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An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch effort, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The astronaut has a mass of 102 kg and the bag of tools has a mass of 16.0 kg. If the astronaut is moving away from the space station at 1.80 m/s initially, what is the minimum final speed of the bag of tools (with respect to the space station) that will keep the astronaut from drifting away forever?
a circular loop of wire of radius 12.1 cm is placed in a magnetic field directed perpendicular to the plane of the loop
A 6.9 cm diameter loop of wire is initiallyoriented perpendicular to a 1.4 T magnetic field. The loop is rotated so thatits plane is parallel to the field directionin 0.30 s.
Your television picture is created by 480 horizontal lines of pixels, arranged on a screen of total height h. Calculate this ratio D/h of minimum viewing distance to screen height
A block of wood with volume V floats in waterwith 0.67V submerged.In oil the block floats with 0.85V of its volume submerged. Find the density of the wood. Find the density of the oil.
The eyepiece of a refracting astronomical telescope (see the figure) has a focal length of 8.75 c. What is the angular magnification of the telescope
A beaker is filled to the brim with water. A solid object of mass 3.00 kg is lowered into the beaker so the object is fully submerged in the water, find the buoyant force that acts on the submerged object
A physics lecture room has a volume of 237 m3. For a gas pressure of 1.00 atm and a temperature of 26.0 oC, estimate the number of air molecules in the room
What percentage of the ball's initial energy is "lost"?
A transverse wave on a string is described by the equation y(x, t) = (2.12 cm) sin[(101 rad/s)t + (14 rad/s)x]. How fast does the wave move along the string
A converging lens (f1 = 26.0 cm) is placed 58.0 centimeter to the left of a diverging lens (f2 = -30.0 cm). Determine how far is the object from the converging lens
At t = 0, one toy car is set rolling on a straight track with initial position 15.5 cm, initial velocity -2.9 cm/s, and constant acceleration 2.10 cm/s2. What are their speeds at that time
A cube of ice is taken from the freezer at -8.4 and placed in a 104 aluminium calorimeter filled with 322 of water at room temperature of 20. The final situation is observed to be all water at 17.
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