Una molla di costante elastica 57 N/m è lunga 15 cm. Appendendo alla molla un cilindro di metallo la molla si allunga fino a 21 cm.
a) Disegna la molla scarica e la molla con il peso agganciato.
b) Inserisci i dati nel disegno.
c) Quanto vale l'allungamento della molla?
d) Quanto vale il peso del cilindro?
e) Di quanto si allunga la molla se appendiamo un peso di 9,5 N?

Aparticle moves in a circle 1.50 m in radius . through what angle in radians does it rotate if it moves through an arc length of 2.50m? what is the angle in degrees?

An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?