The final velocity of the ball is16.66 m/s.
Given the following data:
Initial velocity, U = 0 m/s (since the ball is falling from rest). Time, t = 1.70 seconds.We know that acceleration due to gravity (a) for a ball in free fall is equal to 9.8 meter per seconds square.
To find how fast (velocity) the ball is moving, we would use the first equation of motion:
Mathematically, the first equation of motion is calculated by using the formula;
[tex]V = U + at[/tex]
Where:
V is the final velocity. U is the initial velocity.a is the acceleration. t is the time measured in seconds.Substituting the given parameters into the formula, we have;
[tex]V = 0 + 9.8(1.7)[/tex]
[tex]V = 9.8[/tex] × [tex]1.70[/tex]
Final velocity, V = 16.66 m/s.
Therefore, the final velocity of the ball is16.66 m/s.
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Which statement is TRUE regarding the sleeping brain?
A. Some brain neurons remain active during sleep, while others do not.
B. The sleeping brain is idle.
C. Sleep is a global, brain-wide state.
D. All brain areas are shut down during sleep.
Many biological processes happen during sleep: The brain stores new information and gets rid of toxic waste. Nerve cells communicate and reorganize, which supports healthy brain function. The body repairs cells, restores energy, and releases molecules like hormones and proteins.
The true statement regarding the sleeping brain is: sleep is a global, brain-wide state, which is in option c as sleep is not a state of idleness or a shutdown of all brain areas.
Sleep is a complex and dynamic process that involves various regions and functions of the brain. While some brain neurons may decrease their activity during certain stages of sleep, other neurons remain active and play crucial roles in regulating sleep processes. Sleep is considered a global state because it involves widespread changes in brain activity and connectivity. Different brain regions exhibit synchronized patterns of activity during specific sleep stages, and these patterns contribute to functions such as memory consolidation, restoration, and emotional processing.
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A 8 kg brick is sitting on a frictionless table. If a 60 N horizontal force is applied to the brick and it accelerates at 2 m/s2, what will be the force of friction
a.24
b.44
c.0
d.600
In the Freebody diagram the magnitude of the normal force is 40 N, the friction force is 25N, the net force is 80N. what is the magnitude of the applied force?
Answer:
Explanation:
Without the FBD or a good description of the set up, I'd have to say we cannot tell.
If the set up is of the simplest form with a mass on a horizontal surface being acted on by a horizontal force, then that force must be 80 + 25 = 105 N.
As force is a vector, there are an infinite number of other possibilities for force magnitude depending on which direction the force is acting. The mass is also an unknown variable that would affect the applied force magnitude if the direction is not horizontal.
Daily variations in biological and psychological processes, such as blood pressure and the secretion of hormones, are called:
A. free-running conditions.
B. REM rebound effects.
C. circadian rhythms.
D. delta brain wave activity.
How Biological Rhythms Work
How Biological Rhythms WorkDiurnal (night and day)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)
How Biological Rhythms WorkDiurnal (night and day)Circadian (24 hours)Ultradian (less than 24 hours)Infradian/Circalunar (1 month)Circannual (1 year)
physical science 5.03b worksheet
6. A 0.10-kilogram bird is flying at a constant speed of 8.0 m/s. What is the bird’s kinetic energy?
Answer:what is the problems
Explana:
1. Your big brother, despite warning, drops a penny off the observation
deck of the Empire State Building in New York City. The observation
deck is 381 m above the ground. What is the terminal velocity of the
penny? How far has the penny fallen after 3 seconds?
Answer:
The marble will take 8.813 seconds to hit the ground.
Explanation:
The marble will fall according to this motion equation: y(final) = y(initial) + v(initial)×t + 1/2×a×t×t
y(final)=0 m, the marble's final position in relation to the ground
y(initial)=381 m, the marble's initial position in relation to the ground
v(initial)=0 m/s (meters per second), the marble's initial velocity (speed with direction) when fall first begins
t=? seconds, this is the amount of time that passes while falling, the variable in this problem
a=-9.81 m/s/s, the rate at which the velocity of the marble changes, acceleration. On Earth, neglecting friction, acceleration is a constant at negative 9.81 meters per second squared
Plug the values into the equation: 0= 381 + 0t + 1/2(-9.81)(t)(t)
Subtract 381 from both sides and disregard 0t because it has no value and no longer matters: -381= 1/2(-9.81)(t)(t)
Multiply out the equation: -381= -4.905(t)(t)
Divide both sides by -4.905 to isolate the variable: 77.676=(t)(t)
Find the square root of both sides: t=8.813 seconds
An example of the law of gravity being applied is
Basketball dropping
Bike going off a jump
A diver pushing off a diving board
A flying disc being passed between two people
When a projectile reaches the highest point the vertical component of the acceleration is:
(A) Less than g (B) Greater than g (C) Positive g (D) Negative g
Answer:
The acceleration is g.
Taking the upward direction as positive
V = Vy y - 1/2 g t^2
Taking the downward direction as positive
V = -V y + 1/2 g t^2
One can choose either direction as positive, but the acceleration is
the same as g (it is g) while the projectile is in the air.
When a projectile reaches the highest point the vertical component of the acceleration is negative g (acceleration due to gravity). Thus, the correct option is D.
What is Projectile motion?Projectile motion is the motion of an object which is thrown or projected high into the air. After the initial force applied on the object that launches the object, the object only experiences the gravitational force. The object is called a projectile and the path of the object is called trajectory.
When a projectile reaches the highest point the vertical component of the acceleration is negative g (acceleration due to gravity). When the object achieves highest point, then the vertical acceleration of a projectile is zero meter per second square when it is at the peak of its trajectory motion.
Therefore, the correct option is D.
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how can a calculated height be greater than an actual height?
Answer:
mesuring heigh and weight is important
i tried but i don’t understand! please help asap!!!
Answer:
~218 electrons
Explanation:
(-3.5 * 10^-17 C)/(-1.602 * 10^-19 C) = 3.5/1.602x10^-2 = 218.47...
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Which of the following types of stars had the smallest initial mass?
Blue main sequence
Neutron star
Red supergiant
White dwarf
Answer:
the answer is White dwarf
Explanation:
The neurotransmitter acetylcholine:
A. is chemically identical to heroin.
B. is found in all sensory neurons.
C. can cause hallucinations when present in abnormally excessive amounts.
D. is involved in muscle contractions and memory.
Explanation:
A. is chemically identical to heroin.
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person’s eyes and the building is 85.5 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 38.9o with the horizontal. In part b the person is looking at the top of the antenna, and his line of sight makes an angle of 41.6o with the horizontal. How tall is the antenna?
Please solve step by step
Answer:
F = 1 N
Explanation:
F = Gm₁m₂/r² + kq₁q₂/r²
F = (Gm₁m₂ + kq₁q₂) / r²
F = [6.674(10⁻¹¹)(0.50)(0.25) + 8.988(10⁹(5(10⁻⁶))(-2(10⁻⁶))] / 0.30²
F = 0.9986666667593611111...
F = 1 N
notice that the electrostatic force by itself results in an attraction of
0.99866666666666666666... N
The gravitational force is quite negligible in this example.
Which type of color is most associated with emotions and attributes such as
calmness, sadness, and stillness? Choose the answer.
neutral
dynamic
warm
cool
The colors that are most associated with emotions and attributes such as calmness, sadness, and stillness are cool colors, therefore the correct answer is option D.
What is science?Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.
A method of learning about the world is science. Science allows people to participate in the creation of new knowledge as well as use that knowledge to further their goals. It is both a process, a product, and an institution.
Thus, the colors that are most associated with emotions and attributes such as calmness, sadness, and stillness are cool colors, therefore the correct answer is option D.
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A school bus moves at speed of 35 mi/hr for 20 miles. How long will it take the bus to get to school
Answer:
Explanation:
Assuming school is at the end of the 20 mile route, then
20 mi / 35 mi/hr = 0.57142...hr
which is about 34 minutes 17 seconds
In terms of energy transfer, how is a rise in
temperature different from a drop in
temperature?
Answer:
Let's look deeper into it.
Explanation:
Heat energy corresponds to the transfer of thermal energy between two given objects. Temperature itself gives off the measurement of how much thermal energy any given object has.
The higher the measurement, the more heat there is. The lower the measurement, the less heat there is.
HELP PLEASEE !!!! HELP FAST
Answer:
I'd say 2) "Genes are instructions that cells use to create proteins." Because it's more specific, and that's essentially what it's for.
Answer:
2.
Explanation:
because genes don't create proteins. proteins come from what we take as food.
Draw a free body diagram of an 6.4 kg ball falling towards earth. Calculate the weight of the ball.
Diagram:-
[tex]\setlength{\unitlength}{2mm}\begin{picture}(0,0)\thicklines\put(3,6){\circle{3}}\put(2.9,4.5){\vector(0,-3){2cm}}\put(-3.9,-10){\line(3,0){3cm}}\multiput(-3.5,-10)(0.8,0){18}{\line(1,-2){2mm}}\put(-3.7,0){$\sf\footnotesize 9.8 ms^{-2}$}\put(6,0){\vector(0,3){1.2cm}}\put(5.5,6){\line(3,0){2mm}}\put(5,-1.2){\sf\footnotesize height}\put(6,-2){\vector(0,-3){1.2cm}}\put(5.5,-8){\line(1,0){2mm}}\end{picture}[/tex]
Here
m=6.4kg[tex]\\ \sf\longmapsto Weight=mg[/tex]
[tex]\\ \sf\longmapsto Weight=6.4(9.8)[/tex]
[tex]\\ \sf\longmapsto weight=62.72N[/tex]
Submit a hand-drawn picture by you of the following.
"Humpty Dumpty sat on a wall, Humpty Dumpty had a great fall, and all the king's horses and all the king's
men couldn't put Humpty Dumpty back together again."
Please help, thanks.
A car parked on level pavement exerts a force of 10,000 newtons on the ground. What force does the pavement exert back on the car?
(F = ma, g = 9.81 m/s2)
A.2,500 newtons
B.10,000 newtons
C.10,000 kilograms
D.0 newtons
Answer:
B.
Explanation:
When equal forces are exerted onto eachother, they are exerting equal pressure since they are stationary.
The muscular system consists of exclusively this kind of tissue.
Answer:B
Explanation:
Each muscle or organ is composed of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. Thus, the muscular system consists of all types of tissue.
What is the muscular system?The Muscle fibers are specialized cells that make up the muscular system. Its ability to contract is its main characteristic. Muscles that are attached to bones, internal organs, or blood arteries are what move things. Muscle contraction is the primary cause of almost all bodily movement. A skeletal muscle on its whole is a part of the muscular system.
Muscle cells, also known as muscle fibers or monocytes (mostly in skeletal and cardiac muscle), make up the majority of the organs that make up muscles (mainly in smooth muscle).
By contracting and pushing food to the small intestine through a process known as peristalsis, the muscles surrounding the stomach aid in the flow of food through the digestive system.
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Một chất điểm dao động điều hoà theo phương trình x = 5cos(2πt)cm, chu kì dao động của chất
điểm là
A. 1s. B. 2s. C. 0,5s. D. 10s.
Answer:
D. is the answer trust me:))))
please help ASAP! I will give brainiest
Highlight the either increasing or decreasing to complete the sentence to demonstrate the relationship between the variables and the reaction rate.
(Increasing/Decreasing) the temperature, increases the reaction rate. (Increasing/Decreasing) the surface area, increases the reaction rate. (Increasing/Decreasing) the concentration, increases the reaction rate.
Answer:
1. Increasing
2. Decreasing
3. Increasing
Explanation:
Two skaters face one another and stand motionless, then push against each other on the ice. If one's mass is 55 kg and he moves to the left after the push at a velocity of 4.3 m/s, how fast was the other skater traveling after the push if her mass was 48 kg.
Answer:
3.75 m/s
Explanation:
55/4.3 = 48/x
12.8 = 48/x
x = 48 : 12.8
x = 3.75 m/s
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CAN YOU BRAINLEST ME PLEASE
A particle at the origin is experiencing three forces. The first one has a magnitude of 57 lb and is directed towards (2,-4,5), while the second one has a magnitude of 32 lb and is directed towards (-1,-2,-8). If the net force is 41 lb in the direction of (-5,-1,4), what is the x-component of the third force acting on the particle (in lb)?
The x-component of the third force acting on the particle is 41.2 lb.
The given parameters;
(2, -4, 5) = 57 lb(-1, -2, -8) = 32 lb(-5, -1, 4) = 41 lbThe vector components of the forces is calculated as;
[tex]F_1 = 57, (2,-4, 5) = 57\times \frac{2i -4j+ 5k}{\sqrt{2^2 + 4^2 + 5^2} } = 8.5(2i -4j+ 5k)\\\\F_1 = (17 i -34j + 42.5k)lb\\\\\\ F_2 = 32, (-1, -2, -8) = 32\times \frac{-i -2j-8k}{\sqrt{1^2 + 2^2 + 8^2} } = 8.3(-i-2j-8k)\\\\ F_2 = (-8.3i - 16.6j - 66.4k)lb\\\\\\ F_{net}= 41, (-5, -1, 4) = 41\times \frac{-5i -j+ 4k}{\sqrt{5^2 + 1^2 + 4^2} } = 6.5(-5i-j+ 4k)\\\\ F_{net} = (-32.5i -6.5j+ 24k)lb[/tex]
The x-component of the third force is calculated from the resultant of the forces;
[tex]F_1+F_2 + F_3 = F_{net}\\\\F_3 = F_{net} - (F_1 + F_2)\\\\F_3 = (-32.5i -6.5j + 24k) - (17i -34j + 42.5k) - (-8.3i -16.6j -66.4k)\\\\F_3 = (-32.5 -17 + 8.3)i +(-6.5 + 34+ 16.6)j + (24 -42.5+66.4)k\\\\F_3=(-41.2 i) +(44.1)j + (47.9)k\\\\F_3 = (-41.2i + 44.1 j + 47.9k)lb[/tex]
Thus, the x-component of the third force acting on the particle is 41.2 lb.
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A sphere of radius r =34.5 cm and mass m = 1.80 kg starts from rest and rolls without slipping down a 30.0∘ incline that is 10.0 m long.
A.) calculate its translational speed when it reaches the bottom.
B.) Calculate its rotational speed when it reaches the bottom.
C.) what is the ratio of translational to rotational kinetic energy at the bottom?
Answer:
Explanation:
It depends on the construction of the sphere.
Let's ASSUME it is uniform construction with a moment of inertia (2/5)mR²
The Change in potential energy will equal the change in kinetic energy
mgh = ½mv² + ½Iω²
mgh = ½mv² + ½((2/5)mR²)(v/R)²
2gh = v² + 2/5v²
2gh = 7/5v²
v = √((10/7)gh)
v = √((10/7)(9.81)(10.0sin30.0))
A) v = 8.37 m/s
B) ω = 8.37/0.345 = 24.3 radians/s
C) ½mv² / ½Iω² = mv²/Iω² = mv²/((2/5)mR²)(v/R)² = 5/2
types of circulatiom
PLEASE HELP ME RIGHT AWAY, ITS DUE NOW PLEASE HELP ME!!!!!!!
Answer:
B
Explanation:
0= no movement
Answer:
Explanation:A
Which landform is the farthest north?