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Imagine that you are on a space walk outside a vessel coasting
through interstellar space. You have launched a reference probe that is
perfectly stationary relative to the ship, equipped with precision laser
velocity-measuring devices. A meteoroid approaches at 4.0 m/s, strikes
the ship, and bounces off in exactly the opposite direction at 2.0 m/s.
you grab the meteoroid, take it into the ship, put it into an inertial mass
meter, and find out that it masses 1.0 kg. The ship’s mass is 20,000 kg
without you on board. You know that the impact has caused the space
ship to start moving relative to the probe in the same direction the
meteoroid was originally travelling. What will the probe indicate as the
magnitude of the ship’s post-collision velocity vector?
Suppose two lumps of clay approach each other from opposite
directions in deep space. Lump number 1 masses 4.00 kg and travels at
5.00 m/s. Lump number 2 masses 10.0 kg. When the lumps collide, no
material flies off. The lumps stick together , and the resulting object is
stationary relative to you, the observer. How fast was lump number 2
moving before the collision relative to you, the observer?
List all the forces that act on you while you are standing on the ground. Diagram/sketches the forces.
Calculate the permitted energies of an electron confined in a box 1Å wide?
Imagine that you are on a space walk outside a vessel coasting
through interstellar space. You have launched a reference probe that is
perfectly stationary relative to the ship, equipped with precision laser
velocity-measuring devices. A meteoroid approaches at 4.0 m/s, strikes
the ship, and bounces off in exactly the opposite direction at 2.0 m/s.
you grab the meteoroid, take it into the ship, put it into an inertial mass
meter, and find out that it masses 1.0 kg. The ship’s mass is 20,000 kg
without you on board. You know that the impact has caused the space
ship to start moving relative to the probe in the same direction the
meteoroid was originally travelling. What will the probe indicate as thmagnitude of the ship’s post-collision velocity vector?
Imagine that you are on interplanetary vessel coasting through a space to a rendezvous with Neptune. You discover that an immediate course correction is necessary. Otherwise the ship will not fall into orbit around Neptune, but will fly off into interstellar space! Your onboard computers indicate that the ship must gain 100.0m/s of forward speed to get back on course. Suppose the mass of the craft is exactly 2.0 x 10^4 kg. The rocket produce a constant force of 2.500 x 10^4 N.
A. When the rockets are fired, how fast will the ship accelerate?
B. How long will it take for the forward velocity of the ship to increase by the required 100.0m/s?
C. What will be the impulse that produces this course correction?
Consider the hydrogen atom in a magnetic field of strength 10 tesla. Calculate the energies (in Joule) of the possible 2p to 1s transitions. Value of β is 9.274*10^-24 J/T
An object is launched at a velocity of 20m/s in a direction making an angle of 25° in a 50 meter elevation. How long is the object in the air? What is the range of the object?
Explain briefly the limitation of the Bohr model of the hydrogen atom
A car starts from rest travels on a straight road and its wheel rotates 500 rotations in 15 s. If the diameter of a car’s wheel is 60 cm, calculate the distance traveled by the car.
