The power output of a 840-kHz AM radio station is 50.0 kW. If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 30 km in units of 1020. Assume no reflection from the ground or absorption by the air.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

prndulum needs thread, weight clock to time swings

in order to follow the instructions and complete the statements, i need to use data from table c of your student guide. can you think of a way to let me see your student guide for a while ? i can't answer the question without the data in table c.