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a microwave projects 10kw of power onto a 0250-m2 area what is the intensity of the microwave what is the peak
when a atom absorbe energy and go ground state to a excited state whether the kinetic energy of this atom will change
using a grating with a spacing of 000045 cm a line which looks like red light appears 32 cm from the central line on a
a proton moving in a uniform magnetic field withv1127times106ims experiences forcef 1146times10-16kn a second proton
1 64 g of a radioactive substance is prepared 85 hours later only 2 g remains to the nearest hour what is the
the momentum of object 1 is 666942 kg ms the momentum of object 2 is 323914 kg ms object 1 collides with object 2 and
the momentum of object 1 is 286761 kg msnbspthe momentum of object 2 is 14445 kg msnbspnbspobject 1 collides with
object 1 has a mass 862 and is moving to the right at 153 ms object 2 has a mass 593 and is moving to the left at 122
the gravitational potential energy of a person on a 30-m-high diving board is 1800j what is the persons
a horizontal circular wire loop of radius 06 m lies in a plane perpendicular to a uniform magnetic field pointing from
a 187 m long steel beam is accidentally dropped by a construction crane from a height of 677 m the horizontal component
the plane of a rectangular coil 59 cm by 7 cm is perpendicular to the direction of a uniform magnetic field bif the
an ac voltage source has an rms voltage of 16 volts and it is connected in series to an inductor a capacitor and a
the proper tangential speed for machining cast iron is about 0630nbspms at how many revolutions per minute should a
an ice cube is placed in a microwave oven suppose the oven delivers 105 w of power to the ice cube and it takes 32300 j
a diverging lens has a focal length of - 100 mm an object is 750 mm to the left of the lens a the image is mm to the
a converging lens has a focal length of 100mm an object is 245 mm to the left of the lens a the image isnbspmm to the
a beam of light incident at 35o to the surface normal from the air side n 100 if the refracted medium is water n 133
anbsp68nbspkg adult sits at one end of anbsp105nbspm long board hisnbsp35nbspkg child sits on the other enda where
a hot metal bolt of mass 006 kg and specific heat capacity 899 jkgdegc is dropped into a calorimeter containing 016 kg
a thick window pane 0367 cm has an area of 1247 square meters the temperature difference between the inside and outside
the kinetic energy of a stone is 588 joules at the time of projection what maximum height does the 02 kg stone reacha
a gasoline engine receives 250 j of energy from combustion and loses 200 j as heat energy to the exhaust what is its
836 kj of heat is supplied to 2 kg of water c 4160 jkgdeg c what is the increase in the temperature of wateran engine
a 313nbspkomeganbspresistor is connected to a generator with a maximum voltage of 241nbspv find average power and find