un bus de 12 m de longitud pasa por el costado de un poste fijo durante 0,5s ¿Cuánto tardara en cruzar completamente un puente rectilíneo de 132 m de largo?

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular