2 years ago

The ____ button on the rehearsal toolbar clears the slide time box and resets the timer to 0:00:00.

1 answer:

6 0

The Rehearsal toolbar is used in Microsoft Power Point. It has buttons that allow the user to start, pause and repeat viewing the slides in the slide show. The buttons are: next, pause recording, slide time, repeat and elapsed time. The slide time button on the rehearsal toolbar clears the slide time box and resets the timer to 0:00:00.

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If you know that the period of a pendulum is 1.87 seconds, what is the length of that pendulum? (Assume that we are on Earth and

shepuryov [24]

Period of an ideal simple pendulum = 2π √(L / G)

1.87 = 2π √ (L / 9.81)

Divide each side by 2π : (1.87 / 2π) = √ (L / 9.81)

Square each side: (1.87 / 2π)² = L / 9.81

Multiply each side by 9.81 : L = (9.81) (1.87 / 2π)² =  0.869 meter

Choice 'D' is the closest one.

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1 year ago

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At the normal boiling temperature of iron, TB = 3330 K, the rate of change of the vapor pressure of liquid iron with temperature

Margaret [11]

The molar latent enthalpy of boiling of iron at 3330 K is ΔH = 342 $\times$ 10^3 J.

Explanation:

Molar enthalpy of fusion is the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure.

d ln p = (ΔH / RT^2) dt

(1/p) dp = (ΔH / RT^2) dt

dp / dt = p (ΔH / RT^2) = 3.72 $\times$ 10^-3

(p) (ΔH) / (8.31) (3330)^2 = 3.72 $\times$ 10^-3

ΔH = 342 $\times$ 10^3 J.

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1 year ago

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Which of the following statements would be best described as an expression of an attitude that is low in accessibility and high

SpyIntel [72]

Answer:

The answer is C. Ralph: “I’m not sure about bananas. I’d have to think about it.”