- Sum of clockwise moments = sum of anticlockwise moments.
40x = 32x 2.5
x=32 x 2.5/40 = 2.0m
lemass answered the question on January 21, 2019 at 08:25
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A screen is placed 80cm from an object. A lens is used to produce on the screen an image with a magnification of 3. What...
(Solved)
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Date posted:
January 21, 2019
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Answers (1)
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January 14, 2019
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December 30, 2018
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December 10, 2018
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State the reason why the speed of the water at the narrow section of a river is higher than at the wider section
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November 29, 2018
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Date posted:
November 13, 2018
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October 18, 2018
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October 18, 2018
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Date posted:
October 18, 2018
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Answers (1)
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Date posted:
October 18, 2018
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Date posted:
October 18, 2018
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(Solved)
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October 17, 2018
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A radioactive element has an initial count rate of 2,400 counts per minute on a scaler. The count rate falls to 300 units per minute...
(Solved)
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Date posted:
October 17, 2018
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Answers (1)
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The initial number of atoms in a sample is 5.12 × 1020. If the half-life of the sample is 3.0 seconds, determine the number of...
(Solved)
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Date posted:
October 17, 2018
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Answers (1)
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An isotope has a half-life of 576 hours. Complete the following table and show how mass varies with time from an initial mass of 1280...
(Solved)
An isotope has a half-life of 576 hours. Complete the following table and show how mass varies with time from an initial mass of 1280 g?
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Date posted:
October 17, 2018
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Answers (1)
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The half-life of a sample of a radioactive substance is 98 minutes. How long does it take for the activity of the sample to reduce...
(Solved)
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Date posted:
October 17, 2018
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Answers (1)
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(Solved)
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Date posted:
October 17, 2018
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Answers (1)
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(Solved)
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Date posted:
October 17, 2018
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(Solved)
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Date posted:
October 17, 2018
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Answers (1)
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Sodium has a work function of 2.0 e: Calculate (a) The maximum energy and velocity of the emitted electrons when sodium is Illuminated by...
(Solved)
Sodium has a work function of 2.0 e: Calculate
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(b) Determine the least frequency of radiation by which electrons are emitted. (Take ‘h’ = 6.626 × 10-34 Js, e = 1.6 × 10-19, c = 3.0 × 108 m/s and mass of electron = 9.1 × 10-31 kg).
Date posted:
October 17, 2018
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Answers (1)