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a typical frequency used by gsm cell phones is 6110 mhz what is the wavelength of this
1 calculate the amount of energy it takes to melt a waxcalculate the amount of energy in joules needed to melt a wax
a stick is resting on a concrete step with 25 of its length hanging over the edge a single ladybug lands on the end of
a 80g 39-cm-long rod hangs vertically on a frictionless horizontal axle passing through its center a 14g ball of
a family goes on vacation for one week but forgets to tun off an electric fan that consumes electricity at the rate of
does a atom gain or lose energy going from lyman series to balmer series does a atom gain or lose energy going from
beams of high-speed protons can be produced in guns using electric fields to accelerate the protons a what acceleration
the distance from the earth to the nearest stars is measured in light-years convert the distance 54 light-years to si
an electron with a speed of 700 108 cms enters an electric field of magnitude 100 103 nc traveling along the field in
a 1200 kg car whose transmission is in neutral is coasting down a 10 hill with its brakes used to maintain a constant
an object of unknown mass is attached to an ideal spring with force constant 130 and is found to vibrate with a
an engine with an output of 300 w has an efficiency of 350 it works at 1300 cycless how much work is done in each
a 900 kg truck is driving at 45 ms when it hits a large soft object and becomes embedded with ita find the amount of
the surface of the sun has a temperature of 5500 c and the temperature of deep space is 30 k find the entropy increase
1 a 500 kg block is pulled from rest by a force of 10000 n at an angle of 370deg across a horizontal rough surface over
car a is moving east at a speed of 40mps relative to the ground car b is moving west at 50mph relative to the ground
an air conditioner is used to keep the interior of a house at a temperature of 20 c while the outside temperature is 35
what work must a diesel engine in an 18000kg truck do to increase its speedfrom 30 ms to 40 ms in 50 seconds what
physics ii lenses two converging lenses each has focal length of 20 cm they are separated by a distance of 70 cm an
a 30kg ball is shot straight up from the ground with an initial velocity of 75ms using the principle of conservation of
a spring with the spring constant k14nm is compressed 15cm what is the elastic potential energy stored in the
planks equation is being used to estimate the convective heat transfer coefficient in a food being frozen in an air
consider a hydrogen atom with the electron in the n 7 shell the magnitude of the ground state energy of the hydrogen
if a four engine jet accelerates down the runway at 2ms2 amp one of the jet engines fails how much acceleration will