Question

Betty is running at 5 m/s toward a whistle, which is stationary. An identical whistle is approaching Bob at 5 m/s. Which statement about the pitch of the whistle is correct?

(A) Betty and Bob both hear a pitch which is higher than normal.

(B) Betty and Bob both hear a pitch which is lower than normal.

(C) Betty perceives the pitch to be higher and Bob perceives it to be lower than normal.

(D) Betty perceives the pitch to be lower and Bob perceives it to be higher than normal.

Answer 1

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Betty is running at 5 m/s toward a whistle, which is stationary. An identical whistle is approaching Bob at 5 m/s. Which statement about the pitch of the whistle is correct?

(A) Betty and Bob both hear a pitch which is higher than normal.✅

(B) Betty and Bob both hear a pitch which is lower than normal.

(C) Betty perceives the pitch to be higher and Bob perceives it to be lower than normal.

(D) Betty perceives the pitch to be lower and Bob perceives it to be higher than normal.

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