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Cassandra Whitney

Cassandra W.

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Pritesh Ranjan verified

Numerade educator

ssm A volleyball is spiked so that its incoming velocity of 4.0 m/s is changed to an outgoing velocity of 21 m/s. The mass of the volley- ball is 0.35 kg. What impulse does the player apply to the ball?

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INSTANT ANSWER

In Exercises 7 and $8,$ a distance-time graph is shown. (a) Estimate the slopes of the secants $P Q_{1}, P Q_{2}, P Q_{3},$ and $P Q_{4}$ arranging them in order in a table. What is the appropriate unit for these slopes? (b) Estimate the speed at point $P .$ Accelerating from a Standstill The figure shows the distance-time graph for a 1994 Ford $^{\circ}$ Mustang CobraTM accelerating from a standstill.

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Babita Kumari verified

Numerade educator

In Exercises $31-50,$ find $f+g, f-g, f g,$ and $\frac{f}{8} .$ Determine the domain for each function. $$f(x)=\frac{3 x+1}{x^{2}-25}, g(x)=\frac{2 x-4}{x^{2}-25}$$

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Ashwin Banarsee verified

Numerade educator

In a tug-of-war between Sam and Maddy, each pulls on the rope with a force of 250 $\mathrm{N}$ . What is the tension in the rope? If both remain motionless, what horizontal force does each exert against the ground?

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Christopher Dzorkpata verified

Numerade educator

A multiple-choice examination has 15 questions, each with five possible answers, only one of which is correct. Suppose that one of the students who takes the examination answers each of the questions with an independent random guess. What is the probability that he answers at least ten questions correctly?

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Nicole Smina verified

Numerade educator

What is the effect of a nonvolatile solute on the vapor pressure of a liquid? Why is the vapor pressure of a solution different from the vapor pressure of the pure liquid solvent?

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Umar Sohail Qureshi verified

Numerade educator

A vertical load $\mathbf{P}$ is applied at end $B$ of rod $B C .$ The constant of the spring is $k,$ and the spring is unstretched when $\theta=60^{\circ} .(a)$ Neglecting the weight of the rod, express the angle $\theta$ corresponding to the equilibrium position in terms of $P, k,$ and $l_{i}(b)$ Determine the value of $\theta$ corresponding to equilibrium if $P=\frac{1}{4} k l$.

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Hubert Agamasu verified

Numerade educator

Complete the following table for an ideal gas.

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INSTANT ANSWER

The accompanying graph illustrates the decay of $_{42}^{88} \mathrm{Mo}$ which decays via positron emission. (a) What is the half-life of the decay? (b) What is the rate constant for the decay?(c) What fraction of the original sample of $_{42}^{88} \mathrm{Mo}$ remains after 12 $\mathrm{min}$ ? (d) What is the product of the decay process? [Section 21.4$]$

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Prabhat Tyagi verified

Numerade educator

When ultraviolet light with a wavelength of 400.0 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV. What is the maximum kinetic energy of the photoelectrons when light of wavelength 300.0 nm falls on the same surface?

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