Which of the following should not be used as a primary key in a table?.

This question involves the concepts of induced emf and magnetic field.

The wire has to move at a speed of "20 m/s".

The emf induced in a current carrying conductor when it passes through a magnetic field is given by the following formula:

\(E = vBl\\\\v=\frac{E}{Bl}\)

where,

Therefore,

\(v=\frac{10\ volts}{(2.5\ T)(0.2\ m)}\)

v = 20 m/s

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Explanation:

Magnetism is a class of physical attributes that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a Magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism.

Explanation:

Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. . Their movement generates an electric current and causes each electron to act like a microscopic magnet.

There are six basic types of magnetization: (1) diamagnetism, (2) paramagnetism, (3) ferromagnetism, (4) antiferromagnetism, (5) ferrimagnetism, and (6) superparamagnetism. Diamagnetism arises from the orbiting electrons surrounding each atomic nucleus..

Answer:

1.27551m

Explanation:

This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.

Thus, we get:

\(KE_{initial} + PE_{initial} = KE_{final} + PE_{final}\)

We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using \(\frac{1}{2}mv^2\)

One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.

\(KE_{initial} = PE_{final}\)

Plugging in:

\(\frac{1}{2}*30*5^2 = 30*9.8*h\)

Solving for h, we get 1.27551m

Answer:

* viajan a través del aire, liquido o solido

*Moverse en la misma dirección que el flujo de energía

Explanation:

En el análisis de ondas existen dos tipo fundamentales: Transversales y longitudinales.

La ondas transversales las oscilación de la partícula es perpendicular al movimiento de la misma.

En la onda longitudinal el movimiento de la partícula es en la misma dirección que el movimiento de la onda, por esta razón están ondas se llaman ondas de compresión.

En base a las definiciones iniciales las frases correctas son:

* viajan a través del aire, liquido o solido

*Moverse en la misma dirección que el flujo de energía

Answer:

Cause molecules to vibrate

Travel through air, liquid, or solid

Move in the same direction as energy flow

Explanation:

Answer: The binary number 11011 is 27 as a decimal number

Explanation:

The speed and time have a linear relationship. It is independent of mass. The upper limit is a)Mg/c and b)gt.

What exactly does acceleration mean?

A moving material experiences acceleration when its speed and trajectory vary over time. When anything moves quicker or longer, it is said to have been accelerated. Rotation on a circle accelerated despite the same speed since this heading is always changing.

What causes a speedup?

An object's motion is influenced by a net force; the larger the net force, the greater the acceleration. Greater net pressures are needed for more massive things to accelerate at the same rate as less massive things.

Briefing:

a) lim t-->∞  v = mg/c

 mg/c is the limit

2)It is the rate at which the item gets closer as time passes.

b) lim c-->0^(+)   v = gt.

 gt is the limit

3)The speed and time have a linear relationship. It is independent of mass. Since mass has no bearing on acceleration, an item will fall faster the longer it is in free fall.

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Take into account that the vertical final velocity of the projectile is given by:

Now, consider that at the peak of the trajectory, the vertical final velocity is zero. Moreover:

Then, by solving for y into the equation for vy^2, you obtain:

where g = 9.8m/s^2 is the gravitational acceleration constant.

By using the given values for the angle and vo you obtain for the height of the peak y:

Hence, the height of the peak of the projectil trajectory is approximately 40.36 m

Esteem needs are not related to basic needs, such as food, water, and shelter, but they are higher needs that must be satisfied. Therefore, the right answer is "None of these is correct basic needs."

Esteem needs are concerned with people's self-image and how they are viewed by others. Esteem needs involve feeling accomplished, respected, and acknowledged. Esteem needs are split into two types, inner and external esteem.Inner esteem is determined by self-esteem, which is how a person regards themselves. Inner esteem is related to a person's sense of worth and value.

It is a mental state in which a person feels good about themselves and their abilities. To have a positive sense of self-esteem, people must feel valued and respected for who they are. It aids in the development of self-confidence and self-worth. It is the starting point for creating meaningful friendships and relationships.External esteem, on the other hand, is the perception of the individual by others.

When we say "esteem" in a social context, we usually mean what others think of us. Esteem needs are not related to basic needs, such as food, water, and shelter, but they are higher needs that must be satisfied. Therefore, the right answer is "None of these is correct basic needs."

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the characteristics of the a 10 L ideal gas vessel filled with it at a pressure of 10 atm and temperature of 300 K. any desired changes in the vessel's volume or pressure. 30L of liquid will be produced at constant pressure when the temperature is 200 k.

That amount of force delivered perpendicularly to an object's surface in relation to its area is known as pressure. Pressure is a force-area relationship; pressure = force area. Pascal is the SI pressure measurement (pa).

The formula for calculating pressure is P = F / A, or force for unit of the surface area. The SI unit in measuring pressure is the pascal, and the sign for pressure in physical science is p. (symbol: Pa). One Newton per sq.m of force exerted perpendicularly on a surface is equal to one pascal.

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Answer:

finding the volume of an irregular shape

Freefall is the state of a body that moves freely in any direction in the presence of gravity. The window is 15.01 meters above the ground.

According to free fall,

vf = g * t

here Vf = 17.2 m/s

g = 9.8 m/s^2

then t = vf/ g = 17.2/9.8 =1.75 sec

According to free fall Equation,

Distance d = 1/2 g * t^2

d= 1/2 *9.8 * 1.75^2= 15.01 m

Window is located 15.01 m height from the Ground.

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To find the distance between the charge and the source of the electric field, we can use the formula F = qEd, where F represents the force, q is the charge, E is the electric field strength, and d is the distance.

Given:

Charge \((q) = 8.3 \times 10^{(-5)} C\)

Electric field strength \((E) = 5.7 \times 10^5 \frac{N}{C}\)

Electric potential energy (U) = 85 J

The electric potential energy (U) is related to the force (F) by the equation U = Fd. Since the electric potential energy is given as 85 J, we can set up the equation as follows:

U = Fd

85 J = qEd

Substituting the values we have:

\(85 J = (8.3 \times 10^{(-5)} C)(5.7 \times 10^5 \frac{N}{C} )d\)

We can simplify this equation by canceling out the units:

\(85 = (8.3 \times 10^{(-5)})(5.7 \times 10^5)d\)

85 = 47.31d

To solve for d, we divide both sides of the equation by 47.31:

d = \(\frac{85}{47.31}\)

d ≈ 1.8 meters

Therefore, the distance between the charge and the source of the electric field is approximately 1.8 meters when rounded to the nearest tenth.

It's important to note that the calculation assumes a linear relationship between electric potential energy and distance. In reality, electric fields can be more complex, and additional factors may influence the relationship between potential energy and distance. However, for the purposes of this calculation, we are considering a simplified scenario based on the given information and formula.

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The cerebellum is an important part of the brain that performs several vital functions. These include:

1. Smooth and coordinate skilled muscle activity: The cerebellum processes information from the motor cortex and sensory systems to fine-tune and coordinate muscle movements. This results in precise and fluid actions, such as writing or playing a musical instrument.

2. Detect problems in carrying out voluntary muscle activity and correct them: The cerebellum continually monitors and compares intended movements with actual movements. If there's a discrepancy, it sends corrective signals to the motor cortex, ensuring accurate and efficient muscle control.

3. Regulation of balance and posture: The cerebellum receives input from the vestibular system and proprioceptors (sensors in muscles and joints), enabling it to maintain proper balance and posture. It adjusts muscle activity to compensate for changes in body position or movement.

In summary, the cerebellum plays a crucial role in coordinating skilled muscle activities, detecting and correcting errors in voluntary muscle movements, and regulating balance and posture. These functions ensure smooth, accurate, and well-coordinated actions in our daily lives.

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Answer:

It's a non-metal

Explanation:

100%

Answer:

(Question) If only an element’s atomic number and weight are provided, what other atomic information can be determined for a neutral atom?

(Answer) the number of protons, electrons and neutrons

(Question) What quality differentiates hydrogen (H) from the other elements in group 1, the alkali metals?

(Answer) It is a non-metal.

(Question) On which atomic property proposed by Henry Moseley is the current periodic table of the elements based?

(Answer) atomic number

(Question) You plan to pass alpha particles through a field that contains a consistent type of particle. Which configuration will result in the largest deflection of alpha particles?

(Answer) low-energy alpha particles passing through a field of high mass-number-particles

(Question) Which statement about metals and nonmetals is correct?

(Answer) Metals can be hammered into thin sheets, and nonmetals are brittle.

(Question) Based on properties of elements in the periodic table, which element is the best conductor of thermal energy?

(Answer) vanadium (V)

(Question) Which element has four valence electrons?

(Answer) silicon (Si)

(Question) Which statement best explains why hydrogen’s atomic number is equal to its mass?

(Answer) Hydrogen does not have any neutrons.

(Question) Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?

(Answer) Francium has fewer valence electrons, but they are in a higher energy level.

(Question) Why are the noble gases the least reactive elements?

(Answer) They have a full valence electron shell.

(Question) Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why?

(Answer) An ionic bond is likely because they will want to give away two valence electrons in order to become stable.

(Question) How many electrons can carbon accept from other atoms while bonding?

(Answer) four

(Question) An element has six valence electrons. Which ionic charge will its ion carry?

(Answer) 2-

Questions 14, 15, & 16 are written responses good luck.

Explanation:

UwU

The maximum height reached by the ball is 5 meters (option D).

We can use the following equation:
h = (v^2 * sin^2 θ) / (2g) where h is the maximum height, v is the initial velocity (20 m/s), θ is the angle (30 degrees), and g is the acceleration due to gravity (10 m/s^2).

Plugging in the values, we get:

h = (20^2 * sin^2 30) / (2 * 10)
h = (400 * 0.25) / 20
h = 5 meters

Therefore, the answer is D) 5m.

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Answer:

4200 Newtons

Explanation:

Force = mass x acceleration

1200 x 3.5 = 4200

The reason that most seti programs choose to listen at microwave radio frequencies is that They have an ability of transmitting along a vast range of frequencies without any overlap .

Microwaves are the most energy efficient way to send information In electromagnetic spectrum, microwaves comes  between radio waves and infrared waves. They are high frequency waves and their wavelengths are short . Due to which they are used in radio and television broadcasting too . They have an ability of transmitting along a vast range of frequencies without any overlap . Hence , most seti programs choose to listen at microwave radio frequencies .

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At a depth of approximately 5.27 mm in the powder bed, the pressure in the cylinder will be 4/10 the pressure at the punch.

To calculate the depth at which the pressure in a straight cylinder compact with a diameter of 15 mm will be 4/10 the pressure at the punch, we can use the Kawakita equation, which relates the pressure at any depth in the powder bed to the pressure at the punch.

The equation is given by: P/P0 = (1 - \(e^{(-kh)}\)) / (kh), where P0 is the pressure at the punch, P is the pressure at a depth h in the powder bed, and k is the Kawakita constant.

Substituting k = 0.4 and P/P0 = 4/10, we get: 0.4h / (1 - \(e^{(-0.4h)}\)) = 0.4

Solving for h numerically, we find that h ≈ 5.27 mm. Therefore, at a depth of approximately 5.27 mm in the powder bed, the pressure in the cylinder will be 4/10 the pressure at the punch.

This result indicates that the powder bed is relatively dense and that the compaction process has been effective in reducing the void space between particles.

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Answer:

-2.33 m/s²

Explanation:

The computation of the skateboarder’s acceleration is shown below;

Acceleration means the change in velocity per unit with respect to time.

In the given case, the initial velocity is 7 m/s.

As in the question it is mentioned that  it comes to a stop, so the final velocity would be zero.

And, The time elapsed is 3 seconds.

Now the following equation should be used  

a = (v,final - v,initial) ÷ t

=  (0 - 7)/3

= -2.33 m/s²

At the time of the summer solstice, the noontime altitude of the sun is at its highest point, around 90°.

Altitude is the height above sea level. It is typically measured in either metres or feet. In aviation, altitude can also refer to the vertical distance between an aircraft and a certain reference point on the ground. Altitude can be used to determine the air pressure, temperature, and density of the air. Altitude can also be used to calculate the distance a plane can travel without refueling. Altitude can play an important role in the weather of an area, as air pressure and temperature tend to decrease with altitude. Altitude can also affect the type of vegetation found in an area. In mountain regions, the altitude can have a dramatic effect on the climate, creating distinct areas of vegetation and wildlife. Altitude can also affect the types of crops that can be grown in an area, depending on the air pressure, temperature, and precipitation.

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1 and 3 tie, then 2 and 4 tie, then 5 (zero) is according to the magnitudes of their angular momentum about point O.

A property known as angular momentum describes the rotating inertia of an object or system of objects when they are moving about an axis that may or may not pass through them. The Earth has spin angular momentum from its daily rotation around its axis and orbital angular momentum from its yearly revolution around the Sun. Since angular momentum is a vector quantity, its full representation calls for the identification of both a magnitude and a direction. An orbiting object's angular momentum is proportional to its linear momentum, which is calculated by multiplying its mass m by its linear velocity v, by the perpendicular distance r from the center of rotation.

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Answer:

The total kinetic energy of the car can be divided into two parts: translational kinetic energy, due to the car's motion as a whole, and rotational kinetic energy, due to the rotation of the wheels about their axles.

The translational kinetic energy of the car is given by:

KE_translational = (1/2)mv^2

where m is the mass of the car and v is its speed.

The rotational kinetic energy of each wheel can be calculated as:

KE_rotational = (1/2)Iω^2

where I is the moment of inertia of a wheel and ω is its angular velocity.

The moment of inertia of a uniform disk is given by:

I = (1/2)mr^2

where m is the mass of the disk and r is its radius.

The mass of each wheel is given as 12 kg, so the moment of inertia of each wheel is:

I = (1/2)(12 kg)(0.5 m)^2 = 1.5 kg·m^2

Assuming that the wheels are rolling without slipping, the angular velocity of each wheel can be related to the speed of the car by:

v = rω

where r is the radius of the wheel.

Solving for ω, we get:

ω = v/r

Substituting this expression into the equation for KE_rotational, we get:

KE_rotational = (1/2)(1.5 kg·m^2)(v/r)^2

Simplifying, we get:

KE_rotational = (3/8)mv^2

So the rotational kinetic energy of each wheel is (3/8) of the translational kinetic energy of the car.

The total rotational kinetic energy of all four wheels is therefore:

KE_total_rotational = 4 KE_rotational = (3/2)mv^2

The total kinetic energy of the car is:

KE_total = KE_translational + KE_total_rotational = (5/2)mv^2

So the fraction of the total kinetic energy of the car that is due to the rotation of the wheels about their axles is:

KE_total_rotational / KE_total = (3/5) = 0.6

Therefore, 60% of the car's total kinetic energy is due to the rotation of the wheels about their axles.

About 98 percent of the solar nebula's mass consisted of hydrogen and helium gases.

The solar nebula consisted of 98% hydrogen and helium gases because the solar nebula was composed mostly of hydrogen and helium gases, which are the two lightest elements. These two elements, along with a small percentage of heavier elements, such as carbon, nitrogen, oxygen, and sulfur, were the building blocks of the solar system. The remaining two percent of the solar nebula's mass was made up of heavier elements, such as the aforementioned carbon, nitrogen, oxygen, and sulfur. Therefore, the solar nebula's mass was made up of 98 percent hydrogen and helium gases and 2 percent of heavier elements.

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Answer:

they're important because they simplify the results of the comparison

The magnitude of the impulse on egg B as it lands is the same as egg A since both have equal mass and lands with the same speed.

The impulse experienced by each egg is equal to the change in the momentum of the egg as it lands on the floor.

\(J = \Delta mv\)

where;

m is the mass of each egg

v is the velocity of each egg

The final velocity of each egg is the same since they are dropped from the same height.

Thus, the magnitude of the impulse on egg B as it lands is the same as egg A since both have equal mass and lands with the same speed.

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If "0.3 minute" is correct, then it's 9,543,272 Joules.

If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.

Answer:

22.2 seconds

Explanation:

recall that for a regular wave

v = fλ

where v = wave velocity (we need to find this to solve the next part)

f = frequency = 4.5 Hz

λ = wavelength = 2.0m

Substituting these into the equation above,

v = fλ

v = (4.5)(2)

v = 9.0m/s

Also recall that Distance travelled = velocity x time

in our case, we found velocity above (= 9.0 m/s) and the distance across the harbor is given as 200m, hence

Distance travelled = velocity x time

200 = 9.0 x time

time = 200/9.0

time = 22.2 seconds

It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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