At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large compressed spring. the spring with force constant k = 40.0 n/cm and negligible mass rests on the frictionless horizontal surface. one end is in contact with a stationary wall. a sled and rider with total mass 70.0 kg are pushed against the other end, compressing the spring 0.375 m. the sled is then released with zero initial velocity. part a what is the sled’s speed when the spring returns to its uncompressed length?

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Which notation is used to represent an alpha particle? a. b. c. d.

The two required components for a generator are