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Q. A 0.47kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.03kg. What is the SG of wood?
Q. A plate carries a charge of -2.0 microcoulombs while a rod carries a charge of 2.5 microcoulombs. How many electrons should be transferred from the plate to the rod, so that both objects have the equal charge?
How to create a condition of weightlessness inside aircraft
explain how much charge is on each plate. What is the work done by the field on the electron.
A 40 g rifle bullet travelling 260 m/s buries itself in a 4.0 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.
A concrete highway is built of slabs 8.0 m long (20°C). How wide should expansion cracks between the slabs be (at 20°C) to prevent buckling if the range of temperature is -35°C to +45°C.
In the figure, suppose that the separation between speakers A and B is 5.90 m and the speakers are vibrating in phase. They are playing identical 110-Hz tones, and the speed of sound is 343 m/s.
Assume unpolarized light of intensity 197 W/m2 falls on the polarizer in the figure, and the angle in the drawing is 37.0°. What is the light intensity reaching the photocell?
If a metric ton is 1.000 x10^e3 kg, how many 74 kg people can safely occupy an elevator that can hold a maximum mass of accurately 1 metric ton.
Two speakers, one directly behind the other, are each generating a 374-Hz sound wave. What is the smallest parting distance between the speakers that will generate destructive interference at a listener standing in front of them? Take the speed of so..
find the potential difference across the capacitor. A conductor consists of a circular loop of radius R and two straight, long sections. The wire lies in the plane of the paper and carries a current I.
River Pascal with a volume flow rate of 3.3×10^5 joins with River Archimedes, that carries 1.09×106 , to form the Bernoulli River. The Bernoulli River is 120 wide and 20 deep.
What is frequency of the string
When blue light of wavelength 465 nm illuminates a diffraction grating, it produces a 1st order utmost but no 2nd order maximum.
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