Kepler found that the orbits of the planets flowed three laws (rayed disk),(black dot) and maybe (symbols) hopes this helps out for you
Kepler took Brahe's detailed descriptions and measurements of the motion of the planets in the sky over many years, and derived his 3 laws of Planetary Motion based purely on what Brahe saw.
A hundred years AFTER Kepler, Newton proposed his Law of Universal Gravitation.
Using his own Law of Universal Gravitation, along with his laws of motion, Newton showed that IF his "laws" were correct, then planets HAVE TO move exactly according to Kepler's laws. (He had to invent Calculus in order to demonstrate this.)
This was an awesome, powerful confirmation of Kepler's work and Newton's work. Boat uvum.
In my Physics courses, I used to be able to take Newton's laws of gravity and motion, fold in some calculus and some geometry, mix until smooth, and derive Kepler's laws of planetary motion. But that was long ago, in a galaxy far away, and, sadly, ya don't get to use it very often as an Electrical Engineer. So I imagine it's still true, but I can't prove it now.
Check all choices below that are correct. Increasing the frequency increases the current. Changing the frequency does not affect the current. Voltage leads current. Current and voltage are in phase. Changing ΔVmax does not affect the current. Changing the resistance does not affect the current. Increasing ΔVmax decreases the current. Increasing the resistance increases the current. Increasing the resistance decreases the current. Increasing ΔVmax increases the current. Current leads voltage. Increasing the frequency decreases the current.
Answer:
the experyoeyv
Explanation:
EACH of these statements CAN be true or false. They ALL depend on the situation, and on the components of the particular circuit.
For each of these statements, I can give you the diagram of a circuit in which the statement is true, and I can give you the diagram of another circuit in which the same statement is false.
These choices are usually true:
-- Changing the frequency does not affect the current.
-- Increasing the resistance decreases the current.
-- Increasing ΔVmax increases the current.
These choices are usually false:
-- Increasing the frequency increases the current.
-- Changing ΔVmax does not affect the current.
-- Changing the resistance does not affect the current.
-- Increasing ΔVmax decreases the current.
-- Increasing the resistance increases the current.
-- Increasing the frequency decreases the current.
These choices can go either way just as easily:
-- Voltage leads current.
-- Current and voltage are in phase.
-- Current leads voltage.
Earth is closest to the sun at a point called
Answer:
It is called Perihelion.
Explanation:
Which radiation has no electric charge associated with it?
Gamma radiation has no electric charge associated with it.
Explanation:The radiation that has no electric charge associated with it is gamma radiation. Gamma radiation is a form of electromagnetic radiation that is extremely high in energy. It is emitted during radioactive decay or nuclear reactions and does not carry an electric charge.
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Gamma rays are the type of radiation that carries no electric charge. They are uncharged electromagnetic waves, unlike alpha and beta particles, which carry positive and negative charges respectively.
Explanation:The type of radiation that has no electric charge associated with it is gamma radiation or gamma rays. Unlike alpha and beta particles, gamma rays are neither positively nor negatively charged. They are electromagnetic waves that are uncharged. Alpha particles, carrying two protons, have a net charge of +2, and beta particles, carrying one electron, have a net charge of -1. On the hand, gamma rays, being solely photons or light, carry no charge. They remain unaffected by electric and magnetic fields, indicating their neutral charge.
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How many joules of heat are absorbed to raise the temperature of 435 grams of water at 1 atm from 25°c to its boiling point?
Explanation:
The amount of heat [tex]Q[/tex] absorbed in the temperature variation of a material is:
[tex]Q=m. c. \Delta T[/tex] (1)
Where:
[tex]m=435g[/tex] is the mass of water
[tex]c[/tex] is the specific heat of the element. In the case of water [tex]c=1 cal/g\°C [/tex]
[tex]\Delta T[/tex] is the variation in temperature, which in this case is [tex]\Delta T=100\°C-25\°C=75\°C[/tex]
(The boiling point of water at the pressure of 1 atm is [tex]100\°C[/tex])
Rewriting equation (1) with the known values:
[tex]Q=(435g)(1 cal/g\°C)(75\°C)[/tex]
(2)
[tex]Q=32625 cal[/tex] (3)
Nevertheless, we are asked to find this value in Joules. So, we have to convert this 32625 calories to Joules, knowing the following:
[tex]1 cal=4.187 J[/tex] (4)
Hence:
[tex]Q=32625 cal=136600.875 J=136.6kJ[/tex]
central air conditioner uses 4.5 kilowatts. It runs for 5 hours over the course of a day. How much energy does the air conditioner use during that day? 9.5 kilowatt-hours 0.5 kilowatt-hours 0.9 kilowatt-hours 22.5 kilowatt-hours
Energy = (power) x (time)
Energy = (4.5 kW) x (5 hours)
Energy = (4.5 x 5) kW-h
Energy = 22.5 kW-h
Answer:
See below.
Explanation:
That would be 4.5 * 5 = 22.5 kilowatt hours.
In which city did the wright brothers take off on their very first flight
The Wright brothers, Wilbur and Orville, were pioneers of aviation, since they flew in a device heavier than air, which was inconceivable at that time.
Their first successful flight was on December 17th, 1903 in Kitty Hawk, North Carolina, which lasted only 12 seconds in which their plane (the Flyer I, with 341 kg, 6.4 m long and a wingspan of 12.3 m) traveled 37 m without touching the ground. This was achieved through the help of an external catapult that "threw" them into the air.
It should be noted that the Wright brothers only studied until high school, however, their passion for solving the problem of the human inability to fly, their perseverance and experience acquired over the years in their bicycle company, led them to reach that goal. An achievement that marked the beginning of the aviation era.
A pump, submerged at the bottom of a well that is 35 m deep, is used to pump water uphill to a house that is 50 m above the top of the well, as shown above. The density of water is 1,000 kg/m3. Neglect the effects of friction, turbulence, and viscosity. (a) Residents of the house use 0.35 m3 of water per day. The day’s pumping is completed in 2 hours during the day. i. Calculate the minimum work required to pump the water used per day ii. Calculate the minimum power rating of the pump. (b) In the well, the water flows at 0.50 m/s and the pipe has a diameter of 3.0 cm. At the house the diameter of the pipe is 1.25 cm. i. Calculate the flow velocity at the house when a faucet in the house is open. ii. Calculate the pressure at the well when the faucet in the house is open.
Answer:
0.45
Explanation:
Massive stars terminate in a brilliant explosion called a
Answer:
Supernova
Explanation:
A supernova explosion occurs when a high mass star ends its life cycle.
When a very massive star runs out of hydrogen used in the core for the nuclear fusion, it starts burning heavier and heavier elements (helium, carbon, etc.). However, this process stops when the star has burnt all elements lighter than iron: in fact, nuclear fusion of the iron cannot occur, since the process releases less energy than the amount of energy needed to start it. At this point, therefore, the star can no longer produce energy by nuclear fusion, and there is no longer any outward pressure that can counterbalance the gravitational force of the star, pushing inward: as a result, the star collapses under the action of gravity, and the outer layers "bounce off the core" producing a huge explosion called supernova.
The remnant of the supernova explosion is, depending on the mass of the star, a neutron star or a black hole.
Final answer:
Massive stars end their life cycle in a spectacular explosion called a supernova, with type II being associated with massive star collapse and type Ia with white dwarf explosions.
Explanation:
Massive stars terminate in a brilliant explosion known as a supernova. This explosion is one of the most spectacular celestial events and happens when a massive star collapses at the end of its life cycle. There are different types of supernovae, but the one caused by the collapse of a massive star is specifically called a type II supernova. Moreover, when white dwarfs explode due to gathering too much mass, they are termed type Ia supernovae, leaving behind no remnant. The death of very massive stars that do not explode in a supernova can lead to the formation of a black hole, adding another layer of complexity to stellar evolution.
What is the relationship between atoms and elements
Atoms and elements are pure substances.
Elements are pure substances made up of one type of atom. Atoms are the smallest unit of an element and include protons, neutrons and electrons. The number of protons in an atom defines the element it represents.
Explanation:The relationship between atoms and elements is foundational to the study of chemistry. Elements are pure substances that consist of only one type of atom. For instance, the element gold is made up of only gold atoms, and the element oxygen is made up of only oxygen atoms.
Atoms are the smallest unit of an element that retains the properties of that element. They are composed of protons, neutrons and electrons. The number of protons in an atom determines the element it represents. For example, an atom with one proton is a hydrogen atom, whereas an atom with six protons is a carbon atom.
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Describe the type of radioactive emission produced from the decay of carbon-14 to nitrogen-14 and predict its reaction to an electric field.
Answer:
A beta emission(negatron)
Explanation:
1. A negatron resembles an orbital electron. It is represented as β⁻.
A negatron has a mass number of 0 but with a charge of -1
The decay of C-14 to N-14 can be depicted below:
¹⁴₆C → ¹⁴₇N + ₋₁⁰e
Both the mass number and atomic number is balanced according to the reaction.
2. In an electric field, the emission produced would be deflected towards the positive pole because it is negatively charged.
Beta radioactive emission
During this radioactive decay, Beta charges are released. These negative particles tend to be attracted to the positive plate in the electric field.
The radioactive decay of C-14 produces a N-14 atom through the emission of Beta particles.
The Beta particles are negatively charged and would be attracted to the positive plate in the electric field because according to law of charges, like charges will tend to repel each other while unlike charges will attract each other.
consider the two forces acting on a person who stands still, namely ,the downward pull of gravity and the upward support of the floor. are these equal or opposite? do they comprise an action-reaction pair? why or why not?
The downward force of your weight on the floor and the upward force of the floor against the bottom of your shoes are an action-reaction pair.
Those two forces against the soles of your shoes are equal and opposite forces. If they were not equal and opposite, then they would add up to something that would not be zero. There would be some NET force there, and the soles of your shoes would be accelerating up or down. Since they're NOT doing that, and you're just standing there motionless, there can't be any net force there. Those two forces must exactly add up to zero.
Answer:
two forces such as weight and normal that are in the same body are not the force of action and reaction
Explanation:
Newton's third law says: "If two bodies interact the force exerted by the body 1 on the body 2 is of equal magnitude and opposite to the force exerted by the object 2 on the 1"
Let's analyze this sentence in our case, the bodies are the Earth and the chair
The Earth pulls the body creating its weight at the same time the body pulls the Earth, with an equal force, notice that each force is applied to a different body, so they cannot be added. These are forces of action and reaction
The chair does not accelerate due to its weight because it is supported by the floor, but it creates a very small deformation that creates a response called Normal force to this support, applied to the chair. The force of the deformation is applied to the floor. These are forces of action and reaction.
Therefore two forces such as weight and normal that are in the same body are not the force of action and reaction
Name three categories that are used to classify the elements in the periodic table?
Answer:
metals,nonmetals, and inert gases
Explanation:
Metals, non-metal and noble gases are the three categories useful for classifying the elements in periodic table.
Explanation:
Elements are defined as a vertical group and a horizontal period in periodic table. Metals, non-metal and noble gases are the three categories useful for classifying the elements in periodic table.
A large number of elements in periodic table flow under the Metals category. Non-metal in the table are mostly gaseous. Noble gases in the table are colorless and non-reactive.
which type of magnet is created from an electromagnet
a) permanent
b) temporary
c) variable
d) rotating
I think the answer is c
______ is complete path through which charge can flow
Answer:
An electric circuit
Explanation:
Please help on this one? PLEASE.
Answer:
option d: microwave industrial drying equipment
Explanation:
During the day, when the Sun is shining, the ground gets warm mainly as a result of...
heat from Earth's core being conducted to Earth's surface.
convection currents in the atmosphere heating the ground.
radiated heat from the Sun being absorbed by the ground.
the emission of greenhouse gases from factories and vehicles.
Answer:
radiated heat from the Sun being absorbed by the ground
Answer: radiated heat fron the Sun being absorbed by the ground.
Explanation: During the day the Sun is "shining", this means that the sun is "emanating" electromagnetic waves (some in form of visible light, this is why in the day we can see a lot of light) that reach us in the Earth. Those electromagnetic waves carry with a lot of energy, and when they impact the ground, they transmit that energy in form of heat. This "transmission" of temperature is called "radiation", so the correct option is the third one; radiated heat from the Sun is absorbed by the ground.
Explain why the baking instructions on a box of cake mix are different for high and low elevations. Would you expect to have a longer or shorter cooking time at a high elevation?
Answer:
All this is due to atmospheric pressure (which decreases with height) and affects the boiling point of water. That is why for recipes that carry some liquid (cake or bread, for example) it is necessary to modify both the ingredients and the baking time.
To better understand this, let's begin by explaining that the boiling point of water at an atmospheric pressure at sea level is [tex]100\°C[/tex] and as the height increases and the atmospheric pressure decreases, this boiling point will diminish, as well.
This means the water will not boil at the same temperature at different pressures, because at lower pressure the boiling temperature will be lower.
In other words, as at this point the water boils at a lower temperature, it heats less, so that the food takes longer to cook (because it is necessary to increase the cooking time in order to have a well done food).
This is because as the height increases, the atmosphere becomes drier, the air has less oxygen and moisture evaporates quickly, therefore, it is sometimes necessary to add more water to compensate this evaporation during cooking.
Hence, at higher altitudes, the cooking time will be longer.
Susie goes out for a jog. She jogs South for 150.0 m before stopping to tie her shoe. After her shoe is tied she turns East and runs another 75.0 m. What distance does she go?
Answer: 225.0 m
Explanation:
Because you asked for distance, and not displacement, you simply need to add 150m + 75m, which is 225 m.
Which color of visible light has the longest wavelength?
Answer: the answer is red which its wavelength is slighty longer than blues
Red light has the longest wavelength among visible colors.
Explanation:Red light has the longest wavelength among the colors of visible light. The main colors of visible light, from longest to shortest wavelength, can be remembered using the mnemonic ROY G BIV- Red, Orange, Yellow, Green, Blue, Indigo, and Violet. Violet, on the other hand, has the shortest wavelength among the colors of visible light.
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When light strikes a red object, what happens to the light waves of all colors except red?
A. They are polarized
B. They are absorbed
C.They are diffracted
D.They are reflected
When light strikes a red object, the light waves of all colors except red are absorbed into the object, and never heard from again. (B)
The only thing left to bounce off of the object into anyone's eye is the waves of red.
When light strikes a red object, the light waves of all colors except red are absorbed. The correct option is B.
What is light?The light is the ray form of energy which falls on the object to enlighten them and make us able to see that object.
if an object is red, it will absorb almost all colors except red. The light falling on red object, couldn't absorb the red color. It is the only color which is completely reflected back.
Thus, when light strikes a red object, the light waves of all colors except red are absorbed. The correct option is B.
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There is a repulsive force between two charged objects when
When two electrically charged bodies come closer, appears a force that attracts or repels them, depending on the sign of the charges of this two bodies.
This is stated by Coulomb's Law:
"The electrostatic force [tex]F_{E}[/tex] between two point charges [tex]q_{1}[/tex] and [tex]q_{2}[/tex] is proportional to the product of the charges and inversely proportional to the square of the distance [tex]d[/tex] that separates them, and has the direction of the line that joins them"
Mathematically this law is written as:
[tex]F_{E}= K\frac{q_{1}.q_{2}}{d^{2}}[/tex]
Where [tex]K[/tex] is a proportionality constant.
Now, if [tex]q_{1}[/tex] and [tex]q_{2}[/tex] have the same sign charge (both positive or both negative), a repulsive force will act on these charges.
What is the value of work when a piston of volume 0.2 L expands against an external pressure of 200 kPa to a volume of 3.4 L?640 J3.40 kJ-640 J-3.40 kJ
Answer:
640 J
Explanation:
The work done by the piston when expanding is given by
[tex]W=p\Delta V[/tex]
where we have
[tex]p=200 kPa = 2.0\cdot 10^5 Pa[/tex] is the pressure
[tex]\Delta V[/tex] is the change in volume of the gas inside the piston;
since we have
[tex]V_i = 0.2 L[/tex] is the initial volume
[tex]V_f = 3.4 L[/tex] is the final volume
The change in volume is
[tex]\Delta V=3.4 L-0.2 L=3.2 L=3.2\cdot 10^{-3} m^3[/tex]
and so the work done is
[tex]W=(2.00\cdot 10^5 Pa)(3.2 \cdot 10^{-3}m^3)=640 J[/tex]
Billy left some rocks outside in the Sun. After many hours, they got hot. When he went inside for the night, he left them outside. What will happen to the rocks as they stay out all night?
Answer:
they get cool
Explanation:
Billy left some rocks inside for the night. The rocks will be cooled as they stay out all night.
What is Hot and Cold?When the temperature of any object increases, it becomes hot. The same way, if the temperature decreases, it gets cold.
The sunlight carries the heat in the form of light rays. As they fall on the rock when kept outside in the Sun, they become hot. After the sunset, the surrounding temperature get down to the lowest. The temperature of the rock will also be decreased.
Thus, the rocks as they stay out all night, will get cold.
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A 100-g toy car is propelled by a compressed spring that starts it moving. the car follows a curved track. what is the final speed of the toy car if its initial speed is 2.00 m/s and it coasts up the frictionless slope, gaining 0.180 m in altitude.
Answer:
0.687 m/s
Explanation:
Initial energy = final energy
1/2 mu² = mgh + 1/2 mv²
1/2 u² = gh + 1/2 v²
Given u = 2.00 m/s, g = 9.8 m/s², and h = 0.180 m:
1/2 (2.00 m/s)² = (9.8 m/s²) (0.180 m) + 1/2 v²
v = 0.687 m/s
The final speed of the toy car is about 0.687 m/s
[tex]\texttt{ }[/tex]
Further explanationLet's recall Kinetic Energy Formula as follows:
[tex]\large {\boxed{Ek = \frac{1}{2}mv^2} }[/tex]
Ek = Kinetic Energy ( Joule )
m = mass of the object ( kg )
v = speed of the object ( m/s )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
mass of toy car = m = 100 g
initial speed of toy car = u = 2.00 m/s
initial height position of toy car = h₁ = 0 m
final height position of toy car = h₂ = 0.180 m
Asked:
final speed of toy car = v = ?
Solution:
We will use Conservation of Energy to solve this problem:
[tex]Ep_1 + Ek_1 = Ep_2 + Ek_2[/tex]
[tex]mgh_1 + \frac{1}{2} m u^2 = mgh_2 + \frac{1}{2} m v^2[/tex]
[tex]0 + \frac{1}{2}mu^2 = mgh_2 + \frac{1}{2} m v^2[/tex]
[tex]\frac{1}{2}u^2 = gh_2 + \frac{1}{2}v^2[/tex]
[tex]u^2 = 2gh_2 + v^2[/tex]
[tex]v^2 = u^2 - 2gh_2[/tex]
[tex]v = \sqrt {u^2 - 2gh_2}[/tex]
[tex]v = \sqrt {2.00^2 - 2(9.8)(0.180)}[/tex]
[tex]v \approx 0.687 \texttt{ m/s}[/tex]
[tex]\texttt{ }[/tex]
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Answer detailsGrade: High School
Subject: Physics
Chapter: Energy
the amplitude of a sound wave is related to which property?
A.Speed
B.Volume
C.Pitch
D.Wavelength
Answer:
B
Explanation:
The higher the volume, the higher the amplitude of the sound wave. This is because the sound wave is being converted to electricity. The higher the vibrations the higher the current it is induced. Changes in the amplitude of a particular wave do not change its wavelength or frequency. This is observable in an oscilloscope.
Answer:
Volume
Explanation:
A 120 kg Santa Claus slides down a 9 m chimney. He drops from his sleigh 2 m above the top of the chimney. It’s a tight fit, but he slides the whole way. He just comes to rest as he reaches the hearth. What is the force of friction on Santa from the chimney?A) 750 NB) 2000 NC) 2500 ND) 3200 NE) 1500 N
Answer:
E) 1500 N
Explanation:
The total height from which Santa has fallen down is
h = 9 m + 2 m = 11 m
So its gravitational potential energy at the beginning was
[tex]U=mgh=(120 kg)(9.81 m/s^2)(11 m)=12,949 J[/tex]
While sliding down, Santa has lost all its gravitational potential energy: this energy has been converted into thermal energy due to the presence of the friction. So, the work done by friction is exactly equal to the initial potential energy of Santa:
[tex]W=12,949 J[/tex]
The work done by friction is
[tex]W=Fd[/tex]
where
F is the force of friction
d = 9 m is the length of the chimney (the distance through which the frictional force acts)
Solving the equation for F, we find
[tex]F=\frac{W}{d}=\frac{12,949 J}{9 m}=1439 N[/tex]
So the closest option is
E) 1500 N
A stone is thrown straight up from the roof of an 80 ft building. the height, in feet, of the stone at any time t, in seconds, measured from the ground is given by ℎ(????) = −16???? 2 + 64???? + 80. what is the maximum height the stone reaches?
Answer:
144 ft
Explanation:
h(t) = -16t² + 64t + 80
The maximum height is at the vertex. We can find the vertex of a parabola using -b / (2a):
t = -64 / (2×-16)
t = 2
The vertex is at 2 seconds. The height of the stone at this time is:
h(2) = -16(2)² + 64(2) + 80
h(2) = 144
The maximum height is 144 feet.
Final answer:
To find the maximum height that the stone reaches, calculate the vertex of the quadratic equation, which leads to a time of 2 seconds. Substituting this back into the height function h(t), we find that the stone reaches its maximum height of 144 feet above the ground.
Explanation:
To determine the maximum height the stone reaches in the given quadratic function h(t) = -16t2 + 64t + 80, we need to find the vertex of the parabola. The vertex form of a parabola is y = a(x - h)2 + k, where (h, k) is the vertex of the parabola. Since our parabola opens downward (a = -16), the vertex will represent the maximum point.
The vertex of the parabola h(t) can be found by using the formula h = -b/2a, where a and b are coefficients from the quadratic equation in the form ax2 + bx + c. In this case, a = -16 and b = 64. Plugging these values into the vertex formula, we get h = -64/(2*-16), which simplifies to h = 2 seconds. This is the time at which the maximum height is reached.
Now, we can find the maximum height by substituting t = 2 back into the original equation to get h(2) = -16(2)2 + 64(2) + 80, which equals 144 feet. Therefore, the maximum height reached by the stone is 144 feet.
Once your rocket reaches space, the captain adjusts the speed. your captain goes from 24,000 km/hr to 17,000 km/hr over 90 seconds. what is your acceleration?
Answer:
-21.6 m/s^2
Explanation:
First of all, we need to convert the initial and final velocities into m/s:
[tex]u = 24,000 km/h = 6666.7 m/s[/tex] is the initial velocity
[tex]v=17,000 km/h =4722.2 m/s[/tex] is the final velocity
The acceleration is given by
[tex]a=\frac{v-u}{t}[/tex]
where
t = 90 s is the time elapsed
Substituting the numbers, we find
[tex]a=\frac{4722.2 m/s-6666.7 m/s}{90 s}=-21.6 m/s^2[/tex]
and the negative sign means the rocket is decelerating.
Given the initial and final velocity, the negative acceleration ( re-tardation ) of the rocket in space is -21.6m/s².
What is Motion?Motion is simply the change in position of an object over time.
From the First Equation of Motion;
v = u + at
Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.
Given that;
Initial velocity u = 24,000 km/hr = 6666.67m/sFinal velocity v = 17,000 km/hr = 4722.22m/sElapsed time t = 90sAcceleration a = ?v = u + at
at = v - u
a = ( v - u )/t
a = ( 4722.22m/s - 6666.67m/s ) / 90s
a = ( -1944.45m/s ) / 90s
a = -21.6m/s²
Given the initial and final velocity, the negative acceleration ( re-tardation ) of the rocket in space is -21.6m/s².
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Who is the founder of operant conditioning?
Operant conditioning, sometimes called instrumental learning, was first extensively studied by Edward L. Thorndike, who observed the behavior of cats trying to escape from home-made puzzle boxes.
Hope this helps!
What aviation first is paul maccready credited with
Answer:
Paul B. MacCready, 81; inventor of human-powered aircraft, other innovations. Paul B. MacCready, the Caltech-trained scientist and inventor who created the Gossamer Condor -- the first successful human-powered airplane -- as well as other innovative aircraft, has died. He was 81.
Explanation:
Paul MacCready is credited with creating the first human-powered aircraft, the Gossamer Condor, which was able to follow a controlled, pre-determined course.
Explanation:Paul MacCready is a renowned figure in the world of aviation. He is mainly credited with creating the first human-powered aircraft to fly a pre-determined course. This aircraft is recognized as the Gossamer Condor, a revolutionary aircraft design that not only was powered by a human but also had the ability to be controlled and maneuver in flight. MacCready's innovative work in aviation technology has greatly contributed to how we understand and approach the concept of flight in the modern day.
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