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if you dive underwater, you notice an uncomfortable presure on your eardrum due to the increased pressure. the human endrum has a pressure of 70mm2 (7.10^-5 m2) and it can sustain a force of 7N without rupturing. if your body had no means of balancing the extra pressure, what would be the maximum depth you could dive without rupturing the eardrum?

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A message signal of frequency 10 kHz and peak voltage of 10 volt is used to modulate a carrier of frequency 106 Hz and peak voltage 20 volt. Then depth of modulation is :-

(1) 0.25 (2) 0.5 (3) 1 (4) 2

Answered! |

When a 2 kg mass is hung from a vertically suppported spiral spring, it stretches the spring by 10 cm. What mass must be hung on the spring if its to oscillate with a period of 1 s?

a. 4.96 kg

b. 3.47 kg

c. 1.76 kg

d. 5.44 kg

Answered! |

Three coplanar vectors are expressed, with respect to a certain rectangular coordinate sysytem as

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,

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,

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, in which the components of these vectors are given in arbitrary units. Find the vector

r⃗

which is the sum of these vectors.

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with magnitude

5√

at

3o

to the x-axis

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with magnitude

5√

at

297o

to the x-axis

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with magnitude

5√

at

297o

to the x-axis

Missing argument for superscript

with magnitude

5√

at

73o

to the x-axis

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In an experiment to determine the effective mass of a spiral spring, which of the following is not required in the set of apparatus?

a. spiral spring

b. stop watch

c. slot weights

d. pendulum bob

Answered! |

Which of these is NOT true about the graph of $T^{2} against h in an experiment to determine an inacessible height H using the simple pendulum?

a. the slope of the graph is negative

b. the intercept on the horizontal axis is positive

c. the value of g is obtainable from the slope of the graph

d. the intercept on the vertical axis is negative

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In a simple pendulum experiment to determine inaccessible height, $T^{2}/s^{2} was plotted on the vertical axis and h/cm on the horizontal axis. T is the period and h is the height of the pendulum bob from the floor. Which of the following gives the inacessible height H?

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An object is placed at a distance of 15cm from the following mirrors of focal length 10cm.Find the position and nature of image.a)concave b)covex

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The slope of the graph of T2 plotted on the vertical axis againnst l on the horizontal axis is used to determine the value of -----------

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Determine the error in the measurement of sine of 3005o

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