A model airplane with mass 1.3 kg hangs from a rubber band with spring constant 20 N/m. How much is the rubber band stretched when the model
hangs motionless?
A. 0.78 m
B. 0.23
C. 0.64 m
D. 0.082 m
SUBNE

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear

Which graph represents motion with an object with positive velocity that is located at a position of 3 meters at a time of 0 seconds? a) a b) bb eliminate c) c d) d