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a uniform disk with a mass of 0767kg and radius 151cm is rotating on frictionless bearings with an angular speed of
an engine with an output of 2670 w has an efficiency of 390 it works at 900 cycless how much work is done in each
1 give at least 3 examples from the electromagnetic spectrum uses and dangers2 describe the three ways that electricity
a 210 g block is pressed against a spring of force constant 130 knm until the block compresses the spring 100 cm the
soft drinks are commonly sold in aluminum containersa to an order of magnitude how many such containers are thrown away
a coil of wire is connected to a galvanometer when a bar magnet is moved in and out of the coil the galvanometer
an iron nail is brought near a magnet which of these is not true the nail is ferromagnetic the nail becomes a north
a playground ride consits of a disk of mass m 47kg and radius r 16 m mounted on a low friction axle a child of mass m
an open plastic soda bottle with an opening diameter of 30 cm is placed on a table a uniform 195-t magnetic field
three moles of ideal gas are in a rigid cubical box with sides of length 0470m part a what is the force that the gas
animals in cold climates often depend on two layers of insulation a layer of body fat of thermal conductivity 0200wm
two rods one made of brass and the other made of copper are joined end to end the length of the brass section is 0290m
a hydraulic press has one piston of diameter 20 cm and the other piston of diameter 80 cm what force must be applied to
in the nuclear reaction 12252texd12453i the symbol dindicates deuterium nucleus 21h what can be concluded regarding xa
a radioactive isotope has an activity of 932times104 bq initially after 355 hours the activity is 671times104 bqa what
a cylindrical solenoid 40cm long with a radius of 5 mm has 300 tightly wound turns uniformly distributed along its
1 derive the electric field due to a dipole explain all the steps2 a sphere with radius 2 cm is placed at a location
the deflection plates in an oscilloscope are 10cm by 2cm with a gap distance of 1mm a hundred volt potential difference
1 explain why you are safe and unaffected inside a car that is struck by lightning also explain why it might not be
for n2 at 25oc and 100 atm calculate the number of collisions per second made by one molecule the number of collisions
the wavelength of red heliumndashneon laser light in air is 6328 nma what is its frequencyhzb what is its wavelength in
the index of refraction for red light in water is 1331 and that for blue light is 1340 a ray of white light enters the
the proper length of one spaceship is three times that of another the two spaceships are traveling in the same
which of the following does not produce a magnetic fielda a constant current through a straight wireb a charged
the lens of a slide projector with a focal length of a 120 mm projects a slide onto a screen that is 13 m away how far