Consider a 2.4 kilogram feather (Big Bird) on the planet Mars. [Earth mass = 6.0 × 1024 kg = 9.3 × Mars mass; Earth radius = 6380. km = 1.89 × Mars radius]
(a) What does the feather weigh on Mars?
(b) What would the same feather weigh on Earth?
9.1 N on Mars
24. N on Earth
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A hydraulic jack is used to lift a load of weight 4000 N. The load-bearing cylinder has a radius of 4 cm, and the other piston has a radius of 1 cm. What force must be exerted on the smaller piston to support the load?
A. 100 N B. 16,000 N C. 250 N D. 1000 N E. 4000 N
A hydrogen atom that emits an alpha particle is a routine occurrence in
A) the environment. B) laboratories. C) unlikely. D) impossible.
All nine planets in the solar system have been visited by spacecraft
Indicate whether the statement is true or false
A telescope is used to view two small lights separated by 2.0 cm at a distance of 500 m. What minimum objective lens diameter is needed to just resolve these objects if their wavelength is 656 nm?
a. 2.0 cm c. 1.2 cm b. 1.0 cm d. 2.4 cm