List three unique examples of situations in your daily life where expansion and contraction occur.

Answer:

Students should realize that each atom in a group has the same number of electrons in its outermost energy level. For instance, hydrogen, lithium, sodium, and potassium all have 1 electron on their outer energy level. Let students know that these electrons in the outermost energy level are called valence electrons.

Answer:

its fun

Explanation:

I like fun OWo

Answer:

Organic compounds are important because all living organisms contain carbon. They are the basic components of many of the cycles that drive the earth. For example, the carbon cycle that includes the exchange of carbon between plants and animals in photosynthesis and cellular respiration.

Answer:

i believe it's the first one

Explanation:

i'm not entirely sure but i hope this helps :) have a nice day !!

Answer:

repetitions of a certain exercise

Explanation:

Answer:I have to say 56

Explanation: because it is going up by 8

Answer:

30.0 s

Explanation:

i found the answer

Answer:

fff

Explanation:

f

Answer:

True

Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow

Answer:

Explanation:

The examples of electric force are

The charge in a bulb.

Electric circuits.

Static friction between cloth when rubbed by a dryer.

The shock that is felt after touching a doorknob.

Answer:

A Ears

Explanation:

hgvjjghingyjbvh

Explanation:

Number of :

Protons - 83

Neutrons - 126

Electrons - 83

In Bismuth.

Also it has a atomic mass of 208.98038 units.

Answer:

In a permanent magnet, the magnetic field comes from the motion of the electrons inside the material, or, more precisely, from something called the electron spin. The electron spin is a bit like the Earth spinning on its axis. The magnetic field is a vector, the same way the electric field is.

Explanation:

Answer: 20

Explanation:

Answer:

(B) Conduction

Explanation:

Answer:

a ) conduction

Explanation:

it's a because if u think about it a conductor keeps the heat from getting to a certain part of the metal

Answer:

A) Increased levels of atmospheric carbon dioxide

Explanation:

All of the other options are positive effects

Answer:

13.07m/s2 down

Explanation:

I think the equation would be

Fnet/m=a

since tension is the only force mensioned that means that

170N/13.0kg=13.07 m/s2 down

acceleration is down

Answer:

Correct answer is C: Because direction changes.

Explanation:

Hope you have a wonderful weekend.

Answer:

Explanation:

1 ) Momentum of a race car = mass of car x velocity of car . During a collision , an external  force acts on the car which changes the momentum of the car in the direction in which force acts .

2 )

The momentum of the car decreases as external force acts against the momentum . Sometimes when external force is very high , direction of momentum  is reversed .  

3 ) Impulse is force x time of action of force . Generally time of action of force in large collision  is very small . so it is calculated very carefully .

Impulse = change in momentum .

4 ) The type of collision is inelastic . In this type of collision , car crashes into safer barrier , sticks to it . It does not rebound from the barrier . In case of elastic collision , rebound creates large impulse creating huge damage to the car .

Answer:

G is called the constant of gravitation and is equal to 6.67 × 10−11 newton-metre2-kilogram−2.

Explanation:

Explanation:

Given

Mass (m) = 1200 kg

Acceleration (a) = 3 m/s²

Force (F) = ?

We know

F = m * a

= 1200 * 3

= 3600 Newton.

Therefore the force acting on the car is 3600 Newton.

Hope it will help):)

Answer:

3,150,000N

Explanation:

According to Newton's second law;

F = mass * acceleration

Given

Mass = 45000kg

acceleration = 70m/s^2

Substitute

F = 45000 * 70

F = 3,150,000N

Hence the force required to be produced by the rocket engines is 3,150,000N

Answer:

3,150,000 Newtons

Explanation:

F=M*A

F=45,000kg times (*) 70 m/s squared

F=3,150,000N (newtons)

Answer:

Bulb B is the answer

Answer:

C = 1.01

Explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass, [tex]v_t=60\ m/s[/tex]

Area of cross section, [tex]A=0.33\ m^2[/tex]

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

Weight of the object = drag force

R = W

or

[tex]\dfrac{1}{2}\rho CAv_t^2=mg[/tex]

Where

[tex]\rho[/tex] is the density of air = 1.225 kg/m³

C is drag coefficient

So,

[tex]C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01[/tex]

So, the drag coefficient is 1.01.

Answer:

E = 98 J

Explanation:

Given that,

The mass of a ball, m = 1 kg

It is being suspended 10m above the ground & is then dropped.

We need to find the ball's kinetic energy just before it hits that ground. The conservation of energy holds here. It means, the kinetic energy just before it hits that ground is equal to its potential energy i.e.

[tex]E=mgh\\\\E=1\times 10\times 9.8\\\\E=98\ J[/tex]

so, the required energy is 98 J. Hence, the correct option is (b) "98 J".

Answer:

shoulder

it is at the shoulder region

Explanation:

shoulder