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assume all temperatures to be exact ice initially at 0 is added to 050l of tea at 18c to make the coldest possible
the intensity level of an orchestra is 82 db a single violin achieves a level of 70 db how does the intensity of the
the eeg physicians use electroencephalograms eegs to study electrical oscillations in the human brain so-called beta
after 600 kg of water at 773 oc is mixed in a perfect thermos with 300 kg of ice at 00 oc the mixture is allowed to
a uniform bar balances 266 cm from one end when a 0740 kg mass is hung from that end that balance point moves 856 cm
a 125kg- ball begins rolling from rest with constant angular acceleration down a hill if it takes 360s for it to make
a typical decibel level for a buzzing mosquito is 40 db and normal conversation is approximately 50 db how many buzzing
after a 0250-kg rubber ball is dropped from a height of 180 m it bounces off a concrete floor and rebounds to a height
a billiard ball moving at 600 ms strikes a stationary ball of the same mass after the collision the first ball moves at
one hundred turns of insulated copper wire are wrapped around an iron core of cross-sectional area 0100 m2 the circuit
a tennis player receives a shot with the ball 0060 0 kg traveling horizontally at 555 ms and returns the shot with the
a 470 kg woman stands up in a 700 kg canoe of length 500 m she walks from a point 100m from one end to a point 100m
a worker pushing a 350-kg wooden crate at a constant speed for 115 m along a wood floor does 320 j of work applying a
a nozzle of inner radius 100 mm is connected to a hose of inner radius 797 mm the nozzle shoots out water moving at 250
an aluminum cylinder weighs 100 n when this same cylinder is completely submerged in alcohol the volume of the
to understand the vector nature of momentum in the case in which two objects collide and stick together in this problem
a sinusoidal electromagnetic wave having a magnetic field of amplitude 135 mu t and a wavelength of 434 nm is traveling
a house painter is standing on a uniform horizontal platform that is held in equilibrium by two cables attached to
in figure a two circular loops with different currents but the same radius of 10 cm are centered on a y axis they are
a potters wheel having a radius 045 m and a moment of inertia of 114 kg middot m2 is rotating freely at 48 revmin the
an electron is confined in a harmonic potential well that has a spring constant of 150 nm what are the first three
you work in a materials testing lab and your boss tells you to increase the temperature of a sample by 349c the only
a person pushes a 130 kg lawn mower at constant speed with a force of 740 n directed along the handle which is at an
a 500 kg chunk of ice is sliding at 130 ms on the floor of an ice-covered valley when it collides with and sticks to
a resistor r 900 a capacitor c 025 microf and an inductor l 20 h are connected in series across a 240 hz ac source