Explanation:
Laws of Newton are
An object remains at its position of rest or motion until or unless any external force applied.Force=Mass×Acceleration.The initial momentum and final momentum remains same.Roadrunner speeds up from 2m/s to 10m/s in a distance of 10m. What is his acceleration?
d = v·t + (1/2)·a·t^2
a = 10m/s^2. t = 10s
v = 0m/s. Initial velocity
d = 0·10 + 10/2 · 10^2 = 0 +5·100
d = 500m
Which of the following is TRUE regarding the development and growth of new neurons in the human brain?
A. The human brain has the capacity to generate new neurons throughout the lifespan.
B. There is no evidence that the human brain continues to develop new neurons after birth.
C. Glial cells of human brains continue to reproduce and grow in number through adulthood but neurons do not.
D. Animals such as primates, birds, and rodents do not experience neurogenesis
The human brain has the capacity to generate new neurons throughout the lifespan (option b).
The correct statement regarding the development and growth of new neurons in the human brain is option A. The human brain has the capacity to generate new neurons throughout the lifespan.
1. Neurogenesis, the process of generating new neurons, was once believed to be limited to early brain development and not to occur in adulthood. However, recent research has challenged this notion.
2. Studies conducted on adult brains have provided evidence of neurogenesis occurring in specific regions of the brain, such as the hippocampus, which is involved in learning and memory.
3. Neurogenesis in the adult brain involves the generation of new neurons from neural stem cells. These stem cells have the ability to differentiate into mature neurons and integrate into existing neural circuits.
4. The process of neurogenesis is influenced by various factors, including environmental enrichment, physical exercise, and certain medications.
5. It is important to note that while neurogenesis occurs in the adult human brain, the rate of neurogenesis is relatively low compared to early brain development.
6. In contrast to option B, there is evidence to support the idea that neurogenesis continues to occur in the human brain after birth and throughout life.
7. Option C is incorrect because while glial cells, a type of support cell in the brain, can reproduce and grow in number throughout adulthood, neurons also have the capacity to generate new neurons.
8. Option D is incorrect as several animal species, including primates, birds, and rodents, have been found to experience neurogenesis in various stages of their lives.
In conclusion, option A is the true statement regarding the development and growth of new neurons in the human brain, as neurogenesis can occur throughout the lifespan.
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A small heat engine has an energy input of 1,176 joules, and does 201 joules of work. What is the efficiency of the engine? (round your answer to the nearest whole number percent, but leave off the % symbol)
so, if you calculate it is 13.3%, enter your number as 13.
The efficiency of the engine is 17%.
Given the following data:
Energy input = 1,176 JoulesEnergy output = 201 JoulesTo find the efficiency of the engine:
Mathematically, the efficiency of an engine is calculated by using the formula:
[tex]Efficiency = \frac{E_O}{E_I}[/tex] × [tex]100[/tex]
Where:
Eo is the energy output.Ei is the energy input.Substituting the given parameters into the formula, we have;
[tex]Efficiency = \frac{201}{1176}[/tex] × [tex]100[/tex]
[tex]Efficiency = 0.171[/tex] × [tex]100[/tex]
Efficiency = 17%
Therefore, the efficiency of the engine is 17%.
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London lives 1200 meters south of Chick-fil-A and is thinking about going there for lunch. When she is ready to leave, she realizes she left her wallet at her Aunt's house. She walks 750 meters to her aunt's house and then 1000 meters to Chick-fil-A. It took her 30 minutes to get from her house to Chick-fil-A. What was her distance traveled?
Answer:
1750 m
Explanation:
The distance traveled is the 750 meters to the Aunt's house plus the 1000 m from there to Chick-fil-A.
750 +1000 = 1750 . . . meters traveled
Explaining How Temperature Affects the Speed of a Wave
Does sound travel faster in a warm room or a cold room?
Explain your answer
Answer:
Warm Room
Explanation:
Sound, like any wave, is a transfer of energy from one particle to another.
As temperature rises, each particle will have more energy; they will collide into other particles more often.
As the frequency of collisions increase, the speed of which the sound wave is transferred increases.
how can you increase the sensitivity of a Mercury thermometer?
The sensitivity of a mercury thermometer can be increased by using a smaller mercury bulb, thinner wall and smaller bore. A smaller bulb contains less mercury and hence absorbs heat in shorter time. As a result it can response faster to temperature change.
According to astronomers, how many galaxies are distributed across the observable universe?
A. several thousand
B. 100 billion
C. 1 trillion
D. 50
Answer:actually it's 120 billion so you can choose 100 billion
Explanation:
Answer: 1 billion
Explanation:
HELP PLEASE!
A book sits motionless on a table. Which statement is true?
The downward force is greater than the upward force on the book.
There are no forces acting on the book.
The upward force is greater than the downward force on the book.
The forces acting on the book are balanced by each other.
Answer:
I think the second one! So sorry if it's wrong!
Explanation:
Because if it's sitting motionless, then nothing is happening to it.
A book sits motionless on a table so the forces acting on the book are balanced by each other.
What is force?
A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
A book sits motionless on a table that means forces acting on the book are balanced by each other. As book have mass so gravitational force acting in downward but opposite to that normal force because of friction is acting that stops book to be in motion.
A book sits motionless on a table so the forces acting on the book are balanced by each other.
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what characteristic feature do all anxiety disorders share?
Answer:
Something they all share is excessive worry that disturbs their normalized living style.
the law of conservation of energy also states that energy can be transformed ________
what will be there?
Question
What is the total distance traveled if you drive 5.0 miles to school, and then drive 5.0 miles back home?
10.0 miles
10.0 miles
25.0 miles
25.0 miles
0 miles
0 miles
not enough information
Answer:
10 miles
Explanation:
b/c distance all what we go 5+5=10
Look at the figure below and calculate the length of side y.
A. 8.5
B. 17
12
y
C. 6
O D. 12
45
Х
Answer:
I want to say a because you want to subtract and simplify
in the free body diagram. what is the net force?
A) 40 N, right
B) 10 N, right
C) 80 N
D) 32 N, right
Answer:
None of the suggested solutions.
Explanation:
horizontally, net force is
60cos30 - 20 = 31.96... 32 N right
which might be their desired answer.
There is also a vertical net force component.
vertically, net force is 40 + 60sin30 - 40 = 30 N up
total net force is
√(32² + 30²) = 43.834... 44 N
θ = arctan(30/32) = 43° above horizontal right.
Electrons are ____________ charged particles. Answer here
Answer:
negatively charged
Explanation:
Answer: electrons are negative charged
Explanation:
The neurocognitive model of dreaming argues that dreams:
A. reflect the waking concerns and preoccupations of the dreamer.
B. represent the fulfillment of repressed wishes and urges.
C. have no meaning whatsoever and simply reflect random neural firings in the brainstem.
D. contain images that disguise the dream's true psychological meaning.
Dreams Often Feature Intense Emotions
Dreams Often Feature Intense EmotionsIn some instances, these emotions can become so intense that they interrupt the dream or cause the dreamer to wake abruptly. The three most common emotions that become intensified by dreams are anxiety, fear, and surprise.
dream
dreamFirst, let examined the definition of dream according to Sigmund Freud “dream is the disguised fulfilment of a repressed wish. Dreams are constructed like a neurotic symptom: they are compromises between the demands of a repressed impulse and the resistance of a censoring force in the ego” (Freud, 28).
Bright light therapy is used to gradually shift sleeping patterns to what we consider normal. For treatment, the timing of light exposure is critical. For DSPS, the light must be delivered to the retina as soon after spontaneous awakening as possible to achieve the desired effect.
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Since the bullets also have zero velocity, a more exact description of the bullet's state would be _____.
Answer:
Static equilibrium.
Explanation:
When an object moves in a straight line, which statement is true?
A. the object moves at a constant speed, the resultant force is zero
B. the object accelerates , the resultant force is zero
C. the object moves at a constant speed, the forward force is greater than the resistive force
D. The object requires a resultant force in order to move at a constant speed
Answer:
In think the answer is a I’m not sure
Explanation:
Becuase constant speed is always zero there is no acceleration
3
Which finding would have disproved Virchow's hypothesis?
O Animalcules are not organisms.
O Animals are made of non-cell-based matter.
Plants are made of non-cell-based matter.
O Cells can generate from nonliving matter.
Answer:
the correct answer is cells can generate from nonliving matter
Calculate Speed The 2-kg metal ball moving at a speed of 3 m/s strikes a 1-kg wooden ball that is at rest. After the collision, the speed of the metal ball is 1 m/s.
Assuming momentum is conserved, what is the speed of the wooden ball?
Answer:
53466kg.
Explanatiokn:
A bucket crane consists of a uniform boom of mass
M = 201 kg and length L= 59.05 ft that pivots at a point on
the bed of a fixed truck. The truck supports an elevated bucket
with a worker inside at the other end of the boom, as shown in
the figure. The bucket and the worker together can be modeled
as a point mass of weight 201 lb located at the end point of
the boom.
Suppose that when the boom makes an angle of 68.7° with the
horizontal truck bed, the bucket crane suddenly loses power,
causing the bucket and boom to rotate freely toward the
ground. Find the magnitude of the angular acceleration la of
the system just after the crane loses power. Take the rotation
axis to be at the point where the boom pivots on the truck bed.
Use g = 9.81 m/s2 for the acceleration due to gravity. For unit
conversions, assume that 1 m = 3.28 ft and 1 lb = 4.45 N.
Express your answer to at least two decimal places.
Newton's second law for rotational motion allows finding the results for the angular acceleration of the system at the moment of losing power is:
α =0.616 rad / s²
Newton's second law for rotational motion relates the torque to the moment of inertia and the angular acceleration, in the special case where the angular acceleration is zero, it is called the rotational equilibrium condition.
[tex]\sum \tau = I \alpha[/tex]
[tex]\tau = F \ r \ sin \theta[/tex]
where τ is the torque, F is the force, r the distance to the pivot point and θ the angle between the force, the distance, I is the moment of inertia and α is the angular acceleration.
In this case they indicate the values in several different units, let's reduce to the international system of measurements (SI).
Beam mass M = 201 kg Beam length L= 59.05 ft (1m / 3.28 ft) = 18.0 m Worker and basket weight Wh = 201 lb (1N / 0.2248 lb) = 894.1 N Beam angle tea = 68.7º
We place our reference system at the base of the beam on the truck and counterclockwise turns as positive, and in the attached we see a free-body diagram of the system.
[tex]W_m \ L \ sin 68.7 + Mg \ \frac{L}{2} \ sin 68.7 = I \alpha[/tex]
The moment of inertia is an additive scalar quantity, the total moment of inertia is the moment of inertia of the pen plus the moment of inertia of the man.
Moment of inertia of the beam with respect to one end.
[tex]I_[/tex] = ⅓ ML²
moment of inertia of man
[tex]I_m = M_m L^2[/tex]
Let's substitute
[tex](W_m + \frac{Mg}{2} ) \ L \ sin 68.7 = (\frac{1}{3} M + m_m ) L^2 \alpha \\\alpha = \frac{(W_m + \frac{Mg}{2} ) sin 68.7 }{ (\frac{1}{3} M + m_m ) L }[/tex]
Let's calculate
The mass of man is
m = [tex]\frac{W_m}{g}[/tex]
m = 894.1 / 9.8
m = 91.2 kg
[tex]\alpha = \frac{(894.1 +2.1 \ 9.8 ) \ sin 68.7 }{ 18.0 ( \frac{201}{3} + 91 }[/tex]
α = 0.616 rad / s²
In conclusion using Newton's second law for rotational motion we can find the results for the angular acceleration of the system at the moment of losing power is 0.616 rad / s²
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when electricity is passed through aqueous solution of Sodium chloride following reaction takes place. Identify the correct combination of given options. (a). This process is called chlor-alkali process. (b). Chlorine gas is given off at the cathode, Hydrogen gas at anode and sodium hydroxide solution near cathode. (c). chlorine gas obtained in this process can be used as disinfectant. (d). Chlorine gas is given off at the anode, hydrogen gas at cathode and Sodium hydroxide solution formed near cathode. (e). sodium hydroxide solution is called brine. (f). The given equation doesn't obey law of conservation of mass.
Answer:
When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product. The balanced chemical equation is, This process is called as Electrolysis of Brin im in hardvard dont cheat and get good grades and become a graduate in hardvard
Explanation:
Please help on these two thanks
Explanation:
Number 29
= 10 N (from rocket) + 10 N (from wheels) - 7 N (from parachute 'cause force in other direction)
= 20 N - 7 N
= 13 N ✔
Number 30
= 100 N - 85 N
= 15 N to the left ✔
bro someone please help me, i need to turn this in by tomorrow first class of the day. if you can answer this page for me, please answer with a short sentence or paragraph if needed. thank you and please help me.
Answer: Sorry you I don't umderstand
Explanation:
A jumbo jet collides with a sparrow. If neither exerts a greater force of impact, which experiences greater acceleration and why
Answer:
The sparrow experiences a Much greater acceleration because of its smaller mass.
Explanation:
a = F/m With a constant force, acceleration is inversely proportional to mass.
how did the Ojibwe protect walleye populations?
a.) they count the total number of walleye eggs that a female lays each year.
b.) did you Spears to catch walleye.
c.) they only fish for walleye at night.
d.) they said a limit on the number and size of Walleye a spearfisher can catch.
The Ojibwe protected walleye populations as D. They said a limit on the number and size of Walleye a spearfisher can catch.
Wisconsin Walleye War was a series of protests regarding the fishing and hunting rights of the Ojibwes. Wisconsin wanted to regulate the rights of the people whenever they went fishing and hunting.
The protest eventually led to the state speaking to the people. This resulted in a resolution that there should be a limit on the number and size of Walleye a spearfisher can catch.
This was necessary in order to preserve the walleye for future generations.
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Peering through a telescope could be considered Step 1 of the scientific method.
True
False
A 5.0 kg flying squirrel is flying from a tree down to the ground at constant velocity. Consider air resistance. Diagram the forces acting on the squirrel
The free body diagram of the squirrel motion, the weight of the squirrel is acting downwards while the air resistance is acting upwards.
The given parameters;
mass of the squirrel, m = 5 kgacceleration due to gravity = 9.8 m/s²At a constant velocity downwards, the vertical acceleration is zero.
The downward force on the squirrel is calculated as follows;
W = mg - ma
W = m(g - a)
W = m(g - 0)
W = mg
W = 5 x 9.8
W = 49 N
The air resistance on the squirrel which is acting upwards is calculated as;
n = ma + mg
n = m(a + g)
n = m(0 + g)
n = mg
n = 5 x 9.8
n = 49 N
The free body diagram is presented below;
↑ n
Ο
↓ W
Thus, in the free body diagram of the squirrel motion, the weight of the squirrel is acting downwards while the air resistance is acting upwards.
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A block m1 rests on a surface. A second block m2 sits on top of the first block. A horizontal force F applied to the bottom block pulls both blocks at constant velocity. Here m1 = m2 = m.
(a)
What is the normal force exerted by the surface on the bottom block? (Use the following as necessary: m and g as necessary.)
Answer:
N = 2mg
Explanation:
Assuming the surface is horizontal
The surface must provide enough normal force to prevent the masses from accelerating in the vertical direction.
(a) The normal force exerted by the surface on the bottom block is N1 = 2mg.
Given that,
A block m1 rests on a surface. A second block m2 sits on top of the first block. A horizontal force F applied to the bottom block pulls both blocks at constant velocity. Here m1 = m2 = m.Based on the above information, we can say that the N1 is 2mg.
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What is needed to complete the equation representing cellular respiration?
+ Oxygen - Carbon Dioxide + Water + Energy
O Glucose
Nitrogen
O Sunlight
ОАТР
Answer is sunlight
Explanation :
Answer:
glucose is needed
Explanation:
I just learnt it last week and here is what it says in my notes.
Oxygen is in,
water is in,
carbon dioxide is in,
engery(which is sunlight) is in,
what is not in is glucose.
(03.02 LC)
Which of the following is a complementary base pair for DNA?
O Adenine and cytosine
O Guanine and cytosine
O Adenine and guanine
O Cytosine and thymine
Answer:
O Adenine and guanine
Explanation:
i think tell me if im rong
Guanine and cytosine are complementary base pairs for DNA, hence option B is correct.
What is the complementary base pairing in DNA?Adenine and thymine are joined by two hydrogen bonds, whereas guanine and cytosine are joined by three hydrogen bonds.
Base pair of DNA. The nitrogen-containing bases adenine (A), thymine (T), and cytosine (C), as well as guanine (G), the couple together under normal conditions. The structure of DNA is created by the binding of these base pairs.
In order to construct the helical structure of DNA, complementary base pairing is crucial because it enables the base pairs to be placed in the most energetically advantageous manner.
Therefore, due to the fact that it permits semiconservative replication, it is also crucial in replication.
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