An alpha particle (charge = +2e) is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the alpha particle when it is at a distance of 2 × 10^?14 m away from the gold nucleus? (e = 1.6 × 10^?19 C)


91 N

Physics & Space Science

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Comparing the speed of sound in liquids, gases, and solids, the speed of sound is usually lowest in ____ and highest in ____

a. solids, liquids b. gases, liquids c. liquids, solids d. gases, solids

Physics & Space Science

The following conversion equivalents are given:

1.0 mile = 5280 ft 1.0 ft = 12 in 1 m = 39.37 in 1.0 hour = 60 min 1.0 min = 60 s If a deer runs at 4.7 mi/h, its speed, in meters per second, is closest to A) 2.1 m/s. B) 1.7 m/s. C) 1.9 m/s. D) 2.3 m/s. E) 2.5 m/s.

Physics & Space Science

If you feel a centrifugal force pulling you to the outside of a rotating circular wall:

a. you are correct about what is happening. b. the circular wall actually is pushing on you. c. you are experiencing a linear force. d. the centripetal force inward balances the centrifugal force outward, and you feel no net force. e. you are only experiencing half of what is happening; you are being pulled to the outside of the circle and the outside of the circle is also pushing on you.

Physics & Space Science

Electromagnetic radiation has the properties of

A) waves only B) particles only C) neither waves or particles D) both waves and particles

Physics & Space Science