decreasing the number of atoms ina gas but keeping but keeping their speed const

Question

decreasing the number of atoms ina gas but keeping but keeping their speed constant would?

a) decrease the heat and temperature

b) leave the heat and temperature constant

c) increase  the temperature and decrease the heat

d) decrease the heat an leave the temperature constant

17) as a gas cloud collapses to a protostar  plus disk , what happens to its overall angular momentum and speed?

a) the angular momentum and speed goes up

b) the angular momentm and speed goes down

c) the speed stays the same, but the angular momentum does down

d) the angular momentum stays the same, but the spped goes up

about how many electrons would it take to equal the masss of one proton?

a) 10^7

b)10^5

c)10^3

d) 10^-3

which of the following is corerctly ordered form least to most massive ?

a) proton, electron, planet, star

b) asteroid, planet, white dwarf, galaxy cluster

c) electron, star, galaxy, molecular cloud

d) proton, white dwarf, asteroid star, galaxy

Explanation / Answer

1 ) V = sqrt ( 2 RT /M )

b) leave the heat and temperature constant

2) d) the angular momentum stays the same, but the speed goes up

3) Mass of proton = 1.67 * ( 10^-27) kg

Mass of electron = 9,1 * 10 ^(-31) kg

Number of electrons needed to make 1 proton mass = 1.67 * (10^4) / 9.1 = 10 ^3

Hence c) 10 ^3

4) b) asteroid, planet, white dwarf, galaxy cluster

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