A2.00-kg mass vibrates according to the equation
.x = 0.650 cos 7.401, where .. is in meters and 7 in seconds
determine (a) the amplitude, (b) the frequency. (c) the
total energy, and (d) the kinetic energy and potential
energy when r = 0.260 m.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: