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a certain camera lens has a focal length of 149 mm its position can be adjusted to produce images when the lens is
a double star is a system of two stars say having massesm1 and m2 moving around the centre ofinertai of the system due
a skier slides down along a frictionless snow slope starting from rest at point a with elevation ha 84 m ignore air
a u shaped tube with a constant radius is filled with water and oil as shown the water is a height h1 037 m above the
the human body must maintain its core temperature inside a rather narrow range around 37degc metabolic processes
a skier of mass 700 kg is pulled up a slope by a motor-driven cablea how much work is required to pull the skier a
a thermodynamic system undergoes a process in which its internal energy increases by 490 j at the same time 250j of
two solid uniform flywheels each of mass 650 kg and radius 147 m rotate independently around a common axis the first
to prevent damage to floors and to increase friction a crutch will often have a rubber tip attached to its endif the
according to the guinness book of world records the longest home run ever measured was hit by roy dizzy carlyle in
waly whacko claims to have invented a heat engine that will revolutionize industry it runs between a hot source at
a ball and a thin plate are made from different materials and have the same initial temperature the ball does not fit
a 40 n crate starting at rest slides down a rough 6m long ramp inclined at 30 degrees with the horizontal the force of
a 022 m radius pulley if free to rotate about a horizontal axis a 205 kg mass and an 80 kg mass are attached by a
a small immersion heater is rated at 400w estimate how long it will take to heat a cup of soup assume this is 474 ml of
monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 300 m away if the
wrongly called for a foul an angry basketball player throws the ball straight down to the floorif the ball bounces
each croquet ball in a set has a mass of 50kg the green ball travels at 105ms and strikes a stationary red ball if the
in an experiment the speed of sound in air a student a measures a column of air in a resonance tube the first resonance
a horseshoe mass 050 kg which has just been forged is dropped into 27l of water in a 045kg iron pot initially at 22 c
an electric vehicle starts from rest and accelerates at a rate of22 ms2 in a straight lineuntil it reaches a speed of
a projectile is launched from ground level to the top of a cliff which is 95 m away and 135 m high see fig 3-60 if the
a hoodlum throws a stone vertically downward with an initial speed of 120 ms from the roof of a building230 m above the
a 12-rm cm-tall candle flame is 58rm cm from a lens with a focal length of 22rm cma what is the image distanceb what is
the distance between two probes is 18 x 10-2m the potential difference between the probes is 111v determine the