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At a distance of 4,000 ft from the launch site, a spectator is observing a rocket being launched. If the rocket lifts off vertically and is rising at a speed of 600 ft/sec when it is at an altitude of 3,000 ft, how fast is the distance between the rocket and the spectator changing at that instant?Solution) Distance=s=√(40002+h2), rate of change of distance=ds/dt=(ds/dh)(dh/dt)=(d(√(40002+h2)/dh)(dh/dt),dh/dt=600 ft/sec
calculate the acceleratio due to gravity on planet mercury if mass = 2.99 x 10 9to the power 23)kg and radius = 2.42 x 10( to the power 6) metres.
what is electrostatic shielding
in compton effect explain the presence of unmodified radiation
Given below are two electric circuits A and B Measure the ratio of power factor of the circuit B to the power factor of circuit A.
A 100V battery is linked across a resistor and causes a current of 5mA to ?ow. Verify the resistance of the resistor. If the voltage is now decreased to 25V, what will be t
what is meant by cryotron?
Hexane is throttled from 18.15 bar, 507.6 K to 0.1 bar. Determine the temperature at the exit and the entropy generation. Steam is cooled under constant pressure from 400 o C,
what is reduce mass in two mass system?
torque
The current in an RL circuit builds up one-third of its steady value in 4.56s. Find the inductive time constant.
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