Which way does a stationary front move

Aforce of 34n stretches a very light ideal spring 0.73 m from equilibrium, what is the force constant (spring constant) of the spring? (a) 47n/m (b) 38n/m (c) 53n/m (d) 25n/m

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Why should the wavelength scale of spectroscope be calibrated