Which of the following refers to a force of resistance that acts on an object when the object moves against other matter?
O A. Balanced force
B. Inertia
C. Friction
D. Contact force

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?