For an elastic, isotropic collision in cm-system occurring with a heavy nucleus a) perform the limited expansion of ε and ξ in powers of 1/a; and b) evaluate the error in ξ when the exponential law for the gain in lethargy between 0 and ε is replaced by a uniform law between the same limits. this approximation is sometimes made, for instance, when calculating the strength of resonant absorption by heavy nuclides

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

What is the role of lenses in microscopy?