A football coach starts at the 10-yard line (A) and walks to the 40-yard line (B). He turns around and walks to the 0-yard line (C). He turns around again and walks back to the 50-yard line (D). He turns around once more and walks back to the 25-yard line (E), thus completing his
10 minutes of pacing.
West
East
A
B
GA
D+
-10
0
30
20
30
40
50
Position (yds)
The coach's average speed is
a. 1.5 y/min, East b. 1.5 y/min, West c. 1.5 y/min
6.0 y/min, West i. 6.0 y/min j. 8.5 y/min, East
West o. 14.5 y/min
p. none of these
d. 5.0 ylmin, East
k. 8.5 y/min, West
e. 5.0 y/min, West
1. 8.5 y/min
f. 5.0 y/min
g. 6.0 y/min, East h.
m. 14.5 y/min, East n. 14.5 yd/min,

1. the materials manager for a billiard ball maker must periodically place orders for resin, one of the raw materials used in producing billiard balls. she knows that manufacturing uses resin at a rate of 50 kilograms each day, and that it costs $.04 per day to carry a kilogram of resin in inventory. she also knows that the order costs for resin are $100 per order, and that the lead time for delivery is four (4) days.2. at what point should resin be reordered? a. 0 kilograms remainingb. 50 kilograms remainingc. 200 kilograms remainingd. 400 kilograms remaininge. 500 kilograms remaining3. if order size was 1,000 kilograms of resin, what would be the length of an order cycle? a. 0.05 daysb. 4 daysc. 16 daysd. 20 dayse. 50 days4. if the order size was 1,000 kilograms of resin, what would be the average inventory level? a. 50 kilogramsb. 200 kilogramsc. 500 kilogramsd. 800 kilogramse. 1,000 kilograms5. if the order size was 1,000 kilograms of resin, what would be the daily total inventory costs, excluding the cost of the resin? a. $5b. $10c. $20d. $25e. $40

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".

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?