Question 1

Which of the following is the value for the product of (1.362 × 105)(8.5 × 106), with the correct number of significant figures?

Accepted Answer

A) 1.1577 × 1012 
B) 1.158 × 1012 
C) 1.16 × 1012 
D) 1.2 × 1012 
A) 1.1577 × 1012 
B) 1.158 × 1012 
C) 1.16 × 1012 
D) 1.2 × 1012

Question 2

The calculator can hold only a few significant digits. When adding a set of positive numbers of widely varying magnitude on a calculator, in order to get the result with the highest precision, one should start at the largest number and add successively smaller ones.

Accepted Answer

A) True 
 B)False

Question 3

In the expression   where x has units metre (m), and vf and v0 have units m/s, what are the units for P?

Accepted Answer

A) m/s 
B) m 
C) m/s2 
D) no units 
A) m/s 
B) m 
C) m/s2 
D) no units

Question 4

Some astrologers claim that the gravitational influence of Mars can affect a child during birth. Gravitational force is linearly proportional to the masses of two bodies and decreases with the square of the distance between those bodies. Compare the influence of Mars (at a distance is 7.8 × 107 km from Earth) and a 70 kg doctor at a distance of 0.1 m, on a 3 kg baby. The mass of Mars is 6.42 × 1023 kg, and the universal gravitational constant is G = 6.67300 × 10-11 m3 kg-1s-2.

Accepted Answer

The doctor has 66 ti

Question 5

The masses of the human brain and body are related as massbrain is proportional to (massbody)0.68. Find the brain mass of a dolphin:
(a) if we assume that the dolphin is as intelligent as a human, and
(b) if we assume that it is as intelligent as a chimpanzee. Compare your results to the real value from the table and draw a conclusion about its intelligence ranking.

Accepted Answer

A bottlenose dolphin is less intelligent

Question 6

Which of the following units is a fundamental unit in the SI?

Accepted Answer

A) kilometre (km) 
B) kilogram (kg) 
C) gram (g) 
D) newton (N) 
A) kilometre (km) 
B) kilogram (kg) 
C) gram (g) 
D) newton (N)

Question 7

The speed of light is 3 × 108 m/s. The distance between Earth and the Sun is roughly 150 million kilometres. How long does it take for light to travel from the Sun to Earth? Express the result in seconds, minutes, hours, and days. Which unit is most appropriate?

Accepted Answer

500 seconds = 8.3 minutes = 0.

Question 8

Average human heartbeat is 75/minute. How many heartbeats has a 20-year-old student had since birth?

Accepted Answer

around 4 × 10⁷ per year; around

Question 9

Hooke's law for restoring the force of an oscillating system is F = -kx. If F is a force (unit N) and x is displacement (unit m), then the unit of the constant k is kg m2/s2.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following measurements has the highest precision?

Accepted Answer

A) the height of the classroom wall (around 300 cm) with uncertainty of 3 cm 
B) the depth of a canyon (around 1800 m) with uncertainty of 15 m 
C) the thickness of human hair (0.0001 m) with uncertainty of 0.00003 m 
D) the mass of 1 kg with the uncertainty of 0.005 g 
A) the height of the classroom wall (around 300 cm) with uncertainty of 3 cm 
B) the depth of a canyon (around 1800 m) with uncertainty of 15 m 
C) the thickness of human hair (0.0001 m) with uncertainty of 0.00003 m 
D) the mass of 1 kg with the uncertainty of 0.005 g

Question 11

When creating a model to explain a certain physical concept, what are observations and collected data most useful for?

Accepted Answer

A) making predictions 
B) proving that the model is correct without a doubt 
C) testing predictions made by the model 
D) generating catalogues 
A) making predictions 
B) proving that the model is correct without a doubt 
C) testing predictions made by the model 
D) generating catalogues

Question 12

You are measuring your weight on a scale.
(a) You are measuring your weight on a digital scale which can even show one decimal. The measurement shows 120.7 lb. Within what limits is your true weight likely to be?
(b) You are measuring your weight on another type of scale that has a known uncertainty of ±0.5 lb and shows 121 lb. Within what limits is your true weight likely to be?

Accepted Answer

(a) The limits are 120.65 lb and just un

Question 13

Which of the following numbers has the highest precision?

Accepted Answer

A) 6 × 10-8 m3 
B) 1.200008 
C) 12.534 
D) 2.38675 × 109 m3 
A) 6 × 10-8 m3 
B) 1.200008 
C) 12.534 
D) 2.38675 × 109 m3

Question 14

The flow rate of a fluid is expressed as a velocity of fluid multiplied by the cross-sectional area of the pipe (vA). Assume that the pipe is a blood vessel with circular cross-sectional area calculated as A = ðr2, where r is radius. In a continuous flow rate, where v1A1 = v2A2, what is the change of the velocity of blood if a blood vessel with radius r1 reduced its radius by a factor of 2 to r2 = r1/2?

Accepted Answer

A) v2 = (1/4)v1 
B) v2 = 2v1 
C) v2 = 4v1 
D) v2 = (1/2)v1 
A) v2 = (1/4)v1 
B) v2 = 2v1 
C) v2 = 4v1 
D) v2 = (1/2)v1

Question 15

Calculate both the sum of and the difference between the following two numbers: 1.04 × 10-5 m and 7.7 × 10-7 m. Express your results using correct units, number of significant digits, and scientific notation.

Accepted Answer

The sum is 1.12 × 10^-5 m; the di

Question 16

The largest blue whale ever measured weighed around 420000 pounds (lb). The SI unit for weight is the newton (N), and one pound (1 lb)   4.5 N. Which of the following values represents the mass of the whale in SI units? Note: weight = mass × g, where g = 9.8 m/s2.

Accepted Answer

A) 1.9 ×105g 
B) 1.9 ×105 kg 
C) 1.9 ×107g 
D) 1.9 ×107 kg 
A) 1.9 ×105g 
B) 1.9 ×105 kg 
C) 1.9 ×107g 
D) 1.9 ×107 kg

Question 17

In creating a model that would explain a certain physical concept, observations and collected data are most useful for proving that the model is a true representation of a concept.

Accepted Answer

A) True 
 B)False

Question 18

Numbers 0.025 and 25 have the same number of significant figures.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is the value for (6.28 ÷ 0.21 × 1125), with the correct number of significant figures?

Accepted Answer

A) 33640 
B) 33642.871428 
C) 33643 
D) 34000 
A) 33640 
B) 33642.871428 
C) 33643 
D) 34000

Question 20

How many significant figures are in 20006?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Exam 1: Physics and the Life Sciences

Which of the following is the value for the product of (1.362 × 105)(8.5 × 106), with the correct number of significant figures?

The calculator can hold only a few significant digits. When adding a set of positive numbers of widely varying magnitude on a calculator, in order to get the result with the highest precision, one should start at the largest number and add successively smaller ones.

In the expression where x has units metre (m), and vf and v0 have units m/s, what are the units for P?

Which of the following units is a fundamental unit in the SI?

The speed of light is 3 × 108 m/s. The distance between Earth and the Sun is roughly 150 million kilometres. How long does it take for light to travel from the Sun to Earth? Express the result in seconds, minutes, hours, and days. Which unit is most appropriate?

Average human heartbeat is 75/minute. How many heartbeats has a 20-year-old student had since birth?

Hooke's law for restoring the force of an oscillating system is F = -kx. If F is a force (unit N) and x is displacement (unit m), then the unit of the constant k is kg m2/s2.

Which of the following measurements has the highest precision?

When creating a model to explain a certain physical concept, what are observations and collected data most useful for?

Which of the following numbers has the highest precision?

Calculate both the sum of and the difference between the following two numbers: 1.04 × 10-5 m and 7.7 × 10-7 m. Express your results using correct units, number of significant digits, and scientific notation.

The largest blue whale ever measured weighed around 420000 pounds (lb). The SI unit for weight is the newton (N), and one pound (1 lb) 4.5 N. Which of the following values represents the mass of the whale in SI units? Note: weight = mass × g, where g = 9.8 m/s2.

In creating a model that would explain a certain physical concept, observations and collected data are most useful for proving that the model is a true representation of a concept.

Numbers 0.025 and 25 have the same number of significant figures.

Which of the following is the value for (6.28 ÷ 0.21 × 1125), with the correct number of significant figures?

How many significant figures are in 20006?

Kinematics

Forces

Newtons Laws

Centre of Mass and Linear Momentum

Torque and Equilibrium

Energy and Its Conservation

Gases

Thermal Physics

Transport of Energy and Matter

Static Fluids

Fluid Flow

Elasticity and Vibrations

Waves

Sound

Electric Force and Field

Electric Energy and Potential

The Flow of Charges

The Atom

Magnetism and Electromagnetic Waves

Geometric Optics

The Atomic Nucleus

Diagnostic Ultrasound Imaging

Diagnostic X-Ray Imaging

Diagnostic Nuclear Medicine Imaging

Magnetic Resonance Imaging

Radiation Therapy

Filters

Which of the following is the value for the product of (1.362 × 10⁵)(8.5 × 10⁶), with the correct number of significant figures?

In the expression where x has units metre (m), and v_f and v₀ have units m/s, what are the units for P?

The speed of light is 3 × 10⁸ m/s. The distance between Earth and the Sun is roughly 150 million kilometres. How long does it take for light to travel from the Sun to Earth? Express the result in seconds, minutes, hours, and days. Which unit is most appropriate?

Hooke's law for restoring the force of an oscillating system is F = -kx. If F is a force (unit N) and x is displacement (unit m), then the unit of the constant k is kg m²/s².

Calculate both the sum of and the difference between the following two numbers: 1.04 × 10^-5 m and 7.7 × 10^-7 m. Express your results using correct units, number of significant digits, and scientific notation.

The largest blue whale ever measured weighed around 420000 pounds (lb). The SI unit for weight is the newton (N), and one pound (1 lb) 4.5 N. Which of the following values represents the mass of the whale in SI units? Note: weight = mass × g, where g = 9.8 m/s².