y The sistarce light will travel in artain time 0 by a platinum har kept in the

Question

y The sistarce light will travel in artain time 0 by a platinum har kept in the National Hueau of Sand A) 45 B) less than 45 1) 90 1 The density of water is 1.00 groms/cm! What is the devnsity in kg/m 12) Which physical unit is a vekoxity? 13) Match kikzam to one od the following A) 1.00 A) -120 mi/s A 1 in 2.54cm C) 1000g 8)1.0010 C 1.00 10-1 D)1.00x10 1) 0000100 B)3211/s2 13 40 km, SW D) 10-9 14) If you rur, ^ complete hop arourul an outdoor trmk (400 m) in 300/s, your average D) 4.0km/h A) 40 mph 8) 0.40 m/s 40000m/s 15) A or travels at 40 km/h for 30 min and 60 km/h for 15 man. How far does it travel in this time A) 45 Am 8)37.5 km c3 35 km D) 28.4 km 1) 20 km A) one ) tws C) thre t7) A hall nhon, moving straight up a' 15 m/s Atome 'ime later i' i-talling downward m/s, what ww the magnitunde of its avenage velocity ovee this time eriol? 1) 22m/s D)7.5 m/s 13 15. m/ 18) Which of the following oen never be negative? B)stantaneous spred C) displaement D) avelenetion of gravity )a 2

Explanation / Answer

10)

In air resistance, angle for maximum rage = less than 45

11)

density = 1.00g/cm^3

1kg= 1000g => 1.0g = (1/1000)g = 10^-3 g

1m = 100cm => 1cm = (1/100)m = 10^-2 m

density = (10^-3kg)/(10^-2 m)^3 = (10^-3kg)/(10^-6m3) = 1.00*103 kg/m3

12)

Physical quantity in velocity = -120mi/s

13)

1kg = 1000 g

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