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This content encompasses key physics concepts related to kinetic energy, pressure in fluids, and blood pressure measurement techniques. It explains how the total kinetic energy of a baseball is influenced by its linear and rotational speeds. Additionally, it discusses the pressure dynamics in a glass filled with water versus ethyl alcohol and the effects of a figure skater's arm position on rotational rate and angular momentum. Finally, it addresses blood pressure readings taken from different body parts, considering gravitational effects.
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60 The total kinetic energy of a baseball thrown with a spinning motion is a function of: • its linear speed but not rotational speed • its rotational speed but not linear speed. • both linear and rotational speeds. • neither linear nor rotational speed.
The pressure at the bottom of a glass filled with water (ρ = 1 000 kg/m3) is P. The water is poured out and the glass is filled with ethyl alcohol (ρ = 806 kg/m3). The pressure at the bottom of the glass is now: 1). smaller than P 2) equal to P 3) larger than P 4) indeterminate.
60 A figure skater with arms initially extended starts spinning on the ice at 3 rad/s. She then pulls her arms in close to her body. Which of the following results? • a smaller rotational rate • a greater rotational rate • a greater angular momentum • a smaller angular momentum
Blood pressure is normally measured with the cuff of the sphygmomanometer around the arm. Suppose that the blood pressure is measured with the cuff around the calf of the leg of a standing person. Would the reading of the blood pressure be: 1) the same for the calf as it is for the arm? 2) greater than it is for the arm 3) less than it is for the arm 4) not enough information given
