The beaker contains water (not to the rim) and the scale reads the mass the beak

Question

The beaker contains water (not to the rim) and the scale reads the mass the beaker with the water. If you gently immersed your fingertip in the water, without touching the beaker, then the scale reading (a) doesn't change (b) shows an increase (c) shows a decrease Blocks a, b, and c have the same density. Rank in order from largest to smallest, the size of the buoyant forces F_a F_b, and F_c. (a) F_a > F_b > F_c (b) F_a > F_b > F_a (c) F_a = F_b = F_c. (d) F_b > F-a = F_c (e) F_a = F_b = F_c. A sound source departs from a stationary observer. The frequency heard by the observer is (a) higher than the source (b) lower than the source (c) the same as that of the source (d) impossible to predict A siren on a police car emits waves with a frequency f = 500 Hz. You are standing by the side of the road when a police car sounding its siren, recedes (moves away) from you at 30 m/s. What frequency do you hear? The speed of sound in air is 343 m/s. (a) 548 Hz (b) 540 Hz. (c) 450 Hz. (d) 460 Hz. (e) 470 Hz.

Explanation / Answer

(7)

The reading of the scale is equal to weight supported by it. The water in the beaker rises as finger is immersed. This is because of the weight of the volume of the water displaced supports the weight of the finger.

So, the weight of the finger acts on the scaleand the reading increases.

thus,the option (b) is correct.

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