The pressure rise p associated with wind hitting a window of a building can be
estimated using the formula p = rho(v2
/2), where rho is density of air and v is the speed of the
wind. apply the grid method to calculate pressure rise for rho = 1.2 kg/m3
and v = 100 km/h.
(20%)
a. express your answer in pascals.
b. express your answer in meters of water column (m-h2o).

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.