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Determine the force acting on a moving electron when it enters a magnetic field which is perpendicular to its direction of motion.
The rms speed of the molecules in 1.8 g of hydrogen gas is 1600 m/s. What is the total translational kinetic energy of the gas molecules?
A 56.0 kg girl weighs herself by standing on a scale in an elevator. What is the force exerted by the scale when the elevator is descending at a constant speed of 10 m/s?
What is the mass of the block of ice? If the worker stops pushing at the end of 5sec,how far does the block move in the next 5s?
Two adjacent natural frequencies of an organ pipe are determined to be 299 Hz and 345 Hz. (Assume the speed of sound is 343 m/s.) (a) Calculate the fundamental frequency of this pipe.
Your friend then picks up the ball and throws it up to you, such that it just comes to rest in your hand. What is the speed with which your friend threw the ball?
A boy runs 7.4 blocks north, 19.4 blocks northeast, and 5.4 blocks west. Determine the legth of the displacement vector that goes from the starting point to his final position.
During the process the mechanical device pushing the piston to compress the gas is found to expend 4 kJ of energy. What is the magnitude of the heat flow between the heat reservoir and the gas and i
A 0.200-kg block is placed on a vertical spring (k = 5.00x10^3) and pushed downward, compressing the spring 0.100 m. As the block is released, it leaves the spring and continues to travel upward. W
Which of the following is not true regarding social development?
as a racing car zooms by you, its pitch increases by 20%. If the speed of sound is 345 m/s, how fast is the car travelling?
When the play button is pressed, a CD accelerates uniformly from rest to 475 rev/min in 3.5 revolutions. If the CD has a radius of 6 cm, and a mass of 17 g, what is the torque exerted on it?
When an automobile moves over a wide, closed loop of wire embedded in a road surface, is the magnetic field of the Earth within the loop altered? Is a pulse of current produced?
A 1500 kg car accelerates uniformly from 44.0 km/hr to 80.0 km/hr in 10.0 s. What was the net force exerted on the car?
A charged practical enters the magnetic field of a mass spectrometer at a speed of 1.79*10^8 m/s . It subsequently moves in a circular orbit with radius 16.0 cm in a uniform magnetic field of magnit
A thin metallic shell of radius 40 cm has a charge of -25 nC on it. At the center of the sphere is a point charge of 35 nC. What is the electric field 15 cm from the center of the shell?
How far (in km) and in what direction (as an angle from due east, where north of east is a positive angle) must it now sail to reach its original destination?
The acceleration of gravity is 9.8 m/s2. Where does the package strike the ground relative to the point directly below where it was released?
A roller coaster, shown in Fig. 6-38 (h1 = 50 m, h2 = 12 m, h3 = 27 m), is pulled up to point A where it and its screaming occupants are released from rest. Assuming no friction, calculate the spee
man pushes a lawn mower on a level lawn with a force to 200 N. If 50% of this force directed horizontally, how much work, in J, is done by the man in pushing the mower 7.2 m?
The right at 2.00 m/s while the other of mass 65.0 kg is moving to the left at 2.50 m/s what are the magnitude and direction of the velocity of these skaters just after they collide.
A small ball of mass 33 g is suspended from a string of length 39 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 26? with the vertical, find the centripet
A thin copper rod 1.00 m long has a mass of 50.0 g. What is the minimum current in the rod that would allow it to levitate above the ground in a magnetic field of magnitude 0.100 T?
Calculate the horizontal force that must be applied to proudce an acceleratrion of 1.8 g for a 1.2 kg puck on a horizontal friction-free air table?
A 89-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.8 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, as