Longer wavelength UV/ X-ray
micro
visible Neht/shorter Wavelength
ultraviolet/longer wavelength
oftraviolet/X-rays)
le
fcan) cannot) damage living cells
can/cannot] damage living cells
7. Circle the phrase or term that correctly completes each sentence,
• You can see through (transparent / opaquel objects, which (transmit / absorb / reflect)
visible light
• The color of an obiect corresponds to the wavelenoths of visible lioht that it labsorbs /
con/000/000/100003
4/19/21, 9:28 AM
Page 3 of
kergroeld of
Cyan
4/19/21, 9:32 PM
Page 1 of 3
Dark blue
learning CD007001/3146003

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not