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Q1. What do superstring theories try to elucidate?
a. forces holding super clusters of galaxies together
b. behaviour of matter during the inflationary epoch
c. apparent acceleration of the expansion of the universe
d. behaviour of matter during the Planck time when all four fundamental forces were unified.
Q2. A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine?
How to find out the tension in the cable
Find out the change in entropy of the system
Find an average magnitude of the induced emf . A bungee jumper, who's mass is 79 kg, jumps from a tall building. After reaching his lowest point, he continues to oscillate up and down, reaching the low point two more times in 8.2 s.
What is the total displacement and the angle of displacement
What is amplitude of the electric component of the signal
How much time is necessary for the torso to come to rest
What is its velocity at impact? What will its average velocity be? What will its average speed be.
Find out the lengths of acceleration and deceleration phases
Find out an angle of the velocity vector
F ind the speed of the golf ball just after impact
A curve of radius 40 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely create the curve?
Analyse average density of the white dwarf
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