How does the intensity of a sound wave change if the distance from the source increases by a factor of 2?
A. The intensity increases by a factor of 4
B. The intensity decreases by a factor of 4.
C. The intensity decreases by a factor of 2
D. The intensity increases by a factor of 2.

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Frequency of electromagnetic waves that a radio station is assigned is called