When energy is added to an object, it will vibrate at it's... A. natural frequency
B. Doppler effect
C. nodes
D. wavelength

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?

5400 j of energy are given off when a 50 g of aluminum pan changes temperature. does the temperature of the pan increase or decrease and by how much?