What is the name of the point on the celestial sphere that all stars seem to circle around, when viewing the sky from North America?

What will be an ideal response?


North Celestial Pole

Physics & Space Science

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A horizontal force of 40 N pushes an object of mass 5.0 kg up an inclined plane through a distance of 1.6 m measured along the plane. The plane is inclined at an angle of 30° to the horizontal. Neglect friction and use g = 10 m/s2

(a) What is the work done by the horizontal force on the object? (b) What is the work done by the net force on the object? (c) What is the work done by the normal force on the object?

Physics & Space Science

Gamma rays are

A) made up of helium nuclei. B) made up of electrons. C) a form of beta radiation. D) rays of light. E) a form of electromagnetic radiation.

Physics & Space Science

Imagine for a minute that the Moon is held in its orbit about the Earth by electrical forces rather than by gravitation. What electrical charges ?Q on the Earth and +Q on the Moon are necessary to hold the Moon in a circular orbit with a period of 27.3 days? The Earth-Moon distance is 384,000 km and the mass of the Moon is 7.35 × 10^22 kg

Physics & Space Science

What happens when a particle of matter meets its corresponding antiparticle of antimatter?

A) They can form a complete atom. B) The combined mass of the two particles is completely transformed into energy (photons). C) They fuse to make a heavier particle. D) The question makes no sense, since antimatter does not really exist.

Physics & Space Science