Did you title your lab report?  did you state the purpose of the experiment?  did you state the question you posed before the experiment?  did you restate the hypothesis (or prediction) you formulated before the experiment?  did you list all variables and label the independent and dependent variables? did you indicate any controlled variables? materials and procedure

List one type of erosion and describe how it happens?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?