Homework nr. 2 -
Due Tuesday, Oct. 19
1. (2 points) Write these values with the right prefixes:
0.008 m =
1.2 x 106 ) =
2. A block of 700 g is pulled from rest on a horizontal frictionless bench by a steady force Fand
travels 7.0 m in 3.5 s.
a) (2 points) What was the acceleration of the block?
b) (2 points) Calculate the value of the force.
3. A rocket has a mass of 900 kg.

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

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.

You can melt ice by applying pressure because the solid/liquid line has a slope.