The four resistances are R1 = 1 , R2 = 2 , R3 = 4 , and R4 = 12. The power source has a potential difference V = 12 V. (a) Find the equivalent resistance of the circuit. (b) What is the value of the current I in the circuit? (c) Find the currents in R3 and R4.

Planck decided to assume that atoms could only vibrate at certain frequencies that were whole numbers eg 2f, 3f and so on. others used to think that atoms vibrate continuously

Dust and gases contract.

Is writing an option

When calculating percentage we need two numbers. one number represents total amount of certain thing and another number represents partial number of that thing. then we divide those two numbers.in this problem total amount represents total number of weeds growing on some surface. partial number represents chicory.percentage = partial / total * 100%percentage = 29 / 98 * 100%percentage = 29.6%our calculation is closest to answer b) so this is our correct answer.