147.5 ml of ethyl alcohol (coefficient of volume expansion at a temperature of 273.1 K is measured into a 150.0 ml glass beaker (whose coefficient of volume expansion is negligible by comparison). To what temperature does the beaker have to be warmed for it to be completely full (i.e. for the volume of the alcohol to reach 150.0 ml)?

A. 288.0 K
B. 278.1 K
C. 283.1 K
D. 288.2 K


D. 288.2 K

Physics & Space Science

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One of the reasons that Kapteyn underestimated the size of the Milky Way and Shapley overestimated it is that they did not recognize the ________.

A. dimming effect of interstellar dust B. age of the globular clusters C. effects of the motion of the Sun from the center D. existence of dark matter

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A geologist suspends a 0.30-kg stone on an ideal spring. In equilibrium the stone stretches the spring 2.0 cm downward. The stone is then pulled an additional distance of 1.0 cm down and released from rest

(a) Write down the equation for the vertical position y of the stone as a function of time t, using the cosine function. Take the origin at the equilibrium point of the stone, with the positive y direction upward. (b) How fast is the stone moving at a time equal to 1/3 of its period of motion?

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A nearsighted man wears contact lenses of -3.00 diopters. With these lenses, his corrected near point is 25.0 cm. What is his uncorrected near point?

What will be an ideal response?

Physics & Space Science

The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The acceleration in m/s2 after starting from rest is

a. 0 d. 8 b. 2 e. 16 c. 4

Physics & Space Science