Answer:
The power generated by the woman is 259 W
Explanation:
Given;
mass of the woman, m = 45.7 kg
initial velocity of the woman, u = 0
total height ascended by the woman, h = 2.54 m
time of the woman's motion, t = 5.0 s
final velocity of the woman, v = 2.63 m/s
acceleration due to gravity, g = 9.8 m/s²
The potential energy of the woman due to the height she ascended;
P.E = mgh
P.E = 45.7 x 9.8 x 2.54
P.E = 1137.564 J
The kinetic energy of the woman due to her final velocity;
K.E = ¹/₂mv²
K.E = ¹/₂ x 45.7 x (2.63)²
K.E = 158.051 J
The total mechanical energy of the woman at the top of the stairs;
M.E = P.E + K.E
M.E = 1137.564 J + 158.051 J
M.E = 1295.615 J
The power generated by the woman;
Power = Energy/time
Power = 1295.615 J / 5 s
Power = 259.123 W
Power = 259 W
help me besties ok thx
Answer:
[tex]1 \\ 0.5 \times 500 \times 20 \times 20 \\ \ 2 \\ 0.5 \times 0.6 \times 100 \times 100 \\ 3 \\ 1000 \times 0.5 \times 10 \times 10 \\ 1000 \times 0.5 \times 20 \times 20 \\ 1000 \times 0.5 \times 30 \times 30 \\ 4 \\ 0.5 \times 40000 \times 30 \times 30 \\ 5 \\ \sqrt{ \frac{2}{0.1 \times 0.5} } [/tex]
Match up the following set of words with their definitions.
1) a measure of the force of gravity on an object, expressed as mass of the object times acceleration due to gravity
2) the amount of matter an object is made up of measured in grams 3) a push or pull
4) a numerical quantity, expressed by standard unit/s of measure
5) a number (rate) with a direction; a quantity that has both magnitude (measurable amount) and direction
6) refers to the application of more than one force on an object and, therefore, the combined effect (sum of forces)
net force
mass
Vector
Force
Magnitude
weight
Answer:
weightmassforcemagnitudevector net forceHollywood studios get in trouble for a lack of diversity in their casting decisions. In order to remedy that, they create a computational model to find promising new actors. The computational model compares prospective actors to famous ones and chooses prospective actors that are the most similar to famous ones. What is a true statement about this computational model?
1. It will be effective and efficient at eliminating bias from casting decisions because computers are more objective than people.
2. Though it will choose from the applicants quicker than humans could, it will repeat the biases of the original casting decisions.
3. It is not a good idea to use computational models in the casting process as computers often deviate from the equations they're given. 4. While it would help eliminate bias from casting decisions, it is inefficient because it would be quicker for humans to choose the applicants.
Hollywood studios get in trouble for a lack of diversity in their casting decisions. The true statement about this computational model is that it will be effective and efficient at eliminating bais from casting.
Option 1 is correct.
The lack of diversity in Hollywood studios casting decisions results in the inability to select and choose the right actors for a specified role play.
The use of a computational model makes use of a computer program that studies and compares the prospective actors to famous ones and chooses prospective actors that are most similar to famous ones.
This is the best result to can be achieved and derived in making decisions in the diversity of casting because the computational model provides actors that are most effective and efficient thereby elimination the bias from casting decisions. This model is objective and it's not based on emotional decisions, unlike people.
Learn more about computational models here;
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A model of a plane in different parts of the atmosphere uses a scale of
1:2,000. If a plane flies at an altitude of 4,000 feet, how high above ground
level is the plane in the model?
A. 8 ft
B. 1/4,000 ft
C. 4ft
0
D. 2 ft
Which of the following types of stars is hottest?
A
B
C
D
Answer:
graph b
Explanation:
Why are there fewer elements than there are compounds?
Compounds are 2 or more elements that are combined together to form a new substance. Why are there are more compounds than elements? Because elements can combine with more than just one element, thus creating a whole series of combination possibilities.
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:))))
Which of the following is a true statement about computational models?
1. Computational models are more objective than humans, so computational models can be used to minimize bias.
2. Computers carry out the exact instructions you give them, whether they are the correct instructions or not.
3. Computational models, especially ones on computers with strong computational power, can fix errors in inputted equations.
4. Most computers have limits to computational power, with the exception of supercomputers.
The true statement about computational models is: 2. Computers carry out the exact instructions you give them, whether they are the correct instructions or not.
A computational model can be defined as the systematic use of computers to simulate real-complex systems, as well as studying them through the algorithmic or mechanistic use of various fields in science such as:
Mathematics.Computer science.Physics.A computer refers to an electronic device that is designed and developed to receive data (instructions) in raw form as an input, and then processes these data into an information (output) that is usable by an end user.
Generally, computers are designed to carry out the exact instructions an end user gives to them, whether those instructions are correct (right) or not (wrong).
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a ball thrown horizontally with the velocity of 20 m\s from a 20 m building .what is the time
Answer:2.02s
Explanation:
At the y component, the tract of the ball is free falling body. The initial velocity at y component is 0 m/s.
Height = 1/2 * g * t^2
20 = 1/2 * 9.8 * t^2
t = (20 * 2 / 9.8)^1/2, t = 2.02s
During a certain period of time, the speedometer of a car reads a constant
60 km/h. Does this indicate a constant speed? A constant velocity?
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 thin wall sphere with a moment of inertia (2/3)mR²
The Change in potential energy will equal the change in kinetic energy
mgh = ½mv² + ½Iω²
mgh = ½mv² + ½((2/3)mR²)(v/R)²
2gh = v² + 2/3v²
2gh = 5/3v²
v = √((6/5)gh)
v = √((6/5)(9.81)(10.0sin30.0))
A) v = 7.67 m/s
B) ω = 7.67/0.345 = 22.2 radians/s
C) ½mv² / ½Iω² = mv²/Iω² = mv²/((2/3)mR²)(v/R)² = 3/2
write two examples of chemical properties and explain what they are
A grand prix racing car has an average lap speed of 180km/h.Each lap is 4.5 km. How many laps will it complete in 1.5 hours
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Lap speed = 180 km/h
Each lap is about 4.5 km
So, number of laps it will complete in 1.5 hour :
[tex] \dfrac{180}{4.5} \times 1.5[/tex][tex] \dfrac{180}{3} [/tex][tex]60 \: \: laps[/tex]Question 5 (4 points)
Piedra Vista High School is 35 degrees north of east, 3.31 miles away from FHS. How many miles north and east is it? Round to the nearest
tenth of a mile.
North:
miles
East:
miles
Blank 1:
Blank 2:
Answer:
ayussssaasssassbfjdbskgsvdksbjabsdvsjvsjhjsjajbdnjsjnsnsnsnbfndksbsjjjsjdhjjsjjsjkjsjsjbdhsjabdhdhksbshsjsjisisisjdbbdjsjsjjebwnnwjbsnbhejshvjrebbdjndnebensjHELLONODNDIDBIDDBDUDBDIjsjsExplanation:
jshshjabsjbrnejdjdhjsndjdhfisjshsidsnsndgjsbdjdvsjsvdudhwjgdusbsuwgshidsbhsgsuydisksvdudh
I WILL GIVE YOU THE BRAINLEST ANSWER AND 100 POINTS
Choose two of the following technological devices. For each one, complete the required research and write about how the devices use wave behavior to transmit or capture information.
Microwave
Radio
Remote control
WiFi
X-ray
Gamma radiation
Device 1
Describe the device and its function.
What form of electromagnetic radiation does it use?
Describe the frequency and wavelength range of this type of electromagnetic wave.
Using the information above and details from your research, write a paragraph of five sentences or more explaining how the device uses the behavior and characteristics of the electromagnetic wave to function. Remember the writing tips from the lesson, and use facts and details to explain your topic sentence.
You must include citations for all reliable sources used. Include citations from three or more reliable sources.
Device 2
Describe the device and its function.
What form of electromagnetic radiation does it use?
Describe the frequency and wavelength range of this type of electromagnetic wave.
Using the information above and details from your research, write a paragraph of five sentences or more explaining how the device uses the behavior and characteristics of the electromagnetic wave to function. Remember the writing tips from the lesson, and use facts and details to explain your topic sentence.
You must include citations for all reliable sources used. Include citations from three or more reliable sources.
The way a microwave uses wave behavior to transmit information is for point-point communication for small-sized antennas.
The form of electromagnetic radiation it uses is electrical and mechanical energy.
What is a Microwave?This refers to the form of electromagnetic radiation that has a range of 1m-1mm.
The way a radio uses wave behavior to transmit information is for wireless transmission of sound, typically for maritime and aircraft travel.
The form of electromagnetic radiation it uses is a radio wave.r
The range of the radio is 100–10 km at 3–30 kHz
Read more about electromagnetic radiation here:
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#SPJ1
Answer:
.
Explanation:
plz help i will sure appreciate it
Please help, I need this in by today
Which statement describes how nuclear power generation systems work?
O A.
The heat for the electricity generation process comes from nuclear fusion.
ов.
Electricity is generated directly when two atoms split into smaller ones.
O C.
The heat for the electricity generation process comes from nuclear fission.
OD.
Electricity is generated directly when two atoms join together.
Answer:
c- heat for electricity generation process comes from nuclear fission
Explanation:
nuclear fission is splitting of atoms to release energy held at nucleus of atoms
A plane moves 599 m northeast along a runway.
If the northern component of this displacement
is 89 m, how large is the eastern component?
The eastern component of the plane's displacement is 592.35 m.
The given parameters;
the resultant of the plane displacement = 599 mthe northern component of this displacement, Y = 89 mLet the eastern component of this displacement = XThe eastern component of the plane's displacement is calculated by applying Pythagoras theorem as follows;
X² + Y² = 599²
X² + 89² = 599²
X² = 599² - 89²
X² = 350880
X = √350880
X = 592.35 m
Thus, the eastern component of the plane's displacement is 592.35 m
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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.
How strong is a neutron star's gravity.
Answer:
About a thousand billion times! Because neutron stars are so dense, they have intense gravitational and magnetic fields. The gravity of a neutron star is about a thousand billion times stronger than that of the Earth. Thus the surface of a neutron star is exceedingly smooth; gravity does not permit anything tall to exist.
It's crazy strong.
Un hamster fait tourner sa cage de 27cm de diamètre a raison de 14tours par minute .quel est le module de l accélération centripète d un morceau de nourriture collé sur la paroi extérieure de la cage ?
Answer:
Explanation:
a_c = ω²R
14 rev/min (2π rad/rev)(1 min/60 s) = 1.466 rad/s
a_c = 1.466²(0.27/2)
a_c = 0.29 m/s²
Le hamster est lent
An 80-kilogram skier slides on waxed skis along a horizontal surface of snow at constant velocity while pushing with his poles.
What is the horizontal force pushing him forward?
Answer:
Special Relativity/Newtonian Physics
Explanation:
Well in Newtonian physics you could say your mass is pushing you down and the floor is pushing you up. But rather in Special relativity only to floor is pushing up on you.
In this theory the word inertial observer matters and proves several matters throughout science. So exploring is a huge important thing to do. A person cleaning the window falls, while doing so the person feel weightless while falling. Objects that fall down with the person would remain stationarily, relative to the person. Similar to a person in space. Far away from any large masses the person would be an inertial observer. With no acceleration the person is also not close to gravitational fields and all laws of physics in the person's reference frame. The man falling off the roof is an inertial observer too. Because of this both of the matters about the rocket man and the person falling off the roof are the same.But you would think that the person falling off the roof is accelerating. But the equivalence principle tells us wrong.
The equivalence principle has made it easy to prove both people in the situations are inertial observers. People watching would think that he is accelerating, but he is not. But he is accelerating? The equivalence principle tells us to focus on the experience of the observer and the person feels weightless so they are an inertial observer. If a person in Space comes across a planet, the person's rocket will start heading towards a planet. But the Space person would be oblivious. The person would not feel any acceleration. The spaceship would not sense any acceleration nor would it sense that it is turning. A person outside the spaceship may see the slight curving motion and the person inside would not notice until the instant it crashes into the planet. Explaining this is geodesics and spacetime it equally links and connects with this in an obvious and common way.
Spacetime is a model that makes 4D, it joins space and time, ‘Space-time’. Now people can say how it perfectly describes gravity with it’s queer way of curving.
But how does this happen without gravity? Space is 4D with width, breadth, height and time. There is a model called spacetime. Einstein along with many other people visualise it as woven along with time. Space- time. It curves by mass distribution. The person is still traveling in a straight line. Just straight through spacetime. It is traveling along the geodesics of spacetime. This is actually quite common, it is just an object travelling straight on a curved surface. Like an airplane travels straight to get quicker to a different place. But it appears curved because obviously the Earth is curved. So if you unfolded the earth the path would be curved, but the plane is still traveling in a straight line. Let’s also say you and your friend were standing on the equator. You are 1000 kilometers apart from your friend. As you move towards the north direction you would eventually meet with your friend. You are not being pushed by gravity but simple as that you are just traveling on the geodesics of Earth. Matter tells spacetime how to curve, Spacetime tells matter how to move-John Wheeler.
The man falling off the roof was accelerating so what happens if the rocket man accelerates?
Now once the rocket man accelerates the floor accelerates into rocket man. Objects remain stationary but the floor also accelerates into the objects. The situation is just like on earth except you are not an inertial observer because you do not feel weightless. The observer inside the rocket would feel a force pushing up on the feet. Same on earth. You are accelerating in order to remain stationary. However you can not see yourself accelerating. In Newton’s rule the force of Gravity would be pushing you down and the ground pushing you up. However in special relativity gravity does not exist so it’s just the force of the ground pushing up on you. Just like the rocket accelerating. You look like you are not accelerating up but only in your frame of reference. To measure your speed of acceleration you must get an inertial observer to measure your acceleration speed. Like the man falling off the roof. Let’s say you are in the building and the man falls off the roof. To him you would appear accelerating upwards. So you have to accelerate just to stand still. Why all objects fall at the same rate is a mystery to Newtonian Physics but it is not a mystery to Special relativity because the objects are not accelerating just the floor accelerating into it.
So I hope you understand now, I think you know what I'm getting at. Might of misunderstood your question.
PLS HELP ME WITH THIS
Answer:
C
Explanation:
C
What four processes allow for the change of thermodynamics properties according to the first law
Answer:
The four types of thermodynamic process are isobaric, isochoric, isothermal and adiabatic.
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 kind of bond forms ions?
Answer:
Ionic bond
Explanation:
Hope it helps ya
Energy can be transformed from one form to another. The diagram shows one such process.
Which energy transformation is represented in the diagram?
nuclear to thermal and radiant
nuclear to electrical and chemical
chemical to nuclear and radiant
chemical to electrical and nuclear
Answer:
b
Explanation:
Answer
nuclear to electrical and chemical
Explanation:
Energy can be transformed from one form to another. The diagram shows one such process.
Which energy transformation is represented in the diagram?
nuclear to thermal and radiant
nuclear to electrical and chemical
chemical to nuclear and radiant
chemical to electrical and nuclear and it is ovisly b
drop down menu to complete the statement.
___ are made of amino
____ are used by all organisms to store the transmit genetic information
____ are used by organisms for tissue growth and repair
options are 1. proteins 2. nucleic acids
Answer:
The answer to the first question is protein
A student practicing for a cross country meet runs 250 m in 30 s. What is the average speed
Answer:8.3m/sec 30 sec,
Explanation:
A student practicing for a track meet, ran 250 m in 30 sec. a. What was her average speed? 250 m = 8.3 m/sec 30 sec.