Question

a meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013 × 105 Pa for the atmospheric pressure and 1470 kg/m3 for the density of the sauce, find the absolute pressure PB in the bulb when the distance h is (a) 0.20 m and (b) 0.12 m.

Answer 1

To calculate the absolute pressure in the meat baster bulb, use the equation PB = PA + hpg, where PA is the atmospheric pressure, h is the distance the sauce rises, p is the density of the sauce, and g is the acceleration due to gravity. Plug in the values given to find PB.

Step-by-step explanation:

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, the sauce rises in the tube to a distance h. The pressure inside the bulb can be calculated using the equation:

PB = PA + hpg

Where:

• PB is the absolute pressure in the bulb
• PA is the atmospheric pressure (1.013 × 10^5 Pa)
• h is the distance the sauce rises in the tube
• p is the density of the sauce (1470 kg/m^3)
• g is the acceleration due to gravity (9.8 m/s^2)

For part (a), when h = 0.20 m:

PB = 1.013 × 10^5 Pa + (0.20 m)(1470 kg/m^3)(9.8 m/s^2)

For part (b), when h = 0.12 m:

PB = 1.013 × 10^5 Pa + (0.12 m)(1470 kg/m^3)(9.8 m/s^2)