A girl turns over a plastic cup so that the open end is facing down, and then
completely submerges it in a pool of water. In doing so, she traps air in the
cup so that both the air and the cup have a volume of 237 cm
Approximately how much force must she use to keep the cup from popping
up out of the water, assuming that the weight of the cup and air can be
neglected? (Recall that the density of water is 0.001 kg/cm and g = 9.81
m/s2.)
O A. 7.5N
B. 2.3 N
O C. 11.6 N
O D. 4.6 N

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j