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Q. An electron is accelerated from rest by a potential difference of 461 V. It then enters a uniform magnetic field of magnitude 184 mT with its velocity perpendicular to the field. Calculate (a) the speed of the electron and (b) the radius of its path in the magnetic field.
Q. A candle is placed 13.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 6.5 cm farther away from the mirror. Find the focal length of the convex mirror.
A man pushes on a piano with mass 200 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 18.3^circ above the horizontal floor. Ignore any friction acting on the piano.
Calculate the location of the center of mass of the Earth-Moon-Sun system during a full Moon. A full Moon occurs when the Earth, Moon, and Sun are lined up. make Use of a coordinate system in which the center of the sun is at x=0 and the Earth and..
How to find the position and height of an image
A uniform steel beam has a mass of 1640 kg. On it is resting half of an identical beam. What is the vertical support force at each end.
Two people are holding up the ends of a 4.75-kg wooden board that is l = 2.00 m long. A m = 3.00-kg box sits on the board, 0.50 m from one end. What forces do the two people exert.
A superhero flies 287 meters from the top of a tall building at an angle of 17 degrees below the horizontal. What is the vertical component of the superhero's displacement? Answer in units of meters. The horizontal is 274.459 meters and the vertical ..
A Carnot engine whose cold reservoir temperature is 1.0 C has a thermal efficiency of 40%. By how much should the temperature of the hot reservoir be increased to raise the efficiency to 60%?
Two objects attract each other gravitationally with a force of 2.3×10-10 when they are 0.65 apart. Their total mass is 5.0 . Find out their individual masses.
In a bicycle race, the leader is travelling with a constant velocity of 11.10 m/s and is 10.0 m ahead of the second-place cyclist. The second place cyclist has a velocity of 9.50 m/s and an acceleration of 1.20 m/s squared. How much time elapses b..
In a physics laboratory experiment, a coil with 200 turns enclosing an area of 12.0 cm^2 is rotated from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to field.
A car travelling at 25.0 {rm m/s} runs out of gas while travelling up a 22.0^circ slope. How far will the car go up the hill before it runs out of gas.
A 340 g air track cart traveling at 1.25 m/s collides elastically with the 300 g cart traveling in the opposite direction at 1.33m/s. What is the speed of the 300g cart after collision.
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