For a wave of wavelength 4 m and frequency 8 waves/sec., a. amplitude = 32 m.

b. amplitude = 0.5 m.

c. speed =32 m/sec.

d. speed = 2 m/sec.
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In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.