Q1) Which one of the following is an SI base unit?
1) gram 2) newton 3) kilogram 4) slug 5) centimeter
Q2) Which one of the following pairs of units may not be added together, even after the appropriate unit conversions have been made?
1) grams and milligrams 2) miles and kilometers 3) kilograms and kilometers 4) slugs and kilograms 5) centimeters and yards
Q3) To be dimensionally consistent, distance [L], acceleration [L/T2], and time [T] must be related as follows: 1) distance = acceleration2 time2 2) distance = acceleration time 3) distance = acceleration time2 4) distance = acceleration2 time 5) none of the above Q4) The equation for the speed of sound in a gas states that v= g kB T/ m . Speed v is in m/s, is a dimensionless constant, temperature T is in kelvins (K), and mass m is in kg. What are the units of Boltzmann’s constant, kB?
2 2 1) kgm s K 2 -2 -1 2) kgm s K -1 -2 2 3) kg m s K 4) kgm/s 2 -2 5) kgm s
Q5) During a short interval of time the speed v in m/s of an automobile is given by v = at2 + bt3, where the time t is in seconds. The units of a and b are respectively:
1) ms2; ms4 2) s3/m; s4/m 3) m/s2; m/s3 4) m/s3; m/s4 5) m/s4; m/s5
Q6) If x = ½ at2, with meters the units of x, and seconds the units of t, what are the units of a?
1) m 2) s2 3) m/s2 4) s2/m 2 5) ms Q7) Which one of the following is the longest length?
1) 100 meters 2) 104 millimeters 3) 107 nanometers 4) 102 centimeters 5) 105 micrometers
Q8) A light year is the distance light travels in a year. If the speed of light is c = 3.00 108 m/s, how many meters are there in a light year? Use 365 days/year, 24 hours/day, 60 minutes/hour, 60 seconds/minute and 2.54 cm/inch.
1) 1.58 1015 2) 3.94 1014 3) 8.24 1014 4) 3.72 1015 5) 9.46 1015
Q9) The surface area of a lake has an area of 15.5 km2. What is the area of the lake in m2? 1) 1.55 103 m2 2) 1.55 104 m2 3) 1.55 106 m2 4) 1.55 107 m2 5) 1.55 108 m2 Q10) A sphere with a radius of 1.7 cm has a volume of:
1) 2.1 105 m3 2) 9.1 104 m3 3) 3.6 103 m3 4) 0.11 m3 5) 21 m3
Q11) A right circular cylinder with a radius of 2.3 cm and a height of 1.4 m has a volume of: 1) 23 m3 2) 0.23 m3 3) 9.3 10-3 m3 4) 2.3 10-3 m3 5) none of the above
Q12) Convert 55 mi/hr to m/s.
1) 123 m/s 2) 0.015 m/s 3) 88 m/s 4) 25 m/s 5) none of the above Q13) By what factor does the volume of a sphere increase if the radius is tripled? 1) 3 2) 6 3) 9 4) 12 5) 27
Q14) By what factor larger is a 12 inch pizza than a 10 in pizza? 1) 0.69 2) 0.83 3) 1.0 4) 1.2 5) 1.4
Q15) A beach ball has been partially deflated. If enough air is added to increase its radius by 5%, its volume
1) decreases by a factor of 0.95. 2) increases by a factor of 1.05. 3) increases by a factor of 1.10. 4) increases by a factor of 1.16. 5) none of the above Q16) Which one of the following answers would give the correct number of significant figures when the following masses are added together: 3.6 kg, 113 kg, and 4.19 kg?
1) 121 kg 2) 120.79 kg 3 3) 120.8 × 103 kg 4) 120.8 kg 5) 1.20 × 102 kg