College Physics 9th. Edition by Raymond A. Serway, Chris Vuille | 9780840062062 | 840062060 | Holooly

College Physics

379 SOLVED PROBLEMS

Question: 25.2

A Corrective Lens for Nearsightedness Goal Apply geometric optics to correct nearsightedness. Problem A particular nearsighted patient can’t see objects clearly when they are beyond 25 cm (the far point of the eye). (a) What focal length should the prescribed contact lens have to correct this ...

Verified Answer:

(a) Find the focal length of the corrective lens. ...

Question: 21.2

A Purely Capacitive AC Circuit Goal Perform basic AC circuit calculations for a capacitive circuit. Problem An 8.00-μF capacitor is connected to the terminals of an AC generator with an rms voltage of 1.50 × 10² V and a frequency of 60.0 Hz. Find the capacitive reactance and the rms current in the ...

Verified Answer:

Substitute the values of

f

and [lat...

Question: 18.4

Applying Kirchhoff’s Rules Goal Use Kirchhoff’s rules to find currents in a circuit with three currents and one battery. Problem Find the currents in the circuit shown in Figure 18.14 by using Kirchhoff’s rules. Strategy There are three unknown currents in this circuit, so we must obtain three ...

Verified Answer:

Apply the junction rule to point

c . I_{1}[...

Question: 26.6

The Conversion of Mass to Kinetic Energy in Uranium Fission GOAL Understand the production of energy from nuclear sources. PROBLEM The fission, or splitting, of uranium was discovered in 1938 by Lise Meitner, who successfully interpreted some curious experimental results found by Otto Hahn as due ...

Verified Answer:

(a) Calculate the final kinetic energy for the giv...

Question: 25.8

Light from Sodium Atoms GOAL Find the necessary resolving power to distinguish spectral lines. PROBLEM Two bright lines in the spectrum of sodium have wavelengths of 589.00 nm and 589.59 nm, respectively. (a) What must the resolving power of a grating be so as to distinguish these wavelengths? (b) ...

Verified Answer:

(a) What must the resolving power of a grating be ...

Question: 25.7

Resolving Craters on the Moon GOAL Calculate the resolution of a telescope. PROBLEM The Hubble Space Telescope has an aperture of diameter 2.40 m. (a) What is its limiting angle of resolution at a wavelength of 6.00 × 10² nm? (b) What’s the smallest crater it could resolve on the Moon? (The Moon’s ...

Verified Answer:

(a) What is the limiting angle of resolution at a ...

Question: 25.6

Resolution of a Microscope GOAL Study limitations on the resolution of a microscope. PROBLEM Sodium light of wavelength 589 nm is used to view an object under a microscope. The aperture of the objective has a diameter of 0.90 cm. (a) Find the limiting angle of resolution for this microscope. (b) ...

Verified Answer:

(a) Find the limiting angle of resolution for this...

Question: 11.7

Armageddon! GOAL Link mechanical energy to thermal energy, phase changes, and the ideal gas law to create an estimate. PROBLEM A comet half a kilometer in radius consisting of ice at 273 K hits Earth at a speed of 4.00 × 10^4 m/s. For simplicity, assume all the kinetic energy converts to thermal ...

Verified Answer:

(a) Find the volume and mass of the ice. Apply the...

Question: 9.9

Floating Down the River GOAL Apply Archimedes’ principle to a partially submerged object. PROBLEM A raft is constructed of wood having a density of 6.00 × 10² kg/m³. Its surface area is 5.70 m², and its volume is 0.60 m³. When the raft is placed in fresh water as in Figure 9.25, to what depth h is ...

Verified Answer:

Apply Newton’s second law to the raft, which is in...

Question: 11.1

Working Off Breakfast BIO GOAL Relate caloric energy to mechanical energy. PROBLEM A student eats a breakfast consisting of a bowl of cereal and milk, containing a total of 3.20 × 10² Calories of energy. He wishes to do an equivalent amount of work in the gymnasium by performing curls with a 25.0 ...

Verified Answer:

Convert his breakfast Calories, E, to joules: [lat...

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