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a machine is designed to perform a given amount of work in a given amount of time a second machine does twice the same
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you hit a 02 kg golf ball up at 40o from the horizontal it travels for 486 s and stops on an elevated green 10 m above
suppose a manufacturing plant has an average sound intensity level of 970 db created by 25 identical machinesa find the
after staying on penitgy for a few days the landing craft returns to its mothership at take-off both engines are run at
after a plant or animal dies its 14c content decreases with a half-life of 5730 years if an archaeologist finds an
after 202 days the activity of a sample of an unknown type radioactive material has decreased to 882 of the initial
one of the 610cm -long strings of an ordinary guitar is tuned to produce the note b3 frequency 245 hz when vibrating in
a landing craft approaches the surface of penitgy a planet in a far-away galaxy the landing craft has two engines
a 30-cm tall height ad 40 in diameter plastic tube has a sealed bottom the mass of the tube if 300g then a 250g of lead
a what is the maximum number of lines per centimeter a diffraction grating can have and produce a complete first-order
a car is designed to get its energy from a rotating flywheel solid disk with a radius of 100 m and a mass of 550 kg
a camera has a lens w a 52 mm focal length and a sensor array that measures 482mm x 364 mm suppose your at a zoo and
assume you knew some unstable particles have a half life of 100 seconds when not moving but had a half-life of 500
a rifle is aimed horizontally at a target 50 m away the bullet hits the target 20 cm below the aim pointa what is the
you are in the neighborhood of a star radius of 700000 kilometers which has emitted so many protons solar wind during