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Helium atoms emit light at several wavelengths. Light from a helium lamp illuminates a diffraction grating and is observed on a screen 50.00 cm behind the grating. The emission at wavelength 501.5 nm creates a first-order bright fringe 21.90 cm from the central maximum. What is the wavelength of the bright fringe that is 31.60cm from the central maximum?
A person on earth notices a rocket approaching from the right at a speed of 0.78c and another rocket approaching from the left at 0.58c. What is the relative speed between the two rockets, as measured by a passenger on one of them?
A 17 g bullet is accelerated in a rifle barrel 73.4 cm long to a speed of 493 m/s. Use the work-energy theorem tofind the average force exerted on the bullet while it is being accelerated. Answer in units of N.
An 82.5 kg fullback moving east with aspeed of 5.4 m/s is tackled by a87.0 kg opponent running west at3.28 m/s, and the collision is perfectly inelastic. Calculate the decrease in kinetic energy during the collision.
A weight lifter raises a 1181 N weight a vertical distance of 2.10 m in a time interval of 2.25 s. Compute the power provided by the weight lifter's force
An ion harvester is scouring deep space for isolated xenon (Xe+) ions. A xenon ion is singly ionized and has the charge of +e. If the field meter reads 0.000000202 N/C, how far away is it from the ion.
An apple is dropped from a 25m cliff. At the similar time, a person at the bottom of the cliff fries an arrow up towards the apple. The arrow sticks the apple 0.450 seconds later.
How far from a concave mirror of radius 0.25 m must an object be place for a real image to be formed 1 m from the mirror? What is the magnification of that image
A 6.75kg bucket hangs at the end of a rope. you pull horizontallyand raise the bucket 4m (over a frictionless pulley)
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.42 106 m/s. How long does it take the proton to reach this speed
A spherical mirror has a focal length of +10cm. Find the location and then describe the miage for an object for an object distance of 25cm. How fast does the image of the object move
A disk of radius R and unifrom surface charge density sigma spins with angular velocity Omega about the y-axis. Find its magnetic dipole moment.
Two very large parallel sheets are 5.00 apart. Sheet carries a uniform surface charge density of -8.60 , and sheet , Find the magnitude of the net electric field these sheets produce at a point 4.00 to the right of sheet
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