In a simple electric circuit, a 24-ohm resistor is
connected across a 6.0-volt battery. what is the
current in the circuit?
(1) 1.0 a (3) 140 a
(2) 0.25 a (4) 4.0 a

We already know
Voltage = Current * Resistance
So Current = Voltage/ Resistance
Now we have to take note of all the information's that are already given in the question. The answer to the question can be easily deduced from the information's provided in the question.
Voltage of the circuit = 6.0 V
Resistance of the circuit = 24 ohm
Then
Current = 6/24 ampere
             = 1/4 ampere
             = 0.25 ampere
So the current in the circuit will be 0.25 A. The correct option among all the options given in the question is option "2".

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward