please help!!!
Which of the following is an example of chemical weathering?

1. Frost wedging
2. Animal activity
3.Oxidation
4. Abrasion

Answer:

Δs=24 km

Explanation:

vA=74km/h

vB=90km/h

tA=tB=1,5h

Δs=?

sA=vA*tA

sB=vB*tB

Δs=sB-sA

Δs=vB*tB-vA*tA,  tB=tA=t

Δs=t*(vB-vA)

Δs=1,5h*(90km/h-74km/h)

Δs=1,5h*16km/h

Δs=24 km

Answer:

They are chemically inert

Explanation:

Noble gases as the name suggest are gases. So that is one of the similarities that they share. But their more important similar property is that they are chemically inert i.e they are unreactive. This is due ti the fact that they have full outer energy levels which is why they never take part in chemical reactions because their electronic structure is already stable.

Answer:

the answer is 25 m/s

Explanation:

hope this helped out

When it comes to the composition of the Earth, three main types of rock come into play. These are known as metamorphic rock, sedimentary rock, and igneous rock, respectively. Also known as “fire rock” (derived from the Latin “ignus”), these type of rock are the most common type of rock in the Earth’s surface. In fact, combined with metaphoric rock, igneous rock makes up 90 to 95% of all rock to a depth of 16 km from the surface.

Igneous rocks are also very important because their mineral and chemical makeup can be used to learn about the composition, temperature and pressure that exists within the Earth’s mantle. They can also tell us much about the tectonic environment, given that they are closely linked to the convection of tectonic plates. But just how are these rocks formed?

In essence, igneous rocks are formed through the cooling and solidification of magma (or lava). As hot, molten rock rises to the surface, it undergoes changes in temperature and pressure that cause it to cool, solidify, and crystallize. All told, there are over 700 known types of igneous rock, the majority of which are formed beneath the surface of the Earth’s crust. However, some are also formed on the surface as a result of volcanic activity.

Those that fit into the former category are known as intrusive (or plutonic) rocks, while those that fit into the latter are known as extrusive (or volcanic) rock. In addition to these, there is also hypabyssal (or subvolcanic rock), a less common form of igneous rock that is formed within the Earth between plutonic and volcanic rocks. hope that helped

Answer:

Explanation:

Inertia is the property of any object which always resist any change in the object.

Inertia is measured by the mass of the object.

More be the mass of the object, more be the inertia.

Galileo's law of inertia state that, if a body is at rest it always remains at rest and if a body is in motion it remains in motion, until and unless an external force is not applied on the body.

It is also called Newton's first law of motion.

Answer:

A) 3.2 kg ball

Explanation:

To solve this problem we must apply Newton's second law of motion, and it states:

"The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."

[tex]F=m*a[/tex]

Being:

F= net force

m=mass of the object

a= acceleration

As acceleration is inversely proportional to mass, we conclude that to have fastest acceleration Beth should use the lighter ball of 3.2Kg mass.

Ideal mechanical advantage would be from a device with the assumed probability that there is no friction, wear or flexion. It is the ratio of the force put out (load) to the effort (force put into the machine).

Actual mechanical advantage takes into consideration of friction, wear and flexion. It is the ratio of the effort output and the effort input.

Answer:

Ideal mechanical advantage does not considers frictional losses of force into account whereas actual mechanical advantage does.

Explanation:

Mechanical advantage is the increase in the output force by a simple machine which is due to increased arm length on which the output is desired. This is in accordance with the law of conservation of energy and moments.

Mathematically give as;

[tex]F_E.E=F_L.L[/tex]

where:

[tex]F_L\ \&\ F_E[/tex] are the force due to load and effort respectively.

[tex]E\ \&\ L[/tex] are the length of effort arm and load arm respectively.

Now the mechanical advantage:

[tex]MA=\frac{F_E}{F_L} =\frac{L}{E}[/tex]

In practical cases we are not able to take the full advantage of this multiplied force due to the frictional losses.

Answer:

the earth the earth pulls the moon tuords it the earth has more mass and the reason why the moon does not just crash into the moon is

During a collision, two cars experience equal and opposite forces according to Newton's Third Law of Motion, but their accelerations differ due to Newton's Second Law as a less massive car will experience a greater change in velocity.

When one car is twice the mass of the other during a collision, the two cars do indeed experience equal and opposite forces according to Newton's Third Law of Motion. This law states that for every action, there is an equal and opposite reaction. Therefore, no matter the disparity in mass, the forces exerted on each other during a collision are equal in magnitude but opposite in direction. Although the forces are equal, the effect of these forces will differ due to Newton's Second Law of Motion, which links the net force acting on an object to its mass and acceleration (F = ma). A less massive car will experience a greater acceleration (or deceleration) than a more massive car under the same force. This concept is crucial in understanding the dynamics of collisions.

Platelet is not a macro-molecule.

There are four major macro-molecules in living organisms which include; proteins, carbohydrates, lipids, and nucleic acids.

There exist four major macro-molecules in living organisms.

They include; Nucleic acids, proteins, carbohydrates, and lipids.

Keywords: Macro-molecules, nucleic acids, proteins, carbohydrates, lipids

Level: High school  

Subject: Biology  

Topic: Macro-molecules

Out of the options given, Platelet is not a macromolecule. Macromolecules are large complex molecules like proteins, carbohydrates, and lipids. Platelets are blood cells that help in clot formation.

Out of the options given A. Carbohydrate, B. Protein, C. Platelet, and D. Lipid, C. Platelet is not a macromolecule. Macromolecules are large complex molecules such as proteins, carbohydrates, lipids, and nucleic acids that are essential for life. They are composed of smaller units bonded together. Platelets on the other hand, are tiny blood cells that help your body form clots to stop bleeding. Therefore, they do not fall under the classification of macromolecules.

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Newton's law of gravitation says that the magnitude f of the force exerted by a body of mass m on a body of mass m is f = Gmm/r² where G is the gravitational constant and r is the distance between the bodies. Then df/dr = Gmm(-2/r³).

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The gravitational constant, denoted by the capital letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity.

f = Gmm/r²

df/dr = Gmm(-2/r³).

Newton's law of gravitation says that the magnitude f of the force exerted by a body of mass m on a body of mass m is f = Gmm/r² where G is the gravitational constant and r is the distance between the bodies. Then df/dr = Gmm(-2/r³).

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Answer:

Waves interact with  

⇒ objects and other  

⇒ waves.

Explanation:

Answer:

The magnitude is [tex]2000N[/tex]

Explanation:

To solve this question we are going to use the second Newton law.

The second Newton law states that the acceleration of an object is directly proportional to the net force which acts on the object and inverse proportional to the mass of the object ⇒

[tex]a=\frac{F}{m}[/tex]

Which can also be written as :

[tex]F=m.a[/tex] (I)

Where F is the force

Where m is the mass of the object and where ''a'' is the acceleration.

In the problem, we know that

[tex]m=1000kg[/tex]

[tex]a=2\frac{m}{s^{2}}[/tex]

If we replace in the equation (I) :

[tex]F=(1000kg).(2\frac{m}{s^{2}})=2000(kg.\frac{m}{s^{2}})[/tex]

The unit [tex]kg.\frac{m}{s^{2}}[/tex] is defined as N which is called Newton. N is an unit of force.

Finally, the net force exerted on the car is [tex]2000N[/tex]

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the number of neutron is 10.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Atomic number= number of proton=number of electron

Mass number= number of proton/electron + number of neutron

Mass number=19

atomic number =9

substituting all the given values in the above equation, we get

19=9 + number of neutron

number of neutron=10

Therefore, the number of neutron is 10.

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The electron, ejected horizontally and not influenced by external forces such as gravity, magnetic, or electric fields, would have a vertical displacement of zero and thus would travel directly to the screen without any vertical deviation.

An electron ejected horizontally with a speed of 1.5 × 106 m/s from an electron gun will continue to move in a straight line horizontally in the absence of any external forces. Since there is no mention of gravity, magnetic fields, or electric fields in the stated problem that could cause the electron to deviate from its path, the vertical displacement of the electron before hitting the screen would be zero if we disregard such forces. Hence, the electron will travel horizontally and hit the screen without any vertical displacement.

Answer: A

Explanation:

the correct answer is a discovery