An astronaut weighs 900 N when measured on the surface of Earth. How large would the force of gravity on him be if he were in an Earth satellite at an altitude equal to Earth's radius?
A. 225 N
B. 450 N
C. 900 N
D. 3600 N
Ans: A. 225 N
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_______________ is a network of canyons 4000km long and up to 600km wide on the surface of Mars
Fill in the blank(s) with correct word
Coulomb's Law: A hydrogen nucleus, which has a charge +e, is situated to the left of a carbon nucleus, which has a charge +6e. Which statement is true?
A. The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is equal to the force exerted on the carbon nucleus. B. The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is greater than the force exerted on the carbon nucleus. C. The electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is less than the force exerted on the carbon nucleus. D. The electrical force experienced by the hydrogen nucleus is to the right, and the magnitude is equal to the force exerted on the carbon nucleus.
A water pump draws about 3.7 A when connected to 220 V. What is the cost (with electrical energy at 6.0 cents per kWh) of running the pump for 7.0 h?
a. 2.5 cents b. 9.0 cents c. 34 cents d. 68 cents e. 26 cents
Briefly describe how Hubble classified the galaxies visually
What will be an ideal response?