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A football kicker can give the ball an initial speed of 34 m/s. What are the (a) least and (b) greatest elevation angles at which he can kick the ball to score a field goal from a point 45 m in front of goalposts whose horizontal bar is 3.44 m above the ground.
A see-saw board is supported at its center by a fulcrum A 25 kg person sits 80 cm from center. How much force does the fulcrum exert on board
two flexible wires (massless) suspend a 10 cm-long conductor in the magnetic field with b = 4.2T. what is the current to let the wire just have zero tension
A coil has a DC resistance of 90 ? and animpedance of 200 ? at a frequency of 1.5 kHz. What is the inductance of the coil
a 30 kg block on a frictionless surface experiences two perpendicular forces in the x and y directions. if the force in
The density of a 3.0-m long rod can be described by the linear density function ?(x) = 135 g/m + 13.6x g/m2. find the center-of-mass of the rod
If 100 physics students each give off 100 W as they sit in the classroom taking an exam, estimate the temperature increase of the room during the hour-long test
Two conductors having net charges of +14.0 µC and -14.0 µC have a potential difference of 14.0 V between them. Determine the capacitance of the system
(a) In what direction are the electrons deflected? toward the negative plate toward the positive plate (b) By how much are the electrons deflected after passing through these plates?
Find the mode configurations and frequencies for transverse oscillations of a beaded string of 5 beads with one end fixed and one end free to move. Plot the five points on a dispersion relationship ω vs k
Two sound sources radiating in phase at a frequency of 485 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find out the separation between the two sources.
Two converging lenses, each of focal length 13.4 cm, are placed 62.5 cm apart, and an object is placed 27.6 cm in front of the first. Where is the final image relative to the second lens formed
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, what is the height of the final image
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