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an ambulance is generating a siren sound at a frequency of 2400 hz the velocity of sound is 340 ms the observer is
the speed of sound in air at 0 degrees c is 331 ms if the density of air is 129 kgm3 then what is the bulk modulus of
a heat engine has an efficiency of 350 and its power output is 600 w what is the rate of heat
light of wavelength 530 nm is incident on two slits that are spaced 10 mm apart how far from the slits should the
astronauts use a centrifuge to simulate the acceleration of a rocket launch the centrifuge takes 25 seconds to reach
an airplane is to drop an abject to hit a target on the ground the plane is flying at a constant speed of 300 kmh
an elevator moving upward approaches the top floor of a high rise building and begins to slow down at the rate of 200
the angular resolution of a radio telescope is to be 0100 degrees when the incident wave has a wavelength of 300mm what
an underwater scuba diver sees the sun at an apparent angle of 450 degrees above the horizontal what is the actual
for a step-down transformer the input voltage is 120v rms and output is to be 6v rmsa what should be the number of
an rlc circuit consists of a 100 omh resistor a 20 micro coulomb capacitor and a 400mh inductor connected in series
the speed distribution of molecules in the earths atmosphere has a significant impact on its compositiona what is the
an object is placed 15 cm from a converging lens with a 50-diopter refractive power at what distance from the object
a boat with a speed of 100 ms aims directly across a 250-m-wide river if the water current is 200 ms how far downstream
a traveler flew due east from city a to city b 150 miles away and then made a connecting flight to city c 250 miles
a 23-g lead bullet is shot with a speed of 320 ms into a wooden wall assuming that 60 of the kinetic energy is absorbed
a small airplane needs to reach a speed of 300 kmh to take offwhat is the minimum length of a runway in m that can
a projectile is launches at 450o with the horizontal its initial speed is 250 msa what is its speed and direction when
the energy of a particle in the n 3 excited state of a harmonic oscillator potential is 587 ev what is the classical
a 200-g hockey puck is launched up a metal ramp that is inclined at a 30 degree angle the coefficents of static and
light of wavelength 530 102 nm passes through a slit of width 0210 mma find the width of the central maximum on a
suppose that 500 ml of a 00500 m solution of pbno32 is mixed with 400 ml of a 0200 m solution of naio3 at 25degc
a transparent oil with index of refraction 128 spills on the surface of water index of refraction 133 producing a
a gas sample in a piston container has a volume of 20 liters at 10 atm and 27 oc the temperature is changed such that
two coils are wound around the same cylindrical form when the current in the first coil is decreasing at a rate of