Scientists have studied two species of sand lizards, the Mojave fringe-toed lizard and the western zebra-tailed
lizard, to understand the extent to which the different
structure of the two species' toes is related to their
preferred habitats-fine sand for the Mojave lizard and
coarse sand for the zebra-tailed lizard. (Figure 1)
shows a somewhat simplified velocity-versus-time
graph for the Mojave fringe-toed lizard. Examine the maximum acceleration of the lizard in both m/s^2, and g’s. estimate it’s acceleration at t=150ms

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?