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TrigonometryTrigonometry (MindTap Course List)Apparent Diameter As we mentioned in this section, for small central angles in circles with large radii, the intercepted arc and the chord arc approximately the same length. Figure 19 shows a diagram of a person looking at the moon. The arc and the chord arc essentially the same length and are both good approximations to the diameter. In astronomy, the angle α at which an object is seen by the eye is called the apparent diameter of the object. Apparent diameter depends on the size of the object and its distance from the observer. To three significant figures, the diameter of the moon is 3,470 kilometers and its average distance to the earth is 384,000 kilometers. The diameter of the sun is 1,390,000 kilometers and its mean distance to the earth is 150,000,000 kilometers. Use this information for Problems 63 through 66. The moon and the sun are, at first sight, about equal in size. How can you explain this apparent similarity in size even though the diameter of the sun is about 400 times greater than the diameter of the moon?BuyFind*arrow_forward*

8th Edition

Charles P. McKeague + 1 other

Publisher: Cengage Learning

ISBN: 9781305652224

Chapter 3.4, Problem 65PS

Textbook Problem

**Apparent Diameter** As we mentioned in this section, for small central angles in circles with large radii, the intercepted arc and the chord arc approximately the same length. Figure 19 shows a diagram of a person looking at the moon. The arc and the chord arc essentially the same length and are both good approximations to the diameter.

In astronomy, the angle
*apparent diameter* of the object. Apparent diameter depends on the size of the object and its distance from the observer. To three significant figures, the diameter of the moon is 3,470 kilometers and its average distance to the earth is 384,000 kilometers. The diameter of the sun is 1,390,000 kilometers and its mean distance to the earth is 150,000,000 kilometers. Use this information for Problems 63 through 66.

The moon and the sun are, at first sight, about equal in size. How can you explain this apparent similarity in size even though the diameter of the sun is about 400 times greater than the diameter of the moon?

Expert Solution

To determine

How can you explain apparent similarity in size of the moon and the Sun.

**Given information:**

The diameter of the Sun is 400 times the diameter of the moon.

**Formula Used:**

**Calculation:**

The angular diameter of the Sun and the moon is same.

Let the angular diameter of the Sun and the moon

Let, the diameter of moon

The diameter of the Sun is 400 times the diameter of the moon

The diameter of Sun

Let,

Trigonometry (MindTap Course List)

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Windshield Wiper An automobile windshield wiper 10...Ch. 3.4 - Cycling The Campagnolo Hyperon Ultra Two carbon...Ch. 3.4 - Cycling The Reynolds RZR 46 carbon wheel, which...Ch. 3.4 - Pac-Man Figure 17 shows an image of Pac-Man from...Ch. 3.4 - Coffee Filter A conical coffee filter is made from...Ch. 3.4 - Apparent Diameter As we mentioned in this section,...Ch. 3.4 - Apparent Diameter As we mentioned in this section,...Ch. 3.4 - Apparent Diameter As we mentioned in this section,...Ch. 3.4 - Apparent Diameter As we mentioned in this section,...Ch. 3.4 - Angle of Elevation If a 75-foot flagpole casts a...Ch. 3.4 - Height of a Hill A road up a hill makes an angle...Ch. 3.4 - Angle of Depression A person standing 5.2 feet...Ch. 3.4 - Distance and Bearing A boat travels on a course of...Ch. 3.4 - Geometry The height of a right circular cone is...Ch. 3.4 - Height of a Tree Two people decide to find the...Ch. 3.4 - If =40 is a central angle in a circle of radius 9...Ch. 3.4 - If =40 is a central angle in a circle of radius 9...Ch. 3.4 - A curve along a highway is an arc of a circle with...Ch. 3.4 - A lawn sprinkler has been set to rotate through an...Ch. 3.5 - For Questions 1 through 4, fill in each blank with...Ch. 3.5 - For Questions 1 through 4, fill in each blank with...Ch. 3.5 - For Questions 1 through 4, fill in each blank with...Ch. 3.5 - For Questions 1 through 4, fill in each blank with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Find the distance s covered by a point moving with...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Point P sweeps out central angle as it rotates on...Ch. 3.5 - Rotating Light Figure 3 shows a lighthouse that is...Ch. 3.5 - Rotating Light Using the diagram in Figure 3, find...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - In the problems that follow, point P moves with...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, find the...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - For each of the following problems, a point is...Ch. 3.5 - Velocity at the Equator The earth rotates through...Ch. 3.5 - Velocity at the Equator Assuming the radius of the...Ch. 3.5 - Velocity of a Miser Blade A mixing blade on a food...Ch. 3.5 - Velocity of a Lawnmower Blade A gasoline-driven...Ch. 3.5 - Cable Cars The San Francisco cable cars travel by...Ch. 3.5 - Cable Cars The Los Angeles Cable Railway was...Ch. 3.5 - Cable Cars The Cleveland City Cable Railway had a...Ch. 3.5 - Cable Cars The old Sutter Street cable car line in...Ch. 3.5 - Ski Lift A ski lift operates by driving a wire...Ch. 3.5 - Ski Lift An engineering firm is designing a ski...Ch. 3.5 - Velocity of a Ferris Wheel Figure 7 is a model of...Ch. 3.5 - Velocity of a Ferris Wheel Use Figure 7 as a model...Ch. 3.5 - Ferris Wheel For the Ferns wheel described in...Ch. 3.5 - Ferris Wheel For the Ferris wheeI described in...Ch. 3.5 - Velocity of a Bike Wheel A woman rides a bicycle...Ch. 3.5 - Velocity of a Bike Wheel Find the number of...Ch. 3.5 - Gear Trains Figure 8 shows a single-stage gear...Ch. 3.5 - Gear Trains Figure 8 shows a single-stage gear...Ch. 3.5 - A gear train consists of three gears meshed...Ch. 3.5 - A two-stage gear train consists of four gears...Ch. 3.5 - Cycling When a cyclist pedals. he turns a gear,...Ch. 3.5 - Cycling When a cyclist pedals. he turns a gear,...Ch. 3.5 - Cycling When a cyclist pedals. he turns a gear,...Ch. 3.5 - Cycling When a cyclist pedals. he turns a gear,...Ch. 3.5 - Cycling When a cyclist pedals. he turns a gear,...Ch. 3.5 - Alcohol Dragster On board most alcohol dragsters...Ch. 3.5 - Magnitude of a Vector Find the magnitudes of the...Ch. 3.5 - Magnitude of a Vector The magnitude of the...Ch. 3.5 - Distance and Bearing A ship sails for 85.5 miles...Ch. 3.5 - Distance and Bearing A plane flying with a...Ch. 3.5 - +Find the linear velocity of a point moving with...Ch. 3.5 - Find the angular velocity of a point moving with...Ch. 3.5 - Find the linear velocity of a point rotating at 30...Ch. 3.5 - A pulley is driven by a belt moving at a speed of...Ch. 3 - Draw each of the following angles in standard...Ch. 3 - Draw each of the following angles in standard...Ch. 3 - Use a calculator to find each of the following...Ch. 3 - Use a calculator to find each of the following...Ch. 3 - Use a calculator to find each of the following...Ch. 3 - Use a calculator to find , to the nearest tenth of...Ch. 3 - Use a calculator to find , to the nearest tenth of...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following: If...Ch. 3 - Give the exact value of each of the following:...Ch. 3 - Give the exact value of each of the following: Use...Ch. 3 - Determine if the statement sinz=2 is possible for...Ch. 3 - Evaluate 2cos(3x2) when x is 4.Ch. 3 - If =60o is a central angle in a circle of radius 6...Ch. 3 - If =5 is a central angle that cuts off an arc...Ch. 3 - Find the area of the sector formed by central...Ch. 3 - Distance A boy is twirling a model airplane on a...Ch. 3 - Area of a Sector A central angle of 4 radians cuts...Ch. 3 - Point P moves with angular velocity =4 radians per...Ch. 3 - For each of the following problems, a points is...Ch. 3 - For each of the following problems, a point is...Ch. 3 - Angular Velocity A belt connects a pulley of...Ch. 3 - Linear Velocity A propeller with radius 3.50 feet...Ch. 3 - Cable Cars If a 14 -foot-diameter sheave is used...Ch. 3 - Cycling A pro cyclist is riding in the Vuelta a...Ch. 3 - Determine the lengths of MO, OP, and MG. Figure 2...Ch. 3 - Find angle QOP in terms of and .Ch. 3 - Use right triangle trigonometry to find lengths a...Ch. 3 - We know that the angular velocity of the arm is 3...Ch. 3 - We know that the angular velocity of the arm is 3...Ch. 3 - Graph this function with your graphing calculator....Ch. 3 - We mentioned in Chapter 2 that the Ferris wheel...Ch. 3 - Use the information given in Figure 1 to find x,...Ch. 3 - Geometry Find the measure of one of the interior...Ch. 3 - Find the distance from the origin to the point...Ch. 3 - Find all angles that are coterminal with 150.Ch. 3 - In which quadrant will lie if sin0 and cos0?Ch. 3 - Find all six trigonometric functions for if the...Ch. 3 - Find the remaining trigonometric functions of if...Ch. 3 - If sec=4, find cos.Ch. 3 - Multiply (sin+3)(sin7).Ch. 3 - Prove that sin(csc+cot)=1+cos is an identity by...Ch. 3 - Find sinA , cosA, tanA, and sinB , cosB, and tanB...Ch. 3 - Fill in the blank to make the statement true: sec...Ch. 3 - Subtract 1532 from 2515.Ch. 3 - Use a calculator to find to the nearest tenth of...Ch. 3 - Give the number of significant digits in each...Ch. 3 - If triangle ABC is a right triangle with B=48o,...Ch. 3 - Distance and Bearing A ship leaves the harbour...Ch. 3 - Angle of Depression A man standing on the roof a...Ch. 3 - Vector Magnitude If vector V has magnitude 5.0 and...Ch. 3 - Static Equilibrium David and his sister Jessica...Ch. 3 - Draw 117.8o in standard position and then name the...Ch. 3 - Use a calculator to find , to the nearest tenth of...Ch. 3 - Convert 390o to radian measure. Write your answer...Ch. 3 - Give the exact value of sin53.Ch. 3 - Use the unit circle to find all values of between...Ch. 3 - Use the unit circle to explain how the value of...Ch. 3 - If =6 is a central angle in a circle of radius 12...Ch. 3 - Find the area of the sector formed by central...Ch. 3 - Point P moves with angular velocity 34 radians per...Ch. 3 - Velocity of a DVD A DVD, when placed in a DVD...

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