Aspaceship travels away from earth at 0.99 c. if 20 years elapse on earth before it reaches its destination, how long is the journey on the spacecraft? a. 142 years b. 7.1 years c. 2.8 years d. 20 years

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Acar travels 40m in 8 seconds find the car speed