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A 140 kg rocket is moving radially outward from the earth at an altitude of 240 km above the surface with a velocity of 3.6 km/sec. At this point, its final stage engine shuts off.
Ignoring any minor air resistance, what is the rocket's velocity 900 km above the surface of the earth?";
Again ignoring any minor air resistance, what is the rocket's velocity 900 km above the surface of the earth if its mass were 280 kg?
What is the maximum height of the rocket above the earth's surface (using the initial rocket mass of $)?
A body is suspended vertically from an ideal spring of spring constant 3.1 N/m. The spring is initially in its relaxed position. What is the maximum kinetic energy of the body
The pulley system in Figure below is used to lift a 52-kg crate. Note that a chain connects the upper pulley to the ceiling, determine the tension in each chain
A mass m1 = 3.9 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 5.7 kg which hangs freely from the string. How much work is done by gravity on the two block system
A proton is bent into a circular path of radius 4 meter by a magnetic field of 0.3 T. The momentum of the proton is 360 MeV/c. Determine what is its kinetic energy
A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.50 mm. what is the actual diameter of the red blood cell
A block of wood has a mass of 3.87 kg and a density of 584 kg/m3. It is to be loaded with lead so that it will float in water with 0.84 of its volume immersed. What mass of lead is needed if the lead is on top of the wood
Two point charges of 2 C and –3 C are separated by 6 cm. Is the force attractive or repulsive? Describe. What is the magnitude of the electrostatic force among them?
A converging lens of focal length 20 cm is used to form a real image 1.0 m away from the lens. How far from the lens is the object
A man drags a 76-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 25° above the horizontal, and the strap is inclined 61° above the horizontal.
A cosmic ray interacts for a mere 11fs with its detector. Having just learned about the uncertainty principle, Find the minimum uncertainty in that energy
A current-carrying 2.0 cm long segment of wire is inside a long solenoid (radius=4.0cm, 800 turns/m, current = 50mA). what is the magnitude of the magnetic force on this segment
A uniform electric field exists in the region between two oppositely charged parallel plates 1.67cm apart. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the conflicting plate in a time int..
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