Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s , due to human reaction time at the start and stop moments.What is the percent uncertainty of a handtimed measurement of 6 s ? What is
49,230 results
Physics
a) The xcoordinate of an electron is measured with an uncertainty of 0.20 mm. What is the xcomponent of the electron’s velocity, vx, if the minimum percentage uncertainty in a simultaneous measurement of vx is 1.0%. b) Repeat part (a) for a proton.

Physics
A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0

Physics
Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s , due to human reaction time at the start and stop moments.What is the percent uncertainty of a handtimed measurement of 6 s ? What is the percent uncertainty of a

Physics
Some students want to calculate the work done by friction as an object with unknown mass moves along a straight line on a rough horizontal surface. The students have a force probe, a meterstick, and a stopwatch. Which of the following will allow the

physics
Each side of a metal cube is measured to be 2.0 cm ±0.20 cm. What is the absolute uncertainty in the calculated volume of the cube?

Physics
In a lecture demonstration , a 3.0 m long vertical string wuth ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. The string falls on a tin plate, and the class hears the clink of each bolt as it hits the plate.the

physics
The speed of the bullet (m = 50g) and the speed of an electron ( m = 9.1 * 1028g) are measured to be the same, namely 300 m/s, with an uncertainty of 0.01%. With what fundamental accuracy could we have located the position of each, if the position is

Electronics Engineering Technology
5) A microwave transmitter typically requires a +8dBm audio level to drive the input fully. If a +10dBm level is measured, what is the actual voltage level measured? Assume a 600Ω system.

chemistry
According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 108 m d)1.7 x 108 m e)None of the above

math
Lola needs to sign 96 invitations. Using a stopwatch that measures time to tenths of a second, it takes Lola 5.3 seconds to sign her full name. Going by the accuracy of the stopwatch, which is the most accurate determination for the number of seconds Lola

trig
A weight attached to a long spring is bouncing up and down. As it bounces, its distance from the floor varies periodically with time. You start a stopwatch. When the stopwatch reads 0.3 seconds, the weight reaches its first high point 65 cm above the

physics
To calculate the young modulus uncertainty do you add together the percentage uncertainty of strain and stress and if not then what do u do. Please dont send websites just tell and help me out.

Physics
Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s, due to human reaction time at the start and stop moments. What is the percent uncertainty of a handtimed measurement of (a) 5 s, (b) 50 s, (c) 5 min?

Calculus Please Check my answer
The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8hour time period. t02378 (hours)

physics
A car is speeding up and has an instantaneous speed of 14.0 m/s when a stopwatch reads 9.0 s. It has a constant acceleration of 2.3 m/s2 (b) What is the speed when the stopwatch reads 12.2 s?

physics
Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

Physics
Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2 J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

mathematics
The velocity(v)of a vehicle measured at intervals of time(t) were recorded as follows t(s) 0 2 4 6 8 10 12 v(m/s) 0 20 40 40 30 8 0 a) Represent this motion on a graph

Physics
A race car moves such that its position fits the relationship x=(5m/s) t + (.75m/s3 ) t3 where x is measured in meters and t in seconds. A)Plot a graph of position versus time. B)Determine the instantaneous velocity at t=4s using time intervals of .4s,

chemistry
6.2(+_ 0.2)  4.1 (+_ 0.1 ) + ? [6.2( +_ 0.2)  4.1(+_ 0.1)] : 9.43(+_0.05) find absolut uncertainty and relative uncertainty. PLEASE HELP:I solved them and got the exact absolute uncertainty like the answer key, but I didn't get right answer of relative

physics
A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and t in seconds. (a) Plot a graph of the car s position versus time. (b) Determine the instantaneous velocity of the car at t = 4.0

world history
Which statement best describes the period known as the Old Kingdom? A.) it was a time of dynastic uncertainty B.) it was a time of development C.) it was a time of great geographic expansion D.) it was a time of disunity My answer  A

algebra1
During on Alpine skiing event the times of four Scears were listed below time is measured in seconds skier a= 114.36 skier b=14.40 skier c=114.48 skierD =114.44 If the stopwatch used was only accurate to the 10th of a second which skiers time would be

Calc
The U.S. population is approximated by the function P(t) = 556 1 + 3.72e−0.5t where P(t) is measured in millions of people and t is measured in 30year intervals, with t = 0 corresponding to 1930. What is the expected population of the United States in

Physics
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy. In an experiment, v and y are measured and the measured values are used to calculate g. If the percent

asdfds
a car is speeding up and has an instantaneous velocity of 6.0 m/s in the x direction when a stopwatch reads 10.0 s. it has a constant acceleration of 1.5 m/s^2 in the x direction until the stopwatch 12.0 s. how far does it travel during this time interval?

chemistry
Density (d) is mass (m) divided by volume (V) (d = mV). Mass is typically measured in grams (g), while volume is typically measured in milliliters (mL). How much volume will 550 g of a solution with a density of 1.10 g/mL occupy?

chemistry
According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 108 m d)1.7 x 108 m e)None of the above

Chemistry
Heisenberg's uncertainty principle can be expressed mathematically as Δx*Δp = h/4π, where Δx and Δp denote the uncertainty in position and momentum respectively and h is Planck's constant. What would be the uncertaintry in the position of a neutron

help math
a partial moves along the xaxis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. the areas of the regions

physics
Seven students recorded values for acceleration due to gravity whose accepted value for acceleration due to gravity = 9.80665 m/s2 (to 6 s.f.). Their results are 9.81 m/s2 , 9.78 m/s2 , 9.65 m/s 2 , 9.87 m/s2 , 9.80 m/s2 , 9.81 m/s2 and 9.83 m/s2 .What is

Calculus
I am stuck on both of these questions. Would you please tell me if my reasoning is correct? 1. An object is dropped off a building. When comparing the average velocity of the object over equal time intervals, explain the difference between early time

physics
. A race car moves such that its position fits the relationship x = (5.0 m/s)t + (0.75 m/s3)t3 where x is measured in meters and in t in seconds. (a) Plot a graph of the car’s position versus time. (b) Determine the instantaneous velocity of the car at

World History
which statement best describes the period known as the old kingdom? a) it was a time dynastic uncertainty. b) it was a time of development. c) it was a time of great geographic expansion d) it was a time of disunity

Chemistry
Using Werner Hesienbergs uncertainty principle delta x >h/ (4pie*m*delta v) when mass of electron is 9.11x10^31kg what is the uncertainty in the position of an electron moving at 9x10^6 m/s with an uncertainty of delta v= 0.01x10^6m/s

scottsdale CC
Let s ct 3 , where c 1.0 m/s 3 . Compute the average speed over the time intervals t1 1.0 10 1 s, t2 1.0 10 2 s, and t3 1.0 10 3 s, with all time intervals starting at the time t 1.0000 s. What is the instantaneous speed at t 1.0000 s

Statistics
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956

Urgent Chemistry
The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{15}\; g) and is swimming at a velocity of vv =

physics
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy. In an experiment, v and y are measured and the measured values are used to calculate g. If the percent

Physics
I have to design an experiment to measure the speed of sound. We're given a tape measure and a stopwatch. The temperature of the air will be measured too. So I know you're probably not going to tell me (one of the ways) how to do it, but do you have any

physics
The periods of oscillaton were measured down to 0.38s. How could this be done with common laboratory timers? a given hint is : are the times exact values? I don't know how this would work b/c I've never heard of a timer or stopwatch thant can register a

Physics
Help me out! Thanks! You guys have really helped me before. Question 1 What does the law of inertia say about the velocity and acceleration of a body that is subject to no external influences? a) The velocity slows to zero as the object decelerates. b) The

Physics repost
I apologise for reposting this question but it is still not working out for me. I know that: speed of light c=3.0x10^8 Time interval delta t=0.19x10^9s The relationship between actual time and roudtrip distance is d=ct Also if there is and uncertainty of

Physics uncertainty
Eileen, Jackie, and Kathryn needed to find the difference between two angles A1 and A2, that they had drawn on a diagram: B = A1+A2 They then had to find the cosine of B. Jackie measured A1 to be 50° and A2 to be 3°. But their pencil was kind of dull, so

Physics
You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/ 3mm. The area would be A +/ a cm^2. a. What is A? b. What is a?

Science 3
Which statement about stellar motion is incorrect? A.In general, the closer a star is, the more its proper motion. B.The radical velocity is measured by the Doppler shift. C.The transverse velocity is measured by the proper motion and distance. D.Like

chemistry
Heisenberg's uncertainty principle can be expressed mathematically as Δx*Δp = h/4π, where Δx and Δp denote the uncertainty in position and momentum respectively and h is Planck's constant. What would be the uncertaintry in the position of a fly (mass

chemistry
Heisenberg's uncertainty principle can be expressed mathematically as Δx*Δp = h/4π, where Δx and Δp denote the uncertainty in position and momentum respectively and h is Planck's constant. What would be the uncertaintry in the position of a fly (mass

physics
A beam of electrons with momentum p=10^23 kg m/s passed through a narrow slit of width d=10^5 m. What is the uncertainty component of the momentum in the xdirection due to the uncertainty principle (approximately)? a. change in p greater or equal to

physics
in a lecture demonstration, a 3.0mlong vertical string with ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. the string falls on a tin plate, and the class hears the clink of each bolt as it hits the plate. the

physics modern
1. a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each. b) If a photon and an electron each have the same wavelength of 250 nm, find the energy of each. c) You want to study an organic molecule that is about 250

URGENT! Last calculus question!
Hey! So, I was wondering if someone could answer this. I am mad studying for my exam and I still have a few questions left that I just don't have time to answer, and the assignment is due tomorrow. Thanks and here is the question: Use calculus and

math
Sam emptied his coin bank and made a bar graph of the numbers of each type of coin the interval he was 5 coins If graph showed 5 intervals of quarters, 2 intervals of dimes,3 intervals if nickels and 10 intervals of pennies what was total amt of money in

chemistry
The speed of a certain proton is 4.5×10^5m/s. If the uncertainty in its momentum is to be reduced to 0.1%. Calculate the uncertainty in its position

Physics
d1 = 2.53 cm +/ .05 cm d2 = 1.753 m +/ .001 m 0 = 23.5 degrees +/ .5 degrees v1 = 1.55 m/s +/ .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. a = 4 v1^2 / d2

Science
what is an uncertainty? From reading the internet, is it a way to express potential error and that the actual value is between +/#? what would be the uncertainty for this: electronic balance measuring to the tenth of a gram? is it +/ 0.05?

Physics  Uncertainties
I have to do a lab with uncertainties, I have worked out that the uncertainty of the weight of Newton weights is (±0.48g)and the time uncertainty is (±0.0005s)but how do you find the uncertainty of acceleration? (using (v^2u^2)/ (2s) ) just

chemistry ap ...urgent! please help me!
The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a pH meter at 25.00 degrees C is given by the equation: E(measured)= E(ref) +.591pH where ref contains the potential of the reference electrode and all other

Physics question
Students decide to measure a projectile's range for an initial projectile angle of 45°. This angle has many advantages, not the least being that since the expression for the range is proportional to the sine of twice this angle, errors in determining the

Physics
Eileen, Jackie, and Kathryn needed to find the difference between two angles A1 and A2, that they had drawn on a diagram: B = A1+A2 They then had to find the cosine of B. Jackie measured A1 to be 50° and A2 to be 3°. But their pencil was kind of dull, so

Pre Calc
I do not see why I got two different equations for my answer A weight attached to the end of along spring is bounicng up and down. As it bounces, its distance from the floor varies sinusoidally with time. You start a stopwatch. When the stopwatch reads 0.3

Biology  Uncertainty
I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/ 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/ 4 beats/min. However, what I need to do now is

Biology  Uncertainty (Repost)
I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/ 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/ 4 beats/min. However, what I need to do now is

Physics
Suppose Fuzzy, a quantum mechanical duck, lives in a world in which h = 2π J.s. Fuzzy has a mass of 2.0 kg and is initially known to be within a region 1.0 m wide. a) What is the minimum uncertainty in his speed? b) Assuming this uncertainty in speed to

CHEMISTRY
What would be the uncertainty in velocity (miles/hr) of a neutron beam particle if the position can be measured within +/ 25 angstroms. The rest mass of a neutron = 1.67493 X 10^27 kg or 1.008664904(14) amu. I know you have to use the heisenberg

precalculus applications
How do I find the equation of a sinusoidal curve from just knowing the lowest point and highest point of it? For example: A weight attached to the end of a long spring is bouncing up and down. If we do not worry about friction, its distance from the floor

physics
An electron moves at 5 * 10^6 m/s. Predict the position of the electron within a 1% uncertainty (margin of error). Calculate the uncertainty, which is the worst possible speed (v), of the electron. Remember, based on Heisenberg's Uncertainty Principle,

Science
Students were studying how temperature affects water movement. The students added drops of food coloring to different temperatures of water.They measured the rates at which the food coloring spread throughout the water. Which tools would best help the

chemistry
According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 108 m d)1.7 x 108 m e)None of the above

PHYSICS
a=40.0 plusminus 0.1 cm (uncertainty) b=2.5 plusminus 0.05 cm (uncertainty) Find a/b and its uncertainty Is it 16cm plusminus 1cm of uncertainty or is it 16.0cm plusminus 0.4 cm of uncertainty

Physics
When discharging a capacitor it will a) loose half of its charge in equal time intervals b) loose a third of its charge in equal time intervals c) loose a quarter of its charge in equal time intervals d) gain half of its charge in equal time intervals I

physics
An ECG monitor must have an RC time constant less than 100 μs to be able to measure variations in voltage over small time intervals. If the resistance of the circuit (due mostly to that of the patient’s chest) is 1000 Ω, what is the maximum capacitance

Physics
Ok, my Physics professor gave us this to do uncertainty propagation with these equations. Can some please show me some examples on each of these so I know I'm doing them right? Uncertainty Propagation Since raw data includes uncertainty, all calculations

PHYSICS
A proton is confined to a nucleus whose diameter is 5.5*10^15m. If this distance is considered to be the uncertainty in the position of the proton, what is the minimum uncertainty in its momentum? I don't really get the uncertainty concept, and how can I

Physics
You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/ 3mm. The area would be A +/ a cm^2. a. What is A? b. What is a?

College Physics
If the uncertanty in the slope is 1.214×1014, is the measured value of ε0 within experimental uncertainty of the accepted value? (Yes or No)

Chemistry Labwork
The uncertainty in each measured value of K is about + 10%. Are all of your measured values of K within the range (+ 10%) of the average K value? My K values are 343, 342, 341, and 344. My average is 342. I used 3 significant digits. How do I answer this

Physics
A 70 g ball moves 45m/s. If its speed is measured to an accuracy of 0.10% what is the minimum uncertainty in its position?

Math (Trig)
In 1893, the city of Chicago put on a World's Fair to celebrate the 400th anniversary of Columbus' trip to the Americas. The most spectacular at this fair was a huge Ferris Week built by an engineer named George Ferris. This remarkable structure had a

Calc
a partial moves along the xaxis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. the areas of the regions

Science
Which statement about stellar motion is incorrect? A.In general, the closer a star is, the more its proper motion. B.The radical velocity is measured by the Doppler shift. C.The transverse velocity is measured by the proper motion and distance. D.Like

mat lit
with a partner, use a stopwatch or ordinary watch to time how long it takes you to run a specific distance, for example 100 m or around the school. If possible, run 100 m and then compare your time to the world record? What is the difference between your

Physics
A car is speeding up and has an instantaneous speed of 14.2 m/s when a stopwatch reads 9.1 s. It has a constant acceleration of 1.8 m/s^2. (a) What change in speed occurs between t = 9.1 s and t = 12.6 s? (b) What is the speed when the stopwatch reads 12.6

physics
In physics what are the dependent variables between 0 and 2 on a line graph? I must use the rounded number to mark off intervals along the axis. The intervals must be the same amount each time (count up by the same number).

Statistics
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956

Relative Uncertainty
As before, they make measurements to determine the initial speed. This time they find the initial speed to be 3.26 m/s with a relative uncertainty of 2.5% What is predicted range? I got that it's 108.444 What is the uncertainty in the predicted range? This

calculus 1
f(x) = 3x^3  9x + 5 find the: 1) zeroes or undefined values 2) intervals where the function is greater than zero 3) intervals where the function is less than zero 4) coordinates of all maxima and minima 5) intervals where the function is increasing 6)

physics
An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball

physics HELP!!
An object is moving along a straight line, and the uncertainty in its position is 2.40 m. (a) Find the minimum uncertainty in the momentum of the object. Find the minimum uncertainty in the object's velocity, assuming that the object is (b) a golf ball

physics
You measure a quantity, say A, and it has a 1% uncertainty. If you calculate the value of 100A, its uncertainty will be a. 100% b. 10% c. 1% d. Need more information since it depends on what A is.

KCC
An electron has a speed of 500 m/Sec with uncertainty of 0.002% what is the uncertainty in position?

Vocabulary
In modern hopitals, everything possible is done to prevent mistakes resultin from human (fallibility ,uncertainty) Answer  Uncertainty

Chemistry
How do you calculate the uncertainty of vitamin c in an unknown working solution without using the uncertainty eq?

Chemistry
An electron has a speed of 500m/s with uncertainty of 0.02% what is the uncertainty indicating it's position?

Chemistry
The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{15}\; g) and is swimming at a velocity of vv =

Chemistry
The Heisenberg Uncertainty Principle: A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of mm = 0.100fg\rm fg (where a femtogram, fg\rm fg, is 10−15g\rm 10^{15}\; g) and is swimming at a velocity of vv =

Physics please help!
An object is moving along a straight line and the uncertainty in its position is 1.1 m. (a) Find the minimum uncertainty in the momentum of the object. (b) Find the minimum uncertainty in the object's velocity, assuming that the object is a golf ball (mass

Physics
An astronaut has crash landed on a planet that little is known about (not even the acceleration due to gravity). She must descend a steeo cliff to find shelter, but wants to know how high the cliff is before making the attempts. She happens to have

Physics
d1 = 2.53 cm +/ .05 cm d2 = 1.753 m +/ .001 m 0 = 23.5 degrees +/ .5 degrees v1 = 1.55 m/s +/ .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. 1. d3 = 4 (d1 + d2)

Physics
d1 = 2.53 cm +/ .05 cm d2 = 1.753 m +/ .001 m 0 = 23.5 degrees +/ .5 degrees v1 = 1.55 m/s +/ .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. a = 4 v1^2 / d2