Inefficiency and errors: A lack of standardized measurements could result in inefficiency in various sectors, such as construction, engineering, and manufacturing. Precision and accuracy would be compromised, leading to errors in calculations, designs, and product quality.

Safety concerns: Standardized measurements play a crucial role in ensuring safety, particularly in areas like medicine, transportation, and infrastructure. Without a common system, it would be difficult to establish safety standards, monitor compliance, and ensure uniformity in critical aspects like dosage, weight limits, and structural integrity.

Economic impact: Inconsistent measurement systems would hinder international trade and commerce. Harmonized measurements facilitate smooth transactions, accurate pricing, and quality control, leading to a stable and efficient economy. Without a standardized system, business operations and global collaborations would be significantly hindered.

In conclusion, a lack of a standardized measuring system would result in confusion, inefficiency, safety concerns, and economic setbacks, emphasizing the importance of establishing and adhering to universally accepted measurements.

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Answer:

.04 kg m/s

Explanation:

Momentum is simply mass multiplied by velocity given by p = mv. You can consider momentum as mass in motion.

Before the collision, the data given for the toy train:

v = 0.5m/s

m = 75g

We need to convert grams into the SI unit of mass, kg.

75g / 1000g * 1kg = 0.075kg

Using p = mv, we can determine:

p = 0.075kg * 0.5m/s = 0.0375 kg m/s

Rounding to the value of 1 sig-fig, it comes out to be 0.04 kg m/s.

Answer:

emission of radiation

Explanation: