2 An a. c. source is connected to an oscilloscope. The waveform of the alternating potential
difference from the source is displayed on the oscilloscope screen as below.
a) The Y-gain setting of the oscilloscope is 2.0 V/cm. Determine the amplitude of the
alternating potential difference.
c) The time-base setting of the oscilloscope is 0.010 seconds per cm.
Determine the frequency of the alternating potential difference.

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) determine the magnitude and direction of projectile velocity at t= 1.3s b) determine the magnitude and direction of projectile acceleration at t=1.3s

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

More solar radiation is absorbed by earth’s surface than by