A passenger of mass m on a Ferris wheel moves in a vertical circle of radius R with constant speed v. Assuming that the seat remains upright during the motion, what is true about the force the seat exerts on the passenger at the top of the circle? A. The upward force is equal in magnitude to the passenger’s weight.
B. The upward force is greater in magnitude than the passenger’s weight.
C. The upward force is smaller in magnitude than the passenger’s weight.
D. The upward force is zero.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction