The mass of the sun is 2.0 × 1030 kg,and the mass of a hydrogen atom is 1.67 × 10−27 kg.If we assume that the sun is mostly composed of hydrogen,how many atoms are there in the sun?

A) 1.2 × 1056 atoms B) 3.4 × 1056 atoms C) 1.2 × 1057 atoms D) 2.4 × 1057 atoms A) 1.2 × 1056 atoms B) 3.4 × 1056 atoms C) 1.2 × 1057 atoms D) 2.4 × 1057 atoms C

Suppose an equation relating position,x,to time,t,is given by x = b t3 + c t4,where b and c are constants.The dimensions of b and c are respectively:

A) T3,T4. B) 1/T3,1/T4. C) L/T3,L/T4. D) L2⋅T3,L2⋅T4. A) T3,T4. B) 1/T3,1/T4. C) L/T3,L/T4. D) L2⋅T3,L2⋅T4. C

A room in a house has a floor area of 140 ft2.Which of the following is most likely the approximate volume of the room?

A) 4.55 m3 B) 45.5 m3 C) 455 m3 D) 4550 m3 E) 13 m3 A) 4.55 m3 B) 45.5 m3 C) 455 m3 D) 4550 m3 E) 13 m3

If ϕ = 90° − θ,what is the value of sin2 ϕ + sin2 θ?

A) 0 B) 1 C) −1 D) The answer depends on θ. A) 0 B) 1 C) −1 D) The answer depends on θ.

Modern electroplaters can cover a surface area of 60.0 m2 with one troy ounce of gold (volume = 1.611 cm3).What is the thickness of the electroplated gold?

A) 2.69 × 10−8 m B) 1.35 × 10−9 m C) 1.79 × 10−6 m D) 5.38 × 10−7 m E) None of the above A) 2.69 × 10−8 m B) 1.35 × 10−9 m C) 1.79 × 10−6 m D) 5.38 × 10−7 m E) None of the above

For which of the values below is x > x7?

A) x = -2.0 B) x = 0 C) x = 1.0 D) x = 2.0 E) x = 4.0 A) x = -2.0 B) x = 0 C) x = 1.0 D) x = 2.0 E) x = 4.0

Exam 1: Introduction

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The mass of the sun is 2.0 × 10³⁰ kg,and the mass of a hydrogen atom is 1.67 × 10−²⁷ kg.If we assume that the sun is mostly composed of hydrogen,how many atoms are there in the sun?

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Suppose an equation relating position,x,to time,t,is given by x = b t³ + c t⁴,where b and c are constants.The dimensions of b and c are respectively:

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A right triangle has sides 10 m,5 m,and 11 m.The smallest angle of this triangle is nearest:

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A circle has an area of 4.0 m².A second circle has double the radius of the first.The area of the second circle is ____ times that of the first.

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Question 4

In mechanics,physicists use three basic quantities to derive additional quantities.Mass is one of the three quantities.What are the other two?

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Question 5

A room in a house has a floor area of 140 ft².Which of the following is most likely the approximate volume of the room?

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Question 6

Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit.If you are measuring an object with length between 6 and 7 cm,how many significant figures will result if you only use the part of the meter stick between the 1-cm and 9-cm positions?

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Question 7

A cement truck can pour 120 cubic yards of cement per hour.Express this in ft³/min.

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Question 8

The number 0.03 has how many significant figures?

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Question 9

Each edge of a cube has a length of 38.1 cm.What is the length of a diagonal of the cube going through the center of the cube?

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Question 10

When SI units are plugged into an equation,it is found that the units balance.Which of the following can we expect to be true for this equation?

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Question 11

In the text are the following conversion factors: i.1 mi = 1 609 m ii.1 m = 39.37 in. iii.1 ft = 30.48 cm iv.1 in.= 2.54 cm The 1 on the left hand side is assumed to have the same number of significant figures as the number on the right hand side of each of these equations.However,2 of these conversion factors are exact,and this means they have the equivalent of an unlimited number of significant figures when used in calculations.Which 2 are the exact conversion factors?

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Question 12

Calculate (0.73+0.071)(3.3 x 103), keeping only significant figures.

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Question 13

Since 1967 the standard definition for the second has been based on which of the following?

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Question 14

If ϕ = 90° − θ,what is the value of sin² ϕ + sin² θ?

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Question 15

There are other ways of expressing uncertainty besides significant figures.For example,suppose a quantity is known to have a value between 20.4 and 20.0,and our best estimate of the value is midrange at 20.2.We could write the number as 20.2 +/− 0.2 and say that the number has a 1% uncertainty.We would also say it has 3 significant figures.If we square a number with 1% uncertainty and 3 significant figures,what results?

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Question 16

Which one of the choices below represents the preferred practice regarding significant figures when adding the following: 14.4+13+55.12+2.774?

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Question 17

Modern electroplaters can cover a surface area of 60.0 m² with one troy ounce of gold (volume = 1.611 cm³).What is the thickness of the electroplated gold?

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Question 18

Water flows into a swimming pool at the rate of 7 gal/min.The pool is 16 ft wide,31 ft long and 8 ft deep.How long does it take to fill? (1 U.S.gallon = 231 cubic inches)

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Question 19

For which of the values below is x > x⁷?

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Question 20

Showing 1 - 20 of 60

Exam 1: Introduction

The mass of the sun is 2.0 × 1030 kg,and the mass of a hydrogen atom is 1.67 × 10−27 kg.If we assume that the sun is mostly composed of hydrogen,how many atoms are there in the sun?

Suppose an equation relating position,x,to time,t,is given by x = b t3 + c t4,where b and c are constants.The dimensions of b and c are respectively:

A right triangle has sides 10 m,5 m,and 11 m.The smallest angle of this triangle is nearest:

A circle has an area of 4.0 m2.A second circle has double the radius of the first.The area of the second circle is ____ times that of the first.

In mechanics,physicists use three basic quantities to derive additional quantities.Mass is one of the three quantities.What are the other two?

A room in a house has a floor area of 140 ft2.Which of the following is most likely the approximate volume of the room?

A cement truck can pour 120 cubic yards of cement per hour.Express this in ft3/min.

The number 0.03 has how many significant figures?

Each edge of a cube has a length of 38.1 cm.What is the length of a diagonal of the cube going through the center of the cube?

When SI units are plugged into an equation,it is found that the units balance.Which of the following can we expect to be true for this equation?

Calculate (0.73+0.071)(3.3 x 103), keeping only significant figures.

Since 1967 the standard definition for the second has been based on which of the following?

If ϕ = 90° − θ,what is the value of sin2 ϕ + sin2 θ?

Which one of the choices below represents the preferred practice regarding significant figures when adding the following: 14.4+13+55.12+2.774?

Modern electroplaters can cover a surface area of 60.0 m2 with one troy ounce of gold (volume = 1.611 cm3).What is the thickness of the electroplated gold?

Water flows into a swimming pool at the rate of 7 gal/min.The pool is 16 ft wide,31 ft long and 8 ft deep.How long does it take to fill? (1 U.S.gallon = 231 cubic inches)

For which of the values below is x > x7?

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

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The mass of the sun is 2.0 × 10³⁰ kg,and the mass of a hydrogen atom is 1.67 × 10−²⁷ kg.If we assume that the sun is mostly composed of hydrogen,how many atoms are there in the sun?

Suppose an equation relating position,x,to time,t,is given by x = b t³ + c t⁴,where b and c are constants.The dimensions of b and c are respectively:

A circle has an area of 4.0 m².A second circle has double the radius of the first.The area of the second circle is ____ times that of the first.

A room in a house has a floor area of 140 ft².Which of the following is most likely the approximate volume of the room?

A cement truck can pour 120 cubic yards of cement per hour.Express this in ft³/min.

If ϕ = 90° − θ,what is the value of sin² ϕ + sin² θ?

Modern electroplaters can cover a surface area of 60.0 m² with one troy ounce of gold (volume = 1.611 cm³).What is the thickness of the electroplated gold?

For which of the values below is x > x⁷?