At the carnival, a baby was given a helium balloon whose pressure equaled the atmospheric pressure at the carnival which was 102.7 kPa. However, the baby wasn't
paying attention and the balloon floated away into the troposphere where the
atmospheric pressure is 97.8 kPa. What is the positive difference between the
pressure in the balloon and the pressure of the troposphere in atm?
atm

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?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What is the chemical formula for the compound formed between sodium and flour one