12. The mars rover, Spirit has a mass of 836 kg. Calculate its weight on Earth and on Mars. The acceleration due to gravity on Mars is 3.8 m/s?

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx