While a physics student is tunning a guitar, the student decides to use some physics learned in class. OnThe student then measures the current tension T=57N and calculates the new tension value and restores the pitch in one step. What is the new tension (assume the linear mass density doesn't change)?

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.