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A 450 Newton rightward force is used to drag a large box across the floor with a constant velocity of 0.678 m/s. the coefficient of friction between the box snd thr floor is 0.795. determine the mass of the box
A batter hits a fly ball which leaves the bat 0.88above the ground at an angle of 62 with an initial speed of 28 heading toward centerfield. Ignore air resistance. How far from home plate would the ball land if not caught? T
An unmarked police car traveling a constant 85km/h is passed by a speeder. what was the speeder's speed
A transverse wave on a string is described by the equation y(x, t) = (2.12 cm) sin[(101 rad/s)t + (14 rad/s)x]. How fast does the wave move along the string
The electron gun of a television tube accelerates an electronfrom rest through a potential difference of 350V. evaluate the change in the potential energy of the electron
Calculate the doppler shift of x rays emitted from shocked silicon in a supernova remnant of the ejected material is moving at 5000 km/sec
a football is kicked at ground level with a speed of 16.6ms at an angle of 42.9 to the horizontal. how much later does
The orbital angular momentum of an electron has a magnitude of 4.716*10^-34 kg*m^2/s. What is the angular-momentum quantum number l for this electron
0.80 m and the mass of the particle the bob at the end of the cable is 0.24 kg. the pendulum is pulled away from its
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift is performed in three stages, each requiring a vertical distance of 14.0 m
A 700. newton stunt pilot flying a 980.kg plane in a vertical loopwith a radius of 600. meters is "weightless" at the top of theloop. Calculate the plane's speed
Two wheels have the same mass and radius of 4.8 kg and 0.54 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotational..
Two loud speakers face each other, vibrate in phase, and produceidentical 451 Hz tones. A listening walks from one speakertoward the other at a constant speed and hears the loudness change(loud-soft-loud) at a frenquency of 2.84 Hz.
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