Find angular magnification obtained when image is formed
A lens having a focal length 32 cm is used as a simple magnifier. What is the angular magnification obtained when the image is formed at the normal near point (25 cm)?
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The kinetic energy of the book on the top shelf is zero, so there is no change in kinetic energy. Yet you did some work in lifting the book. Is the work-kinetic energy theorem violated?
A downed pilot fires a flare from a flare gun. The flare has an initial speed of 250 m/s and is fired at an angle of 35° to the ground. How long does it take for the flare to reach its maximum altitude?
A 22-g ball is fired horizontally with initial speed vi toward a 98-g ball that is hanging motionless from a 1.1-m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 100-g ball swings out to a maximum angle of
A 8.00 cm diameter wire coil is iniA 6.70cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.570T pointing up. During the course of 0.180s, the field is changed to one of 0.300T pointing down. W
A hot-air balloon is rising straight up with a speed of 3.27 m/s. A ballast bag is released from rest relative to the balloon when it is 7.24 m above the ground. How much time elapses before the ballast bag hits the ground?
A solid cylinder (M=2.15 kg, R=0.133 m) pivots on a thin, fixed, frictionless bearing. A string wrapped around the cylinder pulls downward with a force F which equals the weight of a 0.750 kg mass, i.e., F = 7.357 N. Calculate the angular accelera
A charge of -3.55 nC and a charge of -5.2 nC are separated by a distance of 60.0 cm. Find the position at which a third charge of +7.00 nC can be placed so that the net electrostatic force on it is zero.
A 550 N physics student stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 450N. (a) Find the acceleration of the elevator (magnitude and direction) (b) What is the acceleration if the scale reads 670 N? (c)
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