A 0.10 g flea, having leapt from the surface of a dog’s cranium, is observed to be moving at 1.25 m/s when it is 5.00 cm above the position from which it leapt. What was the elastic potential energy stored in its legs before its leap

Answers

Answer 1

Answer:

E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ

Explanation:

From Law of Conservation Energy, we know that:

Elastic Potential Energy Stored = Gain in Kinetic Energy + Gain in Gravitational Potential Energy

E.P.E = (1/2)mv² + mgh

where,

E.P.E = Elastic Potential Energy = ?

m = mass of flea = 0.1 g = 1 x 10⁻⁴ kg

v = speed = 1.25 m/s

g = 9.8 m/s²

h = height = 5 cm = 0.05 m

Therefore,

E.P.E = (1/2)(1 x 10⁻⁴ kg)(1.25 m/s)² + (1 x 10⁻⁴ kg)(9.8 m/s²)(0.05 m)

E.P.E = 0.78 x 10⁻⁴ J + 0.49 x 10⁻⁴ J

E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ


Related Questions

Check how you understand the principles of working of lenses. In some optical setup consisting of a single lens and an object magnification factor is measured as m-+4. We can conclude that:__________ a. Lens is converging, image is at the opposite side of lens from the object b. Lens is converging, image is the same side of lens as object c. Lens is diverging, image is at the opposite side of lens from the object d. Lens is diverging, image is the same side of lens as object

Answers

Answer:

b. Lens is converging, image is the same side of lens as object

Explanation:

A single converging lens is often used as a magnifying glass. The reason, behind its use as a magnifying glass is the configuration of the converging lens, when an object is placed inside its focal length. It forms the image of that object as magnified and at the same side as the object. So, the image is both magnified and erect. In this way, the converging lens serves as a magnifying glass with certain magnification factor, single handedly. The ray diagram of a magnifying glass is attached for reference. So, the correct option is:

b. Lens is converging, image is the same side of lens as object

30.6*X+-2.56
Pls help

Answers

Answer:  10.16

Explanation:

What happens in a convection current?

Answers

Answer:

Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.

Explanation:

An airplane takes off northwest from Dallas to Amarillo. This is an example of-

a. Speed
b. Velocity
c. Acceleration

Answers

Answer:

the answers is C. acceleration

In the picture below, sphere X swings down and collides with sphere Y. Identify the action and reaction forces. 

Action force: 
Reaction force: 

Answers

Answer:

Action force is force acting in one direction. Reaction force is force acting in the opposite direction.

A nail driven into a board increases in temperature.
If 59.0 % of the kinetic energy delivered by a 1.60 kg hammer with a speed of 7.70 m/s is transformed into heat that flows into the nail and does not flow out, what is the increase in temperature of an 7.60 g aluminum nail after it is struck 10 times?

Answers

Answer:

ΔT = 40.91 °C

Explanation:

First we find the kinetic energy of one hit to the nail:

K.E = (1/2)mv²

where,

K.E = Kinetic energy = ?

m = mass of hammer = 1.6 kg

v = speed of hammer = 7.7 m/s

Therefore,

K.E = (1/2)(1.6 kg)(7.7 m/s)²

K.E = 47.432 J

Now, for 10 hits:

K.E = (10)(47.432 J)

K.E = 474.32 J

Now, we calculate the heat energy transferred (Q) to the nail. As, it is the 59% of K.E. Therefore,

Q = (0.59)K.E

Q = (0.59)(474.32 J)

Q = 279.84 J

The change in energy of nail is given as:

Q = mCΔT

where,

m = mass of nail = 7.6 g = 0.0076 kg

C = specific heat capacity of aluminum = 900 J/kg.°C

ΔT = Increase in temperature = ?

Therefore,

279.84 J = (0.0076 kg)(900 J/kg.°C)ΔT

ΔT = (279.84 J)/(6.84 J/°C)

ΔT = 40.91 °C

Whoever answers correctly gets brainlist!

Answers

Infared = used by police

gamma = short wavelength

radio = largest wavelength

visible = only ones we can see

Answer: police use infred waves,

radio waves have largest wave length, the

only part of the spectrum seen by humans is visible waves

gamma waves have shortest wave length

Explanation:

8.
'A 6.00 kg ball, A, moving at velocity 3.00 m/s due east collides with a 6.00 kg ball, B, at rest.
After the collision, A moves off at 40.0°N of E and ball B moves off at 50.0° S of E
please help me.​

Answers

Answer:

brrrrrakabrrrrrrrrra

Explanation:

an object with a mass of 7.5 kg accelerates 8.3 m/s2 when an unknown force is applied to it. what is the amount of the force?

Answers

Answer:

I believe the answer is 62.25 N

Explanation:

You just multiply 7.5 and 8.3 and you get 62.25

Answer:

62.25N or 62.25 newtons

Explanation:

F=ma where F is the force in newtons, m is the mass in kilograms (kg), and a is the acceleration

m=7.5kg

a=8.3m/s^2

Therefore, F=ma=7.5*8.3=62.25N

The amount of force is 62.25N or 62.25 newtons

what is the mass of an object with a density of 74 g/mL and a volume of 7 mL?

Answers

Answer:

518 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 74 × 7

We have the final answer as

518 g

Hope this helps you

A barrel of oil contains roughly 6.1x109 J. How many kW-hr is this? Answer in
units of kW-hr

Answers

Answer:

[tex]1.694*10^3KW/hr[/tex]

Explanation:

Formula:

[tex]KW/hr=E_{(change)}[/tex]

[tex]P=\frac{E}{t}[/tex]

[tex](KW)(s)=1000J[/tex]

[tex](3600)(KW)(s)=3600*1000J[/tex]

[tex]KW=3.6*10^6[/tex]

[tex]\frac{6.1*10^9}{3.6*10^6}=\frac{x}{1KW}[/tex]

[tex]1.694*10^3KW/hr[/tex]

Hope it helps

On Earth, you can lift a 10 kg object. What is the mass of that object on the moon? Is mass independent from gravity?​

Answers

Explanation:

An object's weight depends on the pull of the gravitating object but the object's mass is independent of the gravity.

A torque of 0.97 N m is applied to a bicycle wheel of radius 35 cm and mass 0.75 kg. Assuming the wheel can be modelled as a hoop, find the angular acceleration of the wheel.

Answers

Answer:

11 rad/s^2 approx.

Explanation:

Given

torque,τ= 0.97N

radius r= 35cm to m= 0.35m

mass m= 0.75kg

Required

angular acceleration

First, we need the  moment of inertial of the wheel

I=mr^2

I=0.75*0.35^2

I=0.75*0.1225

I=0.09kgm^2

Secondly, the angular moment of inertial is expressed as

a=τ/I

a=0.97/0.09

a=10.77rads/s^2

a=11 rad/s^2 approx.

In the flowchart representation of the scientific method (the one that embraces the use of constructing models), what does one do immediately after making observations?

Answers

Answer:

The correct answer is - ask a question based on observation and then postulate a hypothesis.

Explanation:

The scientific method is the step by step process to find an answer to any scientific question with the help of scientific investigation or experiment. The steps that make an investigation successful are should be in the correct order. These steps are as follows:

*Make an Observation

*Ask a Question

*Do Background Research

*Form a Hypothesis

*Conduct an Experiment

*Analyze Results and Draw a Conclusion

*Report Your Results

A sphere has a mass of 8.5 kg and a radius of 10cm. How much work is it necessary to do on the ball to get it to a speed of 6.0m/s?

Answers

Answer:

153J

Explanation:

Step one:

given data

mass m= 8.5kg

radius r= 10cm in meters = 0.01m

velocity v= 6m/s

The work done will be the same as the energy possessed by the sphere at such speed

Required

the work one in Joules

we know that

KE=1/2mv^2

KE=1/2*8.5*6^2

KE= 1/2*8.5*36

KE=306/2

KE=153J

A group of big city tenants were upset about rising rent for their apartments, and decided to play a prank on the Building Manager. They went up to the top floor of the
building, which was 176.4 m above the sidewalk, and waited. They wanted to drop the balloon at just the right time, so they needed to make a quick calculation. How many
seconds before the Building Manager walks to the spot should they drop the balloon?

Answers

Answer:

  t = 6 s

Explanation:

This is a free fall exercise

          y = y₀ + v₀ t - ½ g t²

If the balloon is released its initial velocity is zero, when it reaches the floor its height is also zero, we substitute

         0 = y₀ + 0  - ½ g t2

         t = √(2yo / g)

let's calculate

         t = √ (2 176.4 / 9.8)

         t = 6 s

the balloon must be released 6 s before the person reaches the building

Abrir en Google Traductor  

Comentarios

A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?
109,375 J

765,625 J

218,750 J

87,750 J

Answers

Answer:

The prediction for its maximum potential energy is 109,375 J

Explanation:

Given;

mass of the coaster car, m = 350 kg

speed of the coaster car at the lowest point, v = 25 m/s

The coaster car will have maximum kinetic energy at the lowest point and based on law of conservation of mechanical energy, the maximum kinetic energy of the coaster car at the lowest point will be equal to maximum potential energy at the highest point.

[tex]K.E_{max} = P.E_{max}[/tex]

[tex]K.E_{max} = \frac{1}{2} mv^2\\\\K.E_{max} = \frac{1}{2} (350)(25)^2\\\\K.E_{max} =109,375 \ J[/tex]

[tex]Thus, P.E_{max} = 109,375 \ J[/tex]

Therefore, the prediction for its maximum potential energy is 109,375 J

A train slows from 44 m/s to 19 m/s in 9 seconds. What is the train's acceleration? Show your work.

Answers

Answer:

a = 2.77 [m/s²]

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f} =v_{o} -a*t[/tex]

where:

Vf = final velocity = 19 [m/s]

Vo = initial velocity = 44 [m/s]

a = acceleration [m/s²]

t = time = 9 [s]

Note: The negative sign in the above equation means that the train is decreasing its velocity.

19 = 44 - a*9

9*a = 44 -19

a = 2.77 [m/s²]

A segment of wire of total length 3.0 m carries a 15-A current and is formed into a semicircle. Determine the magnitude of the magnetic field at the center of the circle along which the wire is placed. a. 1.6 mu T b. 4.9 mu T c. 1.0 mu T d. 9.8 mu T e. 15 mu T

Answers

Answer:

c. 1.0 mu T

Explanation:

From, the ampere's  circuit law:

∫B.dl = μ₀ I

B.(2πr) = μ₀ I

where,

B = Magnetic Field = ?

r = radius of the circle = length of wire = 3 m

μ₀ = Permeability of free space = 4π x 10⁻⁷ Tm/A

I = Current = 15 A

Therefore,

B(2π)(3 m) = (4π x 10⁻⁷ Tm/A)(15 A)

B = 10 x 10⁻⁷ T

B = 1 x 10⁻⁶ T = 1 μT

Hence, the correct option is:

c. 1.0 mu T

Can power be negative in physics? I am doing a lab in which I run down the stairs as quickly as possible. They are 5.4m tall and my work is 5321.7 J. After calculating work, I got -5321.7 J. I am supposed to calculate my power used over 3 trials. The time for trial 1 was 4.69 and the seconds for trials 2 and 3 are 4.25. After calculating my power I got -1134.69 W and -1252.16 W. I am not sure if I got my power right. Is my power really negative or is my power positive?

Answers

Answer:

Yes.

Explanation:

A negative power would just represent a loss of power. So in your case it lost -1252.16 W

A roller coaster has a vertical loop with radius 29.5 m.What is the minimum speed of the roller coaster car can have at the top of the loop if the passengers do not lose contact with the seats?
A) 10.0 m/s
B) 14.0 m/s
C) 17.0 m/s
D) 19.0 m/s

Answers

Answer:the  Minimum speed , v of the roller coster = 17.0 m/s --c

Explanation:

According to Newton's First law  of Motion which state that all object will remain at rest unless an external force is applied on the body to act otherwise.

Therefore the   Force exerted/ acting  on the surface of  the roller coaster will be equal to 0,

Net Force = 0

Remember that , Force = mg = Mv ²/r = 0

 Net Force =mv ² / r - mg = 0

mv²/ r - mg = 0

(diving through by m)

v²/r -g = 0

v² = gr

v= [tex]\sqrt{gr}[/tex]

where g, acceleration due to gravity= 9.8m/s2 and radius, r = 29.5m

v=  [tex]\sqrt{9.8m/s2 X 29.5m }[/tex]

v =[tex]\sqrt{ 289}[/tex]

v=  17.0 m/s

Therefore, the  Minimum speed , v of the roller coaster = 17.0 m/s

A projectile is fired horizontally off the top of a cliff with an initial velocity of 30 m/s. It hits the ground 2.0 seconds later. What is the height of the cliff?

Answers

Answer:no

Explanation:

What would the distance be if a bicyclist traveled 4.5 hours at a speed of 20.0km/h?

Answers

5.5 is the answer i think

The Doppler effect is the change in sound _____ caused by the motion of the sound source, motion of the listener, or both.
pitch
frequency
amplitude
speed

Answers

Frequency.
..........

A student walks 300 meters due east and then 100 meters due north,
then 500 meters due west. The total distance travelled by the student
-
is
meters.

Answers

Answer:

900 meter hhgffhffhhfcbjhggjdswexaazcgh

Answer:

900 meters

Explanation:

If you are talking about how many meters student walked then its 900 metes

But if you are talking about how many meters student travelled from the start point then its 200 meter

The mass of an empty flask is 49.74 g. Filled with 120 cm 3 of acetone, the mass of the flask is found to be 144.78 g. What is the density of acetone?

Answers

Answer:

0.79g/cm³

Explanation:

Given parameters:

Volume of acetone = 120cm³

Mass of empty flask  = 49.74g

Mass of flask + acetone  = 144.78g

Unknown:

Density of acetone = ?

Solution:

Density is the mass per given volume of a substance. It is mathematically expressed as;

   Density  = [tex]\frac{mass}{volume}[/tex]  

     Mass of acetone  =( mass of flask + acetone)   - mass of empty flask

     Mass of acetone = 144.78  - 49.74  = 95.04g

Now insert the parameters and solve;

 Density  = [tex]\frac{95.04}{120}[/tex]   = 0.79g/cm³

Nicki rides her bike at a constant speed for 6 km. That part of her ride takes her 1 h. She then rides her bike at a constant speed for another 9
km. That part of her trip takes her 2 h. What is her average speed?

Answers

Answer:

24km/h

Explanation:

go it right on ingenuity 2020

What is an atom's nucleus made of?
(2 points)
protons and electrons
protons only
protons and neutrons
neutrons only

Answers

Answer:

nucleus made of protons and neutrons because the chemical atom is determined my a number

A ball rolls to the right across a grassy field slowing down as it does so. Which of the following must be true?

Answers

Answer: i could prolly answer if it made more sense. which of the following where?

Answer:

D: the ball is not accelerating because it is slowing down

Explanation:

if the was no friction, then the ball would most likely pick up speed and never stop, like it would with it being on a hill covered in ice, it would pick up speed and never slow down (well, it would slow down, just at a point where it looks like it would never stop.

1. In a particular experiment to study the photoelectric effect, the frequency of the incident light and the temperature of the metal are held constant. Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, what happens if the intensity of the incident light is increased?A. The work function of the metal decreases. B. The number of electrons emitted from the metal per second increases. C. The maximum speed of the emitted electrons increases. D. The stopping potential increases.2. In another experiment, the intensity of the incident light and the temperature of the metal are held constant. Assuming that the initial light incident on the metal surface causes electrons to be ejected from the metal, what happens if the frequency of the incident light is increased? A. The work function of the metal increases. B. The number of electrons emitted from the metal per second increases. C. The maximum speed of the emitted electrons increases. D. The stopping potential increases.

Answers

Answer: 1. B. The number of electrons emitted from the metal per second increases.

2. The maximum speed of the emitted electrons increases.

The stopping potential increases

Explanation:

Photoelectric effect is simply referred to as the emission of electrons that occurs when there's an electromagnetic radiation. An example of such electromagnetic radiation is when material is being hit by light.

Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, the number of electrons emitted from the metal per second increases if the intensity of the incident light is increased.

Also, if the initial light incident on the metal surface causes electrons to be ejected from the metal, the maximum speed of the emitted electrons increases and the stopping potential increases.

Other Questions
Liam has a history of gang involvement and is facing charges on drug trafficking. When he was arrested, Liam was in the middle of a fight with one of his drug suppliers. He is known in the neighborhood to carry a weapon. When the judge decides that Liam will stand trial for his charges, what will she MOST likely do at this stage What was the purpose of the Preamble to the Constitution?A. to explain the colonists' reasons for separating from EnglandB. to overcome the threat posed by Shays RebellionC. to help the national government raise more revenueD. to identify the goals of the national government 1) Which of the following was not true of the Germanic tribes in Western Europe by 500:A) Their kingdoms replaced the provinces of the Roman Empire.B) They were mostly farmers and herdsmen.C) Their borders were constantly changing.D) They followed written laws.SaveNot Graded2) Which of the following was not a term used to refer to the era from 500 to 1500:A) The Age of FaithB) The Age of Trade and CommerceC) The Middle AgesD) The Dark AgesSaveNot Graded3) The constant wars among the Germanic tribes ruined trade and caused cities to decline.TrueFalseSaveNot Graded4) The Romance languages developed from which of the following:A) SpanishB) FrenchC) ItalianD) LatinSaveNot Graded5) The importance of learning and education increased in importance throughout Western Europe during the Middle Ages.TrueFalseSaveNot Graded6) When lords gave food, weapons and treasure to their fellow tribesmen, they expected service and loyalty in return.TrueFalseSaveNot Graded7) The relationship between the lords and their warriors encouraged political stability and orderly government.TrueFalseSaveNot Graded8) Which of the following was not true concerning monasteries:A) They supported schools and libraries.B) They were Christian communities.C) They housed women who wished to become nuns.D) They were responsible for preserving Romes intellectual heritage.SaveNot Graded9) Sections from all but which of the following were included in Charlemagnes empire:A) BritainB) GermanyC) FranceD) ItalySaveNot Graded10) How did Charlemagne respond to Pope Leos request for help when he was threatened by a group of lords?A) He refused to help the Pope.B) He offered to help the Pope escape to his kingdom.C) He paid the lords to retreat.D) He led his troops to Italy and defeated the lords.SaveNot Graded11) Charlemagne was determined to convert all of his subjects to Christianity.TrueFalseSaveNot Graded12) Although Charlemagne valued education, he did not learn to read or write.TrueFalseSaveNot Graded13) Charlemagne enlisted the help of powerful lords to control his kingdom but was careful to limit their authorityTrueFalseSaveNot GradedUse the passage quoted in the graphic to complete Questions 14 through 16.14) How did Einhard describe Charlemagnes overall appearance?A) Short and thickB) Laughing and merryC) Stately and dignifiedD) DisproportionateSaveNot Graded15) Einhard indicated that Charlemagnes height was seven times longer than his foot.TrueFalseSaveNot Graded16) Although he was large and robust, Charlemagne experienced a number of serious health issues throughout his life.TrueFalseSaveNot Graded17) The Treaty of Verdun accomplished which of the following:A) Split Charlemagnes empire among his heirs.B) Reunited the Holy Roman EmpireC) Increased the size of Charlemagnes empireD) Outlawed Christianity in Western EuropeSaveNot Graded18) The Magyars, Vikings and Muslims all threatened Western Europe in the era following Charlemagnes death.TrueFalseSaveNot Graded19) Viking ships traveled well on the ocean but were unable to navigate inland rivers.TrueFalseSaveNot Graded20) Even though the Vikings were often destructive, their presence benefitted Europe because they opened new trade routes and increased the exchange of technology.TrueFalseSaveNot GradedReview the names and terms listed in the word bank; then, answer Questions 21 through 30.21) Which of the following was the author of The Life of Charlemagne:A) EinhardB) PatrickC) CharlemagneSaveNot Graded22) Which of the following were tribesmen that attacked Roman Britain:A) FranksB) SaxonsC) CharlemagneSaveNot Graded23) Which of the following split the Holy Roman Empire into three parts:A) CharlemagneB) VikingsC) Treaty of VerdunSaveNot Graded24) Which of the following was a style of lettering used by monks who copied books:A) MonasteryB) Carolingian MinisculeC) EinhardSaveNot Graded25) Which of the following was a missionary who worked to convert Ireland to Christianity:A) CharlemagneB) PatrickC) Carolingian MinisculeSaveNot Graded26) Which of the following was the living quarters for monks and preserved much of Romes intellectual heritage:A) Carolingian MinisculeB) EinhardC) MonasterySaveNot Graded27) Which of the following were Germanic tribesmen that controlled Gaul after the fall of the Roman Empire in the West:A) FranksB) SaxonsC) VikingsSaveNot Graded28) Which of the following were Scandinavian warriors who plundered Western Europe in a series of destructive raids:A) SaxonsB) FranksC) VikingsSaveNot Graded29) Which of the following was crowned emperor on Christmas Day in 800:A) EinhardB) CharlemagneC) PatrickSaveNot Graded30) Which of the following was another name that some historians have applied to the Middle Ages:A) Dark AgesB) Treaty of VerdunC) Carolingian Miniscule Meds should be. And avalible for every product Using the diagram above, what is the measure of KPN? Complete the paragraph with the correct statements about the authors purpose.When reading, keep in mind that there can be more than one purpose for a work, but you should focus on the purpose. When it comes to autobiographies, a writers purpose is typically to make sense of events in their lives, communicate a personal statement, or . How did later chemists change Mendeleevs periodic table?A. They included physical properties such as melting point and density.B. They used atomic number instead of atomic mass to organize the elements.C. They used atomic mass instead of atomic number to organize the elements.D. They included chemical properties such as bonding power. Which ordered pair is the best estimate for the solution of thesystem of equations?y=3/2x+6y=1/4x-2 631 17/25 +32 3/10??? Which expression is equivalent to y^3-2y^2+y What is the difference between a body-cell and a sex-cell mutation in terms of inheritance? Stacey is making pancakes. She has 2 quarts of milk. The recipe calls for 12 fluid ounces of milk. How many ounces of milk will she have after making the pancakes? can some1 mark me az braaaainlllyieestt 2 good 2 be truee???? pls help What is one long-lasting climate change? Josie's Bagel Shop recently sold 3 poppy seed bagels and 3 other bagels. What is the experimental probability that the next bagel sold will be a poppy seed bagel? Simplify your answer and write it as a fraction or whole number, P(poppy seed bagel) Submit Can someone write a noticia its for spanish something that is happening now. And I can help you with your homework. Friend me to give email. How does the skin help regulate body temperature?HELP FAST Use the drop-down menu to answer the question.What is the best way to describe the luster of themineral shown in this image?(Sorry for the bad quality) answer please it is needed