you went to move a 41 kg bookcase to a different place in the living room. if you push with a force of 65 N and the bookcase accelerates at 0.12 m/s2 what is the coefficient of kinetic friction between the bookcase and the carpet?
Answer:
the force of friction = fk = (uk)n = 402(uk)
the net force acting to accelerate bookcase = ma = (41)(0.12) = 4.9 N
the {assumed horizontal} push force = 65 N
so
65 - fk = 4.9
fk = 65 - 4.9 = 60 N
uk = 60/402 = 0.15 <= ANS
What happens when a light beam passes from air into water? Select all that app
the light wave slows down in water
refracted light bends in the water
some of the light is reflected off of the surface
total internal reflection
the light wave speeds up in water
Answer:
Some light is reflected off of the surface of the water
How long will it take Matthew to jog 321 m at 5.8m/s?
What is the relationship between an object's mass and an object's inertia?
Referring to Newton's 2nd Law of Motion, what is the relationship between force and acceleration?
Which has more inertia?
A: A feather
B: A grain of sand
C: A boulder
Answer:
C
Explanation:
Newton's 1st law of motion states: More Mass = More Inertia. Less Mass = Less Intertia. The boulder has more mass, meaning it's got more intertia.
PLEASE HELP ASAP
I know this is not physics just please help.
Answer:There you go
Explanation:
The rock cycle works by the rocks moving around. Weathering and erosin makes sediment or something like sand, that sand is put under a lot of pressure until it becomes a solid mass. After that heat and more pressure are added to the rock to make it metamorphic. after that it is heated again until it becomes magma. the ignious rock is made by the cooling of the lava( its lava when it gose above ground). Then the whole cycle repeats.
help asap pls and thank you
1. James Naismith
2. 1891
3. City College of New York
12.13) PLZ HELP ASAP
I don't know if I am right or wrong
When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forward?
A: The car moves in reverse more rapidly than the book.
B: The friction of braking transfers energy to the book
C: The book’s inertia causes it to continue moving
Answer:
C
Explanation:
The answer is c because Newton’s third law states “ for every action there is an equal and opposite reaction.” Since the car quit moving the book did not stay at rest because there was a reaction.
Answer:
C
Explanation:
Newton's 1st law of motions states : " Intertia: A objects resistance to change. More mass= more intertia. Less mass= Less intertia.
it ALSO states that an object at rest will stay at rest, until an outside forces acts upon the object, forming an unbalanced force.
The car stopping suddenly is the outside force, and the book sliding forward is the intertia to change.
How have sanitation systems impacted society today?
Anyone who guesses what this means gets brainliest answer!!
guten tag
wie geht es dir
those are the words you need to translate correct!! NO USING A TRANSLATOR
Answer:
I believe this is German for something day how are you????? I was talking about the holocaust again in school and decided to start learning German so if im wrong then.. wowww!
Explanation:
5) help plz I need help
I don't know if I am right so if I am not can you plz help me
the answer is waning Gibbous
The Waning Gibbous is an intermediary Moon phase. It starts right after the Full Moon, and it lasts until the Third Quarter.
Answer:
the answer is waning gibbous
How does the average speed of the atoms in a substance compare to the average speed of the atoms in a substance with a lower temperature?
Answer:
yes it does
Explanation:
5. A 1-kg car and a 2-kg car are both released from the top of the same hill and roll down a frictionless track. At the bottom of the hill, which car will have the greater
speed? Which car will have the greater Kinetic energy?
O A The 1-kg car will have greater speed, and the 2-kg car will have greater kinetic energy
OB. The 2 kg car car will have greater speed, and the 7-kg car will have greater kinetic energy
OC. The cars will have equal speeds and equal kinetic energies.
OD. The cars will have equal speeds and the 2 kg car will have greater kinetic energy
The cars will have equal speeds and the 2 kg car will have greater kinetic energy.
Answer: it’s D.The cars will have equal speeds and the 2 kg car will have greater kinetic energy.
Explanation:Each car experiences the same gravitational acceleration of 9.81 m/s2, so each car will reach the bottom of the track with the same speed. The heavier car will have greater kinetic energy because the kinetic energy of an object is proportional to its mass.
Sickle cell anemia is a recessive trait (aa) which causes a red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen to the body. Individuals with the genotype AA have normal red blood cells. Those individuals who are heterozygous for the trait usually have no symptoms of sickle cell disease, but carry the sickle cell trait and can pass it on to their offspring. However, those individuals who carry the sickle cell trait have some protective advantage against malaria, making this a common genotype in malaria prone areas. The graph illustrates the frequencies of two genotypes, AA and Aa, over many generations. Select ALL the conclusions you can draw from the graph provided.
A) There appears to be random mating between genotypes.
B) There is no selective advantage for one genotype over another.
C) This graph probably represents a population in a malaria-prone area.
D) The population reached equilibrium for these traits at about generation 35.
E) Sickle cell disease has died out of this population and will most likely not return.
Answer:A is your answer 2020 edg
Explanation:
The conclusion which can be drawn from the graph is that there appears to be random mating between genotypes.
What is a Graph?This is defined as the pictorial representation of data in an organized manner.
The graph shows that there is random mating between the genotypes due to the non-uniformity observed thereby making option C the most appropriate choice.
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which material would you use as the metallic core of an electromagnet?
Milk carton assessment graphic
Group of nails assessment graphic
Wooden dowels assessment graphic
Can of cola assessment graphic
Answer:
group of nails assessment graphic,
Explanation:
ILL GIVE BRAINLYIST!!
If earth receives more energy than it spends back to space, what can we expect to happen?
A ) The temperature on earth will decrease
B ) The temperature on earth will increase
C ) The temperature on earth will stay the same.
D ) earths energy budget will be balanced.
2. If a earth receives more energy than it emits, what would you expect to happen
A ) The temperature on earth will decrease
B ) The temperature on earth will increase
C ) The temperature on earth will stay the same.
D ) earths energy budget will be balanced.
ANSWER : A.. The temperature on earth will decrease
If a ship is moving forward has positive acceleration what can be said about the velocity of the ship?
Answer:
i think the ship moves in the positive direction with a changing velocity. An object which moves in the positive direction has a positive velocity.
Explanation:
Is Earth's mantle denser than the crust? PLS HURRY
The mantle, which contains more iron, magnesium, and calcium than the crust, is hotter and denser
Explanation:
because temperature and pressure inside the Earth increase with depth
How can you increase the rate of a reaction? Select all that apply. *
Introduce a catalyst
Increase temperature
Increase the concentration of products
Decrease concentration of reactants
Answer:
- Increase the concentration of the reactants
-increase the temperature
- introduce a catalyst
The rate of reaction is increased by:-
Increase the concentration of the reactantsincrease the temperatureintroduce a catalyst.What is the rate of reaction?The speed at which a chemical reaction occurs is known as the reaction rate or rate of reaction. It is proportional to the rise in product concentration per unit of time and the fall in reactant concentration per unit of time. Reaction times can differ wildly.
A chemical reaction is a procedure that causes one group of chemical substances to change chemically into another.
The rate of a chemical reaction can be increased by Increasing the concentration of the reactant by increasing the temperature and by introducing a catalyst.
Therefore, the rate of reaction can be increased by doing the actions explained above in the answer.
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2 Physic Questions For 20 Points ✨
1. Pick a planet (other than Earth) and describe 5 characteristics that you know about it. Be as specific as possible.
2. What are various features of the moon and how did they form?
All answers need an explanation
Sometimes people refer to Mars as the Red Planet. Because of the rusty iron in the earth, it is red. Mars features weather, polar ice caps, canyons, volcanoes, and seasons just like Earth. Its atmosphere, which is composed of carbon dioxide, nitrogen, and argon, is extremely thin. These define Mars' characteristics.
These are some of the characteristics of the moon, which is the only natural satellite of Earth and the nearest huge celestial body. It is a spherical rocky body that revolves around Earth in a somewhat eccentric orbit at a mean distance of around 384,000 km (238,600 miles), perhaps with a tiny metallic core. It has a 1,738 km (1,080 miles) equatorial radius.
What is planet ?A celestial body inside the Solar System that meets the following criteria is referred to as a "planet": (a) it must be in orbit around the Sun; (b) it must have enough mass to overcome rigid body forces and take on a hydrostatic equilibrium form that is almost circular; and (c) it must have cleared the area in and around its orbit.
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An astronaut floating in space throws a wrench forward with the force of 10 N.
How much force does the wrench apply to the astronaut?
A. greater than 10 N
B. less than 10 N
C. zero; the wrench does not apply a force
D. exactly 10 N
The wrench applies greater than 10 N force to the astronaut. The correct option is A.
What is Newton's third law of motion?Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
When the astronaut throws the wrench forward with a force of 10 N, the wrench will apply an equal and opposite force of 10 N to the astronaut in the opposite direction.
Here other options are,
Option B. Less than 10 N is not true because the force applied by the wrench to the astronaut is equal and opposite to the force applied by the astronaut to the wrench, which is 10 N.
Option C. zero; the wrench does not apply a force is not true because the wrench is exerting a force on the astronaut in the opposite direction to the direction in which the wrench is thrown.
Option D. exactly 10 N is not true because the force applied by the wrench to the astronaut is equal and opposite to the force applied by the astronaut to the wrench, which is 10 N, and the two forces act in opposite directions.
Therefore, the force applied by the wrench to the astronaut is greater than 10 N.
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Take your time
Does the mass of an object determine how far something goes?
Ex; A toddler kicking a ball, if it was older, could the ball have gone a faster rate?
Answer:
y e s
Explanation:
the older the child would be the faster the ball would have gone, a child has far less mass than the ball but once that child grows up they'd have more mass/strength to kick the ball with
An atom of nitrogen contains seven electrons. Describe the number of
electrons in each energy level in an atom of nitrogen.
Answer:
Two of the electrons are in the first energy level while the other five are in the second energy level.
Explanation:
.
An atom of nitrogen has 2 electrons in first energy level and 5 electrons in second energy level.
What is an energy level?Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.
Energy of the stationary state is given as E= -R
1/n² where R
is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.
They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.
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Gregor Mendel finished his pea plant experiments in 1863 and published his results in 1866. However, few scientists saw Mendel's paper for three decades. Even after all that time, Mendel's discoveries revolutionized the field of genetics. What did Mendel discover about the principles of heredity? Choose the two statements that apply. Select 2 correct answer(s) Question options: A Individuals get one factor for a trait from each parent. B Genetic material is genes on DNA. C A dominant factor can hide the expression of a recessive factor when both are present. D Mothers contribute factors for some traits while fathers contribute factors for others. if you do not know do not answer or you will be reported selet two answer
Answer:
it would be Individuals get one factor for a trait from each parent. and dominant factor can hide the expression of a recessive factor when both are present.
Mendel discovered about the principles of heredity: A) Individuals get one factor for a trait from each parent and C) A dominant factor can hide the expression of a recessive factor when both are present.
What are Mendel's discoveries revolutionized the field of genetics?Gregor Mendel uncovered the basic principles of inheritance through his study on pea plants. He concluded that genes are inherited from each parent as separate, paired units. Mendel observed how parental genes separated and if they showed up as dominant or recessive qualities in the children. He was aware of the mathematical patterns passed down from one generation to the following.
Mendel's Laws of Heredity are typically expressed as follows:
1) The Law of Segregation: A gene pair determines each inherited trait. So that each sex cell only contains one of a pair of parental genes, parental genes are arbitrarily distributed to the sex cells. Therefore, when sex cells combine to form offspring during fertilisation, they receive one genetic allele from each parent.
2) The Law of Independent Assortment: Different qualities' genes are grouped independently of one another so that inheriting one trait does not affect inheriting another.
3) The Law of Dominance states that an organism with two possible gene variants will express the dominant form.
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i swear this is the last question
Which of these is NOT a way to think about finding ‐12−7?
A)The number 7 units to the left of ‐12 on the number line
B)The negative distance between ‐12 and 7 on the number line
C)Changing the signs and the operation: 12+−7
D)The addition expression: −12+−7
PLSSSSSSSSSSSSS
Answer:
C
Explanation:
12+-7=/=-12-7
12+-7=5
-12-7=-19
Answer:
the answer is c
Explanation:
Check b and c plz :DD
The beam in a cathode ray tube is moved by an electric force. What did
scientists infer about atoms from this experimental result?
O
A. Atoms are small particles that cannot be destroved or divided.
O
B. Atoms have a dense, positively charged center.
O
C. Electrons have more energy the farther they are from the nucleus.
O
D. Atoms are made up of smaller particles.
The beam in a cathode ray tube is moved by an electric force. what scientists inferred about atoms from this experimental result is that atoms are made up of smaller particles. This is further explained below.
What is an atom?Generally, The fundamental of chemistry is the atom. It's the smallest unit of matter that can be split without releasing electrically charged particles.
In conclusion, Scientists deduced from this experimental result that atoms are formed up of smaller particles.
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PLEASE HELP! ILL GIVE BRAINLY!!
If earth receives more energy than it spends back to space, what can we expect to happen?
A ) The temperature on earth will increase.
B ) The temperature on earth will increase.
C ) The temperature on earth will stay the same.
D ) Earth’s energy budget will be balanced.
A cyclist turns a corner with a radius of 50m at a speed of 10m/s. What is the cyclist's acceleration?
Answer:
2 m/s^2
Explanation:
a = v^2/r
a = (10m/s)^2 / 50m
a = 2 m/s^2
Leave a like and mark brainliest if this helped
Leave a like and mark brainliest if this helped
A cyclist turns a corner with a radius of 50m at a speed of 10m/s. The cyclist's acceleration is 2 m/s².
What is acceleration?The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration. The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.
a = v²/r
a = (10m/s)² / 50m
a = 2 m/s²
A cyclist turns a corner with a radius of 50m at a speed of 10m/s. The cyclist's acceleration is 2 m/s².
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What is the role of the nervous system?
Which parts of the body make up the central nervous system?
Name the two main categories of the nervous system.
How do the muscular, skeletal, and nervous systems work together to maintain homeostasis?
What do sensory neurons do?
What do motor neurons do?
Nervous System Video: Please answer each question by filling in the blanks, using the words from the bank below.
Word Bank: brain, instincts, interpreted, organs, reflexes, spinal cord, senses
The central nervous system includes the _______ and _______.
Signals from _______ and the body's _______ are received by the brain and the spinal cord.
Once signals are processed and _______ by the central nervous system, a response is sent back to the body.
A central nervous system is also responsible for programming _______ and _______.
Paraplegic Will Walk Again with Exoskeleton at the World Cup Video:
What animal did scientists study to create the brain–machine interface?
What does the exoskeleton use to power its movements?
What is the importance of this research?
