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the weight of the atmosphere above 1 m2 of earths surface is about 100000 n density of course become less with altitude
the heating element of a room heater is rated at 750w when itis operated from a 120v power supplya what is the
a 003 kg lead bullethits a steel plate and melts and splatters on impact assuming that the bullet recieves 80 of the
1 if the tension in a guitar string is increased by 20 by whatpercentage does the wave speed increasea 45b 95c 142
solid cylinder a long nonconducting solidcylinder of radius 49 cm has a nonuniformvolume charge density rho that is a
consider a charged metallic spherical shell of radius a175 cmthe potential at a distance of r60 cm from the center of
assuming euclidean geometry in an expanding universe and usinghubbles law find a formula which gives the angular size
a person throws a rock straight up into the air at the moment itleaves the persons hand it is going 33mph when the rock
an 8 lb weight stretches a spring 4ft the system resides in amedium offering a resistance to the motion equal to 15
a wrench is thrown at a speed of79 mph at a wall that is 44 ft away upon colliding with the wall thewrench exerts 77lb
a particle of charge 30 x 10-8 is in a unifromelectric field directed to the left it is released from rest andmoves a
an experiment youre designing needs a gas with gamma 159 you recallfrom your physics class that no individual gas has
200 ml of coffee density 1000kgm3 specific heat 4186jkg c is insulated in a mug at a temp of 85c if 25ml of cream
a 100g aluminum c900jkg c calorimeter contains 250 g of water c 4186jkg c the two substances are in thermal
the resistance and the magnitude of the current depend on the path that the current takes the drawing shows three
in a heart pacemaker a pulse is delivered to the heart 81 times per minute the capacitor that controls this pulsing
a 110-watt lightbulb uses an average power of 110 w when connected to an rms voltage of 120 vnbsp what is the
a ball is thrown upward at a speed v0 at anangle of 520deg above the horizontal it reaches a maximumheight of 88 m how
a carnot air conditioner takes energy from the thermal energy of a room at 70 degrees f and transfers it as heat to the
a car is driven east for a distance of 51 km then north for 30 km and then in a direction 31deg east of northfor 29 km
a very long solid cylinder with radius r has positive chargeuniformly distributed throughout it with charge per unit
an electrical motor spins at a constant 2675 rpm if the armature radius is 349 cm what is the acceleration of the edge
a 0140 kg baseball is thrown with a velocity of 40 ms it is struck with an average force of 50000 n which results in a
a 368 kg car moving at 164 ms hits from behind another car moving at 111 ms in the same direction if the second car has
a person walks in the following pattern 98 km north then 16 km west and finally 70 km south construct the vector