A76 kg climber climbs to the top of mount everest, which has a peak height of 8850 m above sea level. what is the climber's potential energy with respect to sea level?

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?