(a) the volume flow rate in an artery supplying the brain is 3.4 x 10-6 m3/s. if the radius of the artery is 5.6 mm, determine the average blood speed.(b) find the average blood speed as a constriction in the artery if the constriction reduces the radius by a factor of 2. assume that the volume flow rate is the same as that in part (a).

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending