The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume. Together these two gases make up approximately 99% of the dry atmosphere. Why are these gases important?

A) They are essential to life on Earth.
B) They have a great influence on climate.
C) They absorb ultraviolet radiation from the sun.
D) They increased over time causing global warming.

Momentum=Mass•Velocity

=5 kg•2 m/s

=10 kg-m/s

The momentum of a book with a mass of 5 kg is pushed off a table with a velocity of 2 m/s is option D. 10 kg-m/s.

Here,

        p = momentum

        m = mass

         v = velocity

        p = mv

           =5×2

           =10 Kg*m/s

Hence, the momentum of a book with a mass of 5 kg is pushed off a table with a velocity of 2 m/s is option D. 10 kg-m/s.

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Answer:

9 terms. In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds. Two double bonds means that the total number of electrons being shared in the molecule is.

Explanation:

The "lb/s² " is not a valid unit of work.

Each of the others is (a unit of force) x (a unit of distance) which is pretty much the definition of work.

The joule is the metric unit of measurement for work and energy, with 1 J = 1 N•m. Inch-ton is not a valid unit of work.

The joule is the metric unit of measurement for work and energy, where 1 J = 1 N•m. Work and energy share the same units in the SI system. In the context of this question, inch-ton is not a valid unit of work because it does not represent the correct combination of force and distance.

There are two qualities that can describe most variables - direction and magnitude. A vector possesses both a direction and magnitude, while a scalar possesses only a magnitude.

Hope this helps!

Answer:

It can be described on by its magnitude

MAGNITUDE

Explanation:

Vector quantities are described by their magnitude and their direction both

so all vector quantities like velocity etc need direction and magnitude both like velocity is given as 60 km/h towards North direction

But for scalar quantities we defined them only by their magnitudes

Like here if we define mass then we do not require any direction for its complete explanation.

so here correct answer will be

MAGNITUDE

What are the choices to pick from? : )

Answer:

c

Explanation:

Answer:

D. Plants are autotrophs and animals are heterotrophs

Explanation:

Plants are autotrophs because they make their own food through photosynthesis

Animals have to consume other animals or plants as food and can't make food on their own, so they are heterotrophs

Answer:

D. Plants are autotrophs and animals are heterotrophs

Explanation:

The ossicles, a trio of tiny bones in the middle ear, receive sound vibrations from the eardrum and transfer them to the cochlea, which then converts them into electrical signals for the brain.

The part of the ear that receives the signal from the eardrum is the ossicles in the middle ear. Once the eardrum, or tympanic membrane, vibrates in response to sound waves, it transfers these vibrations to the ossicles. These three tiny bones - the malleus (hammer), incus (anvil), and stapes (stirrup) - act as a lever system, amplifying the sound vibrations and transmitting them to the cochlea in the inner ear. Inside the cochlea, the mechanical vibrations are converted into electrical signals by hair cells, and these signals are then transmitted to the brain via the auditory nerve.

It could result in it not being good for your joints, as well as in the long run but shouldn't cause problems when your a child. I hope this helps your question!

Answer:

C

Explanation:

Answer:

Explanation:

5. Limestone typically doesn't accumulate in the ocean at depths below 4,000 meters because below that depth, calcite is ___not preserved ____.

The calcite compensation depth CCD is the depth at which the rate of dissolution of calcite increases beyond that of accumulation.

6. Based on the principle of original horizontality, geologists conclude that layers of sedimentary rock that have been tilted must have been subjected to __tectonic forces_____.

Tectonic forces causes changes in a particle terrain

7. Based on the principle of inclusions, the cobbles in conglomerate must have been formed __earlier than_____ the conglomerate.

The principle of inclusion states that the inclusion is older than the rock that contains it.

8. Geologists use the principle of __fossil and fauna succession _____ to justify using fossils in a sample of sedimentary rock to determine the rock’s age.

The principle of fossil and fauna succession was credited to Williams Smith and it is used for relative dating of a sedimentary sequence. Here, fossils of plants and animals are used to date a sequence.

9. Partings between adjacent beds of sedimentary rock may represent periods of __unconformity _____, which could range from a few decades to a few centuries.

An unconformity is a period of non-depsotion or erosion within a rock layer.

10. Some graded beds, especially those resulting from deposition by a fast-moving debris flow, are reversed, which means ___the oldest____ material is at the top instead of at the bottom.

From the principle of superposition of strata, we know that the oldest layer is at the bottom of the sequence and the youngest is on top.

Answer:

1. high energy

2. deposition

3. Silt

4. limestone

5. Soluble

6. tectonic forces

7. before

8. principle of faunal succession

9. non deposition

10. coarser

The formula for kinetic energy is equal to 1/2mv^2, where "m" is the mass of the object (in kilograms) and "v" is equal to the velocity of the object (in meters per second). To calculate the speed, simply plug in the values and solve.

KE = 0.5mv^2

304 J = 0.5(0.3 kg)v^2         -mass converted from grams to kilograms

v = 45.02 m/s

The baseball is travelling about 45.02 meters per second.

Hope this helps!

The speed of the baseball is 45.02 metres per seconds square.

Given the following data;

Conversion:

1000 grams = 1 kilogram

300 grams = X kilograms

Cross-multiplying, we have;

X × [tex]1000[/tex] = [tex]300[/tex]

X = [tex]\frac{300}{1000} = 0.3[/tex] kilograms.

To find the speed of the baseball;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

[tex]K.E = \frac{1}{2}MV^2[/tex]

Where;

Substituting the values into the formula, we have;

[tex]304 = \frac{1}{2}[/tex] × [tex]0.3[/tex] × [tex]V^{2}[/tex]

[tex]608 =[/tex]  [tex]0.3[/tex] × [tex]V^{2}[/tex]

Dividing both sides by 0.3, we have;

[tex]V^{2} = \frac{608}{0.3}\\\\V^{2} = 2026.67[/tex]

Taking the square root of both sides, we have;

[tex]V = \sqrt{2026.67}[/tex]

V = 45.02 metres per seconds square.

Therefore, the speed of the baseball is 45.02 metres per seconds square.

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Newton´s second law of motion

Final answer:

The reason a school bus full of kids takes longer to stop than a small car can be attributed to Newton's Second Law of Motion and the fact that kinetic energy increases with the square of the speed, requiring more work to stop a more massive vehicle like a school bus.

Explanation:

The phenomenon where a school bus full of kids takes longer to stop than a small car can be explained by Newton's Second Law of Motion, which states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. The more mass an object has, like a school bus with children, the more force is needed for it to change its state of motion. When stopping, the required force translates to the braking force, which must overcome the kinetic energy of the vehicle. Since kinetic energy increases with the square of the speed, and because a school bus has a greater mass, it has significantly more kinetic energy than a small car at the same speed. This results in a longer stopping distance for the school bus, as the brakes need to do more work to reduce its kinetic energy to zero.

radiation since the suns rays are ultraviolet which is a form of radiation

Heat transfer from the Sun to the Moon is mostly through the process of Radiation.

Explanation:

In space, the heat is being transferred through the process of radiation. There is no atmosphere in the moon so it will get heat or cool by the process of conduction or convection.

In space, heat gets transferred by radiation which mainly takes place in the infrared band of electromagnetic waves. Radiation can transmit heat by the electromagnetic wave. It can take the heat transfer process in the vacuum.

Answer:

Water is a polar molecule.

Explanation:

The fundamental rule of solubility is that "like solutes would dissolve in like solvents". Both NaCl and water are polar compounds.

NaCl is an ionic compound which forms from transfer of an electron from the Cl atom and a loss of electron from Na. This leaves a separation of charge on both atoms with Na being positively charged and Cl being negatively charged. This charge separation makes NaCl a polar compound.

Water on the other hand is a polar covalent solvent. The covalent bond results from the sharing of electrons between oxygen and hydrogen atoms. Due to the more electronegative nature of Oxygen, it pulls the shared electron more closely to itself than the Hydrogen atom. This unequal sharing of the electron leaves a net positive charge on Hydrogen and a negative charge on Oxygen.

For this reason, NaCl will dissolve in water.

Answer: Water is a polar molecule.

Explanation:  When solid sodium chloride (salt) dissolves in water, it separates into sodium ions and chloride ions that move about freely in the water solution. The attraction between the Na+ and Cl− ions in the solid is so strong that only highly polar solvents like water will dissolve NaCl.

Also i got it right on the test

Answer:  

An unbalanced force is one that causes a change in the motion of the object to which the force is applied. An object at rest or an object in steady motion continues at rest or in unchanged motion unless it is subjected to an unbalanced force.

Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an object, the object stays still or continues moving continues to move at the same speed and in the same direction.

Explanation:

A satellite orbiting Earth at constant speed would be considered an unbalanced force because it is an object in steady motion and it will remain in steady motion unless it is subjected to an unbalanced force.

Answer:

An unbalanced force is one that causes a change in the motion of the object to which the force is applied. An object at rest or an object in steady motion continues at rest or in unchanged motion unless it is subjected to an unbalanced force.

Explanation:

Answer:

a = 1.63 m/s²

Explanation:

Given in the question that,

initial speed of the rock = u = 0 m/s

final speed of the rock = v = 4.9 m/ s

time taken = t = 3 sec

We will use Newton's law of motion

Formula to use to calculate the acceleration of gravity on moon

4.9 - 0 = a(3)

4.9 = a(3)

a = 4.9/3

a = 1.63 m/s²

A vector is any quantity that has magnitude and direction. A scalar is any quantity that has magnitude but has no direction.Displacement and velocity are vectors, distamce and speed are scalars.

The term referring to a quantity with both magnitude and direction is vector. The concept of vector differentiates it from a scalar which only has magnitude. An example is velocity, which is a vector measurement.

The term that refers to a quantity that has both magnitude and direction in physics is known as a vector. This differentiates it from a scalar which only has magnitude. For instance, velocity is a vector quantity because it includes both speed (a scalar quantity) and direction. If you say a car is moving at 60 miles per hour, that's speed. But if you say the car is moving at 60 miles per hour to the north, that's velocity, which is a vector measurement.Physics is the branch of science that deals with the study of matter, energy, and the interactions between them. It includes the study of various physical quantities, including those that have both magnitude and direction. One such quantity is velocity, which is defined as the rate of change of displacement with respect to time. Velocity has both magnitude (speed) and direction (the direction of motion).

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Answer:

A. Sifting since the wood shavings are small enough to fall through the sift but nails are not.

From that particular list of choices, Flotation is the best. (B)  Fill the trash can with water and stir it up.  The nails will sink to the bottom, and the wood shavings will float on top, and you can skim them off.

But then what have you got ?  You've got wet nails that'll rust if you don't dry them off in a hurry, and you've got a sticky wet pile of soggy wood shavings.

Can I suggest a better way to separate them ?  Dump everything out on the ground, and pass a humongous magnet over it.  The wood shavings will just lay there, but the nails will jump out and stick to the magnet.  And everything will stay dry.

kinetic energy and mass are dieectly proportional

Answer:

Kinetic energy and mass are directly proportional to each other

Explanation:

As we know by the formula of kinetic energy

[tex]KE = \frac{1}{2}mv^2[/tex]

now we know that

kinetic energy depends on the mass of object and it is product of mass and square of the speed.

Here we can say that if mass is doubled then kinetic energy also get double and if mass is decreased then kinetic energy also decreases

This type of relationship is known as direct relationship and here since it shows direct relationship so correct answer will be

Kinetic energy and mass are directly proportional to each other

Answer:

a) Less because the kinetic energy of the skier increased as they descended down the kill in turn the potential energy dropped

sorry only have the a part

Explanation:

Answer:

Its a ceramic

Explanation:

Brick does not contain any metal so it couldnt be an alloy.

Answer:

Brick is a ceramic

Explanation:

Alloy is a metal made up by combining two or more metallic elements. for example, bronze is made up by alloying tin with copper. Ceramic materials is an inorganic,non metallic which is often crystalline oxide,nitride or carbide material. For example, Tiles are made up of natural clay sand and water.

PLEASE MARK BRAINLIEST

The period of Neptune is 165 years if the semi-major axis is 30.11 using the given formula.

Answer: Option D

Explanation:

The period of any planet revolutions around the sun can be determined using Kepler third law. As that law states that square to the period of one complete revolution of every planet is equal to cube of semi major axis of that planet. So the formula can be derived as  

                             [tex]T^{2}=a^{3}[/tex]

Where T is the time taken for completing one revolution and a is the semi-major axis of the planet.

As here Neptune's semi major axis is given as 30.11. So the period of Neptune can be determined as follows:

                      [tex]T^{2}=(30.11)^{3}[/tex]

                      [tex]T^{2}=27,298[/tex]

Then take square root of this value:

                               [tex]T=\sqrt{27,298}[/tex]

                                      T = 165 years

Thus, the Neptune takes 165 years for one complete revolution of the sun.

Answer:

C. X: Allows current to flow into the commutator

Y: Conducts current to the armature and reverses direction of current

Explanation:

Carbon brush is a motor brush that acts as the conducting block  for current between the stator and the rotor of a motor.It is made of carbon blocks.The brush is held in place using a spring that ensures its contact position with the commutator.The commutator prevents the torque on the motor from reversing whenever the coil is rotating in the magnetic field.

Answer:

C

Explanation:

im smart

Answer:

B.

The form of energy that travels as electromagnetic waves.

Explanation:

Light energy, or electromagnetic field energy, is the form of energy that travels as electromagnetic waves. These waves do not need a medium through with to travel, so they are able to travel through the vacuum of outer space. Some types of light can be sensed by the human eye.

The best definition given is B: light energy is the form of energy that travels as electromagnetic waves, and this form of energy includes both wavelike behavior and particle-like characteristics as photons.

The best definition of light energy among the given options is B. The form of energy that travels as electromagnetic waves.

Light energy is a form of electromagnetic radiation that moves through a vacuum at a constant speed of approximately 3 × 108 meters per second. This radiation exhibits wavelike behavior, which includes a frequency (v) and a wavelength (λ), adhering to the equation c = λv, where c represents the speed of light. Additionally, light can be described as a stream of particles called photons, capturing the dual nature of electromagnetic radiation as both waves and particles, a concept referred to as wave-particle duality.

Light energy is best defined as the form of energy that travels as electromagnetic waves. Light is an example of a transverse wave, where the oscillations occur in the electric and magnetic fields perpendicular to the direction of motion. It exhibits both wave-like and particle-like behavior, known as wave-particle duality, and can be described as a stream of particles called photons, with energy related to the frequency or wavelength of the light.

Answer:

__________

Explanation:

Answer:

=8.0 Watts

Explanation:

Power is a ratio of work done over time. The power in an electric circuit is calculated using the following formula:

P=I²R

P is power, I is  current, R is resistance

Therefore,  Power= 4²ₓ 0.5Ω

=8.0 Watts

The power in the parallel circuit is 8 W.

Explanation:

Power in an electric circuit is defined as the current generated for a given amount of input voltage. So power of an electric circuit is directly proportional to the product of current and voltage in the circuit. The mathematical representation is

             [tex]\text { Power }=\text { Current } \times \text { voltage }[/tex]

As per Ohm’s law, the current flowing in a closed circuit is directly proportional to the voltage applied to the circuit and resistance is the constant of proportionality between them. So

            [tex]\text { Current } \propto \text { voltage }[/tex]

            [tex]\text {Voltage}=\text {Current} \times \text {Resistance}[/tex]

Thus the formula for power in terms of resistance will look like

      [tex]\text { Power }=\text { Current } \times \text { current } \times \text { resistance }=(\text { Current })^{2} \times \text { Resistance }[/tex]

As it is given that the net current in the parallel circuit is 4 A and equivalent resistance of the parallel circuit is given as 0.5 ohms. Then power is

                 [tex]\text { Power }=4 \times 4 \times 0.5 = 8 W[/tex]

Thus, the power in the parallel circuit is 8 W.

The answer is B. Because the two materials will not switch temperature, heat is only transferred from a hotter material to a colder material to achieve equilibrium in temperature. Thus, option C and D is out. Option A is also wrong because the faster moving particles should be in the hotter material not the colder material, this is because when the material is hot, the kinetic energy of the particles increase, causing it to move faster.

Answer:

D. Down

Explanation:

The uranium-containing rods in the diagram should be moved down in order to slow down the fission reactions in its nuclear reactor.

Nuclear fission is the process of splitting the nucleus of heavier atoms to produce two or more atoms of lighter nucleus with the release of large amounts of energy.

In order to slow down the fission reactions in its nuclear reactor, neutron absorbers are introduced and the uranium-containing rods are removed from the nuclear reactor.

Therefore, the uranium-containing rods in the diagram should be moved down in order to slow down the fission reactions in its nuclear reactor.

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AnsWER

JANNAH

Explanation:

BECAUSE