If the x-component of the velocity of an electron can be measured only to a precision of 5 × 10–2 m/s, what is the minimum uncertainty of the position of the electron in the x-direction? ( ) Group of answer choices 1 × 10–3 m 2 × 101 m 8.6 × 102 m 1.1 × 10–33 m 9.5 × 1032 m

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm