Katelyn runs along the aisle of a train that moves at 8 m/s. Her speed relative to the floor is 3 m/s. Her speed relative to an observer at rest on the ground is
A) 5 m/s.
B) 11 m/s.
C) either depending on her running direction
D) none of the above
Answer: C
You might also like to view...
Regular disturbances that carry energy through matter or space:
a) Crest b) Wave c) Energy d) Trough
The electric field associated with a uniformly charged hollow metallic sphere is the greatest at:
a. the center of the sphere. b. the sphere's inner surface. c. infinity. d. the sphere's outer surface.
The magnetic field at a distance of 2 cm from a current carrying wire is 4 ?T. What is the magnetic field at a distance of 4 cm from the wire?
A) 1/2 µT B) 1 µT C) 2 µT D) 4 µT E) 8 µT
A narrow slit is illuminated with sodium yellow light of wavelength 589 nm. If the central maximum extends to ±30.0°, how wide is the slit?
a. 0.500 mm b. 2.20 × 10^?6 m c. 3.33 × 10^?5 m d. 1.18 ?m e. 5.89 ?m