Questions and Answers of Introduction to Physics

1. Physics is a field of study that governs(a) How the planets orbit the sun.(b) The rate at which blood flows through a person’s veins.(c) How quickly a helium balloon will rise into the air.(d)
1. Who is considered to be the first true physicist and what did he do to deserve this recognition in scientific history?2. Explain the difference between science and technology. Are the two fields
Give the metric prefix for each value.1. 10002. 0.013. 1004. 0.15. 0.0016. 107. 1,000,0008. 0.000001
Give the metric symbol, or abbreviation, for each prefix.1. Hecto 2. Kilo 3. Milli 4. Deci5. Mega 6. Deka 7. Centi 8. Micro
Write the abbreviation for each quantity.1. 135 Millimetres 2. 83 Dekagrams 3. 28 Kilolitres4. 52 Centimetres 5. 49 Centigrams 6. 85 Milligrams7. 75 Hectometres 8. 15 Decilitres
Write the SI unit for each abbreviation.1. 24 m2. 185 L3. 59 g4. 125 kg5. 27 mm6. 25 dL7. 45 dam8. 27 mg9. 26 Mm10. 275 mg11. The basic metric unit of length is _____.12. The basic unit of mass is
Write each number in scientific notation.1. 326 2. 798 3. 26504. 14,500 5. 826.4 6. 24.977. 0.00413 8. 0.00053 9. 6.4310. 482,300 11. 0.000065 12. 0.0022413. 540,000 14. 1,400,000 15. 0.000007516.
Write each number in decimal form.1. 8.62 x 104 2. 8.67 x 102 3. 6.31 x 10–44. 5.41 x 103 5. 7.68 x 10–1 6. 9.94 x 1017. 7.77 x 108 8. 4.19 x 10–6 9. 6.93 x 10110. 3.78 x 10–2 11. 9.61 x 104
Which unit is longer?1. 1 metre or 1 centimetre2. 1 metre or 1 millimetre3. 1 metre or 1 kilometre4. 1 centimetre or 1 millimetre5. 1 centimetre or 1 kilometre6. 1 millimetre or 1 kilometre
Which metric unit (km, m, cm, or mm) would you use to measure the following?1. Length of a wrench 2. Thickness of a saw blade3. Height of a barn 4. Width of a table5. Thickness of a hypodermic
Fill in each blank with the most reasonable metric unit (km, m, cm, or mm).1. Your car is about 6 _____ long.2. Your pencil is about 20 _____ long.3. The distance between New York and San Francisco
Fill in each blank.1. 1 km = _____ m 2. 1 mm = _____ m 3. 1 m = _____ cm4. 1 m = _____ hm 5. 1 dm = _____ m 6. 1 dam =_____ m7. 1 m = _____ mm 8. 1 m = _____ dm 9. 1 hm = _____ m10. 1 cm = _____ m
1. Change 250 m to cm. 2. Change 250 m to km.3. Change 546 mm to cm. 4. Change 178 km to m.5. Change 35 dm to dam. 6. Change 830 cm to m.7. Change 75 hm to km. 8. Change 375 cm to mm.9. Change 7.5 mm
1. The length of a connecting rod is 7 in. What is its length in centimetres?2. The distance between two cities is 256 mi. Find this distance in kilometres.3. Change 5.94 m to feet. 4. Change 7.1 cm
How many reamers, each 20 cm long, can be cut from a bar 6 ft long, allowing 3 mm for each saw cut?
If 214 pieces each 47 cm long are to be turned from 1/4-in. round steel stock with 1/8 in of waste allowed on each piece, what length (in metres) of stock is required?
Find the area of each figure.1.2.3.4.5. Find the cross-sectional area of the I-beam.6. Find the largest cross-sectional area of the figure.7. Find the volume in each figure.8.9.10.
Which unit is larger?1. 1 litre or 1 centilitre2. 1 millilitre or 1 kilolitre3. 1 cubic millimetre or 1 cubic centimetre4. 1 cm3 or 1 m35. 1 square kilometre or 1 hectare6. 1 mm2 or 1 dm2
Which metric unit (m3, L, mL, m2, cm2, ha) would you use to measure the following?1. Oil in your car’s crankcase. 2. Water in a bathtub.3. Floor space in a house. 4. Cross section of a piston.5.
Fill in the blank with the most reasonable metric unit (m3, L, mL, m2, cm2, ha).1. Go to the store and buy 4 _____ of root beer for the party.2. I drank 200 _____ of orange juice for breakfast.3.
Fill in each blank.1. 1 L = _____ mL 2. 1 kL = _____ L 3. 1 L = _____ daL4. 1 L = _____ kL 5. 1 L = _____ hL 6. 1 L = _____ dL7. 1 daL = _____ L 8. 1 mL = _____ L 9. 1 mL = _____ cm310. 1 L = _____
1. Change 7500 mL to L. 2. Change 0.85 L to mL.3. Change 1.6 L to mL. 4. Change 9 mL to L.5. Change 275 cm3 to mm3. 6. Change 5 m3 to cm3.7. Change 4 m3 to mm3. 8. Change 520 mm3 to cm3.9. Change 275
1. How many ft2 are in a rectangle 15 m long and 12 m wide?2. Change 108 in2 to ft2. 3. How many in2 are in 51 cm2?4. How many in2 are in a square 11 yd on a side?5. How many m2 are in a doorway
1. The volume of a casting is 38 in3. What is its volume in cm3?2. How many castings of 14 cm3 can be made from a 12-ft3 block of steel?3. Find the lateral surface area of the figure in Problem 9.4.
Which unit is larger?1. 1 gram or 1 centigram2. 1 gram or 1 milligram3. 1 gram or 1 kilogram4. 1 centigram or 1 milligram5. 1 centigram or 1 kilogram6. 1 milligram or 1 kilogram
Which metric unit (kg, g, mg, or metric ton) would you use to measure the following?1. Your mass 2. An aspirin3. A bag of lawn fertilizer 4. A bar of hand soap5. A trainload of grain 6. A sewing
Fill in each blank with the most reasonable metric unit (kg, g, mg, or metric ton).1. A newborn’s mass is about 3 _____.2. An elevator in a local department store has a load limit of 2000 _____.3.
1. Postage rates for letters would be based on the _____.2. A heavyweight boxing champion has a mass of 93 _____.3. A nickel has a mass of 5 _____.4. My favorite spaghetti recipe calls for 1 _____ of
Fill in each blank.1. 1 kg = _____ g 2. 1 mg = _____ g 3. 1 g = _____ cg4. 1 g = _____ hg 5. 1 dg = _____ g 6. 1 dag = _____ g7. 1 g = _____ mg 8. 1 g = _____ dg 9. 1 hg = _____ g10. 1 cg = _____ g
1. Change 575 g to mg. 2. Change 575 g to kg.3. Change 650 mg to g. 4. Change 375 kg to g.5. Change 50 dg to g. 6. Change 485 dag to dg.7. Change 30 kg to mg. 8. Change 4 metric tons to kg.9. Change
1. The weight of a car is 3500 lb. Find its weight in newtons.2. A certain bridge is designed to support 150,000 lb. Find the maximum weight that it will support in newtons.3. Jose weighs 200 lb.
Fill in each blank.1. The basic metric unit of time is _____. Its abbreviation is _____.2. The basic metric unit of mass is _____. Its abbreviation is _____.3. The common metric unit of weight is
Which is larger?1. 1 second or 1 millisecond 2. 1 millisecond or 1 nanosecond3. 1 ps or 1 μs 4. 1 ms or 1 μs
Write the abbreviation for each unit.1. 8.6 microseconds 2. 45 nanoseconds 3. 75 picoseconds4. Change 345 μs to s. 5. Change 1 h 25 min to min.6. Change 4 h 25 min 15 s to s. 7. Change 7 x 106 s to
Determine the accuracy (the number of significant digits) of each measurement.1. 536 ft2. 307.3 mi3. 5007 m4. 5.00 cm5. 0.0070 in.6. 6.010 cm7. 8400 km8. 3000 ft9. 187.40 m10. 500 g
Determine the accuracy (the number of significant digits) of each measurement.1. 0.00700 in.2. 10.30 cm3. 376.52 m4. 3.05 mi5. 4087 kg6. 35.00 mm7. 0.0160 in.8. 370 lb9. 4000 N10. 5010 ft3
Determine the accuracy (the number of significant digits) of each measurement.1. 7 N2. 32,000 tons3. 70.00 m24. 0.007 m5. 2.4 x 103 kg6. 1.20 x 10–5 ms7. 3.00 x 10–4 kg8. 4.0 x 106 ft9. 5.106 x
Determine the precision of each measurement.1. 536 ft 2. 307.3 mi 3. 5007 m4. 5.00 cm 5. 0.0070 in. 6. 6.010 cm7. 8400 km8. 3000 ft9. 187.40 m10. 500 g
Determine the precision of each measurement.1. 0.00700 in.2. 10.30 cm3. 376.52 m4. 3.05 mi5. 4087 kg6. 35.00 mm7. 0.0160 in.8. 370 lb9. 4000 N10. 5010 ft3
Determine the precision of each measurement.1. 7 N2. 32,000 tons 3. 70.00 m2 4. 0.007 m5. 2.4 x 103 kg 6. 1.20 x 10–5 ms 7. 3.00 x 10–4 kg8. 4.0 x 106 ft 9. 5.106 x 107 kg 10. 1 x 10–9 m
In each set of the measurements, find the measurement that is(a) The most accurate(b) The most precise.1. 15.7 in.; 0.018 in.; 0.07 in.2. 368 ft; 600 ft; 180 ft3. 0.734 cm; 0.65 cm; 16.01 cm4. 3.85
In each set of measurements, find the measurement that is (a) The least accurate (b) The least precise.1. 16.4 in.; 0.075 in.; 0.05 in. 2. 475 ft; 300 ft; 360 ft3. 27.5 m; 0.65 m; 12.02 m 4. 5.7 kg;
Use the rules for addition of measurements to add each set of measurements.1.3847 ft5800 ft4520 ft2. 8560 m84,000 m18,476 m12,500 m3. 42.8 cm16.48 cm1.497 cm 12.8 cm 9.69
Use the rules for subtraction of measurements to subtract each second measurement from the first.1. 2876 kg2400 kg2. 14.73 m9.378 m3. 45.585 g 4.6 g4. 34,500 kg 9,500 kg5. 4200 km
Use the rules for multiplication of measurements to multiply each set of measurements.1. (125 m)(39 m)2. (470 ft)(1200 ft)3. (1637 km)(857 km)4. (9100 m)(600 m)5. (18.70 m)(39.45 m)6. (565 cm)(180
Use the rules for division of measurements to divide.1. 360 ft3 ÷ 12 ft22. 125 m2 ÷ 3.0 m3. 275 cm2 ÷ 90.0 cm4. 185 mi ÷ 4.5 h
Use the rules for multiplication and division of measurements to find the value of each of the following.1. (18 ft) (290 lb)/4.6 s2. (18.5 kg) (4.65 m)/19.5 s3. 4500 mi/12.3 h4. 48.9 kg (1.5 m) (3.25
Give the metric prefix for each value:1. 1000 2. 0.001Give the metric symbol, or abbreviation, for each prefix:3. Micro 4. MegaWrite the abbreviation for each quantity:5. 45 milligrams 6. 138
Fill in each blank (round to three significant digits when necessary):1. 250 m = _____ km2. 850 mL = _____ L3. 5.4 kg = _____ g 4. 0.55 s = _____ μs5. 25 kg = _____ g 6. 75 μs = _____ ns7. 275 cm2
Determine the accuracy (the number of significant digits) in each measurement:1. 5.08 kg2. 20,570 lb3. 0.060 cm4. 2.00 x 10–4 s
Determine the precision of each measurement:1. 30.6 ft2. 0.0500 s3. 18,000 mi4. 4 x 105 N
For each set of measurements, find the measurement that is(a) The most accurate.(b) The least accurate.(c) The most precise.(d) The least precise.1. 12.00 m; 0.150 m; 2600 m; 0.008 m2. 208 L; 18,050
Use the rules of measurements to add the following measurements:1. 0.0250 s; 0.075 s; 0.00080 s; 0.024 s2. 2100 N; 36,800 N; 24,000 N; 14.5 N; 470 NUse the rules for multiplication and division of
What are the basic metric units for length, mass, and time?(a) Foot, pound, hour(b) Newton, litre, second(c) Metre, kilogram, second(d) Mile, ton, day
1. When a value is multiplied or divided by 1, the value is(a) Increased.(b) Unchanged.(c) Decreased.(d) None of the above.2. The lateral surface area of a solid is(a) Always equal to total surface
Cite three examples of problems that would arise in the construction of a home by workers using different systems of measurement.
1. Why is the metric system preferred worldwide to the U.S. system of measurement?2. List a very large and a very small measurement that could be usefully written in scientific notation.3. When using
List three things that might conveniently be measured in millilitres.
1. How do weight and mass differ?2. What is the basic metric unit of weight?3. A microsecond is one-_____ of a second.4. Why must we concern ourselves with significant digits?5. Can the sum or
You run a landscaping business and know that you want to charge $50.00 to mow a person’s lawn whose property is 100 ft x 200 ft. If the house dimensions take up a 35.0 ft x 80.0 ft area, how much
A room that measures 10.0 ft wide, 32.0 ft long, and 8.00 ft high needs a certain amount of air pumped into it per minute to keep the air quality up to regulations. If the room needs completely new
Instead of using a solid iron beam, structural engineers and contractors use I-beams to save materials and money. How many I-beams can be molded from the same amount of iron contained in the solid
A shipping specialist at a craft store needs to pack Styrofoam balls of radius 4.00 in. into a 1.40 ft x 2.80 ft x 1.40 ft rectangular cardboard container. What is the maximum number of balls that
A crane needs to lift a spool of fine steel cable to the top of a bridge deck. The type of steel in the cable has a density of 7750 kg/m3. The maximum lifting mass of the crane is 43,400 kg.(a) Given
Solve each formula for the quantity given.1. v = s/t for s2. a = v/t for v3. w = mg for m4. F = ma for a 5. E = IR for R6. V = lwh for w7. Ep = mgh for g8. Ep = mgh for h9. v2 = 2gh for h10. XL =
Solve each formula for the quantity given.1. P = W/t for W2. p = F/A for F3. P = W/t for t4. p = F/A for A5. Ek = ½ mv2 for m6. Ek = ½ mv2 for v27. W = FS for s8. vf = vi + at for a9. V = E – Ir
Solve each formula for the quantity given.1. R = π/P for P2. R = kL/d2 for L3. F = 9/3C + 32 for C4. C = 5/9 (F – 32) for F5. XC = I/2πfC for f6. R = ρL/A for L7. RT = R1 + R2 + R3 + R4, for
Solve each formula for the quantity given.1. vavg = ½ (vf + vi) for vi2. 2a (s – si) = v2 – v2i for a3. 2a (s – si) = v2 – v2i for s4. Ft = m (V2 – V1) for V15. Q = I2Rt/J for R6. x = xi +
For each formula,(a) Solve for the indicated letter and then(b) Substitute the given data to find the value of the indicated letter.Follow the rules of calculations withmeasurements.
For each formula, (a) solve for the indicated letter and then (b) substitute the given data to find the value of the indicated letter.Follow the rules of calculations withmeasurements.
Use the problem-solving method to work each problem. (Here, as throughout the text, follow the rules for calculations with measurements.)1. Find the volume of the box in Fig. 2.3.2. Find the volume
1. Find the area of a right triangle that has legs of 4.00 cm and 6.00 cm.2. Find the length of the hypotenuse of the right triangle in Problem 11.3. Find the cross-sectional area of a pipe with
1. A wheel 30.0 cm in diameter moving along level ground made 145 complete rotations. How many metres did the wheel travel?2. The side of the silo in Problems 19 and 20 needs to be painted. If each
1. Find the volume of the storage bin shown in Fig. 2.10.2. The maximum cross-sectional area of a spherical propane storage tank is 3.05 m2. Will it fit into a 2.00-m-wide trailer?3. How many cubic
1. Solve F = ma for (a) m and (b) a. 2. Solve v = √2gh for h.3. Solve s = ½ (vf + vi) for vf. 4. Solve Ek = ½ mv2 for v.
1. Given P = a + b + c, with P = 36 ft, a = 12 ft, and c = 6 ft, find b.2. Given A = (a + b/2)h, with A = 210 m2, b – 16.0 m, and h = 15.0, find a.3. Given A = πr2, if A = 15.0 m2, find r.4. Given
1. A cone has a volume of 314 cm3 and radius of 5.00 cm. What is its height?2. A right triangle has a side of 41.2 mm and a side of 9.80 mm. Find the length of the hypotenuse.3. Given a cylinder with
1. The formula for the volume of a cylinder is V = Ï€r2h. If V = 2100 m3 and h = 17.0m, find r.2. The formula for the area of a triangle is A = Â½bh. If b = 12.3 m and A = 88.6 m2, find h.3.
1. A formula is(a) The amount of each value needed.(b) A solution for problems.(c) An equation usually expressed in letters and numbers.2. Subscripts are(a) The same as exponents.(b) Used to shorten
1. Why is reading the problem carefully the most important step in problem solving?2. How can making a sketch help in problem solving?3. What do we call the relationship between data that are given