Sally travels by car from one city to another. she drives for 30 min at 80 km/hr, 12 min at 105 km/hr, and 45 min at 40 km/hr, and she spends 15 min eating lunch and buying gas.
a. determine the average speed for the trip.
b. determine the total distance traveled.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole