Humans need sleep to help their brains function properly. The topic sentence in the given paragraph is "Humans need sleep to help their brains function properly." This sentence introduces the main idea of the paragraph, which is the importance of sleep for brain functioning.
1. The paragraph begins by stating that humans need sleep to help their brains function properly.
2. It further explains that the brain requires a minimum number of hours to rest and organize itself.
3. The number of hours needed for sleep depends on age, with babies needing an average of 14 to 16 hours of rest daily.
4. In contrast, adults can function on about 6 to 8 hours of sleep.
5. The paragraph mentions that scientists are not completely sure about the specific activities of the brain during sleep periods.
6. However, they do know that the brain sorts and stores information and replaces chemicals when a person sleeps.
Overall, the paragraph discusses the significance of sleep for brain function and highlights that sleep plays a role in information processing and chemical restoration in the brain. The topic sentence sets the stage by emphasizing the importance of sleep for humans' brain functioning, and the subsequent sentences provide additional details and explanations related to the topic.
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Why can’t you hit a feather in mid air with a force of 200 N
(This is all the info I was given)
When two atoms bond chemically it is because of the interaction between
A) the nuclei of each atom.
B) the protons in each atoms.
C) all electrons in the atoms.
D) the valence electrons in each atom.
Pls hurryyyy!!!
Answer:
Explanation:D
When two atoms bond chemically it is because of the interaction between the valence electrons in each atom because only the valence electrons of an atom are responsible for the chemical activity.
Therefore the correct answer is option D.
What is a chemical reaction?A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products.
Because only an atom's valence electrons are responsible for the chemical activity and because the quantity of valence electrons indicates an atom's valency,
Valency is a highly important requirement for the chemical reactivity of any element, two atoms connect chemically as a result of their contact.
Thus, the correct answer is option D.
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notes of diffusion
You need to exercise your body in the same what that you are going to use it.
Answer:
mjm
Explanation:
What happens to most bones when we break theAlways include the steps and/or background required to get to the final answer. Let’s help other people understand and solve future problems on their own.
how does the interstellar medium affect our view of most of the galaxy?
Answer: It prevents us from seeing most of the galactic disk with visible and ultraviolet light.
(hope this helps) :)
Which of the following would require more energy to heat it from 10°C to 20°C?
a. 200 kg of water
b. 200 kg of aluminum
C. 100 kg of steel
Answer:200kg of water
Explanation:
physics
is my choice correct?
correct me pls if not
Answer:
correct
Explanation:
if wrong sorry btw have a great day
Công thức tính quãng đường đi được của chuyển động thẳng biến đổi đều là:
At time t = 0 the velocity is v1. Therefore C1 = v1 and C2 = x1. Equations (1), (2), (3), and (4) fully describe the motion of particles, or bodies experiencing rectilinear (straight-line) motion, where acceleration a is constant.
an object applies force of 500n on the area if 10m². find the force exerted
Exerted force is called Pressure.
From,
Pressure = Force/Area
P = 500N/10m²
P = 50N/m²
The force exerted is 50N/m²
__________ is an example of a directional research hypothesis.
Answer:
Directional hypothesis is an example of a directional research hypothesis.
Explanation:
Directional hypothesis: A directional (or one tailed hypothesis) states which way you think the results are going to go, for example in an experimental study we might say…”Participants who have been deprived of sleep for 24 hours will have more cold symptoms in the following week after exposure to a virus than
Which can lead scientists to change a theory that has already been accepted? Check all that apply.
changes to scientific laws
new experimental methods
new hypotheses
technological inventions
repetitions of old experiments
Answer:
B, C, and D
Explanation:
Question 5 of 10 Which two factors affect the amount of thermal energy an object has? A. The amount of space between its particles B. The mass of the object C. The amount of motion its particles have D. The directions in which its particles are moving
Answer: A: The Mass of Object AND D. The amount of motion it’s particles have
A ball Of Mass. 0.5 kg initially at rest is kick directly toward offense from appoint 20 m away as shown below the velocity of the ball as it leaves the kickers foot is 16 M/S at angle 45 degrees above the horizontal the top of the fence is 4 m high the ball hits nothing Wallen flight and a resistance is negligible the acceleration due to gravity is 9.8 M/S^2 determine the time it takes for the ball to reach the plane of the fence.
Answer:
a. The horizontal component of the velocity is constant so vxt = d where vx = v0 cosθ = 16m/s t = d/v = 2s
b. The height of the ball during its flight is given by y = v0yt + ½ gt2 where v0y = v0sinθ = 12m/s and g = –9.8m/s2 which gives at t = 2s, y = 4.4m. The fence is 2.5m high so the ball passes above the fence by 4.4m – 2.5m = 1.9m
Explanation:
solve this question please
Answer:
[tex]( \nwarrow^{ + }) \sum \: F_{{y_{A}}_{2kg}} = F_{{y_{N_A}}_{2kg}} - m_{{y_{A}}_{2kg}}g \cos( \theta_{{y_{A}}_{2kg}}) = 0 \\ F_{{y_{N_A}}_{2kg}} = m_{{y_{A}}_{2kg}}g \cos( \theta_{{y_{A}}_{2kg}})...(1) \\ ( \nearrow^{ + }) \sum \: F_{{x_{A}}_{2kg}} = F_{{x_{T}}} - m_{{y_{A}}_{2kg}}g \sin( \theta_{{y_{A}}_{2kg}}) -F_{{Fr}_{A2kg}}= m_{{y_{A}}_{2kg}}a...(2) \\ \\ ( \nearrow^{ + }) \sum \: F_{{y_{B}}_{5kg}} = F_{{y_{N_B}}_{2kg}} - m_{{y_{B}}_{5kg}}g \cos( \theta_{{y_{B}}_{5kg}}) = 0 \\ F_{{y_{N_B}}_{5kg}} = m_{{y_{B}}_{5kg}}g \cos( \theta_{{y_{B}}_{5kg}})...(3) \\ ( \searrow^{ + }) \sum \: F_{{x_{B}}_{5kg}} = m_{{y_{B}}_{5kg}}g \sin( \theta_{{y_{B}}_{5kg}})-F_{{x_{T}}} -F_{{Fr}_{B5kg}}= m_{{y_{B}}_{5kg}}a...(4)[/tex]
Explanation:
All you need to do is plug in the values and solve the simultaneous equations to find the acceleration a, and T.
Always draw the free body diagram...
Explain how solar and lunar eclipse occur with the help of a labelled diagram.
Answer:
a solar eclipse occurs when the moon passes in front of the sun,blocking it out partially or completely. the eclipse results in parts of the earth being covered in the shadow of the moon. a lunar eclipse occurs when the moon passes directly behind earth and into its shadow.
Explanation:
I have worked with so many writers who worry their
inconsistent memory is not sharp enough, exact enough, or
reliable enough for them to capture childhood moments with
any authority, and, of course, science had proven the fallibility
of memory time and time again.
O NO CHANGE
O has proven
O had proved
O proved
Help
Answer:
has proven had proved proved no change
Answer:
I believe it's the second option "has proven"
Explanation:
It just sounds like it fits better.
Sorry if it's wrong btw.
Vector A has a magnitude of 8.0 m and points 30 degrees north of east; vector B has a magnitude of 6.0 m and points 30 degrees west of north; and vector C has a magnitude of 5.0 m and points 30 degrees west of south. The resultant vector A + B + C is given by:
A) 2.1 m at an angle 66 degrees east of north.
B) 5.9 m at an angle 74 degrees north of east.
C) 2.7 m at an angle 74 degrees north of east.
D) 5.1 m at an angle 74 degrees north of east.
E) 4.8 m at an angle 74 degrees east of north.
The resultant vector A + B + C is approximately 5.1 m at an angle 74 degrees north of east.
To find the resultant vector A + B + C, we need to break down each vector into its horizontal (x) and vertical (y) components, and then add them together.
Given:
Vector A: magnitude = 8.0 m, angle = 30 degrees north of east
Vector B: magnitude = 6.0 m, angle = 30 degrees west of north
Vector C: magnitude = 5.0 m, angle = 30 degrees west of south
Let's calculate the x and y components for each vector:
For Vector A:
A_x = 8.0 m × cos(30°)
A_x = 8.0 m × 0.866
A_x ≈ 6.928 m
A_y = 8.0 m × sin(30°)
A_y = 8.0 m ×0.5
A_y = 4.0 m
For Vector B:
B_x = 6.0 m × sin(30°)
B_x = 6.0 m × 0.5
B_x = 3.0 m
B_y = 6.0 m × cos(30°)
B_y = 6.0 m × 0.866
B_y ≈ 5.196 m
For Vector C:
C_x = 5.0 m × sin(30°)
C_x = 5.0 m ×0.5
C_x = 2.5 m
C_y = 5.0 m × cos(30°)
C_y = 5.0 m × 0.866
C_y ≈ 4.33 m
Now, let's add up the x and y components:
Resultant x component = A_x + B_x + C_x
Resultant x component = 6.928 m + 3.0 m + 2.5 m
Resultant x component ≈ 12.428 m
Resultant y component = A_y + B_y + C_y
Resultant y component = 4.0 m + 5.196 m + 4.33 m
Resultant y component ≈ 13.526 m
Finally, we can find the magnitude and angle of the resultant vector:
Resultant magnitude = sqrt((Resultant x component)² + (Resultant y component)²)
Resultant magnitude = sqrt((12.428 m)^2 + (13.526 m)^2)
Resultant magnitude ≈ 18.015 m
Resultant angle = arctan(Resultant y component / Resultant x component)
Resultant angle = arctan(13.526 m / 12.428 m)
Resultant angle ≈ 48.413°
Considering the answer choices provided:
A) 2.1 m at an angle 66 degrees east of north.
B) 5.9 m at an angle 74 degrees north of east.
C) 2.7 m at an angle 74 degrees north of east.
D) 5.1 m at an angle 74 degrees north of east.
E) 4.8 m at an angle 74 degrees east of north.
The closest match to our calculated result is:
D) 5.1 m at an angle 74 degrees north of east.
Therefore, the resultant vector A + B + C is approximately 5.1 m at an angle 74 degrees north of east.
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Derive the relationship between g and G using the relationship calculate the value of g on earth
Answer:
A
Explanation:
What do you think will happen to current if we increase or decrease the resistance of the connecting wire?
Answer:
If resistance is increased, the current decreases and if the resistance is decreased, the current flowing through the wire increases.
Explanation:
V = IR is ohm's law which implies I = V/R, where I is the current and V is the voltage and R is the resistance. Hence, I is inversely proportional to R.
calculate the surface area of a circle with radius 3.5 CM
........loke above in the picture
springs can stretch; so can different materials, including
In the absence of friction, explain why the horizontal component of a projectile’s velocity is a constant.
Answer:
This downward force and acceleration results in a downward displacement from the position that the object would be if there were no gravity. The force of gravity does not affect the horizontal component of motion; a projectile maintains a constant horizontal velocity since there are no horizontal forces acting upon it
constraints for the sub-problem for pollution
Hope this helps ♡♡
Which pair correctly identifies the strongest and weakest fundamental forces with the strongest force listed first
Answer:
Actually, gravity is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity
Explanation:
Mark me the Brainliest..pls..
in 10 seconds a car accelerates 4m/s^2 to 50
m/s. How fast was the car going before it accelerated?
Variables:
Equation and Solve:
Answer:
10m/s
Explanation:
using the formula a=v-u
t
9- Where did Rutherford propose that most of the mass of an atom
resided?
a) In the middle of the atom
b) Along the edge of the atom
c) Scattered throughout the atom
d) Orbiting around the atom
Answer:
A) in the middle of the atom
Explanation:
He concluded that all of the positive charge and the majority of the mass of the atom must be concentrated in a very small space in the atom's interior, which he called the nucleus.
What is Obama's last name? PLZ PLZ PLZ THIS IS 500% OF MY GRADE PLS HELP PLS
Answer:
Barack Hussein Obama II
Explanation:
I think
Find out fastest to slowest will give brainlesa
Answer:
The fastest thing in the universe is the speed of light, the slowest is a hypothetical object that isn't moving relative to the entire universe.
A golf ball is launched horizontally at a speed of 11 meters per second and a high of 6.4 m above the ground. How long will it take for the golf ball to reach the ground?
The answer is A.
t = ( 2h / g )^1/2 = ( 2 x 6.4 / 9.8 )^1/2 = 1.14s
a dog is running at 5.5 m/s then comes to a complete stop in 1.5 seconds. What is the dogs acceleration?
The dog's acceleration running at 5.5 m/s then comes to a complete stop in 1.5 seconds is 8.25m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving object can be calculated by multiplying the velocity of the object by the time taken. That is;Acceleration (m/s²) = speed (m/s) × time (s)According to this question, a dog is running at 5.5 m/s then comes to a complete stop in 1.5 seconds. The acceleration can be calculated as follows:Acceleration = 5.5 × 1.5Acceleration = 8.25m/s²Therefore, the dog's acceleration running at 5.5 m/s then comes to a complete stop in 1.5 seconds is 8.25m/s².Learn more at: https://brainly.com/question/19573976?referrer=searchResults
