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An object is 29 cm away from a concave mirror's surface along the principal axis. If the mirror's focal length is 9.50 cm, how far away is the corresponding image?
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 i
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
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,
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 ba
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)?
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 f
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
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 a
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 0.225 kg sample of tin initially at 97.5°C is dropped into 0.115 kg of water. The initial temperature of the water is 10.0°C. If the specific heat capacity of tin is 230 J/kg •°C,
When the loop is placed inside a solenoid and direction of the current is reversed the plastic beam will move in the opposite direction. Explain please
A particular guitar string is supposed to vibrate at 183 Hz, but it is measured to vibrate at 219 Hz. By what percent should the tension in the string be decreased to correct the frequency.
A sailboat leaves a harbor and sails 1.8 km in the direction 65° south of east, where the captain stops for lunch. A short time later, the boat sails 1.1 km in the direction 15° north of ea
A tank of water 3.0 m deep sits on a table 1.0 m tall. A hole is located 2.0 m from the bottom of the tank. Water flows out of the hole and strikes the ground. where does it strike the ground? Assu
A worker stands still on a roof sloped at an angle of 39° above the horizontal. He is prevented from slipping by a static frictional force of 440 N. Find the mass of the worker.
Meanwhile, Isaac is piloting his ship in the westward direction, also at 0.88, toward Albert's ship. With what speed does Isaac see Albert's light beam pass his ship?
A hollow sphere is rolling along a horizontal floor at 7.00 m/s when it comes to a 39.0^circ incline. how far does it go up the incline before coming to a stop and roll back down?
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. The throw is made with an initial speed of 15.0 m/s at an angle of 38.0^circ above
A positively charged particle of mass 6.00 10-8 kg is traveling due east with a speed of 25 m/s and enters a 0.46 T uniform magnetic field. What is the magnitude of the charge of the particle?
A banked circular highway curve is designed for traffic moving at 67 km/h. The radius of the curve is 209 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coeff
A centrifuge rotor has a moment of inertia of 3.40 10-2 kg·m2. How much energy is required to bring it from rest to 8000 rpm?
A charge of 4.40 10-9 C is located 3.0 m from a charge of -2.95 10-9 C. Find the magnitude of the electrostatic force exerted by one charge on the other.
Find the transmitted intensity for each of these solutions when placed between crossed polarizers. The incident beam is unpolarized and has an intensity of 10.0 {rm W/m^{2}}.
Aluminum has a density of 2.7 103 kg/m3 and a molar mass of 27 g/mol. The Hall coefficient of aluminum is R = -3.0 10-11 m3/C. What is the number of conduction electrons per aluminum atom?