Question

art A: MULTIPLE CHOICE SECTION: 25 Questions 1. A measurement of 35.6 grams is the same as D. 356 mg A. 0.356 kg. B. 0.0356 kg C. 3.56 kg 2. A statue's height is 65.5 in. Its height in cm is therefore (1 in A. 166 cm D. 25.8 cm B. 128.9 cm C. 65.5 cm m. 3. Dry air has density of 1.3 kg/m'. A classroom has dimensions 8mx What is the mass of air in the classroom? A. zero, air is massless B. 1.3 kg C. 23.4 kg D. 125 kg 4. An object transported from the Earth to the Moon has A. the same mass, but different weight. C. the same mass and the same weight. B. the same weight, but different mass. D. a different mass and a different weight. 5. If an object moves with constant velocity, it follows that: A. its speed is constant. C. it covers equal distances in equal time intervals B. its direction is constant. D. all of these are true. 6. At the turning point of an object in 1 dimension, we can write: A. displacement B. velocity = 0 C. acceleration-0 D. Both B &C 7. The slope at a point on a position vs. time graph gives us the instantaneous A position B. displacement @velocity D. acceleration 8. The slope at a point on a yelocity vs. time graph gives us the instantaneous A. position B. displacement C. velocity D. acceleration If an object has a non-zero acceleration, its position vs. time graph must I A. flat 9. C. curved D. zero B increasing On a road trip, a family drives 300 km in 4 hr, then stops for a 2 hr lun hen drives 60 km in 1.5 hr. What was their average speed in km/h for the 10. C. 38.3 km/bh D. 252 km/h. ,48.0 km/h B. 57.5 km/h

Answer 1

B 1 kg = 1000 g Therefore 1 g = 1/1000 kg 35 . 6 g = 35 . 6/1000 kg = 0 . 0356 kg 2) A 1 in = 2 . 54 cm 65 . 5 in = (65 . 5 times 2 . 54) cm = 166 . 37 cm 3) B Density = mass/volume = 1 . 3 kg/m^3 volume = (8 times 4 times 3) m^3 = 96 m^3 Therefore mass = density times volume = 1 .3 kg/m^2 times 96 m^2 = 124 . 8 kg almostequalto 125 kg 4) A weight = mass times gravity = mg mass = content of matter Therefore since �g� is different of earth and moon, so weight is different but mass is same . 5) D velocity = distance/time = constant =