What is work?
A. Force times an object's displacement
OB. The distance an object moves over time
C. The time it takes an object to move a certain distance
O D. The force that distance makes
SUBMIT

Answer:

c

Explanation:

The element is Magnesium as it can form s a +2 ionic charge, and has 3 energy levels. Therefore, option A is correct.

The ionic charge can be described as the oxidation state of the chemical species. The cation exhibits a positive charge while the anion exhibits a negative charge. The number of valence electrons in atoms decides the charge carried by their ions.

In the modern periodic table, the chemical elements from the left side are electropositive and usually act as metals.  The metals donate one or more electrons thus they usually carry a positive charge on ions.

In the periodic table, the chemical elements from the right end are electronegative and usually act as non-metals. The non-metals can accept electrons thus they form anions.

The valence shell configuration of magnesium is 3s². Magnesium (Mg) can donate two electrons from its valence shell and carry a +2 ionic charge.

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The light is at its lowest possible intensity.

The final intensity of the emerging light is (lo/2) × 0.75 = 0.375 × lo.

3. When the first polarizer is rotated clockwise to 90°, it becomes perpendicular to the incident unpolarized light. Therefore, no light can pass through the first polarizer. The intensity of the light is reduced to zero.

4. When the first polarizer is rotated clockwise to 45°, the intensity of the light passing through is reduced by cos²(45°) = 0.5.

This means the intensity becomes half of its original value (lo/2).

When the second polarizer is rotated anticlockwise to 30°, the intensity of the light passing through is further reduced by cos²(30°) = 0.75.

Therefore, the final intensity of the emerging light is (lo/2) × 0.75 = 0.375 × lo.

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Answer:

SCMaglev, Located in Japan

Explanation:

Answer:

the correct answer is

Explanation:

The small intestine absorbs most of the nutrients in your food,and your circulatory system passes them on to other parts of your body to store or use. Special cells helped absorbed nutrients cross the intestinal lining into your blood stream.

hope this works out!!!!

The measurements of sizes of eclipsing binaries depend on data such as light curves, radial velocity curves, and inclination of the orbital plane.

Eclipsing binaries are a type of binary star system in which two stars orbit around each other and periodically pass in front of each other, causing periodic variations in the system's brightness as seen from Earth. These variations are known as light curves and can be used to measure the sizes of the stars.

The analysis of the light curve involves measuring the depth and duration of the eclipses, as well as the shape of the light curve between eclipses. By comparing these measurements to theoretical models of eclipsing binaries, astronomers can determine the sizes and other physical properties of the stars in the system.

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S, P, D, and f are the four potential subshells in quantum mechanical theories. The angle momentum quantum number, l, is represented by these letters in numerical form.

A subshell is a group of states that make up a shell and are identified by the azimuthal quantum number, l. Subshells s, p, d, and f are represented by the values l = 0, 1, 2, and 3, respectively. The equation 2(2l + 1) states how many electrons can fit into a subshell at once.

The circular routes that electrons take in an atom's shells as they circle its nucleus. (In line with the Bohr Model). The primary quantum number, n, serves as a representation of the shells. Additionally, each shell is divided once more into many subshells.

Four subshells are present: s, p, d, and f.

For instance, the first shell has just one sub-shell, which is s.

There are two sub-shells in the second shell: s and p.There are three sub-shells in the third shell: s, p, and d.The remaining shells are made up of all four subshells: s, p, d, and f.

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The electric field between the plates of an air capacitor of plate area 0.21 m2 is changing at a rate of 31400 V/m/s. The permittivity of free space is 8.85419 × \(10^{-12}\) C2/N/m2. The Maxwell’s displacement current is: 5.854 × 10⁻⁹ A

To find Maxwell's displacement current, you need to use the formula:
Displacement Current (I) = ε₀ * (dE/dt) * A
where ε₀ is the permittivity of free space,
dE/dt is the rate of change of the electric field, and
A is the plate area.

Given values:
Plate Area (A) = 0.21 m²
Rate of change of Electric Field (dE/dt) = 31400 V/m/s
Permittivity of free space (ε₀) = 8.85419 × 10⁻¹² C²/N/m²

Now, plug in the given values into the formula:
I = (8.85419 × 10⁻¹² C²/N/m²) * (31400 V/m/s) * (0.21 m²)
I = (8.85419 × 10⁻¹²) * (31400) * (0.21)
I ≈ 5.854 × 10⁻⁹ A

Maxwell's displacement current is approximately 5.854 × 10⁻⁹ A.

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Answer:

145854.24J

Explanation:

Given parameters:

Specific heat capacity of water = 4.184J/g°C

Mass of the water  = 700g

Initial temperature  = 25.6°C

Final temperature = 75.4°C

Unknown:

Thermal energy  = ?

Solution:

To solve this problem, we use the expression below;

 H  = m x c x Ф

H is quantity of heat

m is the mass

c is the specific heat capacity

Ф is the temperature change

  H  = 700 x 4.184 x (75.4 - 25.6)  = 145854.24J

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When two bodies collide with each other in the absence of an external force, then the total final momentum of the bodies is equal to their total initial momentum.

Answer:

rotational kinetic energy

angular momentum

the mechanical energy of frictionless systems

Explanation:

The quantities that are conserved in a movement are extremely useful for the simple resolution of different situations, in addition to the linear movement in the angular movement, some quantities are also conserved.

rotational kinetic energy

angular momentum

the mechanical energy of frictionless systems

If ocean temperatures are increasing under climate change, then it might alter the carbon cycle and therefore it may have negative outcomes on the biological pump.

The term biological pump makes reference to the mechanism by which inorganic carbon atoms can be fixed into organisms due to photosynthetic processes, which is key to maintaining the homeostasis of the biosphere.

Therefore, with this data, we can see that the increase in ocean temperature may impact on the state of equilibrium of the biosphere by altering the carbon cycle and consequently affecting the biological pump.

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Answer:

As frequency (cycles per second) increases the wavelength decreases.

As frequency increases the period also decreases

If wave speed or velocity increases, so too does the frequency

Amplitude of a wave is totally independent of frequency, period etc.  So it remains the same as frequency shifts.  Like FM radio the amplitude remains the same as the frequency of the broadcast modulates.

Explanation:

F= 1/t  Frequency is inversely proportional to time (wavelength)

Period is the time it takes for one wave cycle to complete   Period is 1/f

++++++++++++++++++++++++++++++++++++

vw=λT  Speed of propagation vw= wavelength x T time

vw=fλ  Knowing frequency multiply times wavelength to get wave speed.

++++++++++++++++++++++++++++++++

Amplitude varies only as the energy applied varies.  Like transmission power, in a 60 hz power feed the amplitude can be 120, 230, 460 volts (note these nominal amplitudes are RMS root mean squared  or .707 of the peak of the waveform).

See link below, images are much easier to process, than plain text of course.  Hope this helps.

Oops not allowed to post a link, it appears.  so try the snippet of URL as attached.

Answer:

Im no expert buh its Wave length. :)

Explanation:

Im taking a test about it hope it helps.

The tires of the truck are rotating at approximately 21.4 Radians per second.

To determine the radian per second at which the tires of the truck are rotating, we first need to calculate the angular velocity of the tires. We know that the linear velocity of the truck is 45.0 m/s, and since the tires are in contact with the ground, their linear velocity must be the same. Therefore, the circumference of the tire can be calculated as 2πr, where r is the radius of the tire (0.335 m in this case).

Circumference of tire = 2πr = 2π(0.335) = 2.104 m

Now, we can calculate the angular velocity using the formula:

Angular velocity = Linear velocity / Circumference of tire

Angular velocity = 45.0 / 2.104

Angular velocity ≈ 21.4 radians per second

Therefore, the tires of the truck are rotating at approximately 21.4 radians per second.

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Answer:

Velocity

Explanation:

Answer:

10m/s I believe

Explanation:

F=MA

A=F/M

A=2/0.2

A=10m/s

The flow of electricity in a certain path is the circuit.

Answer:

It's climate sensitivity.

Answer:

⭐. cryptogams ( non-flowering & non-seed bearing)

⭐. phanerogams ( flowering & seed bearing)

If a metal ball is suspended by a rod , the forces acting on the system are balanced so there is no motion observed in the system and this is because of the upward tension in the rod .

Option 1 says : the tension in the rod

The gravitational pull that is acting downwards direction and the tension in rod that is acting in a anti parallel direction to the gravitational pull . being on the same line of action and in opposite directions , these forces cancels each other out .

Option 2 says : the friction of rod

Friction acts in cases of contact forces like a drag or pull not in cases of non-contact forces like gravity , thus friction can't balance it .

Option 3 says : the electromagnetic force

There are no charges or magnets present in the system so the electromagnetic force is absent in this case Thus they cant balance the gravitational force.

Option 4 says : the strong force around the rod

The strong force around is not on the line of action of the gravitational pull so it cant balance it.

So out of all the forces only the tension present in the rod is able to balance the gravitational force

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According to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

option B is the correct answer.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.

In other words, an object will maintain its state of motion (whether it is at rest or moving in a straight line at a constant speed) unless a force acts upon it.

Thus, according to Newton’s first law of motion, an object at rest will begin to move, when an unbalanced force acts upon it.

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Answer:

its B

Explanation:

Answer:65.28

Explanation:

A long string has a standing wave with 2 loops at a frequency. The speed of the waves in the string is 65.28 m/s

The frequency is the number of cycles completed per second.

Given the length of the string l = is 1.70 m, no of loops n =2, frequency of wave f =38.4 Hz, then the speed of the waves is

f = nv /2l

Substitute the following values, we get

v = 38.4 x 2 x 1.70 / 2

v =65.28 m/s

Thus, the speed of the waves in the string is 65.28 m/s.

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The current flow through the 15 ohms resistance is 10 A.

We need to know about the resistance of conductive material to solve this problem. The resistance of the material depends on its resistivity and follows this equation

R = ρ . L / A

where ρ is resistivity, L is the length of the material and A is the surface.

Resistance can be defined as the ratio of the voltage applied to the current flow It can be written as

R = V / I

where R is resistance, V is voltage and I is current.

From the question above, we know that

V = 150 V

R = 15 Ω

By substituting the given parameters, we can calculate the current

R = V / I

I = V / R

I = 150 / 15

I = 10 A

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Answer:

The current flow:

I = 10 A

Explanation:

Given:

R = 15 Om

U = 150 V

________

I - ?

Ohm's law:

I = U / R = 150 / 15 = 10 A

a star ten times the mass of our Sun.

A star ten times as big as the sun will last for just 20 million years just on main sequence, compared to the sun's about 10 billion years.When compared to the known universe age at 13.8 million years, the red dwarf, which has half the mass of the sun, has a lifespan of 80 or 100 billion years.

Stars with very low masses called red dwarfs.They therefore have low fusion rates, low pressures, and consequently low temperatures.

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Answer:

(a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

Explanation:

Given that,

Time of boy A= 30 min

Time of boy B = 60 min

(a), We need to find the physical quantity that is same for both boys

Using given that,

We know that,

Work done depends on the force and displacement.

Here, force and displacement is same for both boys.

So, we can say that the work done will be same for both boys.

(b).  We need to find the physical quantity that is different for both boys

Using given that,

We know that,

Power is equal to the work done divided by time.

Time is different for both boys so, the power will be different for both boys.

We need to calculate the ratio of power of both boys

Using formula of power

\(P=\dfrac{W}{t}\)

Put the value into the formula

For boy A,

\(P_{A}=\dfrac{W_{A}}{t_{A}}\)....(I)

For boy B,

\(P_{B}=\dfrac{W_{B}}{t_{B}}\)....(II)

From equation (I) and (II)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{\dfrac{W}{30}}{\dfrac{W}{60}}\)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{60}{30}\)

\(\dfrac{P_{A}}{P_{B}}=\dfrac{2}{1}\)

Hence, (a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

The index of refraction of the plastic is approximately 8.39. We can use the formula: n = (λ * L) / d

To determine the index of refraction of the plastic, we can use the formula:

n = (λ * L) / d

where:

n is the index of refraction,

λ is the wavelength of light (632.8 nm),

L is the distance from the slits to the fluorescent coating (3.05 m), and

d is the separation between the two scratches (0.230 mm).

Converting the units to meters, we have:

λ = 632.8 nm = 632.8 × 10^(-9) m

L = 3.05 m

d = 0.230 × 10^(-3) m

Plugging the values into the formula, we get:

n = (632.8 × 10^(-9) m * 3.05 m) / (0.230 × 10^(-3) m)

= 8.39

Therefore, the index of refraction of the plastic is approximately 8.39.

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