An object with a mass of 1.5kg changes its velocity from +15m/s to +22 during a time interval of 3.5 seconds. what impulse was delivered to the object a: 3.0 n•s b: 11 n•s c: 25 n•s d: 56 n•s

The energy released by a nuclear fusion reaction is produced when

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.

Ahypothetical metal has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.413 nm, 0.665 nm, and 0.876 nm, respectively. (a) if there are 8 atoms per unit cell and the atomic packing factor is 0.536, determine the atomic radius (in nm). (b) if the density is 3.99 g/cm3, calculate the metal's atomic weight (in g/mol).