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an aluminum cup contains 225 g of water and a 40 g copper stirrer all at 27degc a 480 g sample of silver at an initial
1 one end of a cylindrical pipe has a radius of 15 cm water density 10times103 kgm3 streams steadily out at 70ms the
a person travels in a car with a speed of 90 ms to get the drivers attention a stationary police officer behind the car
1 a 31 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen how much nitrogen
assume 800 g of hydrogen is separated into electrons and protons assume also the protons are placed at the earths north
an aquarium tank is 100cm long 35cm wide and 40cm deep it is filled to the top1 what is the force of the water on the
a rod of mass m 059 kg and length l35cm rotates about an axis during one end that is perpendicular to the rod compute
the uncertainty in the position of an electron along an x axis is given as 56 pm which is about equal to the radius of
an astronomical telescope has its two lenses spaced 752 cm apart if the objective lens has a focal length of 745 cm
movers are pushing a 780 kg trunk at 710 ms when they encounter a 225 m long stretch of floor where the coefficient of
a 700 g block is released from rest at heighth0 above a vertical spring by spring constant k 365 nm and negligible
during an adiabatic process the temperature of 372 rm mol of a monatomic ideal gas drops from 460rm circ c to 210rm
a vacuum cleaner is plugged into a 1200-v socket and uses 31 a of current in normal operation when the back emf
a 263 g block is dropped onto a vertical spring with force constant k 252 ncm the block sticks to the spring and the
a 200 g block is pressed against a spring of force constant 14 k nm until the block compresses the spring 10 cm the
a bicycle tire with a fixed volume of 025 liters and at constant temperature of 296k is pumped up so that its pressure
microwaves of wavelength 540 cm enter a long narrow window in a building that is otherwise essentially opaque to the
the neutrons in a neutron star chapter 44 in the textbook can be treated as a fermi gas by neutrons in place of the
a pot containing a plant weighing 10 n is hung from ceiling with a group of bungee cords if pulled down and released
the distant moon imaginarius has half the diameter of the earth the free-fall acceleration on the imaginarius is a 4
a possible means for making an airplane invisible to radar is to coat the plane by an antireflective polymer if radar
a spacecraft flies away from the earth with a speed of 490times106 rm ms relative to the earth and then returns at the
a car and its suspension system act like a mass-spring system with m 1200kg and k 58 knm its worn-out shock absorbers
curious about the resistance of an audio speaker luke klaus lee measures the resistance of a speaker which is labeled
explain what is the equation for the reaction between hydrochloric acid as well as sodium hydroxide when conduction an