Alpha radiation is another type of radiation. alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. they have much less energy than either beta particles of gamma waves. suppose a geiger counter was placed 10 cm from an alpha emitter, and clicks were recorded for three minutes. based on the recorded data, predict the number of clicks you would detect on the far side of the aluminum shield.
a) 0 clicks
b) 2 clicks
c) 5 clicks
d) 10 clicks

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?