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Action and reaction in polling forces
Secure two spring balances. Make a loop in every end of a short piece of strong cord. Join a spring balance to each end and have two pupils pull in opposite directions. Make a reading on every balance and compare them
A skydiver falls d1 = 495 meters in t1 = 22 s before opening his parachute. After the chute opens, he falls an additional d2 = 470 meters in t2 = 56.5 s. (a) Write an expression t
A 77.0-kg woman is walking 0.10 m/s east in the gym. A man throws a 15.0-kg ball south and accidentally hits the woman. The woman and the ball move together with a velocity
A longitudinal wave with a frequency of 34 Hz takes 1.0 s to travel the length of a 2.5 m Slinky (see the figure). Determine the wavelength of the wave. λ = ( )m
Explain fitting and fixture. In the industry, all terms are used indistinctly and frequently together. Several manufacturers describe fittings as the fixing elements, as connec
How is absorption occurred in fibre material? Absorption is associated to the fibre material. It is caused by three diverse mechanisms, which are: a. Absorption by atomic de
What are mass defect and binding energy? How is mass defect related to binding energy? Describe the term ‘decay constant' for a radioactive substance. Reduce the relation betwee
What is the Ohm Law? Ohm discovered that the amount of current was directly proportional to the voltage (more voltage gives more current) and inversely proportional to the resi
100 =6=4=9=7=9
Q. Define roentgen and activity and Curie? One roentgen (1R) is described as the quantity of radiation which produces 1.6 × 10 12 pairs of ions in 1 gram of air. The activi
How many sizes are there of lighting fiber optic? Literally hundreds, by some microns to over an inch into diameter, multicore and solid core, and square shaped ribbons, sheet
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