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1. A rocket has an upward acceleration a(t) =9.0t m/s^2 fpr the first 5 seconds of its flight, and thereafter, is in freefall.
What is the greatest height that the rocket achieves?
Assume that the initial position and velocity are both zero.
2. A particle leaves the origin with an initial velocity vi= 10i m/s. It undergoes a constant acceleration given by a= (2.0i - 1.0j) m/s^2.
a. How long does it take to reach a speed of 20 m/s at 13.7 degrees below the horizontal?
b. What is its distance from the origin when its speed reaches 20 m/s?
An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, with only electromagnetic radiation appearing after the collision. determine the energy of the electromagnetic radiation
Since it is well known that the Coulomb potential has a much simpler form in spherical polar coordinates, why did we begin our treatment of the one-electron atom in rectangular coordinates?
The three circuits below have driving Emf's with the same amplitude, 5 V. Each is driven at a fixed frequency which differs from the other two. The magnitudes of the inductive reactance in the left circuit, of the capacitive reactance in the cente..
Find the maximum charge if neoprene rubber is used between the plates instead of air
The gauge pressure in the pipe at the center of section A is 1.25 atm and the flow rate is 0.856 L/s. The vertical pipes are open to the air. Find the level (above the flow midline as shown) of the liquid-air interfaces in the two vertical pipes. ..
Every year, there is a foot race to the top of the Empire State Building. what was his average power output during the race
an olympic weightlifter snatches 100 kg. In a snatch the barbell is moved from a stationary position on the floor to a stationary poition over the athlete's head. determine the weightlifter's average power output
a 70.1 kg student is riding a looping roller coaster. at the top of the loop the student is moving with a speed of 17.5
A beam of electrons is incident on a barrier 5eV high and 1nm wide. Discover what energy the electron should have at .1% of them to get during the barrier.
What are the operational mechanism and design of the world''s most powerful laser, and what is its maximum radiant output in watts per square centimeter without the use of a lens?
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3781 kg), which is made of steel (? = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-p..
Determine the thermal efficiency of the bottoming cycle.- The ratio of the pump to turbine power.- The required mass flow rate of refrigerant.
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