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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How much force is needed to get a 0.9kg block of wood to slide if the static coefficient of friction is 0.8
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
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.
(May give brainliest) Answer This Please!
Answer:
I was gonna answer but its old
Explanation:
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 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:
._.
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
Explain when do we have an acceleration.
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:
What types of EM waves have you seen or used today? Describe them.
PLEASE HURRY I'M TIMED!
Answer:
none
Explanation:
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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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.
All the organelles in a cell work together to help the cell and the whole organism function. Some diseases are caused by the failure of one type of organelle. Read the description below of an example of this type of disease.
Lauren has cystic fibrosis. Her body is unable to control the flow of salt into and out of her cells. Lauren’s symptoms include coughing and wheezing when she tries to exercise. She receives breathing treatments that let her swim, dance, and sing. Which organelle is affected by Lauren's disease?
A. endoplasmic reticulum
B. cell membrane
C. cytoplasm
D. cell wall
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 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
Although two identical objects may have the same mass and the same weight (meaning that the force of gravity is the same for both), they may not fall to Earth at the same rate. This is because of air resistance. Any object that is falling has friction, or resistance, from the air. The larger the object, the more resistance it has as it falls.
Get two identical pieces of paper. Crumple one up into a ball, but leave the other one a flat sheet. Drop both pieces of paper off a high place at the same time. What happens? Which falls faster? Record your observations and make a conclusion, using the terms “mass,” “weight,” “force,” “resistance,” and “gravity.”
MUST BE AT LEAST 4 sentences and include the terms weight, force, resistance, and gravity.
Answer:
the paper ball falls faster and the unfolded paper falls at a slower rate
Explanation:
this is because gravity is pulling both objects down to the ground and hence they are falling. Both objects have the same mass and weight but the resultant force of the paper ball is smaller than that of the unfolded paper. The unfolded paper has a larger surface area and so a larger force is acted upon it, meaning there is more air resistance. This shows that the paper ball falls faster than the unfolded paper.
The air resistance acting on the crumpled ball will be less and hence it will fall faster.
What is Air resistance?
Air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. The larger the object, the more resistance it has as it falls.
Mathematically, we can write it as -
F = [tex]\frac{1}{2} C_{D}[/tex] × ρv²A
Given are two identical pieces of paper such that one is crumpled up into a ball and the other one is left as flat sheet.
Now, as you throw both, the crumpled up ball and the flat sheet, the crumpled up ball will fall faster. The main reason behind this is that the total surface area of the crumpled ball in contact with the air is less than compared to that of the flat sheet. Air resistance on the crumpled ball with surface are in contact [say A(c)] can be written as -
F[1] = [tex]\frac{1}{2} C_{D}[/tex] × ρv²A(c)
And that on the flat sheet with area of contact with the air [say A(f)] can be written as -
F[2] = [tex]\frac{1}{2} C_{D}[/tex] × ρv²A(f)
Now as A(f) > A(c), therefore F[2] > F[1]
Therefore, the air resistance acting on the crumpled ball will be less and hence it will fall faster.
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