Please can I have help. This was ment to be due 1 week ago

Answer:

Your muscles need oxygen to perform their function, and a reduction in the oxygen making its way to them means that muscles don't work as effectively. ... These negative effects are why most athletes don't smoke.

Explanation:

Answer:

150 I would believe that it is the correct answer

Answer:

D. Freely moving electrons hold the magnesium atoms together, and

the attraction of opposite charges holds the aluminum and iodine

atoms together.

Explanation:

The chemical bonding between atoms of magnesium (Mg) different  from the chemical bonding is Option D.

The following information should be considered:

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Answer:

30mph

Explanation:

7.5 miles / .25 hours = 30 mph

Answer:

Transverse Wave

Explanation:

Longitudinal: vibrates in the same direction

Propagated: the direction the wave travels (specific to wave type)

Amplitude: from equilibrium to crest or trough

Answer:

can't do it here

Explanation:

can't draw in here sorry dude

Answer:

SCMaglev, Located in Japan

Explanation:

Answer:

0.83m/s forward

Explanation:

Velocity is the displacement divided by time.

  Velocity  = [tex]\frac{displacment}{time}[/tex]

 Displacement is the distance moved in a specific direction;

         → 6meters forward  

         ← 3meters backwards

        → 7 meters forward

 Net displacement =7m  + 3m = 10m forward

 So;

   Velocity  = [tex]\frac{10}{12}[/tex] = 0.83m/s forward

Answer:

I dont know what to answer so im just gonna say ok

Answer:

ca is carbon dioxide h20 is water

Explanation:

Answer:

As you may know, each element has a "fixed" number of protons and electrons.

These electrons live in elliptical orbits around the nucleus, called valence levels or energy levels.

We know that as further away are the orbits from the nucleus, the more energy has the electrons in it. (And those energies are fixed)

Now, when an electron jumps from a level to another, there is also a jump in energy, and that jump depends only on the levels, then the jump in energy is fixed.

Particularly, when an electron jumps from a more energetic level to a less energetic one, that change in energy must be compensated in some way, and that way is by radiating a photon whose energy is exactly the same as the energy of the jump.

And the energy of a photon is related to the wavelength of the photon, then we can conclude that for a given element, the possible jumps of energy levels are known, meaning that the possible "jumps in energy" are known, which means that the wavelengths of the radiated photons also are known. Then by looking at the colors of the bands (whose depend on the wavelength of the radiated photons) we can know almost exactly what elements are radiating them.

Answer:

height =15m

Explanation:

gpe=mgh

750=5×10×x

50x=750

x=15

hope it helps

Answer:

I believe the answer is D or B mostly D

Explanation:

Answer:

0.6m/s

Explanation:

Given parameters:

Wavelength = 2m

Frequency  = 0.3hz

Unknown:

Speed of the wave  = ?

Solution:

To find the speed of the wave, we must understand that this parameter depends on the frequency and wavelength of the wave.

So;

        V = f∧

F is the frequency

∧ is the wavelength

 Now, insert the parameters and solve;

 V  = 0.3 x 2 = 0.6m/s

Answer:

Explanation:

Step one:

given

mass m= 24kg

distance moved= 6m

time taken= 4seconds

Step two:

Required

power

but work done is the force applied at a distance, and the power is the work done time the time taken

Work done= F*D

F=mg

W= mg*D

W=24*9.81*6

W=1412.6J

Power P= work * time

P=1412.6*4

p=5650.5W

P=5.6kW

Answer: answer is in explanation

Explanation:

A doorknob - about 10cm for diameter and the force that causes the torque comes from the person turning the doorknob causing friction. It’s used to open and close doors.

A screwdriver- 2m for diameter and the force that causes the torque comes from the person applying pressure and causing the screwdriver to turn with friction. It’s used to screw a screw into the wall or into an object.

Car wheels- about 12inches in diameter and the force that causes the torque comes from the engine’s chemical force and friction against the road. They’re used to make a car go and stop.

Electric fan- 14 inches in diameter and the force for torque comes from the electricity circulating from the fan making it spin to provide the air coming out of the fan. They’re used to provide people with air as a cooling system.

Pizza cutter- 10cm in diameter and the force for torque comes from the pressure being applied on the handle and the friction between the pizza and the pizza cutter. They’re used to cut pizza.

Winch

Analog clock

Windmill

Water wheel

Skateboard

The different types of wheels that we see very often is doorknob, screwdriver, cartwheels, an electric fan and pizza cutter.

The rotatable counterpart of linear force in mechanics and engineering is torque. Depending on the context of study, it is also known as a moment, point in time of force, rotating force, or turning effect.

A doorknob with a diameter of around 10 cm creates the torque because of friction created by the person twisting the doorknob. Doors are opened and shut with it.

A screwdriver with a diameter of 2 meters produces a torque when someone applies pressure, making the screwdriver turn against resistance. It is employed to fasten a screw to a surface or an item.

Car wheels are roughly 12 inches in diameter, and the torque is produced by the chemical force of the engine and friction with the ground. They are utilized to start and stop vehicles.

Electric fan with a 14-inch diameter; the energy running through the fan causes it to spin, producing the air that flows from the fan. They serve as a conditioning system by providing air to individuals.

Pizza cutter, diameter 10 cm; torque produced by the resistance between the pizza as well as the pizza cutter, as well as pressure applied to the handle. The pizza is cut using these.

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Answer:

2.3s

Explanation:

The total time in flight is 2.3s.

Therefore, the time it takes the canon ball to reach its peak is also the total time of flight is 2.3s.

Answer:

B

Explanation:

using f=ma

a=f/m

=4000/2000

=2 m/s2

Answer: a  I guess

Explanation:

I ate a potato with my most pullged for science i tasted it not good

Answer:

a) Q = 12600000 [J]

b) t = 4200 [s] or 70 [min]

Explanation:

To solve this problem we must use the following equation that is defined as the heat equation, this equation relates the mass to the specific heat and temperature changes.

Q = m*Cp*(T_f - T_i)

where:

Q = energy as heat [J] (units of Joules)

Cp = specific heat = 4200 [J/Kg * °C]

T_f = final temperature = 60 [°C]

T_i = initial temperature = 10 [°C]

m = mass = 60 [kg]

Q = 60*4200*(60 - 10)

Q = 12600000 [J]

b)

To calculate the time, we know that the power is equal to the energy generated over the given time.

P = Q/t

where:

P = power = 3000 [W]

t = time [s]

t = Q/P

t = 12600000/3000

t = 4200 [s] or 70 [min]

Answer:

D. 6 m/s²

Explanation:

Given parameters:

Initial velocity  = 36m/s

Final velocity  = 0m/s

Time taken = 6s

Unknown:

Acceleration of the car  = ?

Solution:

Acceleration is the rate of change of velocity with time;

 Mathematically;

     Acceleration   = [tex]\frac{v - u}{t}[/tex]

v is the final velocity

u is the initial velocity

t is the time

 Acceleration  = [tex]\frac{0 - 36}{6}[/tex]   = -6m/s

The acceleration of the car must have been 6m/s²

Answer:

Explanation:

Commonly area is a scalar quantity because there is no need of direction to define and also follow the algebrac summation. When we talk about vector there exist a frame of reference with a certain orogin

Answer:

Transformers

Explanation:

Transformers are things that changer the amount of voltage in an electric line.

Answer:

The behavior of an object that has been charged is dependent upon whether the object is made of a conductive or a nonconductive material. Conductors are materials that permit electrons to flow freely from particle to particle. An object made of a conducting material will permit charge to be transferred across the entire surface of the object. If charge is transferred to the object at a given location, that charge is quickly distributed across the entire surface of the object. The distribution of charge is the result of electron movement. Since conductors allow for electrons to be transported from particle to particle, a charged object will always distribute its charge until the overall repulsive forces between excess electrons is minimized. If a charged conductor is touched to another object, the conductor can even transfer its charge to that object. The transfer of charge between objects occurs more readily if the second object is made of a conducting material. Conductors allow for charge transfer through the free movement of electrons.

In contrast to conductors, insulators are materials that impede the free flow of electrons from atom to atom and molecule to molecule. If charge is transferred to an insulator at a given location, the excess charge will remain at the initial location of charging. The particles of the insulator do not permit the free flow of electrons; subsequently charge is seldom distributed evenly across the surface of an insulator.

While insulators are not useful for transferring charge, they do serve a critical role in electrostatic experiments and demonstrations. Conductive objects are often mounted upon insulating objects. This arrangement of a conductor on top of an insulator prevents charge from being transferred from the conductive object to its surroundings. This arrangement also allows for a student (or teacher) to manipulate a conducting object without touching it. The insulator serves as a handle for moving the conductor around on top of a lab table. If charging experiments are performed with aluminum pop cans, then the cans should be mounted on top of Styrofoam cups. The cups serve as insulators, preventing the pop cans from discharging their charge. The cups also serve as handles when it becomes necessary to move the cans around on the table.

Electrical conductors are made up of metals such as, copper, aluminum, etc. These metals are used to make wires. Most wires are made out of copper because it conducts electricity with high flexibility and very little resistance.

"A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it. In a conductor, electrical charge carriers, usually electrons or ions, move easily from atom to atom when voltage is applied."

"Electricity is both a basic part of nature and one of the most widely used forms of energy. The electricity that we use is a secondary energy source because it is produced by converting primary sources of energy such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power."

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Answer:

420m

Explanation:

Given parameters:

Time  = 5minutes

Average speed  = 1.4m/s

Unknown:

Distance covered  = ?

Solution:

Speed is the rate of change of distance with time.

 Mathematically;

              Speed  = [tex]\frac{distance}{time}[/tex]  

    Distance  = speed x time

Insert the parameters and solve;

   Convert the time to seconds;

              1 minute = 60s

               5 minute = 5  x 60 = 300s

So,

   Insert the parameters and find the distance;

     Distance  = 300 x 1.4  = 420m

Answer:

[tex]a=0.1\ m/s^2[/tex]

Explanation:

Given that,

Initial velocity, u = 0

Final velocity, v = 2 m/s

Time, t = 20 s

We need to find the acceleration of the swimmer. The acceleration of an object is equal to the change in velocity per unit time. It can be given by :

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{2\ m/s}{20\ s}\\\\a=0.1\ m/s^2[/tex]

So, her average acceleration of the swimmer is [tex]0.1\ m/s^2[/tex].

Answer:

yes____________??__________

Answer:

C. rollback

Explanation:

The retina of the eye is located inside the eye making it impossible for the retina to roll back. Only the eye itself can rollback.

The vertical forces cancel, so only the horizontal forces are included in the net force. If the right is positive and the left is negative, then

50 N + (-20 N) = 30 N

so the net force is (B) 30 N to the right.

Answer:

(B) 30 N to the right.

Explanation:

Answer

D. move a small magnet back and forth within a section of the coiled wire.

Explanation:

i put that for the test and i got it right

Answer:

d

Explanation: got it right