Mary Rife, of Texas, set a women’s world speed record for sailing. In 1977, her vessel, Proud Mary, reached a speed of 3.17 x 102 km/h. Suppose it takes 8.0 s for the boat to decelerate from 3.17 x 102 km/h to 2.00 x 102 km/h. a) What is the boat’s acceleration? b) What distance would the boat travel during this time?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages