What is the main constituent of the atmosphere of Venus?

A) Oxygen
B) Nitrogen
C) Hydrogen
D) Carbon dioxide
E) Sulfuric acid


D

Physics & Space Science

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Equilibrium: A piano mover raises a 1000-N piano at a constant speed using a very light rope in a frictionless pulley system, as shown in the figure. With what force is the mover pulling down on the rope?

A. 2000 N B. 1000 N C. 500 N D. 250 N E. Depends on the speed of the piano.

Physics & Space Science

A helicopter is flying horizontally with a speed of 444 m/s over a hill that slopes upward with a 2% grade (that is, the "rise" is 2% of the "run")

What is the component of the helicopter's velocity perpendicular to the sloping surface of the hill? A) 8.9 m/s B) 220 m/s C) 435 m/s D) 444 m/s

Physics & Space Science

The solar neutrino problem was solved when it was discovered that neutrinos ________ during the time they take to reach the Earth

Fill in the blank(s) with correct word

Physics & Space Science

A light ray is incident on the surface of water (n = 1.33) at an angle of 60° relative to the normal to the surface. The angle of the reflected wave is

a. 80° b. 40° c. 20° d. 60° e. 30°

Physics & Space Science