A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 6.62 x 10^7 km. Radio waves travel at the speed of light (3.00 x 10^8 m/s). How many seconds does it take for the signal to reach the Earth?

An observer that stands still as the electron moves by him, will observe

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?