Answer:
Mass = 86 kg acceleration due to gravity = 10m/sExplanation:
So force =m*a
Mass = 86 kg acceleration due to gravity = 10m/s
How does the temperature of water change when it is placed in a freezer and
then begins to freeze?
O A. It decreases first and then remains constant.
B. It decreases first and then increases.
O C. It increases first and then remains constant.
D. It increases first and then decreases.
The temperature of water changes as It decreases first and then remains constant . when it is placed in a freezer and then begins to freeze, therefore the correct answer is option A .
What is thermal energy ?It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy .
When water changes to ice, firstly the temperature of the water decreases due to the specific heat, and during the phase change process, the temperature of the water remains constant .
Water temperature fluctuates when it initially drops and then stays the same . The right response consequently options A when something is placed in a freezer and starts to freeze .
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A pot of water is heated on an electric stove top and begins to boil. Which
TWO transfers of thermal energy involved in this system are examples of
convection?
O A. From the pot to the water
O B. From the rising warmed water to cooler water at the top
O C. From the burner to the bottom of the pot
O D. In the surrounding air as air currents develop
Answer:
B. From the rising warmed water to cooler water at the top
A pot of water is heated on an electric stove top and begins to boil and then Convection currents are set up in the boiling water and in the surrounding air.
What is Convection?Convection is the transfer of thermal energy by the actual movement of the molecules of a substance. A convection current is set up when the molecules of a fluid is heated, rises and is replaced by cooler molecules from below.
The characteristics of convection,
Convection occurs in liquids and gases.
Convection transfers thermal energy.
Convection occurs until all of the fluid is at the same temperature.
The two transfers of energy in this system are;
From the rising warmed water to cooler water at the top.In the surrounding air as currents develop.Hence, Option D is the correct answer.
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A fly takes 0.04 s to flap its wing once; find its frequency.
The blue mass is currently 4 meters away from the red mass.
If we change each mass to 20kg, what will happen to the gravitational force each mass puts on the other?? YOU HAVE TO CHOOSE A ANSWER THROUGH A B C!
The force of gravity will increase as the masses increase.
The force of gravity will not change as the masses increase.
The force of gravity will decrease as the masses increase.
Answer:
its a!
Explanation:
•✧•
How much force is needed to get a 0.9kg block of wood to slide if the static coefficient of friction is 0.8
Which property is useful for describing a substance might depend on the state of matter the substance is in?
Someone help
Its a Friday night and i have no idea what this answer for my hmw is
Average speed is described as _____.
A) speed that does not change
B) speed that does not always move at the same rate
C) speed that decreases
D) none of these
If an astronaut is 66 kg, what is their weight in N on the moon?
The mass of the person would be 66 kg on both Earth and the Moon.
help with a length problem
Answer:
B. Millimeters
Explanation:
Milliliters is a unit for volume
Millimeters are length, so its suitable for this.
Kilometers is also a unit used for length but its too big for a shoe measurement.
Kilograms is a unit for weight.
Explain when do we have an acceleration.
Two waves are in phase if they are of the same ___________.
Answer:
frequency.
Explanation:
Two sound waves of the same frequency that are perfectly aligned have a phase difference of 0 and are said to be “in phase.” Two waves that are in phase add to produce a sound wave with an amplitude equal to the sum of the amplitudes of the two waves.
What is your hypothesis (or hypotheses) for this experiment?
This lab is for KE (Kinetic Energy).
Answer:
mr or ms please type ur question fully please
Explain what wave frequency is...
Explanation:
Wave frequency is the number of waves that pass a fixed point in a given amount of time. The SI unit for wave frequency is the hertz (Hz), where 1 hertz equals 1 wave passing a fixed point in 1 second. A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.
Wave frequency is the number of waves that pass a fixed point in a given amount of time.
HELP ME
which examines some industrial applications of magnets and electromagnets, list two examples of objects that you use every day that rely on magnets or electromagnets.
Answer:
Headphones use electromagnets, and Audio Speakers use very large magnets inside of them
Explanation:
This answer doesn't really need an explanation but you can just research why they use those kind of magnets in those objects if you want.
how is claming territory in space dangerous
Answer:
Moon mining and outer-space colonies remain a pie-in-the-sky dream for now. But a new paper argues that the settlement of other worlds
Explanation:
When methane is burned it interacts with oxygen to form carbon dioxide and water vapor. Which of the following is the word chemical equation for this reaction?
Group of answer choices
oxygen + carbon dioxide -> methane + water
methane + oxygen -> carbon dioxide + water.
methane + carbon dioxide -> water + oxygen.
dioxide + carbon -> methane oxygen + water.
Answer:methane + oxygen -> carbon dioxide + water.
Explanation: this is your answer was happy to help
Which two factors affect the amount of thermal energy an object has?
O A. The amount of space between the particles of the object
B. The average kinetic energy of the particles of the object
O C. The mass of the object
O D. The directions in which the particles of the object are moving
Answer:
B and C
Explanation:
just did the quiz
The factors that influence amount of thermal energy that is found in an object are:
B: The average kinetic energy of the particles of the object
C:The mass of the object
Thermal energy can be regarded as the kinetic energy which is energy that is involved in the random motions of the molecules of object.It can be referred to as heat energy and it's been measured in joules or calories,One of the factors that affect the amount of this energy in an object is average kinetic energy of the particles that are present in that object, if the amount of the kinetic energy is high, then the object will have high thermal energy This is because the particle are in motion and not fixed.
Therefore option B, C are right.
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Supposed to be in biology.
3. What are the basic needs of living things?
4. What happens if a new organism is added to an ecosystem or if the temperature was to change
suddenly?
5. True or False. Ecosystems are always very large and cover a large amount of land.
6. Wha i ecoone
7. A ecosystem that exists on land (outside bodies of water) are called __________________________ and
ecosystems that exist within a body of water are called __________________________
Answer: Is Below :).
Explanation:
1. What are the basic needs of life?
Food, Sleep, Shelter, Oxygen, Water.
2. What happens if a new organism is added to an ecosystem or if the temperature was to change suddenly?
A. First of all, we would have to know if the new animal is king of the wild or a victim for the king. If its king, we would start to see the population decrease of certain animals and increase of that specie. If its not king we would see an increase in the population of the kings of the wild and decrease in the new specie.
B. If the temperature changed all of a sudden we would see many species die out due to them not being able to adapt to that certain atmosphere.
3. True or False. Ecosystems are always very large and cover a large amount of land.
False, and ecosystem can be large like a jungle but, it can also be small as just a tree in that jungle.
4. What is an ecosystem?
A biological community of interacting organisms and their physical environment.
5. A ecosystem that exists on land (outside bodies of water) are called Terrestrial ecosystem and ecosystems that exist within a body of water are called aquatic ecosystem.
Hope you got the answers to your problems! Have a great day!
Don't forget to rate and say thanks if it helps!
Which of the following is an example of an unbalanced force?
(A) A ball on the grass
(B) A book sitting on a table
(C) A chair leaning on the wall
(D) A stroller being pushed
Answer:
d
Explanation:
because the motion is changing as it slows down mark brainliest to help me out :)
The example of an unbalanced force is a stroller being pushed. The correct option is D.
What is unbalanced force?An object is said to be acted upon by an unbalanced force only when an individual force is not balanced by a force of equal magnitude and direction.
Unbalanced forces are caused by a forward force or thrust and a frictional force opposing each other.
Friction is an opposing force to motion. It occurs whenever two surfaces rub against each other, such as when you rub your hands together or apply the brakes on a bike or car.
Forces that are balanced are those that are opposite in direction and equal in size.
Equilibrium is defined as the presence of balanced forces. There is no change in direction when forces are balanced.
As here pushing a stroller is not balancing the force as the force applied is more than the opposing one.
Thus, the correct option is D.
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The blue mass in the image is 10kg.
The red mass in the image is 10kg.
The blue mass is currently 4 meters away from the red mass.
If we change the distance to 6 meters apart, what will happen to the gravitational force each mass puts on the other ?? You have to choose a answer through A,B,C !
Answer A The force of gravity will not change as the masses move away from each other.
Answer B The force of gravity will increase as the masses move away from each other
Answer C The force of gravity will decrease as the masses move away from each other
Answer: C
Explanation:
I guessed lol . Am i right .
A student observes a chemical reaction.
Aluminum (Al) + Oxygen (O) yields Aluminum Oxide (Al2O3)
She writes an equation that correctly displays the law of conservation of mass.
Select the balanced equation below that she wrote about this chemical reaction.
Group of answer choices
4Al + 3O2 --> 2Al2O3
4Al + 2O2 --> 3Al2O3
2Al + 3O3 --> 2Al2O3
Al + O2 --> Al2O3
The student observes a chemical reaction by using Alumimium and Oygen gives, 4Al + 3O₂ ---- > 2Al₂O₃. Hence, option A is correct.
What are Chemical reactions?A chemical reaction is a process in which one or more substances are converted into different substances. The chemical reaction involves reactants and products.
A chemical reaction rearranges the constituent of atoms in reactions to produce different products. The reaction involves the change in the position of electrons and also involves the breaking of chemical bonds to produce products.
The substance involves in the reaction initially is called reactant. The reactions are chemically changed from the reactant to form products. The reactant is converted into products dependent on the reaction rate.
The reactions must be balanced to form a reactant and product. The number of atoms present in the reactants must be equal to the number of atoms present in the products.
From the given reaction,
4Al + 3O₂ ---- > 2Al₂O₃
Hence, the ideal solution is option A.
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Cumulonimbus clouds are associated with what type of weather?
1.Stormy
2. Fair
3. Windy
Cumulonimbus clouds are associated with stormy weather.
Help me please! i seriously dont understand this unit
Answer:
The answer to your question is c 11 because the number of neutrons plus protons equals the atomic mass.
Explanation:
To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons.
Based on the Law of Conservation of Matter, what number should be placed in the box to balance the chemical equation below?
Group of answer choices
No coefficient is needed.
2
4
3
Answer:
2
Explanation:
Step 1: RxN
4Al + 3O₂ → Al₂O₃
Step 2: Balance RxN
We have 4 Al's and 6 O₂'s on the reactant side.
We need the same number of Al's and O₂'s on the product side.
4Al + 3O₂ → 2Al₂O₃
Describe how the size of the starting force affects the distance moved by the car.
Answer:
There are two forces acting in opposition to the driving force, so the friction and the road and the air resistance. The air resistance is much greater than the friction with the road when a vehicle is in motion. When a vehicle is at rest, all of the forces acting on it are balanced.
How is wavelength related to a waves energy?
Answer:
The energy of a wave is directly proportional to its frequency, but inversely proportional to its wavelength. In other words, the greater the energy, the larger the frequency and the shorter (smaller) the wavelength.
Explanation:
i hope it will help u buddy✅
Answer:
The energy of a wave is directly proportional to its frequency, but inversely proportional to its wavelength. In other words, the greater the energy, the larger the frequency and the shorter (smaller) the wavelength.
Explanation:
._.
If a steel nail is wrapped 8 times with an insulated copper wire and each end of is attached to a 1.5 V battery, we find that it will lift the weight of 2 large paper clips. We hypothesized that for each 8 coils, you will be able to pick up one additional paper clip. When we ran the experiment, we observed and recorded that when we added 8 more wraps around the nail (16 coils) we could lift 4 paper clips and when we added 8 more wraps (24 coils) we could lift 6 paper clips. Choose the correct conclusion to the experiment.
1. We redesign the test and hope for better results.
2. We concluded that every time we add 8 wraps to the nail the total number of paper clips lifted doubled.
3. We concluded that our original test flawed. Because of the results, 8 coils should be able to pick up 2 paper clips. We will check our original test with a fresh battery.
4. We concluded that something went wrong with the experiment since it didn't give us the results we expected.
Answer:
2
Explanation:
i think that it would be 2 because it makes the most sense
Explain how measuring wavelength is different for transverse and longitudinal waves.
Please help! Its science!
Answer:
Wavelength is one way of measuring the size of waves. ... The wavelength of a transverse wave can be measured as the distance between two adjacent crests. The wavelength of a longitudinal wave can be measured as the distance between two adjacent compressions.
Explanation:
PLS HELP ME I WILL GIVE YOU BRAINLIEST
1.What are Tectonic Plates?
2.Explain the Role of each of Earth's Layers involved with the movement of Tectonic Plates...
3.What is Pangaea?
4.What natural processes do Tectonic Plate movements cause?
5.Explain the "Ring of Fire"
PLS USE YOUR OWN WORDS
What types of EM waves have you seen or used today? Describe them.
PLEASE HURRY I'M TIMED!
Answer:
none
Explanation: