Why are gases good at transferring heat through convection?

A 10.0kg water balloon is dropped from a height of 12.0m. Calculate the speed of the balloon just before it hits the ground

Consider six proposed properties of electromagnetic radiation: wave speeds of 3.00*108 km/s3.00*108 km/s and 3.00*108m/s3.00*108m/s, wavelengths of 673 nm673 nm and 0.221 nm0.221 nm, and frequencies of 2.39*1018 Hz2.39*1018 Hz and 4.85*1014 Hz4.

Give short definitions for the following terms: 1. All Atomic number 2. Mass number 3. Atomic weight 4. Isotope 5. Natural abundance 6. Atomic mass unit

The total energy in a closed system remains the same or changes as energy changes forms

Which is an element A. titanium and carbon in an alloy B. oxygen and nitrogen joined together C. a water molecule D. a piece of pure nickel ps its science

Electrons flowing into a resistor make that end A. positive with respect to the other end B. negative with respect to the other end C. higher in resistance D. extremely warm

The force of air resistance acts to oppose the motion of an object moving through the air. A ball is thrown upward and eventually returns to the ground.

The temperature of a substance during an experiment can be modeled by the function f (x) = - 7.5cos (πx30) + 31.4, where f (x) is the temperature °c and x is the number of minutes into the experiment.

Which of the following are good conductors? A. A rubber tire B. A penny C. A newspaper D. An aluminum soda can E. Water F. Air

Ideentify the two atmospheric layers that contain air as warm as 25 degrees Celsius.