The atmosphere of Mars is composed of mostly carbon dioxide along with some nitrogen

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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Phil stands at rest with both feet on a scale that reads 500 N. When he gently lifts one foot, the scale reads

A) less than 500 N. B) 500 N. C) more than 500 N.

Physics & Space Science

Free Fall: A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air resistance. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?

A. 4a B. 2a C. a D. a/2 E. a/4

Physics & Space Science

During a lunar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Earth between the Moon and the Sun. The Moon has a mass of 7.36 × 1022 kg; the Earth has a mass of 5.98 × 1024 kg; and the Sun has a mass of 1.99 × 1030 kg

The separation between the Moon and the Earth is given by 3.84 × 108 m; the separation between the Earth and the Sun is given by 1.496 × 1011 m. (a) Calculate the force exerted on the Earth by the Moon. (b) Calculate the force exerted on the Earth by the Sun. (c) Calculate the net force exerted on the Earth by the Moon and the Sun.

Physics & Space Science

Low levels of ionizing radiation

a. are dangerous to the human body b. can be tolerated by the human body c. are beneficial to the human body d. none of the above

Physics & Space Science