The planet Neptune was discovered by perturbations of
A) Uranus.
B) its moons.
C) Pluto.
D) none of the above
Question 2
When a laboratory sample of unknown mass is placed on a vertical spring-scale having a force constant (spring constant) of 467 N/m, the system obeys the equation y = (4.4 cm) cos(33.3 s-1 t). What is the mass of this laboratory sample?
What will be an ideal response?