An unstrained horizontal spring has a length of 0.31 m and a spring constant of 220 n/m. two small charged objects are attached to this spring, one at each end. the charges on the objects have equal magnitudes. because of these charges, the spring stretches by 0.022 m relative to its unstrained length. determine (
a. the possible algebraic signs and (
b. the magnitude of the charges.

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

What happens when you slowly pulled the carboard?