Please help 40 points!!!!
choose a scientist from (democritus, john dalton, jj thomson, ernest rutherford, niels bohr, erwin schrodinger or james chadwick) . conduct research using outside sources. be sure to choose reliable resources such as government, scientific, and educational websites. document all research in your own words. be sure to properly cite all sources used in your assignment.
research and respond to the following:


what were experiences in his life that led to his interest in science and the study of the atom? (3-5 sentences paraphrased)


defend his work on the atom and its contribution to the modern atomic model. (3-5 sentences paraphrased)


point out which contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model. (3-5 sentences paraphrased)


works cited: list all of the websites used to find the information. you should have at least 2.

Answer: the airy pattern can only arise from wave propagation

Explanation:if particles went in straight lines through a slit, they would progate linearly and not interfere. The airy pattern arises from diffraction as waves interfere, producing peaks (constructive interference where peaks of waves from each slit coincide) and troughs (destructive interference where peaks and troughs of waves from each slit cancel out). If intensity rather than field is measured nodes occur where 0 values line up instead of troughs

Answer:

The shape of the graph would be a circle

Explanation:

Because the mirror is concave , which it's inner part will be curved.

[tex]\text{Work done,}~W = Pt \\\\~~~~~~~~~~~~~~~~~~~~=5000~W \times 15 ~s\\\\~~~~~~~~~~~~~~~~~~~~=75000~ J[/tex]

Answer:

75kJ

Explanation:

Formula :

Work done = Power × Time

===========================================================

Given :

⇒ Power = 5000 W = 5kW

⇒ Time = 15 seconds

=============================================================

Solving :

⇒ Work done = 5kW × 15s

⇒ Work done = 75kJ

The graph that shows the change in velocity of an object in free fall is graph B.

Velocity is the speed of a body in a specified direction.

It is also defined as the ratio of displacement and tome.

Velocity is a vector quantity.

The change in velocity of a body is known as acceleration.

The velocity of a body undergoing free fall increases by a constant value given as by the acceleration due to gravity.

The graph which depicts this change in velocity is B.

Therefore, the graph that shows the change in velocity of an object in free fall is graph B.

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Answer:

The balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.

Explanation:

Not only does it shrink in cold water but it shrinks in the cold itself.

Hope this helps!!

A TXV with a vapor charge bulb, sometimes referred to as a critical charge bulb, is often called a maximum operating pressure (MOP) valve.

Vapor charge bulb is a charge in a thermostatic expansion valve bulb that boils to a complete vapor. When this point is attained, an increase in temperature will not have any effect on pressure.

The complete evaporation of liquid take place. So, it is also called the critical charge bulb.

Thus, A TXV with a vapor charge bulb, sometimes referred to as a critical charge bulb, is often called a maximum operating pressure (MOP) valve.

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Answer:

Electrons

An elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10- 19 coulombs, a mass of 9.108 × 10 - 31 kilograms, and spin of 1/2, and existing independently or as the component outside the nucleus of an atom. It can also be defined as a unit of charge equal to the charge of one electron.

Air resistance causing thermal energy to be transferred to surroundings is why her increase in kinetic energy is less than her decrease in gravitational potential energy.

This is also known as heat energy and is measured to ascertain the temperature of a substance.

Air resistance brings about loss of heat to the environment and the increase in kinetic energy being less.

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The final speed of the SUV given the data from the question is 9.79 m/s

From conservative of linear momentum,

momentum before impart = momentum after impart

m₁v₁ + m₂v₂ = v(m₁ + m₂)

Thus, we shall determine the final velocity of the SUV by obtaining the velocity after impart. This can be obtained as follow:

v = (m₁v₁ + m₂v₂) / (m₁ + m₂)

v = [(1200 × 5) + (2600 × 12)] / (1200 + 2600)

v = [(6000 + 31200)] / 3800

v = 37200 / 3800

v = 9.79 m/s

Thus, the final velocity of the SUV is 9.79 m/s

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Answer:

50 degrees

Explanation:

the angle between the incident ray and the reflected ray is 80 degrees

80 degrees   +  inc + refl = 180

inc = refl = 50 degrees

Excitability or responsiveness can be referred to as Sensitivity to the environment

Excitability or responsiveness can be defined as an ability possessed by living things that helps them react to the environment according to the vibe or energy they sense.

In conclusion, Excitability or responsiveness can be referred to as Sensitivity to the environment

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Albert Einstein had a growth mindset due to innovative nature.

Albert Einstein had a growth mindset because he did not give up when he face failure. He was very good in math and science but did not get into the school. The reason behind is that Einstein is different from other students. The key component or constant action was focus and devotion to work for Einstein throughout his "miracle year".

So we can conclude that Albert Einstein had a growth mindset due to innovative nature.

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The statement best describes the object's force is the net force is zero.

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

An object is moving across a surface, but it does not gain or lose speed. This means that the body is moving with constant velocity. The constant velocity indicates that the acceleration is zero.
Thus, the net force is zero.

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Answer:

D

friction acts in the opposite direction of motion but does not affect the motion of the object

Answer:D.Friction acts in the opposite direction of motion, slowing the block down.

Explanation:

The direction of force, when electric current and magnetic field direction given is at 90° to the plane containing current I and Magnetic field B.

The force of attraction or repulsion experienced by a magnetic material when it enters the magnetic field.

When a wire with an electric current I is placed in a magnetic field of strength B it experiences a magnetic force F.

According to the Fleming's right hand rule, the direction can be determined by knowing any two parameter's direction.

Thus, The direction of force is at 90° to the plane containing current I and Magnetic field B.

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The momentum before the collision velocity after the collision will be 1237.6 kg m/s² and 6.8 m/sec.

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of hockey player 1= 91.0-kg

(m₂) is the mass of hockey player 2=  91.0-kg

(u₁) is the velocity before collision of hockey player 1 = 5.50 m/s.

(u₂) is the velocity before the collision of hockey player 2=?

a)

Momentum before the collision;

[tex]\rm m_1u_1 + m_2u_2 \\\\ 91.0 \times 5.50 + 91.0 \times 8.1 \\\\ 1237.6 kg m/s^2[/tex]

Momentum before the collision = 1237.6 kg m/s².

b)

The velocity of the two hockey players after the collision from the law of conservation of the momentum as:

Momentum before collision = Momentum after the collision

1237.6 kg m/s² = (m₁+m₂)V

1237.6 kg m/s² =(2 ×91.0-kg )V

V=6.8 m/sec.

Hence, momentum before the collision velocity after the collision will be 1237.6 kg m/s² and 6.8 m/sec.

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The potential energy of a 25 kg bicycle resting at the top of a hill 3 m high will be 735.75 J.

The potential energy is due to the virtue of the position and the height. The unit for the potential energy is the joule.

The potential energy is mainly depending upon the height of the object. when the cyclist is at the highest position, the height is maximum. Therefore, the potential energy is also maximum.

The potential energy is found as;

PE=mgh

PE=25 kg× 9.81 m/s² ×3 m

PE= 735.75 J.

Hence, the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high will be 735.75 J.

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Answer:

(a) The equivalent resistance of three parallel resistors is (R₁R₂R₃)/(R₁R₂ + R₁R₃ + R₂R₃).

(b) The total circuit current is 12/R.eq.

(c) The voltage drop across and current in each resistor is IR₁, IR₂ and IR₃.

The equivalent resistance of three parallel resistors is calculated as follows;

[tex]\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_2}\\\\R_{eq} = \frac{R_1R_2R_3}{R_1R_2 + R_2R_3 + R_1R_3}[/tex]

The total circuit current is calculated as follows;

V = IR

[tex]I= \frac{V}{R_{eq}} = \frac{12 \ V}{R_{eq}}[/tex]

Voltage drop in resistor 1 = IR₁

Voltage drop in resistor 2 = IR₂

Voltage drop in resistor 3 = IR₃

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Answer:

"find an indoor place to exercise"

I think that golf courses call in the golfers if there is a lightning strike within 5 miles of the golf course sensor.

Answer:

4.7 m³

Explanation:

We'll use the gas law P1 • V1 / T1 = P2 • V2 / T2

* Givens :

P1 = 101 kPa , V1 = 2 m³ , T1 = 300.15 K , P2 = 40 kPa , T2 = 283.15 K

( We must always convert the temperature unit to Kelvin "K")

* What we want to find :

V2 = ?

* Solution :

101 × 2 / 300.15 = 40 × V2 / 283.15

V2 × 40 / 283.15 ≈ 0.67

V2 = 0.67 × 283.15 / 40

V2 ≈ 4.7 m³

Answer:

I believe the answer is Maarteb Schmidt as he's the one who discovered quasars.

they float on water because the ice has the same mass of water and is density is lighter

No, a species niche cannot be influenced by interspecific competition. Details about niche can be found below.

The niche of an organism in an ecosystem refers to the function within an ecological system to which an organism is especially suited.

Interspecific competition is the competition for resources between species of different organisms.

Niche of an organism is specific to that organism and this enables it avoid competition for resources in the environment.

This suggests that a species niche cannot be influenced by interspecific competition.

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Answer:

Moving charges

Explanation:

The source of all magnetic fields is moving electric charge: whether it is current in a wire, unpaired electrons in an atomic orbital, convection currents in the earth's liquid nickle /iron core, plasma in the sun, etc. moving electric charge is the source of all magnetic fields.

When an atom changes by alpha decay, its atomic number decreases because of the losing of proton and neutron.

An alpha particles is a helium nucleus that contains 2 protons and 2 neutrons. When the alpha decay occur, the atom loses an alpha particle which causes the loss of proton and neutron thus decreases the mass number as well as atomic number occur.

So we can conclude that When an atom changes by alpha decay, its atomic number decreases because of the losing of proton and neutron.

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Answer:

the first one is the correct answer

Answer:

stuff

Explanation:

1. Waves have different wavelengths

2. Waves are in the ocean

3. Waves can make radio

Sound

1. Sound makes you hear

2. Sound is slower than light

3. There is No sound in space

Light

1. There are many types of light

2. Such as infrared, UV, Microwave

3. Light is the fastest thing in the universe

4. Light cannot escape a black hole

Answer:

-6 x 10^-6  C

Explanation:

The two spheres will equilibrate to the same charge on each

 -6 x 10^-6 C

The two spheres are touched together and then separated. The total number of excess electrons on sphere A is 3.75×10¹³ electrons after the separation.

Electric charge is the physical property of matter that experiences force when it is placed in electric field. F = qE where q is amount of charge, E = electric field and F = is force experienced by the charge. there are two types of charges, positive charge and negative charge which are generally carried by proton and electron resp. like charges repel each other and unlike charges attract each other. the flow charges is called as current. Elementary charge is amount of charge a electron is having, whose value is 1.602 x 10⁻¹⁹ C.

When the spheres touch together, they obtain equal charges. Since the spheres are same in dimension, they obtain equal charges.

Given,

q₁ = −4.0 × 10⁻⁶ C

q₂ = −8.0 × 10⁻⁶ C

q₁ + q₂ = −4.0 × 10⁻⁶ C + −8.0 × 10⁻⁶ C = -12.0 × 10⁻⁶ C

When two charged spheres touch together, they will have equal amount of charge. Means there attain equilibrium of charge.

Hence each charged sphere will have -6.0 × 10⁻⁶ C  of charge.

The number of excess electrons on both the spheres will be,

(6.0 × 10⁻⁶ C) ÷ (1.6 × 10⁻¹⁹C) = 3.75 × 10¹³

The number 1.6 × 10⁻¹⁹C is called as Elementary charge.

Hence the number of excess electrons on Sphere A is 3.75 × 10¹³.

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