Make sure you start your student ID field with Fill in test form A on the lower

Question

Make sure you start your student ID field with Fill in test form A on the lower right hand corner ofthe Scartron·heat 1. Which of the following has three significant figures A) 1.00081 kg B) 8.060 ×10,1 m C)30500 cm D)305.0cm E)00500 mm 2. The average density of blood is 1.06× 103 kgms. If you-e mass of blood have you donated, in grams? (1 pt-½ L, 1 L-1000 cm) A) 5.30 g B) 0.530 g C) 5.30 x10' g D) 5.30 x10g E) 530 g pint ofblood to the Red Cross, wh 3. If you run a complete loop around an outdoor track (400 m) in 100 s, your average speed is A) 0.25 m's B) Zero C) 40,000 m/s D) 4 m/s E) 8 m/s 4. A motorist travels for 3.0 h at 80 km/h and 4.0h at 60 km/h. What is her average speed for the trip? A) 74 km/h B) 140 km/h C) 70 km/h D) 69 km/h E) 73 km/h 5. A jet fighter plane is launched from a catapult on an aircraft carrier. It reaches a speed of 24 m/s at the end of the catapult, and this requires 2 s. Assuming the acceleration is constant, what is the length of the catapult? A) 16 m B) 66 m C) 24 m D) 42 m E) 84 m 6. A bullet shot straight up returns to its starting in 10 s. Its initial speed was A) 98 m/s B) 45 m/s C) 9.8 m/s D) 24.5 m/s E) 49 m/s

Explanation / Answer

1. E) 0.0500 mm

2. 1060/2 = 530 g  

3 v= d/t = 400/100 = 4 m/s  

4. v= total distance /total time
= (240 +240)/(3+4) = 480/7 = 69 km/hr

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