A 150 m long train travels at 72 km/h (20 m/s). what is the time span does the train spend to completely cross a 100 m long bridge?
A) 1.16 s
B) 3.47 s
C) 0.72 s
D) 2.08 s
E) 12.5 s
(if you can put the calculations)

Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.