A student examines the motion of waves on a Slinky by oscillating the spring along the floor. The student took a snapshot of the motion as shown. If the student oscillates the Slinky 4 times per second, what is the velocity of the wave? a. 0.5 m/s

b. 1m/s

c. 2m/s

d. 4m/s

Asample of a gaseous substance changes into a liquid

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Blank liquids and gases exert a buoyant force on objects placed in them