Relative rate of
enzyme action
20 30 40
temperature (°c)
according to the graph, what condition is best for enzyme activity?
o
o
a. a temperature above 50°c
o
b. a temperature of 20°c
o
c. a temperature of 35°c
o
o
d. a temperature below 30°c

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

How does the entropy of steam compare to the entropy of ice?

The dominant wavelength of energy emitted by the sun is