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the world consumes energy at the rate of about 456 per year where the joule is the si energy unit convert this figure
a soccer ball is kicked with an initial horizontal velocity of 150 ms and an initial vertical velocity of 140 msa what
a carnot engine has 40 g of helium gas as its working substance it operates between two reservoirs of temperatures t1
if a car traveling at 23 ms is brought to a full stop in 38 s after the brakes are applied find the average
a 7200 kg roller coaster train with a speed of 900 kmh brakes to a stop at the end of the ride how many calories of
a container with a one-liter capacity at 27 degrees c is filled with helium to a pressure of 2 atm 1 atm 10x105 nm2
you drop a stone into a deep well and hear it hit the bottom 310 s later this is the time it takes for the stone to
a net force of256n accelerates a bike and rider at223ms2 what is the mass of the bike and rider
a swimmer is capable of swimming110ms in still watera if she aims her body directly across a 150-m-wide river whose
in 1916 milikan used measurements of the kinetic energy of photoelectrons to detemine plancks constant in order to
the energy of sunlight hitting the earth is about 1400 wm2 where 1 w 1 js in mid daya how much work is equivalent to
a cart is driven by a large propeller or fan which can accelerate or decelerate the cart the cart starts out at the
tuning forks are used in the diagnosis of nervous afflictions known as large-fiber polyneuropathies which are often
a coast guard cutter detects an unidentified ship at a distance of 220 km in the direction 150deg east of north the
a parallel plate capacitor has a potential difference between the plates of 80 v if the charge on one of the plates of
the potential difference between the plates of a parallel capacitor is 35 v and the electric field between the plates
an electron is initially at rest it is accelerated through a potential difference of 400 v what is the kinetic energy
a certain digital camera having a lens with focal length 750cm focuses on an object 190m tall that is 470m from the
a cubical gaussian surface surrounds two charges q1 33 times 10-12 c and q2 -20 times 10-12 c what is the electric
a hill that has a 418 grade is one that rises 418 m vertically for every 1000 m of distance in the horizontal direction
a highway is to be built between two towns one of which lies 440 km south and 710 km west of the other what is the
an electron has an initial velocity of 200 106 ms in a uniform 500 105 nc strength electric field the field accelerates
a 120 micro f capacitor is connected to a power supply that keeps a constant potential difference of 220v across the
an electron has an initial velocity of 800 106 ms in a uniform 700 105 nc strength electric field the field accelerates
suppose a grower sprays 72 kg of water at 0 degc onto a fruit treea how much heat is released by the water when it