Which power of a telescope reveals fine details within an image?

a. light gathering power
b. resolving power
c. magnifying power
d. focusing power
e. defining power


b

Physics & Space Science

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At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?

a. 16 m/s b. 45 m/s c. 23 m/s d. 20 m/s e. 36 m/s

Physics & Space Science

Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the following quantities?

a. velocity c. speed b. average velocity d. displacement

Physics & Space Science

A construction worker pushes a wheelbarrow 5.0 m with a horizontal force of 50.0 N. How much work is done by the worker on the wheelbarrow?

a. 10 J b. 1250 J c. 250 J d. 55 J

Physics & Space Science

The type of radiation coming from active nuclei due to electrons spiraling in very strong magnetic fields at relativistic speeds is:

A) positron radiation. B) thermal energy. C) a blackbody curve. D) synchrotron radiation. E) nuclear energy.

Physics & Space Science