When the term singularity is mentioned, the object under discussion is probably a

a. white dwarf.
b. black hole.
c. neutron star.
d. nova.


b

Physics & Space Science

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A hot air balloon has a volume of 2.00 × 103 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure of 1.01 × 105 Pa because of the large opening used to fill the balloon and heat the air inside it

What is the mass of hot air inside the balloon if its temperature is 120°C? The universal gas constant is 8.314 J/mol ? K. (Assume a molecular weight of 28.8 g/mol for air.) A) 1780 kg B) 5850 kg C) 203 kg D) 62.0 kg

Physics & Space Science

The relative size of the atmosphere layer as compared to the solid part of Earth is most similar to:

A) the peel of an orange as compared to the meat of the orange. B) the rind of a watermelon as compared to the meat of the watermelon. C) the skin of a grape as compared to the meat of the grape. D) the meat of a peach as compared to the pit of the peach. E) the meat of a cherry as compared to the pit of the cherry.

Physics & Space Science

Mass can be considered concentrated at the center of mass for rotational motion

Indicate whether the statement is true or false

Physics & Space Science

An alpha particle is moving at a speed of 5 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 4 × 10-2 T. The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg

(a) The radius of the path of the alpha particle is (b) The time it takes the alpha particle to complete one revolution around its path is

Physics & Space Science