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Gregory Jones

Gregory J.

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ANSWERED

Pritesh Ranjan verified

Numerade educator

Four objects are held in position at the corners of a rectangle by light rods as shown in Figure P8.37. Find the moment of inertia of the system about (a) the $x$ -axis, $(\mathrm{b})$ the $y$ -axis, and $(\mathrm{c})$ an axis through $O$ and perpendicular to the page.

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Teresa Fuston verified

Numerade educator

In Exercises 39-46, determine the intervals over which the function is increasing, decreasing, or constant. $f(x) = x^2 - 4x$

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Darshan Maheshwari verified

Numerade educator

Solve each problem. Distance to Work David gets to work in 20 min when he drives his car. Riding his bike (by the same route) takes him 45 min. His average driving speed is 4.5 mph greater than his average speed on his bike. How far does he travel to work?

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INSTANT ANSWER

The graph of $f(x)=\cos x$ and a tangent line to $f$ through the origin are shown. Find the coordinates of the point of tangency to three decimal places.

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INSTANT ANSWER

Determine the van't Hoff factor for the following ionic solute dissolved in water.

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Two identical tubes, each closed at one end, have a fundamental frequency of 349 Hz at 25.0$^\circ$CC. The air temperature is increased to 31.0$^\circ$CC in one tube. If the two pipes are now sounded together, what beat frequency results? noise power if the output signal is 10 W?

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Teresa Fuston verified

Numerade educator

In Exercises $11-18,$ find the distance between the points. $$ -9.3,10.6 $$

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Darshan Maheshwari verified

Numerade educator

(a) If a flea can jump straight up to a height of $22.0 \mathrm{cm},$ what is its initial speed (in $\mathrm{m} / \mathrm{s} )$ as it leaves the ground, neglecting air resistance? (b) How long is it in the air? (c) What are the magnitude and direction of its acceleration while it is (i) moving upward? (ii) moving downward? (iii) at the highest point?

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David Collins verified

Numerade educator

Excited rubidium atoms emit red light with $\lambda=795 \mathrm{nm}$ . What is the energy difference in kilojoules per mole between orbitals that give rise to this emission?

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ANSWERED

Pritesh Ranjan verified

Numerade educator

A person on horseback moves according to the velocity-versus- time graph shown in FIGURE $2-36$ . Find the displacement of the person son for each of the following segments of the motion: (a) A, (b) B, and (c) $\mathrm{C}$ .

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