PLEASE ANSWER ASAP! It would be EXTREMELY appreciated if you could answer both. These are free responses, so try to make your answer somewhat original. Thanks in advance! And I will mark brainliest!

Answer:

The maximum possible speed is 4.85 m/s.

Explanation:

The Principle Of Conservation Of Mechanical Energy

In the absence of friction, the total mechanical energy is conserved. It means that :

[tex]E_m=U+K[/tex] is constant, being U the potential energy and K the kinetic energy

U=mgh

Where m is the mass of the object, g is the gravitational acceleration and h is the height from a fixed reference.

[tex]\displaystyle K=\frac{mv^2}{2}[/tex]

Where v is the speed.

When the person is at a maximum height of 2 meters, the speed is 0. Thus the mechanical energy is made only of potential energy.

Let's fix the reference for the height to the point where the person is at minimum height (1 m from the ground level). The maximum height with respect to this reference is h=2.2 m - 1 m = 1.2 m.

The potential energy is:

U = m*9.8*1.2

U = 11.76m

When the person is at the minimum (zero) height, the mechanical energy is made only of kinetic energy. Since the mechanical energy is conserved, then:

[tex]\displaystyle \frac{mv^2}{2}=11.76m[/tex]

Multiplying by 2 and simplifying by m:

[tex]v^2=2*11.76=23.52[/tex]

Solving for v:

[tex]v=\sqrt{23.52}=4.85[/tex]

[tex]\boxed{v=4.85}[/tex]

The maximum possible speed is 4.85 m/s.

Answer:

The  repulsive electrostatic force between two of the protons is 14.4 N.

Explanation:

Given;

distance between the two protons, r = 4 x 10⁻¹⁵ m

charge of a proton, q = + 1.6 x 10⁻¹⁹ C

The repulsive electrostatic force between two of the protons is calculated by applying Coulomb's law;

[tex]F = \frac{k q_1 q_2 }{r^2} \\\\where;\\k \ is \ Coulomb's \ constant = 9\times 10^9 \ Nm^2/C^2 \\\\F = \frac{9\times 10^9 \ (1.6\times 10^{-19})^2}{(4 \times 10^{-15})^2} \\\\F = 14.4 \ N[/tex]

Therefore, the  repulsive electrostatic force between two of the protons is 14.4 N.

Answer:

Hi... Your answer is angular acceleration

Answer:

In both cases the height is greater than 10.3 m

Explanation:

Pressure is defined by the relationship

       P = F / A

in this case the force is the weight of the two gases

       F = W = m g

If we use the definition of density

      ρ = m / V

      V = A h

      m = ρ A h

we substitute

       P = ρ g h

       h = [tex]\frac{P}{\rho g}[/tex]

For this case the density of the gases is

       ρ' = 0.9 [tex]\rho_{water}[/tex]

       h =[tex]\frac{P}{0.9 \ \rho_{water} g}[/tex]

we calculate

     ρ’= 0.9 \rho_{water}

     h = 1 105 / (0.9 1000 9.8)

     h = 11.3 m

      ρ’= 0.8 \rho_{water}

       h = 1 105 / (0.8 1000 9.8

       h = 12.8 m

In both cases the height is greater than 10.3 m

Answer:

In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction.

Explanation:

The three tenets to the cell theory are as described below:

All living organisms are composed of one or more cells.

The cell is the basic unit of structure and organization in organisms.

Cells arise from pre-existing cells.

There is no universally accepted definition of life. Some biologists consider non-cellular entities such as viruses living organisms,[1] and thus reasonably disagree with the first tenet. Throughout this article, it will lead you through the history of cell theory, how the discovery of cells was made possible, what the cell theory has become today and background information and history regarding other opposing concepts of cell theory.

Answer:

It would take 16.7 s for the work to be done by the engine.

Explanation:

From the question, given: Power = 390.3 kW

                                           Work to be done = 6.5 x [tex]10^{6}[/tex] J

But, power and work done with respect to time, has a relationship of:

Power = [tex]\frac{work done}{time}[/tex]

So that,

time = [tex]\frac{work done}{Power}[/tex]

Thus,

time  = [tex]\frac{6.5*10^{6} }{390.3*10^{3} }[/tex]

       = 16.6539

time = 16.7 s

Time required is 16.7 seconds.

Thus, it would take 16.7 s for the work to be done by the engine.

Answer:

Stringed instruments (chordophones).

Explanation:

Musical instruments that produce sound by vibration of a stretched string are called stringed instruments (chordophones).

Some examples of stringed instruments are guitar, piano, harp, violin, sitar etc.

A guitar can be defined as a musical instrument with six or twelve strings and a long fretted fingerboard that are being played using a plectrum or by strumming (plucking) with the fingers, usually in a downward direction.

Basically, a guitar is a musical instrument that produces sound through regular vibrations and as a result of this, it is used for creating uniform and melodious sounds.

Answer:

f = 1/t

1/1

=1

Explanation:

The frequency f = 1/T = ω/2π of the motion gives the number of complete oscillations per unit time. It is measured in units of Hertz, (1 Hz = 1/s).

Answer:

It is found that W1 - W2 loss in weight of solid when immersed in water is equal to the weight of the water displaced by the body. This verifies Archimedes' principle.

Answer:

Answer:

speed described how fast the object moves velocity describes how fast and in what direction its moved..

Answer:

A balanced force means that equal force is being applied to an object on opposite sides. If equal force is being applied, there will be no change in the motion of the object; it will remain stationary. A greater force needs to be applied to one side for movement to take place.

Explanation:

Hope this helps (づ｡ ◕‿‿◕｡) づ

Love ya

Answer:

See the answers below.

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]y=y_{o}+v_{o}*t+0.5*g*t^{2}[/tex]

where:

y = final elevation [m]

yo = initial elevation = 0

vo = initial velocity = 19.6 [m/s]

t = time required [s]

g = gravity acceleration = 9.81 [m/s²]

Now we can replace the different times in the equation above.

For  t = 1 [s]

[tex]y=0+(19.6*1)-0.5*9.81*(1^{2} )\\y = 14.7 [m][/tex]

For  t = 2 [s]

[tex]y=0+(19.6*2)-0.5*9.81*(2^{2} )\\y = 19.58 [m][/tex]

For  t = 3 [s]

[tex]y=0+(19.6*3)-0.5*9.81*(3^{2} )\\y = 14.7 [m][/tex]

For  t = 4 [s]

[tex]y=0+(19.6*4)-0.5*9.81*(4^{2} )\\y = -0.08 [m][/tex]

We can see that the sign of gravitational acceleration is negative, since it points in the opposite direction to the motion of the launch.

Note when the time is equal to 4 seconds we see that the distance is 0, ie the tennis ball has reached its maximum height and begins to descend.

Answer:

The difference between colloid and emulsion is that a colloid can form when any state of matter (solid, liquid or gas) combine with a liquid whereas an emulsion has two liquid components which are immiscible with each other

Explanation:

Answer:

to be an eginere u would have to go to college and study hard

Explanation:

Answer:

A. 2m/(s^2)

I hope it will be useful.

Answer: 1333 m

the length of runway it will need is S = [tex]\frac{90^{2}-10^{2} }{2.3}=1333[/tex] (m)

Explanation:

Answer:

See explanation

Explanation:

To find out the electronic structure of each element, you must know the number of electrons it contains.

If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.

Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.

The solution to this task is f00king Dis.

Answer:

mountains, earthquakes, tsunamis

Explanation:

Answer:

5 or 6

Explanation:you

Answer:

The 3rd graph

Explanation:

The graph that says:

Fn = 27 N

Ff= -102 N

Fp= 34 N

Fg= -27 N

[tex]volume \: = 250 \: ml \\ 1 \: ml = 1 {cm}^{3} \\ 250 \: ml = (1 \times 250) = 250 {cm}^{3} \\ mass \: = \: \frac{density}{volume} \\ mass \: = \: \frac{1.84}{250} \\ mass \: = \: 0.00736 \: g[/tex]

The mass of the sulfuric acid will be 0.00736 g.

A physical body's mass is the amount of matter it contains. This is also a measurement of inertia of a particular body, or resistance to acceleration whenever a net force will be applied.

Calculation of mass.

Given data:

density (d) = 1.84 g/cm

volume (v) = 250 ml

Now, use the mass formula.

Mass (m) = density (d) / volume (v)

Mass (m) = 1.84 / 250

Mass (m) = 0.00736 g

Therefore, the mass of the sulfuric acid will be 0.00736 g.

To know more about mass.

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Answer:

1. The two main types of waves are body waves and surface waves. Body waves can travel through the earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water. Earthquakes radiate seismic energy as both body and surface waves.

2. potential energy

3. Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

4. Refraction is the bending of light

5. Density uses the formula p=m/V, or density (p) is equal to mass (m) divided by volume (V). Density is defined as mass per unit volume.

Explanation:

Answer:

Its B- overconfidence

Explanation:

The tendency to have more confidence in judgment and decisions than one should is called Overconfidence

Overconfidence  is a bias in which a person's subjective confidence is his or her judgement is reliably greater then the objective accuracy of those judgments when confidence is relatively high

Hence, The tendency to have more confidence in judgment and decisions than one should is called Overconfidence

correct answer : option B)Overconfidence

Learn more about  Overconfidence :

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Answer:

The illuninance being multiplied by 9

Explanation:

Answer:

The illuminance will be multiplied by 9.

Explanation:

Answer:

Hi... Your answer is B... a is not work because work is ziro

Answer:

stationary object with no outside force will not move. With no outside forces, a moving object will not stop. An astronaut who has their screwdriver knocked into space will see the screwdriver continue on at the same speed and direction forever. There are no forces acting on the screwdriver from friction.