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A 120 kg hiker puts on a pair of snowshoes that have an effective combined surface area of 0.80 square meters. How much pressure does he exert on the snow?
The distance between the objective and eyepiece lenses in a microscope is 24cm, What eyepiece focal length will give the microscope an overall angular magnification of 350
A transformer for an answering machine takes an ac voltage of amplitude170V as its input and supplies a8.4V amplitude to the answering machine. How many turns does the secondary have
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the amount the spring compresses
A 460-Hz tuning fork causes resonance in the tube depicted in the figure below when the length L of the air column above the water is 18.3 and 55.8 cm, Find the speed of sound in air
If the human aorta has a cross-sectional area of 2.5 cm2 and the flow speed of blood in the aorta is 30 cm/s while the density of blood is 1.05 g/cm3. Calculate the mass flow rate of blood (in g/s) in the aorta
a soccer ball is kicked from the ground with an initial speed of 18.0 ms at an upward angle of 46.3. a player 53.2 m
steam at 18mpa and 600 c is contained in a cylinder of volume 0.5m3 , calculate the heat rejected by the steam
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of8.20cm. If the cork is10.5m from shore, how long does it take a ripple passing the cork to reach the shore?
A tank having a volume of 0.100 m3 contains helium gas at 135 atm. How various balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.50 atm.
which type of galaxy mostly consists of a collection of older red stars that are located in the center with blue and
A lead fishing weight with a mass of 57.0g absorbs 146cal of heat. If its primary temperature is 50 C, what is its final temperature.
A solid lead cylinder and a solid platinum cylinder have the same mass. What is the ratio of the length of the platinum cylinder to the length lead cylinder if their diameters are the same
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