17- Soient deux conducteurs ohmiques de résistances R1 =10 22
et R2=2012.
Calculez la résistance du conducteur
ohmique équivalent lorsque ces deux
conducteurs sont groupés;
a- en série
b- en dérivation.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.