The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127°C to -75°C. The ratio of the final volume to the initial volume is?​

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Describe the forces both attractive and repulsive that occur as two atoms move closer together.