Home
Class 11
PHYSICS
There are atomic (Cesium) clocks capable...

There are atomic (Cesium) clocks capable of measuring time with an accuracy of 1 part in `10^(11)`. If two such clocks are operated to precision, then after running for 5000 years, these will record a difference of

A

`1` day

B

`1s`

C

`10^(11)s`

D

`1` year

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta t = 5000 xx (1)/(10^(11))` years rounded off to minimum significant figures.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise Single Option Questions|12 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise More than One Answer Questions|9 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise LEVEL-II (C.W)|28 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos

  • VECTORS

    NARAYNA|Exercise LEVEL-II (H.W)|14 Videos

Similar Questions

Explore conceptually related problems

If two celsium clocks differ only by 0.02 s in 200 yaers, what is the accuracy of cesium clock in measuring time intervals ?

Two atomic clocks are allowed to run for 100 years and they differ by 0.1s only. What will be the accuracy of standard atomic clock in measuring 1s?

Knowledge Check

  • The accuracy of a clock is one part in 10^(10) . The maximum difference between two such clocks operating for 10^(10) secounds is......

    A
    `1s`
    B
    `5s`
    C
    `10s`
    D
    `10^(10)s`

  • The Accuracy of a clock is one part in 10^(10) . The maximum difference between two such clocks operating for 10^(10) seconds is ___________

    A
    1s
    B
    5s
    C
    10s
    D
    `10^(10)s`

  • A german physicist gae a principle about the uncertainties in simultaneous measurement of position and momentum of small particles. According to that physicist. It is impossible to measure simultaneously the position and momentum of small particle with absolute accuracy or certainty. if an attempt is made to measure any one of these two quantities with higher accuracy, the other becomes less accurate. The produce of the uncertainty in position (Deltax) and uncertainty momentum (Delta p) is always constant and is equal to or greater than h//4pi , where h is Plancks constant i.e. (Deltax ) (Deltap) ge (h)/(4pi) The uncertainty in position of an electron (m = 9.1 xx 10^(-28)gm) moving with a velocity 3 xx 10^(4)cm//s accurate upto 0.001\% will be

    A
    `3.84 cm`
    B
    `1.92 cm`
    C
    `7.68 cm`
    D
    `5.76cm`

    • Similar Questions

    Explore conceptually related problems

    In October 1971 an atomic clock was placed on a "Boeing 747" flying at an altitude of 10 km at a velocity of 1000 km/h eastwards. An identical clock, with time-keeping accuracy of 1 ns (1 nanosecond = 10^(-9) ) remained on the Earth. The plane was in flight 60 h, after which a comparison was made of the clocks' readings. What was the difference in the readings of the clocks in the plane and on the Earth? What were the contributions of the plane's elevation and its speed of flight?

    1. Keep your watch accurate. For some people, moving up the time on their watch will help them get up earlier. For others, they will remember that the time on the watch is wrong and will disregard it altogether. It may be helpful to set your watch just two minutes ahead instead of five or ten. 2. Keep a clock, phone, computer or anything that displays time in each room of your house. One of the easiest ways to run late is simply by not realising that the time is passing as quickly as it is. 3. Set all your clocks and watches to the same time. Don't be an optimist. Things usually take longer than what you'd expect, even without major delays. If you have a dinner appointment at 7.30 p.m., don't think you can work till 7 p.m., then take a bath, dress and reach on time. Realistically, calculate the time you will take at each step and then add 10 minutes more to allow for unexpected delays, or you cannot get to your job in time. 4. Wake up when you are supposed to wake up. Don't hit the snooze button, keep on lying in bed, and watch TV at the very start of your day. May be try even setting your clock 10 minutes earlier than you need. If you have difficulty with this, move your alarm clock to somewhere away from your bed, that way, you have to get up to turn it off. Commit yourself to being 15 minutes early for everything. If you have to reach your place of work at 8.00, don't even tell yourself this. Just tell yourself (and everyone else who listens - but don't annoy them or make them think that they are late or early!) “I have to be at work at 7.45.” If you do this, you will be on time even with little unforeseen delays. You will be on time even with a traffic jam. On the basis of your reading of the above passage answer the question: We shall disregard the time displayed by our clock when we set it:

    1. Keep your watch accurate. For some people, moving up the time on their watch will help them get up earlier. For others, they will remember that the time on the watch is wrong and will disregard it altogether. It may be helpful to set your watch just two minutes ahead instead of five or ten. 2. Keep a clock, phone, computer or anything that displays time in each room of your house. One of the easiest ways to run late is simply by not realising that the time is passing as quickly as it is. 3. Set all your clocks and watches to the same time. Don't be an optimist. Things usually take longer than what you'd expect, even without major delays. If you have a dinner appointment at 7.30 p.m., don't think you can work till 7 p.m., then take a bath, dress and reach on time. Realistically, calculate the time you will take at each step and then add 10 minutes more to allow for unexpected delays, or you cannot get to your job in time. 4. Wake up when you are supposed to wake up. Don't hit the snooze button, keep on lying in bed, and watch TV at the very start of your day. May be try even setting your clock 10 minutes earlier than you need. If you have difficulty with this, move your alarm clock to somewhere away from your bed, that way, you have to get up to turn it off. Commit yourself to being 15 minutes early for everything. If you have to reach your place of work at 8.00, don't even tell yourself this. Just tell yourself (and everyone else who listens - but don't annoy them or make them think that they are late or early!) “I have to be at work at 7.45.” If you do this, you will be on time even with little unforeseen delays. You will be on time even with a traffic jam. On the basis of your reading of the above passage answer the question: In order to reach our job in time:

    1. Keep your watch accurate. For some people, moving up the time on their watch will help them get up earlier. For others, they will remember that the time on the watch is wrong and will disregard it altogether. It may be helpful to set your watch just two minutes ahead instead of five or ten. 2. Keep a clock, phone, computer or anything that displays time in each room of your house. One of the easiest ways to run late is simply by not realising that the time is passing as quickly as it is. 3. Set all your clocks and watches to the same time. Don't be an optimist. Things usually take longer than what you'd expect, even without major delays. If you have a dinner appointment at 7.30 p.m., don't think you can work till 7 p.m., then take a bath, dress and reach on time. Realistically, calculate the time you will take at each step and then add 10 minutes more to allow for unexpected delays, or you cannot get to your job in time. 4. Wake up when you are supposed to wake up. Don't hit the snooze button, keep on lying in bed, and watch TV at the very start of your day. May be try even setting your clock 10 minutes earlier than you need. If you have difficulty with this, move your alarm clock to somewhere away from your bed, that way, you have to get up to turn it off. Commit yourself to being 15 minutes early for everything. If you have to reach your place of work at 8.00, don't even tell yourself this. Just tell yourself (and everyone else who listens - but don't annoy them or make them think that they are late or early!) “I have to be at work at 7.45.” If you do this, you will be on time even with little unforeseen delays. You will be on time even with a traffic jam. On the basis of your reading of the above passage answer the question: It is good to set our watch:

    1. Keep your watch accurate. For some people, moving up the time on their watch will help them get up earlier. For others, they will remember that the time on the watch is wrong and will disregard it altogether. It may be helpful to set your watch just two minutes ahead instead of five or ten. 2. Keep a clock, phone, computer or anything that displays time in each room of your house. One of the easiest ways to run late is simply by not realising that the time is passing as quickly as it is. 3. Set all your clocks and watches to the same time. Don't be an optimist. Things usually take longer than what you'd expect, even without major delays. If you have a dinner appointment at 7.30 p.m., don't think you can work till 7 p.m., then take a bath, dress and reach on time. Realistically, calculate the time you will take at each step and then add 10 minutes more to allow for unexpected delays, or you cannot get to your job in time. 4. Wake up when you are supposed to wake up. Don't hit the snooze button, keep on lying in bed, and watch TV at the very start of your day. May be try even setting your clock 10 minutes earlier than you need. If you have difficulty with this, move your alarm clock to somewhere away from your bed, that way, you have to get up to turn it off. Commit yourself to being 15 minutes early for everything. If you have to reach your place of work at 8.00, don't even tell yourself this. Just tell yourself (and everyone else who listens - but don't annoy them or make them think that they are late or early!) “I have to be at work at 7.45.” If you do this, you will be on time even with little unforeseen delays. You will be on time even with a traffic jam. On the basis of your reading of the above passage answer the question: We sometimes get late only because we think that:

    Home
    Profile