15. What is length of Earth's year determined by?
6 years
80 days
1 year
8 light years

Answer:

The greater weight increases the terminal velocity by acting as an extra force against gravity and air resistance.

The hypothesis is, the thickness of transparent glass affects how much light passes through. Option A is correct.

A hypothesis is a proposed explanation or prediction for a phenomenon or observation that is based on limited evidence and subject to testing and validation through further investigation. It is an essential part of the scientific method, which involves developing a research question, making observations, and forming a hypothesis to explain the observed phenomenon.

The hypothesis should be testable, falsifiable, and based on evidence and reasoning. Testing the hypothesis involves designing experiments and collecting data, which can either support or refute the hypothesis. If the hypothesis is supported by the data, it may be further developed into a scientific theory, which is a widely accepted explanation of a natural phenomenon that has been extensively tested and validated. Option A is correct.

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A cosmic ray proton approaching the Earth's equator along a line towards the center of the Earth will be deflected by the Earth's magnetic field in a direction perpendicular to both the direction of the proton's motion and the Earth's magnetic field lines.

The direction of deflection will depend on the orientation of the Earth's magnetic field at the point of entry. An electron would also be deflected in the same direction as the proton because the deflection of a charged particle in a magnetic field is determined by its charge and velocity, and the electron has a negative charge that would cause it to deflect in the opposite direction to the proton.

A neutron, on the other hand, has no charge and would not be deflected by the Earth's magnetic field.

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Answer:

The color of the Anthocyanins changes depending on the PH of what they come into contact with, because wine already has acid in its Anthocyanins are red. But as soon as you expose those Anthocyanins to more alkaline factors, it will start to turn blue.

Answer:

the measured charge will be -2 elementary charges.

Explanation:

solution:

the formula is T = F * r * sin(theta) so just input the numbers and solve it.

Explanation:

Torque is the twisting force that tends to cause rotation. The point where the object rotates is known as the axis of rotation. Mathematically, torque can be written as T = F * r * sin(theta), and it has units of Newton-meters

Your weight at the top of the ladder would be one-quarter of its normal value. The correct option is C.

The gravitational pull of the Earth, denoted by g, is the net acceleration imparted to objects by the combined effect of gravitation and centrifugal force. It is a vector quantity whose direction corresponds to a plumb bob and whose strength or magnitude is determined by the norm.

The formula for gravity is,

g = GM / R²

g = 1 / R²

gt = 1 / (2R)²

gt / g = R² / 4R²

gt = 1 / 4g

Therefore, at the top of the ladder, your weight would be one-quarter of its normal value.

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In his famous gold foil experiment, Ernest Rutherford discovered that the atom was mostly composed of empty space, and that a small, dense nucleus containing the majority of the atom's mass was located at its center.

What is Rutherford?
First Baron Rutherford of Nelson Ernest Rutherford, OM, FRS, HonFRSE The father of nuclear physics is, a New Zealander who lived from 30 August 1871 to 19 October 1937. He is regarded as the greatest experimenter since Michael Faraday by Encyclopaedia Britannica (1791–1867). He worked outside of his home country for a significant portion of his career, both in Canada and in the Kingdom. Early research by Rutherford led to the discovery of the radioactive element radon, the idea of radioactive half-life, and the classification and naming of alpha and beta radiation. At McGill University in Quebec, Canada, this work was completed. It served as the foundation for his 1908 Nobel Prize in Chemistry, which was given in recognition of his studies into to the disintegration of a elements.

He also found that a small percentage of alpha particles, which are positively charged particles, were deflected rather than passing straight through the gold foil. This led to the conclusion that the atom was composed of a positively charged nucleus surrounded by negatively charged electrons.

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Answer:

After you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able toAfter you analyze current research on existing theories in child development (e.g., Piaget, Erikson, and prior findings

versus new brain development research). Please also work toward incorporating a "Development of Mind" theory Inin

children by whichever theorist you like.

YOU may use any medium you wish for a presentation and identify practices that develop a child's imagination and

creativity from reading and writing skills through children's literature.

This active learning assignment will answer the same question that Piaget had, "Do children and adults think the same

way?" You will also be able to

Explanation:

Answer:

There are 5 general layers; organism, population, community, ecosystem, and biosphere.

Explanation:

Hope this helps!

Based on the information, we can infer that A. represents a Mitochondria.

Mitochondria is a term to refer to the eukaryotic cell organelles responsible for supplying most of the energy necessary for cell activity through the process called cellular respiration.

Based on the information, we can infer that the element that is labeled with the letter A is a mitochondrion because its location is that of a mitochondrion. In this case, the mitochondria is red, although in other models it can be represented with another color. In general, it is given this shape and this color to distinguish it from other elements of the cell.

Note: This question is incomplete. Here is the complete information:

Attached image

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El Capitan is a rock formation in Yosemite National Park, located on the north side of Yosemite Valley, near its western end. El Capitan, a sheer granite cliff, is 910 m above the valley floor. The jumper is in free fall for 13.7 seconds.

Extreme-sports enthusiasts have been known to jump off the top of El Capitan, at which point she opens her parachute. How long is the jumper in free fall? We'll ignore air resistance.In free fall, acceleration is constant and equal to the acceleration due to gravity, g = 9.81 m/s2. The jumper's initial speed is 0 because she starts from rest. The final speed, vf, is determined using the following equation:v_f = sqrt(2gh)where g = 9.81 m/s2, and h = 910 m because this is the height of El Capitan above the valley floor. The final speed is:v_f = sqrt(2 * 9.81 * 910) = 134 m/sWe can now use the following equation to determine the time, t, it takes the jumper to fall:v_f = gtSolving this equation for t gives us:t = v_f/g = 134/9.81 = 13.7 seconds.

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Given :

A badminton shuttlecock leaves the racquet traveling 30 m/s.

It goes over the net 0.5  seconds later with a speed of 10 m/s.

To Find :

The average acceleration of the shuttlecock.

Solution :

We know, average acceleration(a) is given by :

\(a = \dfrac{\text{Change in speed}}{\text{Time taken }}\\\\a = \dfrac{10-30}{0.5 }\ m/s^2\\\\a = -40\ m/s^2\)

Therefore, the average acceleration is -40 m/s².

Hello,

✔ We have Ek = 1/2m x v²

In order to come to a complete stop, the cyclist must convert all his kinetic energy into thermal energy. Given that the braking force opposes movement, the work is therefore resistant, i.e.  W = -10 214.4 J.

Answer: 0.25A

Explanation: To calculate the current in the circuit, we can use Ohm's Law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R):

I = V / R

In this case, the total resistance of the circuit is the sum of the individual resistances of the three bulbs in series, which gives us:

R = 2 + 2 + 2 = 6 ohms

The voltage of the battery is given as 1.5V.

So, using Ohm's Law, we can calculate the current in the circuit as:

I = V / R = 1.5 / 6 = 0.25 amps

Therefore, the current in the circuit is 0.25 amps.

The current in the circuit is 0.25 A.

Voltage across the circuit, v = 1.5 V

Resistance in each resistors, R = 2Ω

Since, the resistors are connected in series combination, their effective resistance,

R' = 3R

R' = 3 x 2

R' = 6Ω

According to Ohm's law, if the temperature and all other physical factors remain constant, the voltage across a conductor is directly proportional to the current that is flowing through it.

So, according to Ohm's law,

V = IR

Therefore, current flowing through the given circuit,

I = V/R

I = 1.5/6
I = 0.25 A

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C)

Explanation

the weigth of a mass is given by the formula

we already now, that the acceletion of gravity is bigger in the earth than in the moon ( because it depens on the mass, and the earth has very more mass than the moon)

so, for the moon we have

now, when the mass in in the earth

now, if we compare the masses ,equal ratios

we can see a ration of the weigth and g, as w depens on g, we can replace

we can conclude mass is the amount of matter in an object and does not change with location

If an object is moved to a location of greater gravitational force, , its weight will increase, but mass still remains the same.

so, the answer is

I hope this helps you

Answer: The force that pushes a plane upwards is the lift generated by the wings as the plane moves through the air. The lift force is created by the difference in air pressure above and below the wings, which creates an upward force that opposes the weight of the plane.

The traffic cop needs 23.3 seconds to pass the automobile.

When your velocity (not speed) changes, you are accelerating. A automobile moving at a steady 100 km/h in a straight line has no acceleration. Average acceleration is equal to (change in velocity) / (duration). The car's acceleration is zero because its change in velocity is also zero.

\(d1 = v1*t1 = 35.0 m/s * 1 s = 35.0 m\)

\(d = d1 = 35.0 m\)

\(d2 = v2*t + (1/2)at^2\)

\(d2 = (1/2)at^2\)

\(v2*t + (1/2)at^2 = (1/2)at^2\)

\(v2*t = (1/2)at^2\)

Solving for t, we get:

\(t = (2v2/a) = (235.0 m/s)/3.0 m/s^2 = 23.3 s\) (rounded to 2 decimal places)

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The electrostatic force of attraction between the proton and electron is 4.2 x 10⁻⁸N.

The gravitational force between the proton and electron is 1.9 x 10⁻⁴⁷N.

a) Charge on proton = charge on electron = q = 1.6 x 10⁻¹⁹C

Distance between the proton and electron, r = 7.4 x 10⁻¹¹m

The electrostatic force of attraction between the proton and electron is given by,

F = 1/4πε₀(q²/r²)

F = 9 x 10⁹ x (1.6 x 10⁻¹⁹)²/(7.4 x 10⁻¹¹)²

F = 9 x 10⁹ x 2.56 x 10⁻³⁸/54.76 x 10⁻²²

F = 4.2 x 10⁻⁸N

b) Mass of the electron, m₁ = 9.1 x 10⁻³¹kg

Mass of the proton, m₂ = 1.67 x 10⁻²⁷kg

Distance between the proton and electron, r = 7.4 x 10⁻¹¹m

The gravitational force between the proton and electron is given by,

F = Gm₁m₂/r²

F = 6.67 x 10⁻¹¹x 9.1 x 10⁻³¹x 1.67 x 10⁻²⁷/(7.4 x 10⁻¹¹)²

F = 1.9 x 10⁻⁴⁷N

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Answer:

1.6 m/s west

Explanation:

The recoil velocity of the launcher is 1.6 m/s west.

When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.

A water-balloon launcher with mass 5 kg fires a 1 kg balloon with a velocity of 8 m/s to the east.

Final momentum will be zero, so

m₁u₁ +m₂u₂ =0

Substitute the values for m₁ = 5kg, m₂ =1kg and u₂ =8 m/s, then the recoil velocity will be

5 x v +1x8 = 0

v = - 1.6 m/s

Thus, the recoil velocity of the launcher is  1.6 m/s (West)

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Answer:

Their displacement is 5 Km from the cabin.

Explanation:

The displacement is define is the shortest distance between two points. It is the shortest distance of a line that joins two points together. It quantifies both the distance and direction of the net or total motion along a straight line from the initial position to the final position of the point trajectory. In this case, the straight line joining the cabin to the stream is line S which is equal to 5 Km

Explanation:

The question is sound. The frequency and wavelength are given so you can solve for wave's velocity. It's just a matter of changing the notation.

\(v = \nu \lambda = (15×10^9\:\text{Hz})(0.2\:\text{m})\)

\(= 3×10^9\:\text{m/s}\)

Answer:

b. p = mv

Explanation:

The momentum is the mass in motion, so it is calculated as the mass times the velocity. It means that the equation to calculate the momentum is

p = mv

Where m is the mass and v is the velocity of the object.

So, the answer is

b. p = mv

The correct answer is B. Observations had led to the belief that the Sun, Moon, and stars revolved around Earth.

The geocentric model, which placed Earth at the center of the universe with the Sun, Moon, and stars revolving around it, was widely accepted until the 16th century for several reasons. One of the primary reasons was that observations seemed to support this view. For example, it was observed that the stars appeared to move across the sky in a circular path, and it was assumed that this was due to their motion around Earth. Similarly, the Sun and Moon appeared to rise and set each day, which was consistent with their motion around Earth.

The geocentric model was consistent with the prevailing philosophical and religious beliefs of the time, which held that Earth was a special and unique place at the center of the universe. It was not until the development of the heliocentric model, which placed the Sun at the center of the solar system, and the refinement of astronomical observations, that the geocentric model was gradually abandoned.
The correct option is B. Observations had led to the belief that the Sun, Moon, and stars revolved around Earth.

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The horizontal distance travelled by the fish when dropped is 131.25 m.

The time of motion of the fish from the given height is calculated by applying the following kinematic equation as shown below.

h = vt + ¹/₂gt²

where;

h = 0 + ¹/₂gt²

t = √ ( 2h / g )

t = √ ( 2 x 135 / 9.8 )

t = 5.25 seconds

The horizontal distance travelled by the fish when dropped is calculated as;

X = vt

X = 25 m/s  x  5.25 s

X = 131.25 m

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