ANSWER CORRECTLY FOR BRAINLIEST U=Q-W

Note: if thermal energy is lost by a system or if work is done to a system q or w need to be negative

if thermal energy is added to a system or if work is done by a system q and w will be positive

200J of thermal energy are added to a system, 50J of work are done to the system, Later, 75J of thermal energy are lost by a system and 50J of work are done by a system. what is the change of internal energy of the system.

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

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