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Answer:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. ... This extra carbon dioxide is lowering the ocean's pH, through a process called ocean acidification. Humans create horrible pollution, making climate change.

Answer:

C. Surface area

Explanation:

The rate of  chemical reaction depends on various factors such as:

Effect of surface area of reactants: the rate of a chemical reaction can be increased by increasing the the area of contact of the reacting substances. This is especially important when one or more of the reactants are solids., because only the particles of the solid that are exposed are able to take part in the reaction at each instant of time. Therefore, the greater the surface area of the solid reactant particles the faster the reaction.

The surface area of solid reactants can be increased by grinding or pelletizing, thus allowing for a greater contact between the reacting particles,

The instance in which one of the solid reactants was treated in a coffee grinder before adding to the reaction container is one way of increasing the surface area of a reactant.

Answer:

1. True.

2. False.

3. True.

Explanation:

A. True: An object has acceleration if its velocity is changing. In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

B. False: Force is measured in joules. Force is a product of the mass of an object and its rate of acceleration. Thus, force is actually measured in Newton.

C. Gravity is a force. Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.

Answer:

10 kg

Explanation:

Answer:

Hi I'm happy to meet you and the answer for your question is true. If you need me to state the law ask me

Answer:

Where is kinetic energy the least?, and most?

Explanation:

Least : When the Moon is farthest from Earth in its nearly elliptical orbit, its speed is least. Its kinetic energy has become least, and its potential energy is greatest.

Further : Kinetic energy, form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

May be different for you, but i really hope I helped out.

Answer:

Mars' atmosphere however is 95% carbon dioxide, 3% nitrogen, 1.6% argon, and it has traces of oxygen, carbon monoxide, water, methane, and other gases, along with a lot of dust. Dust hanging in the air colors Martian skies tan in photos taken from the surface. Relative to Earth, the air on Mars is extremely thin.

Explanation:

Answer:

5.2 kg

Explanation:

Answer:

Hey mate....

Explanation:

This is ur answer.....

A pascal is a pressure of one newton per square metre, or, in SI base units, one kilogram per metre per second squared. For example, standard atmospheric pressure (or 1 atm) is defined as 101.325 kPa. The millibar, a unit of air pressure often used in meteorology, is equal to 100 Pa.

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pascal is the SI unit of pressure symbolized by Pa

1 Pa=1N/m^2

1Pa=1kg/ms^2

Answer:

you would fall forward due to inertia of motion..

Answer:

Total internal reflection

Answer: [tex]0\ ms^{-1}[/tex]

Explanation:

Given

If an object reaches the topmost point i.e. it cannot travel beyond that point as its velocity is zero at the topmost point

As some velocity is needed to move the object, so velocity at topmost point is zero

Answer:

I think its B.

Explanation:

Answer:

Organic matter

Explanation:

As organic matter continue to build up in a pond, vegetation will begin to appear in the pond. The first set of vegetation to appear are the floating vegetation. Subsequently, submersed plants begin to grow also.

With time, organic sediments continue to fill the pond and its depth is gradually decreased. A swamp or bog is now formed.

This trend of succession continues until the pond eventually turns into land.

Answer:

[tex]r=7\times 10^{-16}\ m[/tex]

Explanation:

The force between charges, [tex]F=-4.4\times 10^{33}\ N[/tex]

Positive charge, [tex]q_1=8\times 10^{-4}\ C[/tex]

Negative charge, [tex]q_2=-3\times 10^{-4}\ C[/tex]

We need to find the distance between charges. The force of attraction between charges is given by :

[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]

Where

r is the distance between charges

[tex]r=\sqrt{\dfrac{kq_1q_2}{F}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 8\times 10^{-4}\times 3\times 10^{-4}}{4.4\times 10^{33}}} \\\\r=7\times 10^{-16}\ m[/tex]

So, the distance between charges is [tex]7\times 10^{-16}\ m[/tex].

Answer:

what i commented.

Explanation:

Answer:

Earth, Water, Air, Fire.

Explanation:

Answer:

Earth, Water, Air, Fire

Explanation:

Answer:

How much an object has moved

Answer:

The answer is simple machine!!

The crate only moves horizontally, so its net vertical force is 0. The only forces acting in the vertical direction are the crate's weight (pointing downward) and the normal force of the surface on the crate (pointing upward). By Newton's second law, we have

∑ F (vertical) = n - mg = 0   →   n = mg = 1876 N

where n is the magnitude of the normal force.

In the horizontal direction, the crate is moving at a constant speed and thus with no acceleration, so it's completely in equilibrium and the net horizontal force is also 0. The only forces acting on it in this direction are the 747 N push (pointing in the direction of the crate's motion) and the kinetic friction opposing it (pointing in the opposite direction). By Newton's second law,

∑ F (horizontal) = 747 N - f = 0   →   f = 747 N

The frictional force is proportional to the normal force by a factor of the coefficient of kinetic friction, µ, such that

f = µn   →   µ = f / n = (747 N) / (1876 N) ≈ 0.398188 ≈ 0.40

4 because it's closest to the star

Answer:

Explanation:

See attached file for answer.

Complete Question:

The momentum of an object is determined to be 7.2 × 10-3 kg⋅m/s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg = 1000 g).

Answer:

7.2 gm/s.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

[tex] Momentum = mass * velocity [/tex]

Given the following data;

Momentum = 7.2 * 10^-3 kgm/s

1 kg = 1000 g

Substituting the unit in kilograms with grams, we have;

Momentum = 7.2 * 10^-3 * 1000 gm/s

Momentum = 7.2 gm/s.

change in position of an object we use the

symbol ∆×\ delta×∆×for displacement, where ∆. means

"change" ∆ vector quantity with units of distances start

text ,d,I,s,t,a,n,c,e , end text.

Answer:

13 N

Explanation:

From the question,

If two forces act at right angle to each other, Their result force can be calculated using Pythagoras theorem.

R'² = R₁²+R₂²....................... Equation 1

Where R' = Resultant force, R₁ = First force, R₂ = Second force.

Given: R₁ = 12 N, R₂ = 5 N

Substitute these values into equation 1

R'² = 12²+5²

R'² = 144+25

R'² = 169

R' = [tex]\sqrt{169}[/tex]

R' = 13 N.

Hence the resultant force is 13 N

Answer:

A ball moving through the air.

Explanation:

The ball has momentum which is a form of kinetic energy.

I don't know if that is correct, but I hope it helps!!!!