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artcher [175]
3 years ago
6

Please someone help me

Physics
1 answer:
beks73 [17]3 years ago
5 0
New substances are formed by chemical reactions. When elements react together to form compounds their atoms join to other atoms using chemical bonds. For example, iron and sulfur react together to form a compound called iron sulfide. Hopefully this will help you decide...
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How does this relate to Newton's second law?
taurus [48]

Answer:

In ideal case, when no resistive forces are present then both the balls will reach the ground simultaneously. This is because acceleration due to gravity is independent of mass of the falling object. i.e. g = GM/R² where G = 6.67×10²³ Nm²/kg², M = mass of earth and R is radius of earth.

Let us assume that both are metallic balls. In such case, we have to take into account the magnetic field of earth (which will give rise to eddy currents, and these eddy currents will be more, if surface area will be more) and viscous drag of air ( viscous drag is proportional to radius of falling ball), then bigger ball will take slightly more time than the smaller ball.

Explanation:

In ideal case, when no resistive forces are present then both the balls will reach the ground simultaneously. This is because acceleration due to gravity is independent of mass of the falling object. i.e. g = GM/R² where G = 6.67×10²³ Nm²/kg², M = mass of earth and R is radius of earth.

Let us assume that both are metallic balls. In such case, we have to take into account the magnetic field of earth (which will give rise to eddy currents, and these eddy currents will be more, if surface area will be more) and viscous drag of air ( viscous drag is proportional to radius of falling ball), then bigger ball will take slightly more time than the smaller ball.

4 0
3 years ago
Two models of the same compound are shown. In what way is Model B better than Model A? Model B shows the types of elements in th
irina [24]

Answer: Option (B) is the correct answer.

Explanation:

When model B shows three dimensional shape of the molecule then it becomes easier to visualize the exact shape or geometry of the molecule as we get to know how atoms are bonded together.

Therefore, with the help of this it would be easy to know the hybridization of molecule. Basically, we will get to know the type of molecule represented by model B.

Thus, we can conclude that the statement Model B shows the three-dimensional shape of the molecule, but Model A does not represents Model B better than Model A.

6 0
3 years ago
Read 2 more answers
In an evironmental system of subsystem, the mass balance equation is:__________.
kolbaska11 [484]

Answer:

Explanation:

The mass balance is an application of conservation of mass, to the analysis of physical system. This is given in an equation form as

Input = Output + Accumulation

The conservation law that is used in this analysis of the system actually depends on the context of the problem. Nevertheless, they all revolve around conservation of mass. By conservation of mass, I mean that the fact that matter cannot disappear or be created spontaneously.

8 0
3 years ago
A spring gains 2.34 joules of elastic potential
marshall27 [118]

The correct answer to the question is: 4) 74.9 N/m.

EXPLANATION:

As per the question, the stretched length of the spring is given as x = 0.250 m.

The potential energy gained by the spring is given as 2.34 joules.

We are asked to calculate the spring constant of the spring.

The potential energy gained by the spring is nothing else than the elastic potential energy .

The elastic potential energy of the spring is calculated as -

               Potential energy P.E = \frac{1}{2}kx^2

                                            ⇒k = \frac{2P.E}{x^2}

                                                  = \frac{2\times 2.34}{(0.250)^2}\ N/m

                                                  = 74.88 N/m

                                                  = 74.9 N/m.                  [ans]

Hence, the force constant of the spring is 74.9 N/m.


7 0
3 years ago
Read 2 more answers
If Kim’s egg traveled a distance of 10m in 5 seconds, calculate the speed. (Speed=distance/time)
Crazy boy [7]

Answer:

2 meters a second or 2 m/s

8 0
2 years ago
Read 2 more answers
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