The period of a mechanical wave is 12 seconds what is the frequency of the wave 12 waves/seconds 4.0 waves/seconds 0.083 waves/seconds i rally need it

Avoltage source vs = 10 v is in series with a resistor of 10 kohm. if the source transformation theorem is applied, what will the value of the current source be in ma ?

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?