Janine was moving a green couch into the back of her truck. The ramp was 4m long and the distance from the ground to the top of the ramp was 1m. Janine applied a force of 100N to the couch in order to move it up the ramp. The couch has a weight of 350N. a) What is the Mechanical Advantage of the ramp?

b) What is the Speed Ratio of the ramp?

c) What is the % efficiency of the ramp?

How to tell if a molecule is polar or nonpolar with electronegativity

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?