What energy must be added or given off in a reaction where a helium atom is separated into two hydrogen atoms and two neutrons? (Atomic masses for each: hydrogen, 1.007825 u; neutron, 1.008665 u; helium, 4.002602 u; also, 1 u = 931.5 MeV/c2.)
a. 28.3 MeV given off b. 20.7 MeV added
c. 20.7 MeV given off d. 28.3 MeV added
d
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The broader the spectral line, the higher the pressure of the gas that is creating it
Indicate whether the statement is true or false
On a PV diagram where pressure is in atmospheres and V is in liters the area is measured in liter- atmospheres. What is the number of Joules in 1.00 liter-atmosphere?
A. 101.3 B. 83.1 C. 65.2 D. 22.4 E. 15.7
Coulomb's Law: Two 10¢ coins (dimes) carrying identical charges are lying 2.5 m apart on a table. If each of these coins experiences an electrostatic force of magnitude 2.0 N due to the other coin, how large is the charge on each coin? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 2.6 ?C B. 26 ?C C. 6.7 ?C D. 5.2 ?C E. 52 ?C
A 160 lb person has a mass of 160/32 = 5 slugs. A 160-lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. The elevator is accelerating downwards at 2 ft/s2
a. 150 lb b. 160 lb c. 170 lb d. none of the above