A student of mass M stands on a newton scale in an elevator. At the instant the elevator has a upward acceleration of 1.50 m/s^2? and an downward velocity of 3.0 m/s, the scale reads approximately:
A)12.8M Newtons
B)11.3M Newtons
C)8.3M Newtons
D)6.8M Newtons

Which property of fossils allow scientists to determine the relative rock ages..

Aparticle travels in a circular orbit of radius 21 m. its speed is changing at a rate of 23.1 m/s2 at an instant when its speed is 37.2 m/s. what is the magnitude of the acceleration (in m/s? ) of the particle?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)