A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the lowest?(1 point)
A)when the ball is at its highest point
B) at a point when the ball is still rising
C)when the ball leaves the person’s hand
D) at a point before the ball hits the ground
When a person throws a ball up into the air, and the ball falls back toward Earth, the kinetic energy will be the lowest when the ball is at its highest point (option A).
Kinetic energy is given by:
[tex] K = \frac{1}{2}mv^{2} [/tex]
Where:
m: is the mass
v: is the velocity
So, the kinetic energy is proportional to the velocity and the mass of the object.
When the person throws the ball up into the air, the ball will move upward to a maximum height and then will move down until it hits the ground.
In the upward motion, the ball's velocity will decrease until it reaches the maximum height, where it will be zero. In the downward motion, the magnitude of the ball's velocity will increase because of the acceleration due to gravity until it reaches the ground.
From the statements:
A) When the ball is at its highest point, the velocity will be zero, so the kinetic energy will be zero.
B) When the ball rises, the velocity decreases, so the kinetic energy will also decrease.
C) When the ball leaves the person's hand, it has an initial velocity that is the highest, so the kinetic energy has at this point, the maximum value.
D) Before the ball hits the ground, the ball's velocity has the same value (in magnitude) as the initial value (when the ball leaves the person's hand), so the kinetic energy will be the highest at this point (like statement C).
Therefore, the kinetic energy will be the lowest when the ball is at its highest point (option A).
Learn more here:
https://brainly.com/question/13275688?referrer=searchResultshttps://brainly.com/question/999862?referrer=searchResultsI hope it helps you!
What do I do when I have A test on Measuring and Density
How do I measure the length?
electrons are one of the ________, or pieces, that make up an atom
Answer:
Components
Explanation:
Wish it helps
1) you are building a model plane that needs small block inside to balance its weight. you find that the block material you are using has half the density you thought it did. you still need the same weight for the blocks in the plane, and they must have the same width and length. how you can keep the weight the same?
2) your teachers set two cups on a bench at the front of the class. one contains water dyed blue and the other clear water. the teacher says one cup is very salty water and the other one is freshwater. how would you figure out which one is salty and which one is fresh.
3) In much of the world, SI units are used everyday life and not just in science. why would it make sense for people in the united states to use SI in everyday life, too? explain using math terms such as calculate and convert.
HELP ME PLEASEE
Answer:
then it will move 1 too 2
right maybe
Explanation:
Which of the following is the best way to explain how baking a cake or frying an egg is a chemical change?
A Both are changing size and shape.
B Heat is changing the texture of both substances.
C Heat is being added to both, causing a phase change.
D The end products of both cannot be reversed to their original forms.
Answer:
D or C
Explanation:
A chemical change means that something is permanently changed and there's no way to get it back. The proteins in the egg white/yolk are subjected to high heat, they change into varying proteins.
Frying an egg is a chemical reaction. It is an example of an endothermic reaction or one that takes in heat to make the reaction occur.
When baking your cake it is a chemical change because you can't get your ingredients back. We know that it is a chemical change because heat energy is involved. When you are mixing your cake batter, it includes such ingredients as water, oil, and eggs.
Answer: I think both are great examples of chemical changes
Explanation: because they both take and give off heat and they cant return back to their original forms
Suppose that 273 g of the substances listed displaces 26 mL of water. What is the substance?
Substances:
Zinc=7.13
Silver=10.50
Lead=11.35
Answer: Pretty sure its silver
Explanation:
In which of the following examples would you see a chemical change occur?
A. Candle wax melting
B. Lighting a match
C. Salt dissolving in water
D. Water freezing
Answer: i’m pretty sure it’s B
Explanation:
How many hydrogen atoms in 5 H2O?
[ Select ]
A:3
B:10
C:7
D:5
How many oxygen atoms in 5 H2O?
Select
A:3
B:10
C:7
D:5
How many different types of atoms in 5 H2O?
[ Select ]
A:10
B:3
C:7
D:5
How many total atoms in 5 H2O?
[ Select ]
A:10
B:3
C:5
D:2
5 H2O is a
A: element
B: compound
Answer:
D
B
B not sure sorry
C
Compound
can u help me and ty :))
Answer:
3.166
Explanation:
energy=30J
input =95J
efficiency=?
efficiency= input/energy
= 95/30
=3.166
Answer:
3.166
Explanation:
= 95/30
=3.166
Hope this helped!!
What is the definition of the particle?
A particle is a small piece of anything. If you mean a subatomic particle, that's a body that you can't see because it is so incredibly small, though it does have a miniscule mass and internal structure. These particles are even smaller than atoms. You can also say a crumb or speck of something is a particle.
I am an element that has no luster, brittle, and is a poor conductor of electricity. What element can I be?
Answer: Oxygen
Explanation:
Oxygen is not a good conductor, it is brittle, and has no luster.
If you weighed the atoms that appear on the reactant side of the equation, would they have the same mass as the atoms that appear on the product side? for N2 + H2 -> NH3
Answer:
No
Explanation:
If you added the reactants on the reactant side because there is one atom for nitrogen on the product side while there is two atoms on the product side. There are more hydrogen products on the reactant side as well.
An image of a cue ball striking the surface of a pool table is shown. All of the following describe the acceleration of the cue ball EXCEPT-
A. the ball changed direction when it hit the side of the table.
B. the ball traveled at 30 cm/s while it was moving.
C. the ball was at rest until it was struck by the pool cue.
D. the ball eventually came to a stop due to friction.
The acceleration of the cue ball is not described by the ball traveling at 30 cm/s while it was moving. Therefore, option (B) is correct.
What is acceleration?Acceleration can be described as the change of velocity of an object with respect to time. The acceleration is a vector quantity as it possesses both magnitude and direction. Acceleration is calculated as the second derivative of position w.r.t. time as well as the first derivative of velocity of an object w.r.t. time.
The force is the product of the mass and acceleration of an object according to Newton's second law of motion,
F = ma
And, a = F/m
Therefore, the acceleration of a moving object is inversely proportional to its mass.
As the cue ball hit the pool table its direction changed so it defines acceleration as acceleration is a vector quantity. The cue ball eventually stops due to friction.
Learn more about acceleration, here:
https://brainly.com/question/12550364
#SPJ2
10 points Explain the Lunar Eclipse in 4-5 (PLEASE DON'T LOOK IT UP THAT'S PLAGIARIZING
Answer:
use code sypherpk
Explanation:
Which lists only metalloids?
arsenic (As), sulfur (S), and polonium
(Po) antimony (Sb), tellurium (Te), and gallium(Ga)
boron (B), germanium (Ge), and tellurium (Te)
polonium (Po), aluminum (Al), and silicon (Si)
Answer:
boron (B) germanium (Ge) and Tellurium (Te)
Explanation:
got it right on edge : )
If it rained, what would be the deepest layer the water would go through?
Answer:
soil
Explanation:
You decided you want to make spaghetti for supper. You first light the gas stove because you need to cook the meat. When the meat is cooked, you add sauce to it. Then you put a pot of water on the stove to get it boiling. The next step is putting the spaghetti noodles in to boil. Finally, you drain the spaghetti noodles and add the sauce. Which of the following describes the chemical changes happening?
A Cooking the meat and boiling the water are both chemical changes.
B Lighting the stove and cooking the meat are both chemical changes.
C Light the stove with a match and boiling the noodles are both chemical changes.
D Mixing the pasta sauce with the meat and boiling the noodles are both chemical changes.
Answer:
C
Explanation:
Brainliest
help it is due tomorrow
Answer:
2 H atoms
1 Mg
5 total atoms
Explanation:
Describe one example of an energy transformation in this diagram and explain why it is a transformation. Repeat this description and explanation for an energy transfer.
Answer:
energy is just we all know that energy is the ability too do work
as given in example below
Explanation:
we move
we walk
draw
we push
we pull
these all thiings called Energyy
Does stirring a liquid make it cool down faster?
Answer:
Stirring will help cool a hot drink because it speeds up the process of convection by bringing the hottest liquid at the bottom to the top
Explanation:
Answer: No not really, all your doing is moving it around
Explanation:
I tested it
Eriq, a chemist, is running tests with four unknown elements. He has found that they all bond the same way, so he knows that they are in the same group on the periodic table of elements. The table shows other properties that Eriq observed.
A 4-column table with 4 rows titled properties of four unknown elements. The first column titled element number has entries 1, 2, 3, 4. The second column titled melting point has entries 266 K, 172 K, 387 K, 53 K. The third column titled boiling point has entries 332 K, 239 K, 457 K, 85 K. The fourth column titled phase at room temperature has entries liquid, gas, solid, gas.
These four elements are most likely in group
15.
16.
17.
18.
Answer:17
Explanation:
i agree
Medical diagnosis and what are common uses of radioactive elements in health care?
Answer:
nuclear medicine
Explanation:
2H2+O2→2H2O
There are four atoms of hydrogen (H) before the reaction. How many atoms of hydrogen are present after the reaction?
4
8
5
2
Answer:
2
Explanation:
The number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4
Law of conservation of massFrom the question,
We are to determine the number of atoms of hydrogen present after the reaction.
From the law of conservation of mass which states that
"Matter can neither be created nor destroyed"
This means, the number of atoms are the same before and after the chemical reaction.
Since the number of hydrogen atoms before the reaction is four, then there would be four hydrogen atoms after the reaction.
Hence, the number of atoms of hydrogen that are present after the reaction is 4. The correct option is the first option - 4
Learn more on the Law of conservation of mass here: https://brainly.com/question/2030891
#SPJ2
Which element would react faster with oxygen because of the properties it possesses?
Berryllium, Potassium, Neon, Barium
Answer:
Berryllium
Explanation:
its the most reactive (mark brainliest plz)
Berryllium would react faster with oxygen.
information regarding oxygen:
Beryllium refer to the silvery-white metal. It is in soft and contains the less density. Beryllium applied in alloys along with copper or nickel.Also, it should be reached quicker with the oxygen.Find out more information about the oxygen here:
https://brainly.com/question/1506082?referrer=searchResults
please answer this question quickly
Answer:
The right would be rusting. not sure what the left would be
Explanation:
I need an answer to how science shape philosophy!
Answer:
Philosophy may be called the "science of sciences" probably in the sense that it is, in effect, the self-awareness of the sciences and the source from which all the sciences draw their world-view and methodological principles, which in the course of centuries have been honed down into concise forms.
Explanation:
In recording data, it is important to use the proper unit. Which unit is used to measure how warm or cool the air is?
liters (L)
grams (g)
millimeters (mm)
degrees Celsius (°C)
Answer:
Degrees Celsius (°C)
Explanation:
Liters is for liquid, grams is for mass, and millimeters is for length
Answer:
Degrees Celsius
Explanation:
Liters (L) measure volume, grams (g) measure mass, and millimeters (mm) measure length. Degrees Celsius measures temperature, which is how warm or cool the air is.
Which of the following happens to a material when it goes through a chemical change?
A The substance changes size.
B The substance changes state.
C The substance changes shape.
B The substance changes into a new substance.
The following happens to a material when it goes through a chemical change is the substance changes into a new substance. Thus option D is correct.
What is chemical change?Chemical change is defined as a change of materials into another, new materials with different properties and one or more than one new substance are formed.
Physical change is defined as a type of change in which the form of matter is altered but one substance is not transformed to another substance i.e. new substance is not formed.
Thus, the following happens to a material when it goes through a chemical change is the substance changes into a new substance. Thus option D is correct.
To learn more about chemical change, refer to the link below:
https://brainly.com/question/2591189
#SPJ2
what is the product of a physical or a chemical change?
Answer:
I hope this helps
Explanation: Physical changes do not change a sbstances identity, it can consist of changes in color, size, etc.
Chemical changes on the completley changes the chemical makeup of a substance. Chemical changes can consist of combustion, corrosion, etc.
Buying fruit and vegetables needs to be done more often as these types of foods can quickly go rotten. What could you do to slow down the chemical change of fruits and vegetables rotting? Give a reason to support your answer.
Answer:
putting them in the fredge while in a plastic container
Explanation:
my reason is the cools down / kinda freeze the chemicals so it slows down
