Student A says, "Things like humans don't emit light." Student B says, "Humans emit light, but we just can't see it." Which student is correct?

Answer:

28 N

Explanation:

From the question given above, we were told that 10 N force and 18 N force act in the same direction on the object.

The net force acting on the object can be obtained by simply adding both forces together since they both act on the object in the same direction. This is illustrated below:

Force 1 (F₁) = 10 N

Force 2 (F₂) = 18 N

Net force (Fₙ) =?

Fₙ = F₁ + F₂ (since they both act in the same direction)

Fₙ = 10 + 18

Fₙ = 28 N

Therefore, the net force acting on the object is 28 N.

The distance covered by the friend is 50.28 m.

The speed of the friend is twice mine.

The distance around a circle is known as the circumference of a circle.

To calculate the circumference of a circle, the formula below is used:

circumference = 2 * π * r

where;

r is the radius of the circle

π is a constant = 22/7

The circumference of the two circles will be

Circle 1; r = 4 m

Circumference = 2 * 22/7 * 4 m

Circumference = 25.14 m

Circle 2; r = 8 m

Circumference = 2 * 22/7 * 8 m

Circumference = 50.28 m

If the same time is taken to complete both distances, it means that the second horse is moving twice as fast as the first.

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Therefore, based on the estimated duration of a galactic year, Earth has been around for approximately 18.4 to 20.4 galactic ye

A "galactic year" refers to the time it takes for our solar system to complete one orbit around the Milky Way galaxy. The exact duration of a galactic year is not precisely determined due to various factors, such as the varying speeds of stars within the galaxy. However, it is estimated to be roughly 225-250 million years.

To calculate the number of galactic years Earth has been around based on the age of the solar system (4.6 billion years), we can divide the age of the solar system by the estimated duration of a galactic year:

Number of Galactic Years = Age of the Solar System ÷ Duration of a Galactic Year

Number of Galactic Years = 4.6 billion years ÷ 225-250 million years

Number of Galactic Years ≈ 18.4 to 20.4 galactic years

Therefore, based on the estimated duration of a galactic year, Earth has been around for approximately 18.4 to 20.4 galactic years.

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Answer:

D. All of the above

Explanation:

Because it's the most logical answer.

Answer:

cryosphere is all those areas of earth where the surface is frozen while hydrosphere is all waters of earth, as distinguished from the land and the gasses of the atmosphere

The magnitude of the electric field between the plates is 5.58 x 10⁵ N/C.

The electric field between the plates can be calculated using the formula E = σ/ε0, where σ is the surface charge density and ε0 is the permittivity of free space.

First, we need to calculate the surface charge density. The surface area of one plate is A = (18.0 cm)² = 0.0324 m². The number of electrons moved from one plate to the other is 1012, and the charge of one electron is 1.6 x 10⁻¹⁹ C. So the total charge moved is Q = (1012)(1.6 x 10⁻¹⁹ C) = 1.6 x 10⁻⁷ C.

The surface charge density is then σ = Q/A = (1.6 x 10⁻⁷ C)/(0.0324 m²) = 4.94 x 10⁻⁶ C/m².

The permittivity of free space is ε0 = 8.85 x 10⁻¹² F/m.

So the electric field between the plates is E = σ/ε0 = (4.94 x 10⁻⁶ C/m²)/(8.85 x 10⁻¹² F/m) = 5.58 x 10⁵ N/C.

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Answer:thermal energy

Explanation:

please mark this answer as brainliest

Answer:

Earth spins like top because The earth is rotating around an rotational axis which is tilted 23 degrees with respect to earth's

orbit . where as Uranus rotation is very different from earth.It rotates on its sides

The magnitude of the resultant force is 10.40 KN.

The problem is based on the concept of concurrent coplanar forces. The value of the resultant forces in the vertical direction is to be equated to zero to calculate the value of the angle.

The summation of the forces in the horizontal direction will provide the value of the resultant force in the horizontal direction.

Concurrent coplanar forces these forces emerge from a common point. These forces work in a common plane. The resultant of these forces in a direction is the sum of the forces in that direction.

The resultant force for a coplanar concurrent unidirectional force system is expressed as,

F=F+F, +F

Here, F, F2, and F3  are the unidirectional concurrent coplanar forces and are the resultant of the forces.

The resultant force will be equal to the sum of the forces in the horizontal direction.

FR = (8 kN)sin +(6 kN) sin(40°)

Substitute 54.939  for.

FR = (8 kN) sin(54.93°) +(6 kN)sin (40°) = 10.40 KN

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The total displacement of the vectors is 2 km south.

Distance is the total path that an object in motion has traveled. Displacement is a verb that denotes the movement or displacement of an object.

Here, the vector moves 4 km towards the south, then moves 2 km north. The vector again moves 5 km south and moves 5 km north. Draw the diagram, mentioning the  4 km south movement by the black arrow, the 2 km north movement by the blue arrow, the 5 km south movement by the orange arrow, and the 5km north movement by the green arrow.

Also, mark the starting and ending points. These points give the displacement of the diagram. From the diagram, we can tell, the displacement is 2 km south of the starting point.

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Answer:

YES

Explanation:

The dependent variable is the variable that is being measured or tested in an experiment. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured

Answer:

You do measure a dependent variable

Answer:

low frequencies

Explanation:

The type of sonar that causes loud noises in the water is known as active sonar.

Active sonar is a system that emits sound waves into the water and listens for their reflections to detect objects and measure distances. It works by sending out a pulse of sound, which travels through the water and reflects off objects such as submarines, ships, or marine life.

The reflected sound, or echo, is then received by the sonar system's hydrophone, allowing it to analyze the data and provide information about the surrounding environment.

While active sonar is effective for detecting objects and underwater features, it can also produce loud noises that may have various effects on marine life.

The loud sound pulses can potentially disturb or harm marine animals, particularly marine mammals like whales and dolphins, which rely heavily on sound for communication and navigation. The use of active sonar has been a topic of environmental concern, and efforts are made to minimize its impact on marine ecosystems through regulations and responsible use.

Hence, The type of sonar that causes loud noises in the water is known as active sonar.

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Answer:

Explanation:

A plane mirror is the kind you look into when you look into a "regular" mirror. The image you see is right-side-up. These images are virtual. Real images are always upside down and are made by mirrors that are "parabolic" in shape. Virtual images are always right-side-up.

Answer:

Yes

Explanation:

This helps youngsters be empathetic citizens

A town's vitality may be measured by the sensation of a youth service initiative organized by a civic group or community service center. The given statement exists true.

The word "civic organization" directs to any group of people in a community whose primary mission exists to encourage civic, philanthropic, or religious causes.

Youth involvement in the development, monitoring, reporting, and evaluation of devices, tactics, and programs may increase their likelihood of experiencing.

In conclusion, the strength may be displayed in the youth service initiative of a civic organization or a community service center. It showed what young people can do when they enact together. Education and capacity development are two methods that have been shown to improve youth engagement.

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Answer:

2min

Explanation:

i think it will be clear from photo

Answer: The formula for current is charge/time

so here we have to change subject so we are asked to look for time  

Explanation: so it would be T=Q/I

T=4/2

T=2s

hope this helpss

The sensory distinction of loud and faint is not encoded by a difference in neuron identity. While other distinctions, such as spicy and cool or salty and sweet.

can be attributed to specific receptors or neural pathways, the perception of loudness relies on the intensity of the stimulus rather than distinct types of neurons. Neurons can encode different levels of loudness through variations in firing rates or the recruitment of a larger population of neurons. This allows the brain to perceive the difference in sound intensity without the need for specialized neurons dedicated to specific loudness levels. The sensory distinction of loud and faint is not encoded by a difference in neuron identity. While other distinctions, such as spicy and cool or salty and sweet.

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The small piston must be pushed down into one cylinder of the hydraulic lift 1.71 cm to raise the 9-cm-diameter piston by 35 cm.

In a hydraulic lift, the force applied on the smaller piston is transmitted to the larger piston through a fluid, usually oil, in a closed system. The ratio of the areas of the two pistons is equal to the ratio of the forces applied to them.

The area of the smaller piston is:

A_small = (πr^2) = (π(2cm/2)^2) = (π*2^2 cm^2) = 4π cm^2

The area of the larger piston is:

A_large = (πr^2) = (π(9cm/2)^2) = (π*9^2 cm^2) = 81π cm^2

According to the principle of a hydraulic lift, the ratio of the forces applied to the two pistons is equal to the ratio of their areas.

F_large / F_small = A_large / A_small

So if we know the force on the small piston and the distance it moves, we can find the distance the large piston must move to lift the same weight.

F_small = m*g

Where m is the weight of the object to be lifted and g is the acceleration due to gravity.

F_small = (m/A_small) * A_large

then we can find the distance the large piston must move to lift the same weight:

distance_large = (F_small * distance_small) / F_large

Given, the small piston's diameter is 2 cm, the large piston's diameter is 9 cm, and the large piston's distance to lift is 35 cm

A_small = 4π cm^2

A_large = 81π cm^2

distance_small = 2cm

distance_large = 35cm

So the distance the small piston must be pushed down into one cylinder of the hydraulic lift to raise the 9-cm-diameter piston by 35 cm is:

distance_small = (35*4π) / 81π = (140/81) cm = 1.71 cm

So the small piston must be pushed down into one cylinder of the hydraulic lift 1.71 cm to raise the 9-cm-diameter piston by 35 cm.

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The charging current in an electrical system occurs due to the presence of capacitance. The charging current through the cable capacitance is approximately c) 6.91 A.

When a voltage is applied across a capacitor, it takes a certain amount of time for the capacitor to charge up to the applied voltage. During this charging process, a current flows through the capacitor.

In the case of a three-phase, three-conductor cable, the capacitance exists between the conductors of the cable. The cable capacitance refers to the inherent capacitance present between the conductors.

The charging current through the cable capacitance can be calculated using the formula:

Charging Current \((I) = 2\pi fVC\)

where:

f is the frequency (\(50 Hz\))

V is the voltage (\(11 kV = 11,000 V\))

C is the capacitance (\(2 \mu F = 2 x 10^{(-6)} F\))

Plugging in the values, we get:

\(I = 2\pi (50)(11,000)(2 * 10^{(-6)})\\I = 6.91 A\)

Therefore, the charging current through the cable capacitance is approximately c) 6.91 A.

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Answer: b

Explanation:

The gravitational pull between two objects depends on their mass and distance. Distance meant by :

B. How close the two objects are located, meaning that closer objects have a stronger gravitational pull.

Gravitational force depends directly on the mass of two objects and inversely on the square of the distance between them. This means that gravity increases when mass increases, but decreases when the distance between objects increases. g = GM/r2, where M is the mass of the Earth, r is the radius of the Earth (or the distance between the centre of the Earth ). and you are standing on its surface), and G is the gravitational constant. G (without subscript) is the gravitational constant and c is the speed of light.

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Explanation:

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. ... The gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules. The 9.8 us the gravitational acceleration constant.

so the answer is "the gravitational potential energy is decreasing"

The angle between them is 90°

A = √(1^2 + 1^2) = √2

B = √(1^2 + 1^2) = √2

The magnitude of both vectors is √2

Dot product

A.B = (i + j) . (i - j)

A.B = 1 - 1 = 0

The dot product of two vectors is equal to ABCosx

A.B = ABCosx

0 = √2 × √2 × Cosx

0 = Cosx

∴ x = 90°

The angle between them is 90°

An angle is a figure in Euclidean geometry created by two rays, called the sides of the angle, that share a common termination, called the vertex of the angle. Angles formed by two rays are located in the plane containing the rays. Angles are also generated when two planes intersect. These are known as dihedral angles. An angle defined by two intersecting curves is the angle of the rays lying tangent to the respective curves at their point of junction.

The angle can also refer to the measurement of an angle or of a rotation. This measurement is the length of a circular arc divided by its radius. In the case of a geometric angle, the arc is defined by the sides and is centered at the vertex.

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Answer:

The frequency of the wave is 5 Hz

Explanation:

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time. Its unit is s – 1 or hertz (Hz).

The propagation velocity is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement. Relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation: v = f * λ.

In this case:

Replacing:

50 \(\frac{m}{s}\) = f* 10 m

Solving:

\(f=\frac{50 \frac{m}{s} }{10 m}\)

f=5 Hz

The frequency of the wave is 5 Hz

Answer:

all the body parts work together to make your body function properly, so therefore, a lot of other body parts will break down

Answer:

well I mean it would depend on where u live for this question that's the only reason I am confused.. I'm pretty sure it's A thi

The dot on the screen in the center of the fringe e to the left slit than it is from the dot to the right slit is 940 nm.

The wavelength of mild is defined as. It is far denoted with the aid of the Greek letter lambda (λ). consequently, the space between both one crest or trough of one wave and the next wave is known as wavelength.

A bright fringe creates constructive interference, the wavelength is always in multiple forms.

At the center fringe, the difference is (470 nm)(0) = 0

For the first maximum, the difference is (470 nm)(1) = 470 nm

For the second maximum, the difference = (470 nm)(2) = 940 nm

Thus, for nth maxima, the difference is (470 nm)(n)

From the image uploaded, C is located on the second maximum, therefore the difference is given as  (470 nm)(2) = 940 nm

Therefore, the dot on the screen in the center of the fringe is 940 nm.

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The force applied to pull the box up the ramp acts parallel to the incline is 8N

The force applied to pull the box is expressed as:

\(F_N = F_m + F_f\)

Fm is the moving force

Ff is the force of friction

Get the moving force and frictional fice

\(F_m = 10sin30^0 = 5N\\F_f = 3N\)

The force applied to pull the box up the ramp acts parallel to the incline = 5N + 3N  = 8N

Hence the force applied to pull the box up the ramp acts parallel to the incline is 8N

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Answer:

b

Explanation:

The experimental design to test for wind erosion of soil is not valid. Hence, option B is correct.

The wearing down of the upper surface of land is known as erosion.

The erosion is caused by different natural factors such as :-

These erosion take place with the help of natural wearing agents like running water, wind and ice.

Gravity also plays an important role over here because without gravity these all will not work.

Wind erosion is caused by wind near the land surface in the lower Troposphere. There are different types of wind landforms found in deserts, some of them are :-

Now there are several reasons due to which we can say that this is not a valid experiment design to test the wind erosion such as :-

So because of these reasons, this is not a valid experiment designed to test for wind erosion of soil.

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Answer:

Explanation:'Distance' is the total length travelled by an object. The standard unit is the 'metre'.

A distance-time graph shows how far an object has travelled in a given time.

Distance is plotted on the Y-axis (left) and Time is plotted on the X-axis (bottom)

Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

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