5. the atmosphere is heated both by the sun and by the earth's surface. water radiates heat differently than land, so the air temperature over the ocean is usually different than the air temperature over land.
the difference in air temperature over land compared to over water causes convection currents in the atmosphere. how would a person at the beach experience these convection currents?
they would feel the heat of the sun.
they would feel that the water is cold.
they would feel that the sand is hot.
they would feel wind as the air moves.

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?

In the equation for the gravitational force between two objects, what does g represent?