Answer:
A. velocity has a direction .. .
with magnitude too but speed has only magnitude
Answer:
A
Explanation:
Speed doesnt have a direction, it is a type of measurement while velocity is the rate and direction that something is going
Which force was the first to be discovered?
Group of answer choices
due 11:59 help pweysss
Explain how Galileo proved that his model was correct and that Ptolemy’s was not correct.
Answer:
Written below.
Explanation:
Despite his many attempts, Galileo could not prove that the earth went around the sun. However, he was able to prove that the Ptolemaic model was incorrect, after he made telescopic observations of Venus. He discovered that Venus went through a full set of phases, like our moon. This could only happen if Venus went around the sun. In the Ptolemaic model, Venus does not go around the sun, and so would not go through all the phases. The diagram below shows how Venus would only go through crescent phases in the Ptolemaic model. (Recall that the phase of Venus will depend on the relative positions of the earth, Venus and the sun.)
In order to see a "full" Venus, the sun must be between the earth and Venus. A "gibbous" Venus is when the sun is sort of between the earth and Venus. When Venus is at its greatest elongation from the sun, then we would see it as a "half." When Venus was even closer to the earth, we would see it as a crescent. All these conditions happen only when Venus goes around the sun, as in the models by Copernicus and Brahe. In the Ptolemaic model, Venus is always between the earth and the sun, so would only show crescents. Even greatest elongation would not give a half Venus, because the triangle made between the sun, earth and Venus would not be a right triangle.
Galileo's studies of motion also led him to discover the basic idea of inertia. He finally figured out that if an object has a velocity, it will maintain that velocity without the need for any other forces. In fact, it takes a force in order to change a velocity. The reason why objects slow down unless they are pushed is that there is a frictional force that acts whenever two objects rub or slide across each other, and this frictional force is what causes things to slow down. As scientists finally began to accept Galileo's ideas of motion, then the big scientific reasons for rejecting a moving earth disappeared, leaving only the religious.
By this time Kepler had discovered that the planets actually orbitted the sun in an ellipse, but I am not sure why Galileo did not mention Kepler. It should also be noted that Brahe had proposed his own hybrid model of the solar system, with the sun orbiting the earth, and all the other planets orbiting the sun. Brahe's model did correctly explain the phases of Venus, and had the earth at rest in the center. For a while in the seventeenth century, the religious astronomers dumped Ptolemy, but clung to Brahe's as a possible model that kept the earth at rest. Science as a whole, however, had moved on and accepted the heliocentric model. Most scientists accepted the heliocentric theory not because there was proof that the earth moved, but because it was the "prettiest" model that explained the observations.
Galileo invented telescope and he observed the movement of planets around stars. From constant observations, he found the earth centric solar system model is wrong and all planet are revolving around sun making it heliocentric.
What were Galileo's contribution to heliocentric models?With the aid of his telescope, Galileo demonstrated that Venus experienced a full cycle of phases, just like the Moon. The first concrete observational evidence that was consistent with the Copernican system but not the Ptolemaic system was given by this observation, making it one of the most significant in human history.
The empirical finding that Venus is always close to the Sun in our heavens is key. As the enlarged image shows, Venus should therefore always be in crescent phase in the Ptolemaic system when observed from Earth because, as it revolves around its epicycle, it cannot ever be too far from the direction of the sun.
The Copernican system was primarily appealing because it simplified how the data were described, but this was the clearest proof yet that the Ptolemaic cosmos was not simply more flawed than the Copernican one.
Find more on heliocentric planetary model:
https://brainly.com/question/28488859
#SPJ3
Suppose a 4,000-kg elephant is hoisted 20 m above Earth’s surface. Use a calculator and follow the steps below to find the elephant’s gravitational potential energy.
Step 1:
Calculate the elephant’s weight
(w = mg)
Step 2:
What is the GPE of the elephant?
(GPE = w * h)
Answer:
8,000m
Explanation:
W=4,000kg
H=20m
PE= ?
---------------------
GPE=W x H
-----------------------
4,000kg x 20m = 8,000kg
https://phet.colorado.edu/sims/html/balloons-and-static-electricity/latest/balloons-and-static-electricity_en.html
I will give anyone who does this lab for me 70 points plus brainliest. please message me through brainly for the screenshots since it won't let me attach screenshots. let me know if the messages arent working. Thanks!
Answer:
there is not pic
Explanation:
I'm confusion, can I please get help???
Answer:
Anything below 7.0 is acidic, so the range would be 0 to 7.
Neutral is simply 7, in the middle of the scale.
Lastly, anything above 7.0 is basic or alkaline, so that would be 7 to 14.
Good luck, I hope this helps
PLEASE HELP!! Recreation that uses the large muscles of the body is sometimes referred to as _____.
A. extrinsic recreation
B. physical recreation
C. motor skill recreation
D. sedentary recreation
NO LINKS!
Due to the connection between electric and magnetic phenomena, the magnetic field generated by an MRI machine can be used to excite the positive charges in hydrogen atoms. These hydrogen atoms emit radio waves that can be used to form an image of their locations. The main source of hydrogen atoms in the human body is water. Which of the following are limitations this method might place on the images that can be generated?
Select all that apply.
A
Detecting hydrogen atoms allows for certain parts of the body to be imaged better than others.
B
Areas without large amounts of water are harder to map.
C
Hydrogen is not present in the human body.
Please tell me if if these statements are true or false
1. Light cause the same change to all materials.
2. All light is the same, whether it comes from the sun, a light bulb, or anywhere else.
3.All light can be seen.
4.Light can travel through materials that you cannot see through, like wood or aluminum foil.
Please explain why. (if its too much to explain don't worry about it, i'll try to do it myself)
Answer:
Im not sure if im right but this is what i got( i have no clue how to explain im sorry)
1. False
2. False
3. True
4. False
How does electricity turn into light in a common lightbulb?
A. Electricity strikes the metal particles of the filament in a lightbulb. Some of the metal particles become gases and turn into light.
B. Electricity heats up the filament in the bulb to a very high temperature. At that temperature, the metal becomes bright and gives off light.
C. Electricity cools down the filament in the bulb to a very low temperature. At that temperature, the metal becomes bright and gives off light.
D. Electricity strikes the metal particles of the filament in a lightbulb. Some of the metal particles are ripped off from the metal and turn into light.
Answer:
i think its B
Explanation:
im pretty sure.
When MRI machines are capturing images of a person’s body, they produce extremely powerful magnetic fields. What might be some issues that an MRI technician would need to work around due to these magnetic fields?
Please help!
Answer:
Make it less dangerous for humans. The radiation is bad for dem!
Explanation:
I tried!
(science)
Which of the following below describes what happens to water particles near the surface when a wave passes by?
(1 Point)
The water particles move towards shore.
The water particles move in circles, up & down.
The water particles move randomly.
The water particles move little, if at all.
Answer:
B.
Explanation:
PLEASE HELP!! DUE SOON!!!
Describe examples of the normal range of motion for two different joints (choose from knee, elbow, shoulder, and hip).
Answer:
See attached file :)
Hope this helps!
All the love, Ya boi Fraser :)
Answer:
Each joint has different ranges of motion for each type of movement it can ... and bones move the joint into a straightened position, like straightening the elbow
Force Fields test
Based On Newton’s Law of universal gravitation, Complete the following table
Which tissue system in plants is most similar to the Integumentary system in animals? explain your reasoning (DON'T USE G.O.O.G.L.E)
Answer:
its epidermis...
In plants, the epidermis is the tissue most like the integumentary system in animals. The epidermis covers the body of the plant, including stems...
Explanation:
have a good day!
(￣▽￣)ノ
Select the correct locations on the image.
In which four locations do hurricanes occur?
this isn't really a question its more of an answer for u guys who need it.
btw I doubt its Indian ocean if other people are swearing that its not so the fourth I'm sure is north pacific on the far top left.
Answer:
Hurricanes hit almost everywhere but I will say the gulf of for your fourth answer.
Explanation:
you might be right on the north pacific but here is another option.
The following diagram shows a stage of a cell during mitosis.
Which of the following happens to the cell during the stage shown in the diagram?
The chromosomes are replicated.
The chromosomes start to condense.
The centromere of each chromosome splits.
The centrosomes line up in the middle of the cell.
How are electromagnetic waves used in the military?
please help
types of stimuli the sensory organs receive.
Answer: Photoreceptor cell, Chemoreceptor, Thermoreceptor, Mechanoreceptor
Hope this helps(:
Explanation:
Complete the statement below with the correct term.
It is a best practice to identify at least ----------
alternative solutions that meet the requirements for solving a problem.
!! PLEASE HELP !!
Describe the two characteristics of the general surface wind circulation pattern associated with this low-pressure system
Which location on the map, W, X, Y, or Z, most likely has the greatest wind speed? Describe one piece of evidence on the map indicating that this location has the greatest wind speed.
Answer: I would Say X.
Explanation: I say this because the numbers are higher near X. I'm not sure because the map does not say much. Hope this helped. Have A Good Day!!!
The wind speed is highest at point X, due to high pressure area and counterclockwise flow.
The given problem is based on the wind circulation system. In climatology, the wind circulation system is referred to as the movement of air relative to the surface of Earth. The characteristics of the general wind circulation pattern associated with low-pressure system is as follows:
The Wind flow will be towards the low pressure region, and the air rises in the atmosphere.As air rises, the moisture gets into condensation and clouds are formed along with the precipitation.The evidence for determining the greatest wind speed is that, "Wind moves counterclockwise around low-pressure area and clockwise around the high-pressure area". Now, the pressure and speed for the wind is,
[tex]P=\dfrac{1}{2} \rho v^{2}[/tex]
here, P is the pressure and v is the speed of wind. So, higher the pressure, higher will be speed.
As per the given map, point X represents the area of counterclockwise movement of wind, so probably it should have high pressure, hence speed is higher at point X.
Thus, we can conclude that the wind speed is highest at point X, due to high pressure area and counterclockwise flow.
Learn more about the wind speed here:
https://brainly.com/question/20151987
Select all TRUE statements about nuclear power. *
Nuclear power does not produce carbon dioxide.
Nuclear power is reliable, and can provide lots of electricity on demand.
Nuclear power is clean, with no environmental impacts.
Nuclear power is cheap to build.
Answer:
Nuclear power does not produce carbon dioxide. – True
Nuclear power is reliable, and can provide lots of electricity on demand– True
Nuclear power is clean, with no environmental impacts. – True
Nuclear power is cheap to build. – False
Explanation:
From my research on nuclear power, these are all true but one.
Hope this helps :)
PLS HURRY ITS TIMED Sayid recorded the temperatures of four substances in a chart what conclusion best supported by the data?
A. The particles in substance W have a greater kinetic energy than the particles in substance Z.
B. The particles in substance X have a greater average Kinetic energy than the particles in substance Z.
C. The particles in substance W have a lower average kinetic energy than the particles in substance X.
D. the particles in substance Z have a lower average kinetic energy than the particles in substance Y.
Answer:
First, it is important to understand that average kinetic energy is directly proportional to temperature. This means that the substance at the largest temperature will also have the largest average kinetic energy. Therefore, from largest to least, the average kinetic energies would be: Z, X, W, then Y. When you look at the answer choices, the only choice that makes sense is that the particles in substance W have a lower average kinetic energy than the particles in substance X because substance W is at a lower temperature than substance X.
Explanation:
_________________ are scientists that study the composition of Earth, including rock layers at the surface.
Answer:
stratigraphy
Explanation:
I think this is the scientist
Which form of radiation has a frequency of 125 x 10¹⁵?
why are mud shoes better then high heels
Answer:
you can do anyhthing in mud shoes that you cant in high heels duh
Explanation:
Answer:
Because you can dirty them or whatever and it even protect you from bacteria
Explanation:
lets say you got high heels right now on a rainy day you want to take a short cut to a store across you street and you need to walk over mud your heels will be stuck in the mud or even brake
A body that orbits a planet is called a :
Answer:
Satellite
Explanation:
I just consulted my science notes to make sure I was correct on this....
Hope this helps. Have a nice day you amazing bean child.
Explain:The Sun appears to move across the sky each day, but we know that it only looks that way because the Earth is moving (rotating). Write out a way to demonstrate or explain this idea to a younger student. (Hint: think about what it’s like to look out the window of a moving car or to spin in a circle.)
Answer:
Earth is always moving. Each day, the Earth makes one complete rotation on its axis. ... As Earth rotates, it seems like the sun is moving across the sky, but it's really the Earth that is spinning. It takes 24 hours to complete one rotation, which is why there are 24 hours in one day.
Explanation:
Explanation:
write 20 physical Quantities withS.I unit and formula
can someone plz help me :'(
An effective team consists of people who tend to think alike so that they can quickly progress to their target.
False
True
where does pressure come from?
Answer:
It is made up of molecules which are pulled down to Earth by gravity. That pull makes molecules bump into each other, exerting pressure. Our bodies are specially adapted to living under 1 kilogram per square centimeter (14.7 pounds per square inch) of pressure pushing down on us at sea level!
Explanation:
Answer:
It is made up of molecules which are pulled down to Earth by gravity. That pull makes molecules bump into each other, exerting pressure. Our bodies are specially adapted to living under 1 kilogram per square centimeter (14.7 pounds per square inch) of pressure pushing down on us at sea level!Oct 7, 2014
Explanation:
