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a source emits sound of wavelength 254m an 274m in air use the speed of sound343msa write the equations of these two
an industrial laser is used to burn a hole through a piece of metal the average intensity of the light is s 138 109
two in-phase speakers 20 m apart in a plane are emitting 1800 hz sound waves into a room where the speed of sound is
the fundamental frequency of an open-open tube is 1800hz when the tube is filled with zero celicus helium what is its
1 what are the three longest wavelengths for standing waves on a 294-cm-long string that is fixed at both ends2 if the
neil a armstrong was the first person to walk on the moon the distance between the earth and the moon is 385 108 m find
the spaceship enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be
suppose that a police car on the highway is moving to the right at 30 ms while a speeder is coming up from almost
suppose one gallon of gasoline produces 11 x 108 j of energy and this energy is sufficient to operate a car for twenty
a 300-g bullet traveling horizontally at 400 ms hits a 300-kg wooden block which is initially at rest on a smooth
a woman is 17 m tall and has a mass of 51 kg she moves past an observer with the direction of the motion parallel to
a meterstick pivoted about a horizontal axis through the 0-cm end is held in a horizontal position and let go awhat is
item 4 to start her lawn mower julie pulls on a cord that is wrapped around a pulley the pulley has a moment of inertia
a 2500- ferris wheel accelerates from rest to an angular speed of 021radsec in 14sec approximate the ferris wheel as a
an amusement park ride consists of a swing hanging from a chain attached to a spinning mechanism the swing forms a
a 15 g bullet is fired at a 21 kg wooden block which is hung at the end of 135 meter long string as a ballistic
in the figure figure 1 the upper ball is released from rest collides with the stationary lower ball and sticks to it
a box of bananas weighing 440n rests on a horizontal shysurface the coefficient of static friction between the box and
a circuit containing a 59 h inductor has an alternating current supplied to it if irms is 66 a and vp is 70 v find the
an automobile crankshaft transfers energy from the engine to the axle at the rate of 536 kw when rotating at a speed of
a spherical steel ball bearing has a diameter of 2540 cm at 2600degc assume the coefficient of linear expansion of the
a flywheel turns through 26 rev as it slows from an angular speed of 63 rads to a stop a assuming a constant angular
in the figure a stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the
some european trucks run on energy stored in a rotating flywheel with an electric motor getting the flywheel up to its
you place 108 moles of hydrogen gas in a balloon of volume 23 m3 and find the pressure to be 16 times atmospheric